EIUK PTB 600 - Typical Faults

PTB600-MAN-V10.4 PTB 600 Instruction Manual
18
9 - TYPICAL FAULTS
Before carrying out these operations the instrument must be disconnect from the electricity supply; the
equaliser block must be at ambient temperature.
N°
FAULT DESCRIPTION FAULTY COMPONENT OR
FUNCTION
METHOD FOR REMOVAL
1 The calibrator does not work
when the power cable is
connected and the main switch is
turned on.
- The fuse (3) is cut off.
- The power cable is cut off.
- The main switch is faulty.
- Replace the fuses.
- Replace the power cable with
a similar one.
- Replace the cup socket (1-3)
2 The fuses (3) are triggered when
the power cable is connected
and the main switch is turned on.
- The power card is faulty. - Replace the power card.
3 The control panel is working
properly but the temperature
does not increase.
-
- The thermoregulator (7) is
faulty.
- The static relay on the supply
card (11) is faulty.
- The heating element is cut
off.
- The safety thermostat (10)
has been triggered.
- Replace the supply card.
- Replace the thermoregulator.
- Replace the heating resistor
- Reset the thermostat (ref. to
6.2.8)
4 The display indicates a different
temperature from the one
measured in the block.
- The probe (9) is faulty.
- The thermo regulator (7) is
faulty.
- Replace the probe.
- Replace the thermo regulator.
5 The temperature does not stop
at the value of the point that has
been set.
- The supply card (11) is faulty. - Replace the supply card.
6 The temperature does not
decrease to the set value as
quickly as it should.
- The thermo regulator (7) is
faulty.
- The cooling fan (6) is faulty.
- Replace the thermo regulator.
- Replace the fan
7 The display indicates
“Overrange” or RTD failure
- The control probe (9) is cut off
or is in short circuit.
- The thermo regulator (7) is
faulty.
- Replace the thermocouple.
- Replace the thermo regulator