Teledyne 9110T instruction manual Removing / Replacing the Relay PCA from the Instrument

Models: 9110T

1 378
Download 378 pages 16.38 Kb
Page 315
Image 315

Model 9110T NOx Analyzer

Troubleshooting & Service

25.Leak check the system (see Section 13.3.12).

26.Turn ON the analyzer.

27.Verify the basic operation of the analyzer using the ETEST(12.7.12.2) and OTEST features (12.7.12.1) or zero and span gases, then carry out a hardware calibration of the analyzer followed by a zero/span point calibration (See Section 9.4.3.2).

12.8.6.REMOVING / REPLACING THE RELAY PCA FROM THE INSTRUMENT

This is the most commonly used version of the Relay PCA. It includes a bank of solid state AC relays. This version is installed in analyzers where components such as AC powered heaters must be turned ON & OFF.

A retainer plate is installed over the relay to keep them securely seated in their sockets.

Retainer

Mounting

Screws

AC Relay

Retainer Plate

Figure 12-10: Relay PCA with AC Relay Retainer In Place

The Relay retainer plate installed on the relay PCA covers the lower right mounting screw of the relay PCA. Therefore, when removing the relay PCA, the retainer plate must be removed first.

Teledyne Analytical Instruments

315

Page 315
Image 315
Teledyne 9110T Removing / Replacing the Relay PCA from the Instrument, Relay PCA with AC Relay Retainer In Place