Hach Sp-510 Hardness Analyzer User Manual

SP-510 Hardness Analyzer

Product Information

Product Name: SP-510

Model Number: DOC023.53.80422

Edition: 13

User Manual Date: 03/2022

Table of Contents

1. Section 1 Specifications
2. Section 2 General information
   1. 2.1 Safety information
   2. 2.1.1 Use of hazard information
   3. 2.1.2 Precautionary labels
   4. 2.1.3 Compliance and certification
   5. 2.2 Product overview
   6. 2.3 Product components
3. Section 3 Installation
   1. 3.1 Install the instrument
   2. 3.2 Plumb the instrument
4. Section 4 User interface and navigation
   1. 4.1 Keypad description
5. Section 5 Startup
   1. 5.1 Start the instrument
   2. 5.2 Prime the reagents (optional)
6. Section 6 Calibration
   1. 6.1 Complete a 2-point calibration
7. Section 7 Operation
8. Section 8 Maintenance
   1. 8.11 Replace the fuse
9. Section 9 Troubleshooting
   1. 9.1 Troubleshooting for a hard reading
10. Section 10 Replacement parts and consumables
11. Index

Section 1 Specifications

Specifications are subject to change without notice.

General Specifications

• Dimensions (W x D x H): 42 x 31.5 x 18 cm (16.5 x 12.5 x 7
  in.)

Product Usage Instructions

Section 3 Installation

3.1 Install the instrument

Follow the provided installation instructions to properly
install the instrument.

3.2 Plumb the instrument

Refer to the plumb instructions in the user manual to correctly
plumb the instrument.

Section 5 Startup

5.1 Start the instrument

To start the instrument, follow these steps:

1. Ensure the instrument is properly connected to a power
   source.
2. Press the power button to turn on the instrument.

5.2 Prime the reagents (optional)

If required, follow the reagent priming instructions provided in
the user manual to prime the reagents before use.

Section 6 Calibration

6.1 Complete a 2-point calibration

Perform a 2-point calibration using the instructions provided in
the user manual to ensure accurate measurements.

Section 8 Maintenance

8.11 Replace the fuse

If the fuse needs to be replaced, refer to the instructions in
the user manual for proper replacement steps.

Section 9 Troubleshooting

9.1 Troubleshooting for a hard reading

If you encounter difficulties in obtaining a reading, follow the
troubleshooting steps outlined in the user manual to resolve the
issue.

Section 10 Replacement parts and consumables

Refer to Section 10 of the user manual for information on
replacement parts and consumables for the SP-510.

DOC023.53.80422
SP-510
03/2022, Edition 13 User Manual

Table of Contents
Section 1 Specifications ……………………………………………………………………………. 3 Section 2 General information …………………………………………………………………. 4
2.1 Safety information ……………………………………………………………………………………. 4 2.1.1 Use of hazard information ……………………………………………………………….. 5 2.1.2 Precautionary labels ……………………………………………………………………….. 5 2.1.3 Compliance and certification ……………………………………………………………. 5
2.2 Product overview …………………………………………………………………………………….. 6 2.3 Product components ………………………………………………………………………………… 7
Section 3 Installation …………………………………………………………………………………. 8
3.1 Install the instrument ………………………………………………………………………………… 8 3.2 Plumb the instrument ……………………………………………………………………………… 10
3.2.1 Connect the air purge (optional) ……………………………………………………… 10 3.2.2 Sample line guidelines …………………………………………………………………… 10 3.2.3 Connect the sample stream ……………………………………………………………. 10 3.2.4 Install the pump valve pressure plate ………………………………………………. 11 3.2.5 Install the sample conditioning kit ……………………………………………………. 11 3.3 Electrical installation ………………………………………………………………………………. 12 3.3.1 Remove the access cover ……………………………………………………………… 12 3.3.2 Electrical connections for conduit ……………………………………………………. 13 3.3.3 Wiring for power …………………………………………………………………………… 14 3.3.4 Select the voltage …………………………………………………………………………. 14 3.3.5 Connect the alarm relays ……………………………………………………………….. 14 3.4 Install the buffer solution …………………………………………………………………………. 15 3.5 Install the indicator solution …………………………………………………………………….. 15 3.6 Install the stir bar …………………………………………………………………………………… 16
Section 4 User interface and navigation ……………………………………………… 16
4.1 Keypad description ………………………………………………………………………………… 16
Section 5 Startup ……………………………………………………………………………………….. 17
5.1 Start the instrument ……………………………………………………………………………….. 17 5.2 Prime the reagents (optional) ………………………………………………………………….. 17
Section 6 Calibration ………………………………………………………………………………… 18
6.1 Complete a 2-point calibration …………………………………………………………………. 18
Section 7 Operation ………………………………………………………………………………….. 18 Section 8 Maintenance …………………………………………………………………………….. 18
8.1 Maintenance schedule ……………………………………………………………………………. 19 8.2 Clean the instrument ………………………………………………………………………………. 19 8.3 Clean the instrument interior ……………………………………………………………………. 19 8.4 Clean spills …………………………………………………………………………………………… 19 8.5 Replace the reagent ………………………………………………………………………………. 19 8.6 Change the alarm trip point …………………………………………………………………….. 20 8.7 Replace the pump tubes …………………………………………………………………………. 20 8.8 Replace the tubing …………………………………………………………………………………. 20 8.9 Clean the colorimeter ……………………………………………………………………………… 20 8.10 Replace the sample conditioning filter …………………………………………………….. 20
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Table of Contents 8.11 Replace the fuse ………………………………………………………………………………….. 21
Section 9 Troubleshooting ……………………………………………………………………… 21
9.1 Troubleshooting for a hard reading …………………………………………………………… 22
Section 10 Replacement parts and consumables……………………………… 23 Index ……………………………………………………………………………………………………………….25
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Section 1 Specifications
Specifications are subject to change without notice. General specifications

