Thermoworks Thermacheck Plus & Therma 20/22 Plus Instructions

ThermoWorks ThermaCheck Plus & Therma 20/22 Plus Instructions

INSTRUMENT OPERATION

Where applicable (Therma 20 Plus and Therma 22 Plus) connect a probe via the socket located at the top of the instrument, screw in the collar of the plug, finger tight, to ensure a secure connection (do not over tighten). Switch the instrument on and apply the tip of the probe to the substance or medium to be measured. The instrument reading may take a few seconds to stabilize, depending on the nature of the measurement and sensitivity of the probe.

HOLD
Press the HOLD button to stop measurements and freeze the display temporarily, press again to continue measuring.

AUTO-OFF
The unit will switch off automatically after 10 minutes. To disable auto-off press the HOLD button while switching on the instrument (this is reset when the instrument is switched off).

OPEN CIRCUIT/FAULTY PROBE

If the probe has developed an ‘Open Circuit’ fault the instrument will display ‘Err’.

SENSORS
The ThermaCheck Plus incorporates a fixed thermistor probe. The Therma 20 Plus operates with an interchangeable thermistor probe. The Therma 22 Plus operates with either a interchangeable thermistor or type T thermocouple probe. These instruments are designed to be compatible with ThermoWorks manufactured probes.

BATTERY REPLACEMENT

The instrument will display a low battery symbol to warn that the batteries will need changing soon. The instrument continues to measure accurately but after further usage the instrument will display ‘flat bat’ and shutdown. Replace the three AAA batteries located under the rear case half that is held in place by six screws. Check the seal for damage and carefully replace the rear case half and re-fit and tighten the screws.

MAX/MIN
Press the MAX/MIN button to display the values. The instrument retains the max/min values when switched off. To reset, press the MAX/MIN button for three seconds, ‘rst’ will be displayed.
BACKLIGHT
Press the HOLD button for two seconds.
Please Note: the backlight will not operate if the low battery symbol is being displayed. (Backlight timeout = 20 seconds).
°F/°C – Press and hold ON/OFF button for five seconds at start-up.

GUARANTEE

This instrument carries a two-year warranty against defects in either components or workmanship. During this period, products that prove to be defective will, at the discretion of ThermoWorks, be either repaired or replaced without charge. This warranty does not apply to probes, where a six-month period is offered. Full details of liability are available within ThermoWorks’ Terms & Conditions of Sale at www.thermoworks.com/product-warranty.

SPECIFICATION

Full specification details of all products are available at www.thermoworks.com.

SPECIFICATIONS (Therma 20 Plus & ThermaCheck Plus)

Temperature Range: –40 to 302°F (–39.9 to 149.9°C)
Resolution: 0.1°
Accuracy: ±0.7°F (±0.4°C) from –21.8 to 265.8°F (–29.9 to 129.9°C)
Sensor: Thermistor
Battery: 3x 1.5V AAA, 10,000 hours
Auto-Off: After 10 minutes
Display: 0.6 inches (15 mm) LCD
Dimensions: 5.6 H x 2.8 W x 1.26 D inches (141 H x 71 W x 32 D mm)
Weight: 0.49lb. (220g)
Calibration: NIST-traceable calibration certificate

SPECIFICATIONS (Therma 22 Plus)

Range (Type T T/C): –328 to 752°F (–199.9 to 400°C)
Range (Thermistor): –40 to 302°F (–39.9 to 149.9°C)
Resolution: 0.1° to 572°F (300°C) thereafter 1°
Instrument Accuracy: ±0.4°F (±0.2°C)
Accuracy (Type T T/C): ±0.9°F (±0.5°C) –58 to 302°F (–50 to 150°C)
Accuracy (Thermistor): ±0.7°F (±0.4°C) –14 to 158°F (–10 to 70°C)
Sensor: Type T thermocouple or thermistor
Battery: 3x 1.5V AAA, 10,000 hours
Display: 0.6 inches (15 mm) LCD
Dimensions: 5.6 H x 2.8 W x 1.26 D inches (141 H x 71 W x 32 D mm)
Weight: 0.49lb. (220g)
Calibration: NIST-traceable calibration certificate

INSTRUMENT RECORD CARD

	Model	Order Code
	Therma 20 Plus	232-040
	Therma 22 Plus	232-041
	ThermaCheck Plus	232-042

CALIBRATION

Serial no. _____________________________________
Calibrated by__________________ Date ____________
This instrument has been checked or calibrated against reference instrument(s) calibrated by a UKAS Accredited Calibration Laboratory.

ThermoWorks, Inc.
Utah, U.S.A.
Ph: 801-756-7705 Fax: 801-756-8948
www.thermoworks.com