Delta-T HH2, User Manual

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Technical Reference Moisture Meter User Manual 4.0
Troubleshooting
See also: Error Messages on page 92.
Problems
To Cold Boot the HH2
1. Disconnect the battery.
2. Short out the battery connection terminals with a metal object, e.g. a screwdriver
blade.
3. Reconnect the battery: snap the connector in place in a single continuous action.
4. While doing so, observe the display and ensure that:
a. the entire display blacks out
b. no error messages are displayed
c. the title screen 'Delta-T Devices Moisture Meter' is displayed.
PC Communications Problems
Check that the meter is showing:
Connecting
to PC
..to indicate that it is ready to receive PC requests.
Is the RS232 cable correctly fitted
between the PC and HH2? Check that the cable
connectors fit tightly. There may be problems with the 9-25 D adaptor at the HH2 end.
You may have to try swapping with other cables or adaptors.
Are you using the right COM port ? Check which serial port is used on the PC.
Check that the HH2Read software is set to use that COM port.
Have you got the right type of RS232 cable ? (Delta-T Sales Code HHRS2).
The normal RS232 cable has female connectors at each end (and has crossed over
lines between some pins). Do not confuse these with RS232 modem cables. Modem
cables have male and female connectors (and are wired straight through).
WET sensor will not read
(Common with WET kit users) The HH2 battery runs low and when it is changed, it is
no longer possible to read the WET sensor. This can occur if the HH2 has resets
itself. This can occur if you short the two battery terminal together.
Solution: Reinstall the WET sensor calibration file into to the HH2.
See Install WET Sensor Calibration on page 41.
WET sensor will not read certain substrates.
Your HH2 may need the WET substrate calibrations upgrade.
See Install WET Sensor Calibration on page 41.