Specification Dimensions (W x D x H)

Details 42 x 31.5 x 18 cm (16.5 x 12.5 x 7 in.)

Enclosure rating

IP62

Weight

11.3 kg (25 lbs)

Installation environment

Indoor

Mount

Wall

Pollution degree/installation

2/II

category

Protection class

I

Altitude

Maximum 2000 m (6562 ft)

Light source

Class 1 LED (light emitting diode) with peak wavelength of 610 nm. Estimated 50,000 hours minimum life; hard water and soft water indicator.

Detector

Silicon photo detector

Optical path length

8.89 mm (0.35 in.)

Time delay

One reading above the trip point is necessary to trigger a soft-to-hard water alarm transition. One reading below the trip point is necessary to trigger a hard-to-soft water alarm transition.

Trip point

0.3, 1, 2, 5, 10, 20, 50 and 100 mg/L. Refer to Trip point specifications on page 4.

Reagents

Buffer and indicator solution. 500 mL of each reagent every 2 months.

Reagent shelf life

1 year

Power requirements

115/230 VAC, 70 VA, 50/60 Hz, 1.25 A Fuse

Electrical connections

Two 3-wire barrier terminal blocks. Wire range: 18­12 AWG (0.75­1.0 mm2)

Hard water alarm relay

SPDT relay, set to on when the hard water indicator is on. The alarm can be disabled.

Contact rating

5 A resistive at 100­240 VAC

Operating temperature

5 to 40 °C (32 to 104 °F)

Storage temperature

-40 to 60 °C (-40 to 140 °F)

Operating humidity

Relative humidity: 5­95% at different temperatures, noncondensing

Sampling rate

New sample: every 1.9 minutes ±5% at 60 Hz; 2.3 minutes ±5% at 50 Hz

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Specification Sample flow rate to sample conditioning Inlet pressure to instrument
Inlet pressure to sample conditioning Inlet fitting
Drain fitting Sample temperature range Certifications Warranty

Details 50 to 500 mL/minute flow rate necessary (250 mL/minute recommended) 1 to 5 psig (0.07 to 0.34 bar), 1.5 psig (0.1 bar) is optimum, > 5 psig (0.34 bar) can cause sample tubing failure 1.5 psig to 75 psig (0.1 to 5.2 bar)
At instrument, 6.35 mm (0.25 in.) OD polyethylene tubing with quick-disconnect fitting Hose barb for 12.7 mm (0.5 in.) ID flexible tubing 5 to 40 °C (41 to 104 °F) CE, cETLus 1 year (EU: 2 years)

