Valeport Ltd © 2019
Trouble Shooting
Page 15
5. Trouble Shooting
The following table is designed to assist the user with problems commonly experienced while using the
instrument.
Symptom
Probable Cause
Remedy
No output
Incorrect comm port selected
on PC
Check comm port choice in HyperTerminal or
ROVLog
Incorrect output format
selected
Check that instrument is set to RS232 or RS485
output, as required.
Insufficient power
If running on external power, voltage too low
or external supply current limiting at switch on.
Incorrectly fitted cable
Check connections and try again.
Illegible characters
Incorrect baud rate
In RS232 mode, check instrument baud rate
and HyperTerminal or ROVLog baud rate
In RS485 mode, check instrument baud rate,
HyperTerminal or ROVLog baud rate, and KK
systems RS485 adaptor baud rates.
Spurious Readings:
Proximity of sensor to
interfering sources
Check location
Growth on sensor
Clean sensor head at regular intervals.
Most faults are due to:
1. Incorrect communications settings.
2. Incorrectly connected leads.
3. Low battery power, low external voltage, current limit on external supply.
If in any doubt about the performance of the unit, please contact the factory at the address shown on the
front page of this manual.
