User's Guide Humidity / Temperature Clock
Contents
1. EXTECH INSTRUMENTS 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 Specifications Time Temperature 40 to 120 F 40 to 50 C 5 F 3 C Relative Humidity 0 to 100 RH 8 Description 1 Hanger 2 Temperature adjust 3 Time adjust 4 Battery 5 RH adjust 12 hour 30 secs per month 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 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 ba2. r 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 2 3 Wrap the clock in a moist piece of linen or cloth for 1 hour The humidity pointer should read 94 to 96 after 1 hour Through the adjustment slot on the rear of the clock gently slide the adjust bar until RH reading matches the test area RH Copyright 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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