Trip point specifications

Alarm trip point Minimum trip value

0.3 mg/L

0.22 mg/L

1 mg/L

0.75 mg/L

2 mg/L

1.5 mg/L

5 mg/L

3.75 mg/L

10 mg/L 20 mg/L

7.5 mg/L 15.0 mg/L

50 mg/L

37.5 mg/L

100 mg/L

75.0 mg/L

Maximum trip value Temperature influence on trip point

0.38 mg/L

­0.03 mg/L per °C

1.25 mg/L

­0.03 mg/L per °C

2.5 mg/L

­0.03 mg/L per °C

6.25 mg/L

­0.06 mg/L per °C

12.5 mg/L

­0.08 mg/L per °C

25.0 mg/L

­0.09 mg/L per °C

62.5 mg/L

­0.29 mg/L per °C

125.0 mg/L

­0.60 mg/L per °C

Section 2 General information
In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential damages resulting from any defect or omission in this manual. The manufacturer reserves the right to make changes in this manual and the products it describes at any time, without notice or obligation. Revised editions are found on the manufacturer’s website.
2.1 Safety information
The manufacturer is not responsible for any damages due to misapplication or misuse of this product including, without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent permitted under applicable law. The user is soley responsible to identify critical application risks and install appropriate mechanisms to protect processes during a possible equipment malfunction.
Please read this entire manual before unpacking, setting up or operating this equipment. Pay attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment.
Make sure that the protection provided by this equipment is not impaired. Do not use or install this equipment in any manner other than that specified in this manual.

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2.1.1 Use of hazard information
DANGER
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate injury.
NOTICE
Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special emphasis. 2.1.2 Precautionary labels Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if not observed. A symbol, if noted on the instrument, will be included with a danger or caution statement in the manual.
This is the safety alert symbol. Obey all safety messages that follow this symbol to avoid potential injury. If on the instrument, refer to the instruction manual for operation or safety information.
Electrical equipment marked with this symbol may not be disposed of in European domestic or public disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no charge to the user.
This symbol indicates the need for protective eye wear.
This symbol identifies a risk of chemical harm and indicates that only individuals qualified and trained to work with chemicals should handle chemicals or perform maintenance on chemical delivery systems associated with the equipment.
This symbol indicates that a risk of electrical shock and/or electrocution exists.
This symbol indicates that a risk of fire is present.
This symbol, when noted on the product, identifies the location of a fuse or current limiting device.
2.1.3 Compliance and certification
CAUTION
This equipment is not intended for use in residential environments and may not provide adequate protection to radio reception in such environments.
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Canadian Radio Interference-Causing Equipment Regulation, ICES-003, Class A: Supporting test records reside with the manufacturer. This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de classe A répond à toutes les exigences de la réglementation canadienne sur les équipements provoquant des interférences. FCC Part 15, Class “A” Limits Supporting test records reside with the manufacturer. The device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions:
1. The equipment may not cause harmful interference. 2. The equipment must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications to this equipment not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at their expense. The following techniques can be used to reduce interference problems:
1. Disconnect the equipment from its power source to verify that it is or is not the source of the interference.
2. If the equipment is connected to the same outlet as the device experiencing interference, connect the equipment to a different outlet.
3. Move the equipment away from the device receiving the interference. 4. Reposition the receiving antenna for the device receiving the interference. 5. Try combinations of the above.
2.2 Product overview
DANGER
Chemical or biological hazards. If this instrument is used to monitor a treatment process and/or chemical feed system for which there are regulatory limits and monitoring requirements related to public health, public safety, food or beverage manufacture or processing, it is the responsibility of the user of this instrument to know and abide by any applicable regulation and to have sufficient and appropriate mechanisms in place for compliance with applicable regulations in the event of malfunction of the instrument.
The SP-510TM Hardness Monitor continuously measures water softener levels to find hardness breakthroughs based on softener exhaustion. The monitor is used in commercial and industrial water applications. The monitor has an automatic control system that starts regeneration sequences with the alarm circuit. Hardness is measured at different levels as CaCO3 with the applicable indicator and reagent solutions. A relay closes when the instrument measures a hardness value that is more than the trip point. Refer to Figure 1 for the product overview.
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Figure 1 Product overview

1 Power switch 2 Power access port 3 Relay and alarm contact access port 4 Air purge (optional) 5 Access cover 6 Colorimeter

7 Keypad 8 Pump/valve module 9 Indicator and reagent bottles 10 Sample inlet 11 Enclosure drain 12 Sample drain

2.3 Product components
Make sure that all components have been received. Refer to Figure 2. If any items are missing or damaged, contact the manufacturer or a sales representative immediately.

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Figure 2 Product components

1 SP-510 Hardness Monitor 2 Installation kit1 3 Maintenance kit2 4 Buffer solution

5 Indicator solution
6 Magnesium sulfate solution 7 TitraVer® (EDTA) hardness titrant

Section 3 Installation

DANGER

Electrocution hazard. Always remove power to the instrument before making electrical connections.

DANGER
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the document.

3.1 Install the instrument
Install this instrument on an indoor wall, away from direct sunlight.
· For a complete purge of the sample line during each cycle, install the instrument as close to the sample point as possible.
· Leave sufficient clearance at the bottom and sides for tubing and cable connections.
Refer to Figure 3 and Figure 4.

