Error Messages - Extech Instruments AN310-NIST User Manual

Error Messages
Error codes and solutions
Air Temperature
E02: Temperature reading is lower than the low range limit. Place the meter in room
temperature for 30 minutes. If E02 continues, send the unit to Extech for repair.
E03: Temperature exceeds the high range limit. Place the meter in room temperature for 30
minutes. If E03 continues to appear, send the unit to Extech for repair.
E31: The A‐to‐D converter requires replacing. Send the meter to Extech Instruments for repair.
Relative Humidity (RH)
E04: Temperature error corrupted the humidity reading. Check the temperature error solution
section.
E11: RH calibration error. Send to Extech Instruments for repair.
E33: RH measurement circuit error. Send to Extech Instruments for repair.
Dew Point (DP) and Wet Bulb (WBT) Temperature
E04: Temperature or RH error. Check temperature or RH error solutions.
Air velocity
E03: Velocity exceeds the high range limit. Test the meter using an air velocity that is known
to be within the specified range limits. Send the unit to Extech for repair if the E03 error
message persists.
Air volume
E03: Reading exceeds the meter's display limit. Check that the AREA setting is correct in the
Setup Mode.
E04: Air velocity error. Return meter to Extech for repair.
Other Errors
E32: Memory IC error. Reboot the meter and check it again; send it to Extech Instruments for
repair if the error message persists.
No display
1. Check that the batteries are making good contact and are aligned for correct polarity.
2. Replace batteries.
Display switches OFF automatically
This symptom could be the normal 'Sleep Mode' which switches the meter OFF after 20
minutes of in‐activity. If this is not the 'Sleep Mode', check whether the low battery indicator
appears before the LCD attempts to switch ON; if yes, replace the batteries.
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