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9. Troubleshooting/Error messages
8. Advanced Operations
This meter comes equipped with several outputs for advanced operations.
These outputs are available under the panel located at the bottom of the meter.
Serial output for temperature and humidity:
The serial output can be used to feed the TTL level signal into a microprocessor.
Analog outputs:
The meter has two analog outputs: one for relative humidity in the range of
0 to 1 V (10 mV per % RH) and one for temperature in the range of 0 to 1.25 V
(10 mV per °F). You can connect these outputs to a recorder or a controller using
2.5 mm sub-mini phone jacks.
Bottom view with cover removed,
showing output connections.
Front of meter
Serial
humidity
output
(TTL)
Analog
humidity
output
Analog
temperature
outlet
LCD
Beeping or
Indicates
Cause
Solution
Readout
flashing?
OP
Beeping
Probe incorrectly
Improper setup
Check probe
connected
or faulty wire
connection
0.0 %/
—
Probe is
Rough handling or
Replace the
99.9%
damaged
defective probe
probe
E1, E3,
Beeping
Circuit error
Various
Return meter
E4
for service
Improper cali-
Improper
Recalibrate
E2
Beeping
bration or probe
calibration or
meter or replace
is damaged
damaged probe
the probe
Reset the
E5
3 Beeps
Alarm setting is
Setting is outside of
setpoint between
unacceptable
the meter’s range
0.0 to 199.9°F or
–17.7 to 93.2°C
Normal
Flashing
Low battery
Overuse of
Replace or
display
these batteries
recharge batteries
See “Warranty” and “Return of Items” on page 24
If an error message appears in the primary display (the upper row of larger digits),
switching off the meter and switching it on again may eliminate the error message.
If error persists, or the meter shows incorrect values, return the meter.
For a complete diagram of the display, see page 4.