1 Refer to the installation kit documentation for more information. 2 Refer to the maintenance kit documentation for more information. 8 English

Figure 3 Dimensions for wall installation Figure 4 Door clearance
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3.2 Plumb the instrument

CAUTION

Fire hazard. This product is not designed for use with flammable liquids.

CAUTION
Chemical hazard. If there is a leak in the fluid system, hazardous substances may leak out of the lower enclosure. Put the supplied reagent bottle tray or a bucket under the drain to catch any spills.
CAUTION
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and national regulations.
Use quick-connect type connectors for ¼-inch OD tubes to install the sample inlet and drain connections.
1. Install 3 feet of tubing in the ½-inch enclosure drain to keep dust out of the analyzer. Refer to Figure 1 on page 7, item 11. Note: Make sure that the enclosure drain is open. The drain must be open to remove sample water if leaks occur.
2. Push the ¼-in OD poly tube on the sample line connector. The tube will “stop” two times as it is pushed on the connector. For more information, refer to the installation kit documentation.
3. Make sure that the tubes are pushed completely on the connector. Incorrect installation can cause the tube to come off of the connector when water pressure is applied. Note: The sample drain connector will install on ½-inch ID flexible tubes (customer-supplied).
3.2.1 Connect the air purge (optional) An air purge is necessary in an environment with high humidity or caustic vapors.
Note: Use only dry, oil-free instrument air at 0.42 m3 (15 standard cubic feet) per hour (scfh).
1. Find the air purge connection on the left side of the instrument enclosure. Refer to Figure 1 on page 7.
2. Remove the plug in the quick-connect fitting. 3. Push the ¼-inch poly tubing into the fitting. Make sure to have two different “stops” so that the
tubing cannot disconnect when air pressure is applied.
3.2.2 Sample line guidelines Select a good, representative sampling point for the best instrument performance. The sample must be representative of the entire system. To prevent erratic readings:
· Collect samples from locations that are sufficiently distant from points of chemical additions to the process stream.
· Make sure that the samples are sufficiently mixed. · Make sure that all chemical reactions are complete.
3.2.3 Connect the sample stream Install the sample line into the center of a larger process pipe to minimize interference from air bubbles or bottom sediment. Figure 5 shows examples of good and bad installation.

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Keep the sample lines as short as possible to prevent the accumulation of bottom sediment. The sediment can absorb some of the analyte from the sample and cause low readings. The sediment can later release the analyte and cause high readings. This exchange with the sediment also causes a delayed response when the analyte concentration in the sample increases or decreases.
Figure 5 Sampling methods

1 Air

2 Sample flow

3.2.4 Install the pump valve pressure plate
The pressure plate and screws are supplied with the installation kit. Remove the tape from the pump tubes before installation.
Make sure to turn the screws in small increments and move from one screw to the other so that the plate is pulled down equally. Do not overtighten. To install the pressure plate, refer to Figure 6.

Figure 6 Install the pressure plate

3.2.5 Install the sample conditioning kit The sample conditioning kit is supplied with the instrument. The kit removes large particles from the sample stream with a 40-mesh strainer. The ball valve on the raw sample inlet controls the flow to the filter. The ball valve on the instrument supply line controls the flow rate of filtered sample to the instrument. For complete sample conditioning installation instructions, refer to the installation kit documentation. Refer to Figure 7.
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Figure 7 Sample flow through the conditioning kit

1 Sample flow
2 Bypass flow 3 Drainage flow

4 Bypass tee, unfiltered sample
5 Flow observation point 6 Filtered-sample bypass ball
valve (shown open)

7 Unfiltered-sample ball valve (shown open)
8 Low-flow valve option 9 High-flow valve option

3.3 Electrical installation

DANGER

Electrocution hazard. Always remove power to the instrument before making electrical connections.

3.3.1 Remove the access cover Remove the access cover to connect to the wiring terminals. Refer to Figure 8.

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Figure 8 Access cover removal

3.3.2 Electrical connections for conduit
DANGER
Electrocution hazard. Use only fittings that have the specified environmental enclosure rating. Obey the requirements in the Specifications section.
DANGER
Electrocution hazard. If this equipment is used outdoors or in potentially wet locations, a Ground Fault Circuit Interrupt (GFCI/GFI) device must be used for connecting the equipment to its main power source.
WARNING
Electrocution hazard. Install a 10 A circuit breaker for mains power. Identify the circuit breaker with a label, as a local disconnect for this equipment.
The instrument has plugs in all of the conduit holes. To keep the IP62 environmental rating, use liquid-tight sealing-type conduit fittings and cord strain reliefs. Connect the equipment in accordance with local, state or national electrical codes. If connections are not made through a conduit opening, install a liquid-tight seal in place of the plugs. Refer to Figure 9.
Figure 9 Power connections

