Extech Instruments RH520A User Manual

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SAMPLE RATE DISPLAY
1. Press the VIEW and the TIME buttons simultaneously from the Standard View mode
2. Both numerical displays will switch off so that the LCD can show only the sample rate in
minutes (the MIN display icon will switch on)
3. The projected TIME-DAYS that the internal memory will be full (based on the current sample
rate) is displayed in the TIME and DATE display areas
4. To change the sample rate, refer to the programming section of this manual.
5. Press the VIEW button to return to the Standard View
Factory Default Settings
 Default LCD mode: Standard View
 Temperature Graph Vertical Resolution: -20 to 40
o
C
 RH Graph Vertical Resolution: 0 to 100%
 TEMP and RH Alarm Limits: 0 (low) and 100 (high)
 Sample Rate: One (1) reading stored per minute

Extech Instruments RH520A Specifications

Temperature and Humidity

temperature range	-28 to 60 °C
temperature accuracy	±1.0 °C
humidity range	10 to 95 %
humidity accuracy	±3.0 % RH
dew point temperature	-28 to 60 °C

Power

power supply	Three ‘AA’ batteries and AC adaptor
dc voltage	5 V
battery life	4 weeks typical

Operating Environment

operating temperature range (control module and display)	0 to 50 °C
operating temperature range (sensor)	-28 to 60 °C
operating humidity (control module and display)	90 % RH max.

Memory and Data Logging

internal memory storage	49, 152 complete reading sets
sampling interval	0.1 to 199.9 minutes
alarm output current	3.4 mA @ 5 VDC

Weight and Dimensions

weight	357 g
dimensions	127 x 196 x 23 mm