Extech Instruments RH520A User Manual

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USING THE CLOCK TO SORT THROUGH STORED READINGS
1. Press the TIME button in the Standard View mode
2. Use the ARROW buttons to select the time of day.
3. The temperature and humidity readings for the selected Time will display.
4. Press VIEW to return to the Standard View.
DEW POINT DISPLAY
Press the TEMP and the RH buttons simultaneously to view the Dew Point reading. The DEW
POINT display icon will switch on above the temperature. See the diagram below. Press VIEW to
return to the standard view mode.

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