1 Conduit (preferred)

2 Power cord (optional)

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3.3.3 Wiring for power To connect the instrument to power, refer to Figure 10 and Table 1.
Figure 10 Power connection

1 Voltage switch (in 115 V position) 2 Voltage switch (in 230 V position)

3 AC power connector 4 Fuses (F1 and F2)

Table 1 Terminal wiring

Wire color code

Protective earth ground

Hot or Ø1

North America

Green

Black

International electrotechnical commission (IEC)

Green with yellow line

Brown

Neutral or Ø2
White Blue

3.3.4 Select the voltage
NOTICE
To prevent serious damage to the instrument, make sure that the line voltage is set correctly. Refer to Figure 10 on page 14.
The instrument is set to 115-volt operation at the factory. To change the line voltage to 230-volt operation, slide the voltage switch to the 230 V position. Refer to Figure 10 on page 14. Note: The fuses are approved for North American and European use and do not need to be changed with the voltage. 3.3.5 Connect the alarm relays
CAUTION
Fire hazard. Relay loads must be resistive. Always limit current to the relays with an external fuse or breaker. Obey the relay ratings in the Specifications section.

The current to the relay contacts must be 5 A or less. Make sure to have a second switch available to remove power from the relays locally in case of an emergency or for maintenance. Power can be removed with an external switch and a 5 A fuse or with a switched 5 A circuit breaker.

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Figure 11 shows the alarm relay contacts connected to the terminal strip with normally open and normally closed terminations. Terminals are unpowered and rated for 5 A at 100­240 VAC resistive load. The relay connector accepts 18­12 AWG (0.75­1.0 mm2) wire. Select the necessary wire gage that operates with the application. A wire gauge less than 18 AWG (0.75 mm2) is not recommended.
Figure 11 Alarm connections

Terminal block J7

Table 2 Relay wiring

Terminal 1

Terminal 2

COM

Normally open (NO)

Terminal 3 Normally closed (NC)

3.4 Install the buffer solution
Buffer solutions are formulated at the factory and are ready to install without preparation. Put the bottle in the instrument as shown in Figure 12 on page 16. Refer to Buffer and indicator solution for the applicable trip point on page 24.
3.5 Install the indicator solution
Indicator solutions are formulated at the factory and are ready to install without preparation. Put the bottle in the instrument as shown in Figure 12. Refer to Buffer and indicator solution for the applicable trip point on page 24.

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Figure 12 Install the buffer and indicator reagents

1 Indicator reagent tube label and bottle

2 Buffer tube label and bottle

3.6 Install the stir bar
A stir bar is included in the installation kit. Install the stir bar in the colorimeter sample cell for correct operation. Refer to Figure 13.
Figure 13 Install the stir bar

Section 4 User interface and navigation 4.1 Keypad description
Refer to Figure 14 and to Table 3 for the keypad description and navigation information.
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Figure 14 SP-510 keypad
Table 3 Keypad description Key Function Description 1 HARD LED The monitor found hardness in the water. The status indicator light is red. 2 SOFT LED The monitor is in operation and no hardness shows. The status indicator light
is green. 3 ALARM OFF Sets the alarm to off. When more cycles are necessary to examine the water,
set the alarm to off. The status indicator light is yellow. 4 HARD CAL Completes a hard calibration. Refer to Calibration on page 18. The status
indicator light is yellow. 5 ZERO CAL Completes a zero-point calibration. Refer to Calibration on page 18. The
status indicator light is yellow.
Section 5 Startup 5.1 Start the instrument
Note: Install the pressure plate correctly to prevent sample flow directly into the reagents. Refer to Install the pump valve pressure plate on page 11. 1. Open the supply valve to the instrument. 2. Let the pressure in the tubes stabilize.
Note: If leaks occur under pressure, examine all connections. Secure connections until all leaks have stopped. 3. Set the power to on. 4. Operate the instrument for approximately 2 hours with the sample and reagents.
Note: The sample cell will have bubbles on the surface until it is fully wetted. The bubbles can cause irregular readings until the sample flow stabilizes.
5.2 Prime the reagents (optional)
Prime the reagents to decrease the start up time to 15 minutes. 1. Set the sample flow to the instrument to off. 2. Disconnect the reagent feed line after the “Y” fitting at the colorimeter. 3. Connect a syringe to the tubing that comes from the “Y” fitting. 4. Loosen the two screws on the pump pinch plate so that the reagents can be pulled through the
reagent lines. 5. Use the syringe to remove the air and fill the lines with reagent.
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6. Tighten the screws on the pump pinch plate. Do not overtighten. 7. Remove the syringe from the tubing and connect the fitting on the colorimeter.
Section 6 Calibration
CAUTION
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets (MSDS/SDS) for safety protocols.

