User Manual

RH401 V1.4 09/04
5
Selecting temperature units of measure (C/F)
Press and hold the
o
C/
o
F button momentarily to toggle the temperature units.
Automatic Power OFF
The meter automatically shuts off after a programmed period of time.
To disable auto power off, with the meter off, press and . When “n” appears,
release the keys and the meter is now in Non-Sleep Mode.
The power off time is adjustable from 5 to 600 seconds. To change the auto power off
setting, press the key to enter the setting procedure. Use the up key and the
down key to set the value. When the desired power-off time appears in the
display, press the key again to save the parameters.
Backlight
Press the BKLT button to turn the display backlight on. The backlight will remain on until
the BKLT button is pressed again or the meter is turned off.
Error Messages
An error message will appear on the display if the meter fails an internal diagnostic test.
1. E1 (Top display): IR temperature failure. Repair/replacement is necessary.
2. E2 (Top display): IR temperature >932°F (500°C).
3. E3 (Top display): IR temperature <-40°F (-40°C).
4. E9 (Top display): Calibration error.
5. E1 (Middle display): Temperature failure. Repair/replacement is necessary.
6. E2 (Middle display): Dew Point is out of range or Repair/replacement is necessary.
7. E3 (Middle display): Air temperature is out of range or Repair/replacement is
necessary.
8. E1 (Bottom display): RH circuit error. Repair/replacement is necessary.
9. E5 (Bottom display): RH circuit error. Repair/replacement is necessary.
Setup memory
The selected display, emissivity value, auto power off time, backlight status and the laser
pointer status are stored in memory and will remain in memory as the user default setting
until reprogrammed by the user.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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