TASI621 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

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: 16cm high x 6.5cm wide x 3.5cm thick.

Teans TASI621 digital temperature and humidity meter weight: about 320 grams (including battery and extension rod).

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. (this induction

The device is not affected by condensation of water and is effective for most vapors

immunity)

Test range: 0% to 100% RH

Resolution: 0.1%RH

Accuracy:

±2.5%RH (10%RH to 90%RH)@25°C

±5.0%RH (<10%RH, >90%RH)@25°C

The time required for the sensor to respond to 90% of the humidity range to be measured:

About 60 seconds.

Sensor hysteresis (humidity change from 10%RH to 90%RH

Back to 10%RH): ±1.0%RH.

Influence of sensor temperature: within 0°C to 50°C, almost no influence.

Operating Instructions

switch

APO: automatic power switch When the power switch is turned to the "APO" position, the symbol "APO" will appear on the LCD. If the thermometer and humidity meter , the power will be turned off automatically. When the automatic power is turned off, you need to turn the switch to "OFF", then turn to "APO" or "ON" to turn on the power. When entering "RECORD" mode, "APO" does not work. When the temperature and humidity meter needs to be used for a long time, the switch can be turned to the "ON" position, so that the "APO" will not act.

HOLD: read value lock function

Press the "HOLD" key to enable or disable the reading value hold function. When this function is selected, the reading value will be locked, and the measurement function will be stopped, and the "HOLD" symbol will appear on the display.

MAX/MIN: Maximum and minimum absolute value reading recording function Press the "MAX/MIN" key to enter the reading lock function, that is, enter "maximum and minimum absolute value recording" function. In this mode, the functions of "APO", "°C/°F" and "Unit" are disabled. Press the "MAX/MIN" button maximum valuecontinuously -minimum value" and "average value", these four functions can be recorded cyclically. If the "HOLD" key is pressed, the reading will stop recording and the reading will be frozen until the "HOLD" key is pressed again to record again . In order to prevent these recorded readings from being lost inadvertently , it is necessary to keep pressing the "MAX/MIN" key for 2 seconds before leaving this function .

°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

水蒸气、水泼溅、滴水或其它凝结(非水凝结)到感应器上均会影响。然而重复性地及长期安定性的如此，并不会损伤感应器。

․污染

污染空气中有灰尘及测试环境中有粉末物质时，更好使用相关的过濾网，可以大部份避免并解决污染问题。但过濾网需要According to污染程度大小而定期性地清洗或更换过濾网，才不影响温湿度之测量及伤及感应器。

维护事项

电池更换

1.显示器上如有“ ”符号出现时，表示电池电力不足，敬请更换9V电池，以维测试准确性。

2.将电池盖之二只螺丝松離，打开电池盖换上一只新9V电池于电池扣上。

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.