6.1 Complete a 2-point calibration
Complete a calibration after reagent installation or when an optical system component is replaced. The standardization procedure makes the sample first hard, then soft.

1. Remove the plug from the top port of the colorimeter. Refer to Figure 13 on page 16. 2. Push HARD CAL. The hard cal LED is on continuously. 3. When the hard cal LED flashes, add two drops of Magnesium Standard Solution into the
colorimeter. 4. When the LED stops flashing and is on continuously, wait for the cycle to complete.
At the end of the cycle, the LED sets to off to show a successful calibration. 5. HARD CAL failure: When the LED starts to flash, push HARD CAL to confirm a hard cal failure.
Do steps 2­4 again. 6. Push ZERO CAL. The zero cal LED is on continuously. 7. When the zero cal LED flashes, add two drops of EDTA Solution, 10 g/L, into the colorimeter. 8. When the LED stops flashing and is on continuously, wait for the cycle to complete.
At the end of the cycle, the LED is set to off to show a successful calibration. 9. ZERO CAL failure: When the LED starts to flash, push ZERO CAL to confirm a zero cal failure.
Do steps 1­7 again. 10. Replace the plug in the top port of the colorimeter.

Section 7 Operation
After the instrument power is set to on, the SOFT LED flashes until the first reading cycle is completed. The cycle takes 2 minutes. Then, the SOFT LED shows a stable green light.
The HARD LED comes on with a red light when the sample reagent mixture measurement is higher than the trip point for one measurement. Push ALARM OFF to set the alarm relay to off. The ALARM OFF light will show a yellow light.
The instrument operates maintenance-free for a minimum of 2 months. Periodically, do a visual check to see if bubbles are in the tubing. If there are bubbles, look for an air leak. Refer to Maintenance schedule on page 19 for maintenance tasks.

Section 8 Maintenance

DANGER

Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the document.

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8.1 Maintenance schedule

Table 4 shows the recommended schedule of maintenance tasks. Facility requirements and operating conditions can increase the frequency of some tasks.

Table 4 Maintenance schedule

Task

2 months 3 months 6 months 1 year As necessary

Replace the reagent on page 19

x

Replace the pump tubes on page 20

x3

x4

Replace the tubing on page 20

x

Clean the colorimeter on page 20

x

Replace the sample conditioning filter

x

on page 20

Replace the fuse on page 21

x

8.2 Clean the instrument
Clean the exterior of the instrument with a moist cloth and a mild soap solution and then wipe the instrument dry as necessary.

8.3 Clean the instrument interior
CAUTION
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets (MSDS/SDS) for safety protocols.
Refer to the MSDS for instructions to safely clean reagent spills and leaks. Obey all local and federal regulations to dispose of cleaning materials.

8.4 Clean spills

CAUTION

Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and national regulations.

1. Obey all facility safety protocols for spill control. 2. Discard the waste according to applicable regulations.
8.5 Replace the reagent
CAUTION
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and national regulations.
Note: Do not pour the remaining reagent into new bottles. One 500-mL bottle of each buffer and indicator solution can be used for approximately 2 months.
3 Ambient operating temperatures more than 27 °C (80.6 °F) 4 Ambient operating temperatures less than 27 °C (80.6 °F)
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1. Discard the old containers with remaining contents in compliance with MSDS and regulatory requirements.
2. Install the new bottles. Refer to Install the buffer solution on page 15 and Install the indicator solution on page 15.
8.6 Change the alarm trip point
Install the applicable buffer and indicator solution to change the alarm trip point to a different hardness level. Let the instrument operate for 2 hours to purge the used reagents. Calibrate the instrument again. Refer to Trip point specifications on page 4 and to Calibration on page 18.
8.7 Replace the pump tubes
Over a period of time, the clamping action of the pump/valve module will soften the tubing. This causes the tubing to break and prevents liquid flow. Leaks can occur. The tubing wear is increased at high temperatures. Therefore, the pump tube replacement schedules are based on the ambient operating temperature. Refer to Maintenance schedule on page 19 for the maintenance interval. Refer to the documentation supplied with the maintenance kit.
8.8 Replace the tubing
The manufacturer recommends that one tube is replaced at a time. Refer to the documentation supplied with the maintenance kit.
8.9 Clean the colorimeter
WARNING
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets (MSDS/SDS) for safety protocols.
The colorimeter measuring cell can collect sediment or cause layers to grow on the inside walls. Clean the cell with an acid solution and a cotton swab on a monthly basis. Items to collect:
· Sulfuric acid standard solution, 19.2 N, 100 mL MDB · Wooden or paper cotton-tipped swab · Bent steel paper clip · Stir bar (optional)
1. Remove the plug from the top port of the colorimeter. Refer to Figure 13 on page 16. 2. Remove the magnetic stir bar with a bent steel paper clip as a retrieval tool. 3. Use the pipette to add 2­3 drops of 19.2 N sulfuric acid standard solution in the colorimeter.
Note: Lower normality sulfuric acid is not sufficient to clean the colorimeter. 4. Let the sulfuric acid stay in the colorimeter for 15 minutes. 5. Use a wooden or cotton-tipped swab to clean the interior surfaces of the colorimeter cell. Move
the cotton-tipped swap gently up and down. Note: Do not use a plastic swab to clean the colorimeter with sulfuric acid. The acid will dissolve the plastic. 6. Make sure that the measurement cell is dry. 7. Clean the stir bar with water or alcohol or replace the stir bar. 8. Replace the plug in the top port of the colorimeter.
8.10 Replace the sample conditioning filter
Examine the sample conditioning filter regularly when lots of solids are in the sample. Replace the sample conditioning filter if necessary. Refer to Maintenance schedule on page 19 for the maintenance interval. Refer to the documentation supplied with the installation kit.
20 English

