DIGISYSTEM WB-500D Manuel d'instruction - Page 3
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Circuit Diagram:
Always disconnect the power cord before troubleshooting.
Caution:
Trouble
Instrument inoperative
Control head can't control
the water temperature
The key of PID controller
can't work
Temperature is not stable
PV value is not correct
DIGISYSTEM LABORATORY INSTRUMENTS INC.
Troubleshooting Guide
Cause
Power cord not connected to outlet.
Dead power output.
Current is overload, so the no fuse
breaker on the behind of themachine.
Sensor is broken
PID controller
Heater is broken
The keys has been locked
The initial setting value is not suitable
for the ambient air temperature where
the machine is located
User's calibration thermometer is
different from the factory's calibration
thermometer
Remedy
Plug instrument in..
Change to different output.
Push the button of the no fuse
breaker to reset
Replacing a sensor
Replacing a PID controller
Replacing a heater
Please refer to page 2, Other
functions 5. (c) to release the
lock status.
Please refer to page 2, Other
functions 4. to set auto-tuning
function to solve this problem.
Please refer to page 2, Other
functions 3 to adjust PV value
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REV.1-2017