Tc1 And Tc2 Gauge Replacement And Calibration; Replacement Of The Tc1 Gauge In The Main Valve Block Assembly - Agilent Technologies 947 Betriebs- Und Servicehandbuch

Models 947, 948 and 960 Leak Detectors Operations and Service Manual

4.2.8 TC1 and TC2 Gauge Replacement and Calibration

4.2.8.1 Replacement of the TC1 Gauge in the Main Valve Block Assembly

Figure 4-10 shows the valve block removed from the system.
To replace the TC1 gauge in the Main Valve Block Assembly (MVBA):
1. Press the VENT button on the front panel to vent the leak detector.
2. Disconnect the mains power supply and make sure all pumps are off.
3. Grasp the plug and remove the plug and the thermocouple gauge
block (Figure 4-10).
4. Disconnect the plug from the thermocouple gauge.
5. Remove the O-ring
4-26
It is not necessary to remove the valve block to replace
NOTE
the TC1 thermocouple gauge.
and backing ring
Figure 4-10 TC1 Gauge in the MVBA
from the thermocouple gauge (Figure 4-10).
from the valve