Instruction Manual

Trident Model PD765 Universal Input Meter Instruction Manual
69
Troubleshooting Tips
Symptom Check/Action
No display at all
Check power at power connector
Not able to change setup or pro-
gramming, LoCd is displayed
Meter is locked, enter correct four-digit
password to unlock
Meter displays error message
during calibration (err)
Check:
1. Signal connections
2. Input selected in Setup menu
3. Minimum input span requirements
Meter displays
• open
• 9999
• -1999
• Displays negative number,
not responding to RTD.
Check:
1. Input selected in Setup menu
2. TC/RTD Switch position
3. Corresponding signal at Signal
connector
Display alternates between
1. Hi and a number
2. Lo and a number
Press Menu to exit Max/Min
display readings.
Display response is too slow
Check filter and bypass values
Inaccurate temperature reading
Check:
1. Temperature units (°F or °C)
2. TC type or RTD curve selected
3. Offset adjustment
4. TC wire used
5. Calibration
If the display locks up or the meter
does not respond at all
Cycle the power to restart the
microprocessor.
Relay operation is reversed
Check:
1. Fail-safe in Setup menu
2. Wiring of relay contacts
Relay and status LED do not
respond to signal
Check:
1. Relay action in Setup menu
2. Set and reset points
Meter not communicating with
MeterView
®
or other programs
Check:
1. Serial adapter and cable
2. Serial protocol selected
3. Meter address and baud rate
4. MeterView address and baud rate
Other symptoms not described
above
Call Technical Support for
assistance.