Replacing the probe assembly – ThermoProbe TP9 User Manual
Page 5
11/2012, JK
Error Codes
ErrHI
indicates the sensor is operating above its temperature limit, the Probe Assembly is open circuited from a cut or broken
section, or the cable is not properly inserted at the circuit board terminal. The most common cause is a damaged cable.
ErrLO
indicates the sensor is operating below its temperature limit, the Probe Assembly is short circuited due to a smashed or cut
section, or the cable wire polarity is reversed at the circuit board terminal. The most common cause is a damaged cable.
nO rEAd
-the user accessed "List" or "At" before saving temperatures.
REPLACING THE PROBE ASSEMBLY
NOTES:
1) Replacement of the probe assembly requires re-calibration of the device. Replacement should only be done by experienced
personnel and if calibration equipment is available.
2) Please refer to IEC/EN 60079-19 when making the repair
3) Only use replacement probe assemblies obtained from ThermoProbe, Inc. or one of its authorized distributors with part
specifications as follows:
a) First follow REPLACING BATTERY instructions a through c to remove batteries.
b) On the circuit board push the terminals clamps down and remove the wires noting the wire lead color code arrangement.
White – positive sensor wire
Black – negative sensor wire and sheild
c) Set the cover and circuit board aside and remove the strain relief knot in cable assembly.
d) Unwrap the cable from the assembly and pull the cable free of the rubber grommet.
e) Insert the new cable wire through the rubber grommet and then pull several inches of cable slack past the grommet.
f) Tie a simple overhand knot in the cable at the grommet for strain relief and pull any slack through the grommet.
g) On the circuit board, push the terminal clamps down and insert the new wire leads making sure the black wire lead is installed in
the terminal indicated with black paint. (See Figure 1)
h) Reinstall the batteries and cover and re-spool the cable assembly.
i) Perform a calibration.
Negative Terminal
indicated by black
marking