8.11 Replace the fuse DANGER
Electrocution hazard. Remove power from the instrument before doing maintenance or service activities.
DANGER
Fire hazard. Use the same type and current rating to replace fuses.

Remove the two fuses (F1 and F2) and replace them with two new fuses with the same specifications, T, 1.25 A, 250 V. The same fuse rating is used for the 115 V and for the 230 V operation. Refer to Figure 10 on page 14.

Section 9 Troubleshooting

Problem
The SOFT LED light is not on and the pump motor does not operate.

Possible cause No power

Solution
· Make sure that the power switch is set to on.
· Connect the power cord. · Replace the fuses if necessary.

The SOFT LED light is not on and the pump motor does operate. The SOFT LED light is on but the pump motor does not operate.
The reading is continually high. The HARD LED is on.

Problem with the power Replace the main circuit board.

supply

Contact technical support.

Operation power is low

Make sure that the line voltage is within specification.

Voltage selector setting is Set the line voltage selector switch to

not correct

the correct voltage.

Motor cable is not connected

Connect the motor cable connection.

Motor does not operate Replace the motor.

· No stir bar · LED is not connected · No sample flow · Out of reagents

Refer to Troubleshooting for a hard reading on page 22. If the problem continues, cycle power to the instrument, examine all power connections and fuses, replace the circuit board or contact technical support.

English 21

Problem The HARD LED is flashing.
The SOFT LED is flashing continuously for more than 5 minutes after the power is set to on.

Possible cause
The instrument could not save the calibration information.
The instrument could not save the disabled alarm status.
The optical path has a blockage or the optical switch does not work.

Solution Contact technical support.
· Let the instrument complete the cycle.
· Make sure that the motor operates.
· Set the power to off and then to on and wait for 5 minutes.
· Contact technical support.

9.1 Troubleshooting for a hard reading
When the red LED is on continuously and the instrument measures hard water, do the steps that follow.

Cause

Solution

If the flow is too low, the sample cell does not flush completely all the color out of the colorimeter. This causes a zero reading. If the flow is too high, some of the water will bypass the pinch block and cause the color to be diluted.

Make sure to set the flow rate to 200 mL/minute.

The sample line is pinched off in the pinch block.

· Pull the sample line from the colorimeter. Water that is already in the line could leak out. Examine and adjust the flow rate when a steady water stream comes out while the line is pinched. Set the flow rate to 200 mL/minute.
· Make sure that the pressure plate of the pinch block is not overtightened.
· Examine the back of the pinch blocks and make sure that they do not have grooves.

No stir bar is installed or more than one stir bar is installed.

· Make sure that a stir bar is installed.
· Use a paper clip to retrieve the stir bar from the colorimeter and make sure that multiple stir bars are not installed.
· If the stir bar does not operate, mix the sample manually after the reagents have been added. Use the end of a wooden Q-tip and mix the reagents approximately for 10 seconds. If the instrument gets a reading, the mixing is not sufficient. Replace the stir coil. Refer to Replacement parts and consumables on page 23.

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Cause The instrument does not receive any buffer or indicator solution.
The chemistry does not operate correctly. The instrument does not operate correctly.

