Extech Instruments RH520A User Manual

8 RH520A-en-GB_v4.8 6/19
Programming the RH520A
SETTING THE TIME AND DATE
1. From the Standard View, press the SET and TIME buttons simultaneously
2. The SET indicator will appear
3. Use the UP and DOWN arrow buttons to set the time
4. Use the LEFT and RIGHT arrow buttons to step through the minutes, hours, AM/PM/24-
Hour, day, month, and year parameters
 If AM or PM is selected, the date format will be MONTH-DAY-YEAR
 If 24-hour is selected, the date format will be DAY-MONTH-YEAR
5. Press SET at any time to store the new value and revert to the Standard View
6. Press VIEW at any time to return to the Standard View without storing any changes
CLEARING THE INTERNAL MEMORY
Press the RESET button (located inside the battery compartment) to clear the display and
measurement parameters (sample rate, vertical resolution), and to reset the display.
Press the DATA RESET button (located on the back of the unit) to clear all the stored readings,
the MAX/MIN values, and the Alarm history.
SELECTING THE UNIT OF MEASURE FOR TEMPERATURE (
o
C/
o
F)
The
o
C/
o
F switch, located inside the battery compartment, is used to select the unit of measure
for temperature displays
SETTING THE VERTICAL RESOLUTION FOR THE TEMPERATURE GRAPHIC DISPLAY
1. Press the SET, TEMP, and UP arrow buttons simultaneously
2. The upper temperature range indicator will flash, and the SET icon will appear
3. Use the UP-DOWN buttons to change the upper temperature value (5° increments).
4. Press the TEMP button and the lower temperature range indicator will flash
5. Use the UP-DOWN buttons to change the lower temperature value (5° increments) Note that
the upper and lower temperature values cannot overlap, and the upper value cannot be less
than zero
6. Press the TEMP button to toggle upper and lower range values
7. Press the SET button at any time to store a value and return the instrument to the Standard
View
8. Press VIEW at any time to return to the Standard View
Important: After powering on the unit and setting the Date, Time, or Sample Rate you
MUST clear the internal data memory. If you do not clear the internal data memory
you will not get the correct Time and Date stamps (2004) with your recorded data.
Press the Data Reset button on the rear face of the meter for >4 seconds.

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