Extech Instruments EasyView Digital Hygro- and Datalogger EA20 دليل المستخدم

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User's Guide




EasyView™
Digital Hygro-Thermometer
and Datalogger

Model EA20























Introduction
Congratulations on your purchase of the Extech EasyView™ EA20 Digital Hygro-
Thermometer. This device measures Humidity, Temperature, Dew Point temperature
and Wet Bulb temperature. Advanced features include Manual Datalogging of up to 99
sets, MAX/MIN recording, Relative measurement mode, and elapsed timer. Careful use
of this meter will provi

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Specifications Function Range and Resolution Accuracy o Humidity 10.0 to 95.0% RH ±3% RH (at 25 C, 30 to 95% RH ) o ±5% RH (at 25 C, 10 to 30% RH ) o o o o Temperature -4 to 140 F (-20 to 60C) ±0.9 F (±0.5 C) Display Multifunction LCD with bargraph and status indicators Sensor Type Humidity: Precision capacitance sensor Temperature: Thermistor Response Time Humidity: 45% to 95% < 1 min; 95% to 45% < 3 min. o Temperature: Approx. 2 seconds for a 10 C change Sampling Rate 2 times per

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Operation NOTE: Do not immerse the probe in liquid; it is intended for use in air only. Turn Power ON or OFF Press the button to turn power on or off. The meter will perform a short self-test when turned on. Taking measurements 1. Hold the probe in the area to be tested. 2. Allow adequate time for readings to stabilize. 3. Read the humidity and temperature on the LCD. The %RH/TEMP button allows the user to choose whether the temperature or the humidity is displayed on the larger

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Manual Datalogging Clearing The Memory 1. Press the button to power off the meter. 2. Press and hold down the MEM key, then press the key to power on the meter. The display will show “CLr” indicating that the memory has been erased. Entering A Reading 1. Press the MEM key to enter a reading. The display will momentarily show an “M” and the memory location number from 1 to 99. 2. When the memory is full, the display will show “FULL”. Data Recall 1. Press the “READ” ke

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Calibration and Repair Services Extech offers complete repair and calibration services for all of the products we sell. For periodic calibration, NIST certification or repair of this Extech product, call customer service for details on services available. Extech recommends that calibration be performed on an annual basis to ensure calibration integrity. Warranty EXTECH INSTRUMENTS CORPORATION warrants the basic instrument to be free of defects in parts and workmanship for one year from