Solution
Remove the two reagent lines from the Y connector. Only one drop of reagent comes out per cycle. If no reagent comes out, examine the pressure plate. Make sure that the pinch block is not overtightened and the reagent lines are not pinched. Examine the back of the pinch block for grooves. Replace the pinch block if necessary.
Mix 1-mL of each reagent and 80-mL of sample. A color change must show. If no color change shows, replace the reagents.
Pinch the sample inlet line to stop the sample flow. The next cycle reads soft. If it does not read soft, examine the LED if it shows an orange light. Examine the photocell and clean if necessary. After this cycle, the instrument reads hard again.

Section 10 Replacement parts and consumables
WARNING
Personal injury hazard. Use of non-approved parts may cause personal injury, damage to the instrument or equipment malfunction. The replacement parts in this section are approved by the manufacturer.
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to the company website for contact information. Refer to the installation kit and maintenance kit documentation for more information.
Replacement parts

Description
Cam/coupler assembly Circuit board assembly Colorimeter flow-cell assembly Colorimeter drain plug Follower block, reagent Follower block, sample Fuse (T, 1.25 A, 250 V) UL/CSA/CE accepted LED LED housing, lower LED housing, upper Maintenance kit Installation kit Motor assembly Photo detector Pressure plate Stir bar, micro, 3 x 8 mm

Item no.
5410500 5694800 5516200 5103600 4274100 4274200 5516700 4350800 5412700 5412800 5516500 5516400 5411900 5411300 5411800 5412900

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Replacement parts (continued)
Description Stir coil Thumb screw to hold pressure plate (2x) Tubing, 0.16 cm (0.0625 in.) ID, white Tubing, 0.11 cm (0.043 in.) ID, brown Y fitting/strainer, 40 mesh

Accessories
Description Seal, oil-tight Power cord kit for 115 V North American operation Power cord kit for 230 V European operation

Consumables
Description
EDTA solution, dropping bottle Magnesium standard solution, dropping bottle SP510 Hardness Monitor indicator solution for 25 ppm SP510 Hardness Monitor indicator solution for 50 ppm SP510 Hardness Monitor indicator solution for 100 ppm Sulfuric acid standard solution, 19.2 N, MDB

Quantity
10 g/L, 1 oz. 10 g/L, 1 oz.
500 mL 500 mL 500 mL 100 mL

Buffer and indicator solution for the applicable trip point

Trip point

Buffer5 item no.

0.3 mg/L 1 mg/L 2 mg/L 5 mg/L 10 mg/L 20 mg/L 50 mg/L 100 mg/L

2768549 2768549 2768549 2768549 2768649 2768749 2768849 2768949

Item no. 5411100 5410100 4271700 5412100 4661600
Item no. 4221000 4630600 4630800
Item no. 102133 102233 2502749 2502849 2502949 203832
Indicator item no.
2794649 2769049 2769149 2769249 2769249 2769249 2769249 2769249

5 500 mL bottle 24 English

A
Air purge ………………………………………………… 10 Alarm …………………………………………………….. 14 Alarm trip point ……………………………………….. 20
B
Buffer solution ………………………………………… 15
C
Calibration ……………………………………………… 18 Chemistry ………………………………………………. 22 Colorimeter …………………………………………….. 20
D
Dimensions ………………………………………………. 8
F
Fuse ………………………………………………………. 21

Index K
Keypad ………………………………………………….. 16
N
Navigation ……………………………………………… 16
P
Pressure plate ………………………………………… 11
R
Reagent ……………………………………………. 15, 19 Reagent line …………………………………………… 22 Relay …………………………………………………….. 14
S
Sample conditioning kit ……………………………. 11 Sample line …………………………………………….. 22 Stir bar ……………………………………………… 16, 22

H
Hard calibration ………………………………………. 18 Hard reading …………………………………………… 22
I
Indicator solution …………………………………….. 15

V
Voltage selection …………………………………….. 14
Z
Zero calibration ……………………………………….. 18

25

HACH COMPANY World Headquarters P.O. Box 389, Loveland, CO 80539-0389 U.S.A. Tel. (970) 669-3050 (800) 227-4224 (U.S.A. only) Fax (970) 669-2932 [email protected] www.hach.com

HACH LANGE GMBH Willstätterstraße 11 D-40549 Düsseldorf, Germany Tel. +49 (0) 2 11 52 88-320 Fax +49 (0) 2 11 52 88-210 [email protected] www.de.hach.com

HACH LANGE Sàrl 6, route de Compois 1222 Vésenaz SWITZERLAND Tel. +41 22 594 6400 Fax +41 22 594 6499

© Hach Company/Hach Lange GmbH, 2013, 2014, 2016­2018, 2020­2022. All rights reserved.

References

• Geräte und Reagenzien für die Wasserqualitätsanalyse | Hach
• Hach | Hach