Maintenance; Defects And Faults; Spare Parts - Omega CL551 User Manual

8

MAINTENANCE

The CL551 portable temperature calibrator has been factory tested and calibrated before shipment. The calibration
should be verified and re-adjusted if the instrument shows an error exceeding the declared specifications or when a
critical active or passive component is replaced (either at component level or at board level). OMEGA engineers will give
prompt support for any assistance request.
8.1

Defects and faults

N° FAULT DESCRIPTION
1 The control panel is
working normally but it
doesn't rise in temperature.
2 On pushing the main switch
the fuse blows
3 The temperature doesn't
stop at the set point value.
4 The set point value isn't the
engaged value, or the
temperature shown on the
display is different from the
actual temperature of the
block.
5 The temperature doesn't fall
to the right temperature.
6 The display shows -760°C
and the calibrator doesn't
heat.
7 The display shows 3 lines
and the calibrator doesn't
heat.
8 On connecting the electrical
cable and pushing the main
switch the calibrator doesn't
work.
8.2

Spare parts

Aluminum carrying case with cover, handle and shoulder strap
POS.
1
3
4
5
6
7
10
11
FAULTY COMPONENT
OR FUNCTION
The heater element is
cut off.
The triac is cut off.
Short circuit in the heater
element or in another part
of the circuit.
Short circuit in the triac.
The internal Pt100 or the
Microcontroller is
damaged.
The fan is damaged;
the connection is cut off.
The fan triac is cut off.
The Pt100 is open
Short circuit in the
internal Pt100.
Short circuit in the
Pt100.
The fuse blows.
The electrical cable is
cut off.
The main switch is damaged.
DESCRIPTION
Socket
Fuse
Switch Test Plug
Fan
Equalizing Block
Diode
MicroController
Controller driver
METHOD FOR REMOVAL
Replace the heater
element or the triac after
checking if they are damaged.
Replace (after check) the
heater element or the part
of the circuit which is damaged.
Replace the triac.
Check and replace the
damaged part.
Check if there is tension at
the fan ; if the circuit is
active replace the fan.
Otherwise, replace the fan
triac.
Replace Pt100.
Replace Pt100.
Check and replace the
damaged part.
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