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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
FAULTY COMPONENT
METHOD FOR REMOVAL
OR
FUNCTION
1
The control panel is
The heater element is
Replace the heater
working normally but it
cut off.
element or the triac after
doesn't rise in temperature.
The triac is cut off.
checking if they are damaged.
2
On pushing the main switch
Short circuit in the heater
Replace (after check) the
the fuse blows
element or in another part
heater element or the part
of the circuit.
of the circuit which is damaged.
3
The temperature doesn't
Short circuit in the triac.
Replace the triac.
stop at the set point value.
4
The set point value isn't the
The internal Pt100 or the
Check and replace the
engaged value, or the
Microcontroller is
damaged part.
temperature shown on the
damaged.
display is different from the
actual temperature of the
block.
5
The temperature doesn't fall
The fan is damaged;
Check if there is tension at
to the right temperature.
the connection is cut off.
the fan ; if the circuit is
The fan triac is cut off.
active replace the fan.
Otherwise, replace the fan
triac.
6
The display shows -760°C
The Pt100 is open
Replace Pt100.
and the calibrator doesn't
Short circuit in the
heat.
internal Pt100.
7
The display shows 3 lines
Short circuit in the
Replace Pt100.
and the calibrator doesn't
Pt100.
heat.
8
On connecting the electrical
The fuse blows.
Check and replace the
cable and pushing the main
The electrical cable is
damaged part.
switch the calibrator doesn't
cut off.
work.
The main switch is damaged.
8.2 Spare
parts
Aluminum carrying case with cover, handle and shoulder strap
POS. DESCRIPTION
1
Socket
3 Fuse
4
Switch Test Plug
5 Fan
6 Equalizing
Block
7 Diode
10 MicroController
11 Controller
driver
20