Cleaning - Teledyne 2000A-EU Operating Instructions Manual

5 Maintenance
d. The Heater is fastened to the Heater Block by a set screw as well
as the silicone sealing compound. The Thermistor is fastened
only by the silicone sealer.
(1) To remove the Heater, use a
Thermistor set screw. Then, grasp BOTH Heater wires
firmly, and pull the Heater slowly out of the Heater Block,
breaking the silicone seal. Do not allow any foreign matter to
enter the empty duct.
(2) To remove the Thermistor, grasp BOTH Thermistor wires
firmly, and pull the Thermistor slowly out of the Heater
Block, breaking the silicone seal. Do not allow any foreign
matter to enter the empty duct.
e. Undo the cable lacing and separate the Heater/Thermistor wires.
Then, disconnect the wires from TS1 on the Temperature Control
Board. (See Figures 5-4 and 5-7.)
5.6.4 Replacing the Heater and/or Thermocouple
a. To replace the Heater and/or Thermocouple, coat the new
element with silicone sealing compound, and insert it into the
duct.
CAUTION: The larger duct is for the Heater element, and the
smaller duct is for the Thermocouple.
b. Enough sealing compound should be on the element to spill over
and seal around the wire where it enters the duct. Smooth the
outer seal and remove any excess.
c. Reassemble the Cell Compartment by reversing the procedure in
section 5.6.3. Then relace the cabling.
d. Reinstall the Assembled Cell Compartment by reversing the
procedure in section 5.6.1. Then reconnect the wires to TS1 on
the Temperature Control board.
5.7

Cleaning

If instrument is unmounted at time of cleaning, disconnect the instru-
ment from the power source. Close and latch the front-panel access door.
Clean outside surfaces with a soft cloth dampened slightly with plain clean
water. Do not use any harsh solvents such as paint thinner or benzene.
5-8
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Teledyne Analytical Instruments
Allen wrench to loosen the
16
Model 2000A-EU