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44533

更新时间: 2024-01-16 22:33:20
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EXTECH 时钟
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描述
Humidity / Temperature Clock

44533 数据手册

  
User's Guide  
Humidity / Temperature Clock  
Model 44533  
Introduction  
Congratulations on your purchase of the Extech Humidity /  
Temperature Clock. This Clock displays Time,  
Temperature, and % Relative Humidity simultaneously.  
Proper care and use of this device will provide years of  
reliable service.  
Operation  
1. Insert one 1.5V 'AA' battery (alkaline batteries are  
recommended) in the rear battery compartment.  
Ensure that the (+) positive and (-) minus terminals of  
the battery match the positive and negative symbols  
on the clock's battery compartment. Battery life is  
typically one year.  
2. Set the clock hands by rotating the rear knob on the battery compartment.  
3. Hang clock in desired location.  
Description  
1.  
2.  
3.  
4.  
5.  
Hanger  
Temperature adjust  
Time adjust  
Battery  
1
2
3
4
5
RH adjust  
Specifications  
Time  
Temperature  
12 hour; ± 30 secs per month  
-40 to 120oF(-40 to 50oC); ± 5oF (± 3oC)  
Relative Humidity 0 to 100% RH; ± 8%  
Calibration  
NOTE: The Clock is shipped calibrated. Calibration procedures should only be performed if necessary:  
Thermometer Calibration  
The built-in thermometer is very sensitive to changes in air temperature and can be calibrated as follows:  
1.  
2.  
3.  
Place the clock in a test area where the temperature is known so that you can set the Model 44533 clock  
temperature to match the test area temperature.  
Through the adjustment slot on the rear of the clock, gently slide the adjust bar until temperature reading matches  
the test area temperature.  
Allow the clock to remain in the test area for 90 minutes to ensure that the clock temperature accurately matches the  
test area after stabilizing. Adjust again if necessary.  
Relative Humidity Calibration  
The built-in Relative Humidity sensor measures indoor relative humidity only. Humidity meters respond slowly to changes in air  
moisture, when conditions change abruptly it may take up to an hour for the meter to display accurate Relative Humidity. Follow  
these steps to calibrate humidity:  
1. Wrap the clock in a moist piece of linen or cloth for 1 hour.  
2. The humidity pointer should read 94 to 96% after 1 hour.  
3. Through the adjustment slot on the rear of the clock, gently slide the adjust bar until %RH reading matches the test  
area RCH.opyright © 2002 Extech Instruments Corporation. All rights reserved  
including the right of reproduction in whole or in part in any form.  
www.extech.com support@extech.com  

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