TQC RV2100 Digital Display Thermohygrometer Instruction Manual

TQC Thermo-Hygrometer is a simple hand-held digital hygrometer. Temperature and air humidity are displayed simultaneously. Equipped with MIN/MAX memory, C°/F° selection, hold function and dew point indication.

Use safety tips

• Not suitable for exposure to sunlight or strong light

• Avoid use in high or low temperature environments

• avoid moisture

Preparation before the test

1. To obtain accurate humidity measurements, allow the instrument to stabilize in the environment for at least one minute. For better accuracy, let the air flow pass through the sensor.

2. The device can be switched between °C and °K by pressing the MODE button for three seconds.

3. Press the MODE button to change the bottom display between temperature and dew point measurements.

Specific test method

1. The display shows two values. The upper limit is relative humidity and the lower limit is temperature or dew point.

2. Press the HOLD key to freeze the display and stop the measurement. Press again to continue measuring.

3. Press the MAX/MIN button to display the value. When turned off, the instrument will retain the MAX/MIN values. To reset, press the MAX/MIN button for three seconds.

Please note

• The instrument is equipped with a backlight. Press and hold the HOLD button for two seconds to activate it. If "Lo bat" is displayed, the backlight will not work.

• The instrument will automatically shut down after 10 minutes. To disable the auto-off function, press the HOLD button while turning on the instrument.

• Do not immerse the sensor in water or any other liquid. This sensor is only suitable for air measurement.

• Do not blow into or squeeze the sensor.

• Keep the sensor away from direct sunlight and do not touch the humidity sensor.

wrong information

"Err" will appear in the display if:

• Communication with sensor failed

• Sensor is contaminated or wet

• The instrument is malfunctioning.

Replacement battery

The instrument will display "Lo Bat" to warn that the battery needs to be replaced soon. The instrument will continue to take measurements accurately, but after further use the instrument will display a "flat bat" and shut down. Replace the batteries with three AAA batteries located under the back cover and held in place with a single screw.

Maintenance

• Despite its robust design, this instrument is precision machined. Never drop or fall

• Always clean the instrument after use.

• Clean the instrument with a soft dry cloth. Never use any mechanical means such as wire brushes or sandpaper to clean the instrument. Like using aggressive cleaners, this can cause permanent damage.

• Do not use compressed air to clean the instrument.

• Always keep the instrument in its case when not in use.

• We recommend annual calibration