ProtEX-MAX PD8-7000 Explosion-Proof Temperature Meter Instruction Manual
53
Troubleshooting Tips
Symptom
Check/Action
SafeTouch buttons do not respond
If mechanical button was pushed. The SafeTouch buttons will
be re-enabled automatically
60 seconds
after the last button
push.
If slide switch on connector board is in DISABLE position,
switch to ENABLE.
Strong direct sunlight may interfere with SafeTouch button
operation. It is recommended to operate the buttons by
standing so as to block direct sunlight.
Serial Communications Power LED
Indicator is off
1. Check modular cable connection
Check power to the device
If only the TX (or DATA IN) data status
LED is flashing when serial
communications attempted
1. Check serial cable
2. Check protocol selected on device
3. Check instrument address & baud rate
Check program address & baud rate
If both data status LEDs (TX and RX)
are off when trying to communicate
Remove all unnecessary cables and instruments from the bus.
Try getting the system to work with only one device (to ease
troubleshooting) and then expand the system one device at a
time.
Communications slow
Increase the baud rate
Random communication errors
1. Increase the TX delay time
Decrease the baud rate
Power LED is off
1. Check modular cable connection
Check power to instrument
No display at all
Check power at power connector
Not able to change setup or
programming,
Locd
is displayed
Meter is password-protected, enter correct six-digit
password to unlock
Meter displays error message during
calibration (
Error
)
Check:
1. Signal connections
2. Type and range selector switches
3. Input selected in
Setup
menu
Meter displays
1.
99999
2.
-9999
Check:
1. Input selected in
Setup
menu
2. Corresponding signal at Signal connector
Display is unstable
Check:
1. Input signal stability and value
2. Filter and bypass values (increase)
Display response is too slow
Check filter and bypass values
Display reading is not accurate
Check:
1. TC wire type
2. Input selection in
Setup
menu
Display does not respond to input
changes, reading a fixed number
Check:
1. Display assignment, it might be displaying max, min, or
set point.
Display alternates between
1.
Hi
and a number
2.
Lo
and a number
Press Menu to exit max/min display readings.
Relay operation is reversed
Check:
1. Fail-safe in
Setup
menu
2. Wiring of relay contacts
