EA25 데이터 시트보기 (PDF) - Extech Instruments Corporation.

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EA25

EasyView Digital Hygro-Thermometer Datalogger

Extech Instruments Corporation. 

Operation

Turn Power ON or OFF

1. Press the button to turn the meter on or off. The meter will perform a short self-test

when turned on.

2. The meter automatically turns off after 30 minutes of inactivity unless the MX/MN or

Datalogging modes are active.

Taking Measurements

1. Hold the probe in the air in the area to be tested. Do NOT immerse in liquid.

2. Allow adequate time for readings to stabilize.

3. Read the measurements on the LCD. The bargraph tracks the large digit display.

4. The %RH/TEMP button allows the user to choose whether the temperature or the

humidity is displayed on the large digit display.

Selecting temperature units of measure (C/F)

Press the oC/oF button momentarily to toggle the temperature units.

Maximum and Minimum recording (MX/MN)

NOTE: The Automatic Power OFF feature will be disabled while in the MX/MN mode.

The MX/MN mode allows the user to view only the highest and lowest readings while

taking measurements. (MX stands for maximum and MN for minimum).

1. Press the MX/MN button momentarily to start the elapsed timer and begin recording.

The display will now show only the highest reading (the MX icon will appear).

2. Press the MX/MN button again to view the lowest reading (MN will appear).

3. The SET button allows the user to view the elapsed time for a particular MX or MN

reading in Minutes:Seconds (59mins:59secs max) or Days:Hours (99days:24hours

max).

4. To check the highest and lowest Dew Point or Wet Bulb temperatures, use the DEW

and the WET buttons.

5. The following data displays are available in the MX/MN mode:

• Maximum and Minimum Humidity with the associated Temperature

• Maximum and Minimum Temperature with the associated Humidity

• Maximum and Minimum Dew Point temperature with the associated Temperature or

Humidity

• Maximum and Minimum Wet Bulb temperature with associated standard temperature

or humidity

6. To exit MX/MN mode, press and hold the MX/MN button (the MX/MN icons disappear).

Data Hold

Press the H button momentarily to freeze the displayed reading. The 'H' icon will appear on

the upper left-hand side of the display. Press the H button again to return to normal

operation (the 'H' hold icon will disappear).

DEW POINT and WET BULB Temperature Display

Dew Point and Wet Bulb temperatures are calculated by the meter based on

humidity/temperature measurements. To view the Dew Point or Wet Bulb temperatures,

press the DEW or WET button momentarily. The ‘DEW’ or ‘WET’ display icon will appear

on the right side of the LCD and the temperature will display on the bottom (larger) digits.

The upper (smaller) digits will display the regular temperature in oC or oF or the humidity in

RH% (use the %RH/TEMP button to toggle between the two).

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EA25 V2.1 02/06

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