TASI620 Digital Thermohygrometer Operating Instructions

Introduction

This product is a hand-held, easy-to-use, 3 1/2-digit (1999 maximum reading), solidly designed digital temperature and humidity meter , specially designed for one-handed operation. The temperature measurement uses a thermistor as a temperature sensor, and the relative humidity measurement uses a capacitance variable polymer humidity sensor as a sensor.

General Specifications

Display: 3 1/2 digit liquid crystal display (LCD) display, the maximum reading value is 1999.

Low battery indication: When the battery voltage is lower than the normal operating voltage , the " " symbol will be displayed.

Measurement rate: 0.5 times/second.

Accuracy environment: temperature 23±5°C, relative humidity <75%RH.

Operating environment: temperature 0 to 55°C, relative humidity <75%RH,

The air flow needs to be above 3m/s.

Storage environment: temperature -20 to 55°C, relative humidity <80%RH.

(Battery must be removed from the thermo-hygrometer)

Battery: one standard 9V battery.

(NEDA 1604, IEC 6F22 006P)

Battery life: carbon-zinc battery can be used for about 200 hours

(when the display backlight is not in use)

Dimensions: 18cm high x 6.5cm wide x 3.5cm thick.

Teans TASI620 digital temperature and humidity meter weight: about 165 grams (including battery and sensor head).

Temperature specification

Temperature unit: Celsius (°C) or Fahrenheit (°F) unit display

Temperature Sensor: Thermistor

Measuring range: -20°C to 60°C, -4°F to 140°F

Resolution: 0.1°C/°F

Accuracy:

±1.0°C at -20°C to 0°C, 45°C to 60°C

±0.5°C at 0°C to 45°C

±2.0°F at -4°F to 32°F, 113°F to 140°F

±1.0°F at 32°F to 113°F

Relative Humidity Specifications

Humidity sensor:

Electronic capacitive variable polymer humidity sensor. (The sensor is not affected by condensation and is immune to most vapors )

Test range: 0% to 100% RH

Resolution: 0.1%RH

Accuracy:

±2.5％RH(10％RH至90％RH)＠25°C

±5.0％RH(<10％RH，>90％RH)＠25°C

感应器反应至欲测湿度范围90％所需时间：约60秒。

感应器迟滞现象(湿度变化自10%RH至90%RH再回到10%RH)：±1.0％RH。

感应器温度影响：0°C至50°C内，几乎不影响。

操作說明

开关

APO ：自动电源开关电源开关拨到“APO”的位置，LCD会出现“APO”的符号。超过10分钟没有使用这台温湿度计，电源将自动关闭。当自动电源关上时，需将开关转到“OFF”，再转到“APO”或“ON”即可打开电源。进入“RECORD”模式时，“APO”不动作。当温湿度计需长时间使用时，可将开关拨到“ON”的位置，如此一來，“APO”就不会动作了。

HOLD ：讀值锁定功能

按“HOLD”键可启动或关闭讀值锁定功能。当选择此功能时，讀值就会被锁住，并停止量测的功能，显示器上会出现“HOLD”符号。

MAX/MIN ：最大最小绝对值讀值记錄功能按“MAX/MIN”键可进入讀值锁定功能，即进入“最大最小绝对值记錄”功能。在这个模式下，“APO”、“°C/°F”及“单位”的功能都不能动作。連续按下“MAX/MIN”键，“最大值”，“最小值”，“最大值-最小值”及“平均值”，这四种功能能够循环记錄。若按下“HOLD”键，会停止记錄讀值，并冻结讀值，直到再一次按下“HOLD”键，才可重新记錄。为防止在无意中遗失这些已记錄的讀值，需持续按“MAX/MIN”键2秒，才可離开此功能。

°C/°F ：温度量测功能键可在摄氏温度(°C)及华氏温度(°F)做测量 。 按一下，显示“°C”；再按一下，显示“°F”。

操作程序

1.打开感应头保护盖。

2.选择“APO”或是“ON”的功能开关。

3.按下“°C/°F”键，选择需要的温度功能。

4.讀取显示器讀值即为所欲测的温度值或相对湿度值。

5. 此产品不使用时，请锁上保护盖，以延长感应器寿命，避免伤及感应器。

特殊考虑

․如要得到更为可靠的测量值前，更好能在欲测环境能达到温度及湿度均交换平衡下，再讀取讀值。

․温度测量之误差造成原因

测量时间太短、测量时有日光照射到感应器、热源輻射、墙外壁太冷、空气流动(如风扇在吹)、手或人体之輻射热量等。

․湿度测量之误差造成原因

Water vapor, water splashing, dripping water or other condensation (not water condensation) on the sensor will affect it. However, repeatability and long-term stability do not damage the sensor.

․ pollute

When there is dust in the polluted air and powdery substances in the test environment , it is better to use the relevant filter screen, which can mostly avoid and solve the pollution problem. However, the filter needs to be cleaned or replaced regularly according to the degree of pollution, so as not to affect the measurement of temperature and humidity and damage the sensor.

Maintenance

battery replacement

1. If the “ ” symbol appears on the display , it means that the battery power is insufficient. Please replace the 9V battery to maintain the accuracy of the test.

2. Loosen the two screws of the battery cover, open the battery cover and replace with a new 9V battery on the battery buckle.

3. When the thermometer and hygrometer is not in use for a long time, please take out the 9V battery from the thermometer and hygrometer, and avoid storing it in a place with high temperature and high humidity.

clean

Regularly use a soft damp cloth dipped in a neutral detergent to wipe the case or lens lightly, and do not use emery cloth or solvents with dissolving power.