TM8400B-L-00
1 November 2004
Step 8. When the seal is broken, lift the top panel straight up carefully so as not to
damage the impeller, heater lamps or thermistors.
Step 9. Set the top panel down on an edge. DO NOT rest it on, or apply pressure
to, the thermistors which are fragile.
11.3.6. REMOVING TANK
It is recommended that this operation is done at the factory.
Step 1. Drain Tank.
Step 2. Remove top panel per Section 11.3.5.
Step 3. Remove thermoelectric cooling unit wires from wiring harness and
disconnect.
Step 4. Remove tank drain hose from valve on front panel.
Step 5. Remove 4 tank holding screws and nuts from top lip of tank.
Step 6. Pull tank straight up, ensuring thermoelectric cooling unit heatsink does
not snag on chassis or insulation.
11.4. AUTOSAL CALIBRATION
The following subsections contain a step by step procedure for testing the electronic
performance of the 8400B and calibrating the instrument. This procedure can be used to check
operation, repair circuitry or recalibrate.
The circuit references are to the pertinent schematic and assembly drawings (see Section 15).
The test equipment required for circuit checking is standard electronic instrumentation
- 4½ digit digital voltmeter
- dual trace oscilloscope
- frequency counter
- digital thermometer (Guildline 9540)
- miscellaneous hardware
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