Major Mt667 Thermo Hygrometer Instruction Manual (+ PDF)

MAJOR MT667 Thermo Hygrometer 
Instruction Manual

Contents hide

5 HUMIDITY AND AIR TEMPERATURE MEASUREMENTS

6 BATTERY REPLACEMENT

7 Documents / Resources

7.1 References

8 Related Posts

INTRODUCTION

The MT667 is a digital microprocessor controlled Thermo-Hygrometer with fast response and high accuracy with Dew point, Wet bulb and Temperature measurements. The Wet Bulb mode is effectively a Digital Sling Psychrometer.

It is an ideal instrument for scores of practical applications for Laboratory, Industrial, Engineer and Professional use. This offers a wide variety of applications ranging from HVAC to laboratories, and is ideal in other industries such as computer rooms, hospitals, tobacco industry, factories and offices and general use.

The Humidity & Temperature Meter uses a humidity & temperature semiconductor sensor. This operation manual contains general information and specification.

FEATURES

Fast Response Time %RH: 10s (90% at 25°C still air)
High Accuracy
Dew Point Temperature (-30°C to 100°C)/(-22°F to 199°F)
Wet Bulb Temperature (0°C to 80°C)/(32°F to 176°F)
Resolution 0.01%RH, 0.01°C/0.01°F
Max Hold and Data Hold Function
Micro Processor-based Design
Dual Display Temperature & Humidity
Auto Power Off, Disable Sleep Mode
Back light
Mini Size

SPECIFICATIONS

Humidity / Temperature Measurement Range

Note: The measuring range is from 0% to 100%, but above 80% and below 20% the deviation is not specified.

PANEL DESCRIPTION

Humidity / Air Temperature Probe: Humidity & and Temperature Semiconductor Sensor inside.
LCD Display: 4 ½ dual digits LCD display with units of °C, °F, %RH dew point, wet bulb and low battery “BAT” MIN /MAX HOLD, indication.
MAX/ MIN Button: Press MAX/MIN button to enter MAX, MIN Recording mode (manual range only). Select the proper range before selecting MAX MIN to ensure that the MAX/MIN reading will not exceed the testing range. Press once to select MIN. Press again to select MAX. Press and hold the Button for over 2 second to turn off MAX, MIN Recording.
°C, °F, Dew Point, Wbt Select Button: Press °C, °F, Dew Point, Wbt select Button to enter select °C, °F, Dew Point, Wet Bulb Measurement.
Power ON/OFF Button: Turn the meter power ON/OFF.
HOLD /Back light Button:
Press Hold/backlight Button to enter hold function. The reading will be held when Data Hold button is pressed. Press Hold/backlight Button for over 2 seconds to turn on or off back light function.
Battery Compartment

HUMIDITY AND AIR TEMPERATURE MEASUREMENTS

Hold the probe in the area to be tested & allow adequate time for readings to stabilize.
Press °C, °F, dew point, WBT select Button to enter select °C, °F, dew point Wet Bulb Measurement.
Read the Relative Humidity and Air Temperature, dew point temperature wet bulb temperature.

NOTE: Do not immerse the probe in liquid; it is intended for use in air only.

WARNING: Don’t expose the sensor to direct sunlight (in solation).
Don’t touch or manipulate the sensor.

BATTERY REPLACEMENT

If the sign “” appears on the LCD display, it indicates that the battery should be replaced. Open the battery case and replace the depleted battery with a new battery. (1 x 9V battery NEDA 1604, 6F22 or equivalent).