Parr Instrument 1356 - Manual (Page 15)

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the left side panel via velcro and is located between the power supply board at the front
and the cpu board and is connected electrically to the cpu board. Remove the connector
and replace the battery.
Bucket Thermistor Replacement
Open the calorimeter cover, and turn off the instrument. Use a 5/64 Allen wrench to
remove the 12 button head screws which secure the cover to the bottom plate of the
cover assembly
Front View 1356 Calorimeter ). The screws at the rear of the cover must
be removed with the cover in a not fully pushed back position. Before removing the last
screw, grasp the cover assembly so that it does not drop and become damaged Remove
the 2 cable clips which secure the thermistor cable to the hinge assembly. With the cover
closed, remove the nut and plastic ferrule which secures the probe to the cover water
jacket assembly,
Cover Assembly 1356 . Remove the probe from cover through the cover
and jacket hinge openings. Disconnect the BNC connector from the microprocessor case
Front View 1356 Calorimeter . Reversing the above removal procedure, install the new
thermistor probe and secure to the cover with the previously removed nut and ferrule.
Controller Removal
The 1356 Calorimeter Controller can be physically separated into two halves. The upper
logic pack consists of the keyboard, and display. The lower half consists of power supply
board, microprocessor board and the I/O board.
1. Disconnect the power cord from the rear of the controller, remove the thermistor
connectors, remove the 2 orange connectors..
2.
Remove the six screws located on the display bezel.
3. Remove the bezel.
4. Separate the logic pack from the power pack by lifting the logic pack up from the
lower edge.
5.
Unplug the 4 conductor, shielded, thermistor probe cable from the logic pack at
P4. Note that the red wire of the cable goes to Pin 1 in the logic pack.
Unplug the two ribbon cables using the two ejectors on the mating sockets.
Combined Controller Removal
The 1356 Calorimeter Controller can be physically separated into two halves. The upper
logic pack consists of the keyboard, and display. This display is attached to the lower
power pack with one ribbon cable that is connected to the cpu board and a two wire cable
that is connected to the power board. Six screws are used to mate the display to the lower
unit.
1.
Disconnect the power cord and any Smart Link and/or printer cables from the rear
of the controller.
2.
Disconnect the two orange connector plugs from the side of the controller.
3. Disconnect the BNC connectors attached to the ends of the bucket and jacket
thermistor probes.