Agilent Technologies 7820A Service Manual

120
Agilent 7820 GC Service
 One or both of the heaters or sensors are defective.
 The actual temperature reading on the display of the heaters
is cycling more than 1 °C.
Materials needed
 G1535-60610 Heater/Sensor assembly with short lead for the
emissions block assembly.
 G1535-60620 Heater/Sensor assembly with long lead for the
transfer line.
Procedure
1 Turn off the flame.
Turn off the GC.
Remove the vent assembly and cover.
Put on an ESD wrist strap. Remove the right-side cover to
access the GC electronics. Disconnect the heater/sensor leads
from the auxiliary heater board and the connectors above the
main board.
Carefully pull the cables up onto the top of the GC.
Transfer line
1 Use a Torx T-10 driver to remove the screw and retainer clip
holding the lower heater/sensor assembly. Remove the
heater and sensor from the transfer line.
Remove the protective cap from the temperature sensor of the
heater/sensor assembly with the short cable.
Insert the heater and sensor into the transfer line. Make sure the
sensor is seated at the bottom of the hole. If not, the AUX
temperature will wander above and below the detector setpoint.

Agilent Technologies 7820A Specifications

General

Brand	Agilent Technologies
Model	7820A
Category	Laboratory Equipment
Language	English