INFICON Composer Gas Concentration Controller - Manual (Page 133)

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Composer Operating Manual
Chapter 6
Diagnosing Problems
6.1 Introduction
There are many built in checks and diagnostics in the firmware. There are
additional diagnostics available when using the optional Monitor software
package. Many of the operational diagnostics are indicated on the controller’s
front panel (refer to
section 4.3.5, Description and Purpose of Displays, on page
4-7 and also see section 6.5, User Diagnostics, on page 6-7 ). It is important to
know that these LEDs are operative. This can be verified when the power
switch is cycled from off to on. There is a short (approximately 2 seconds)
period when all of the LEDs are illuminated.
Similar information is available with the optional LCD DIsplay. There is a
several second period during the initial power-up period where all LCD
segments are illuminated. Occasionally verify that all segments are on by
referring to
Figure 4-3 on page 4-9 .
6.2 Failure Effects Mode Analysis (FEMA)
NOTE: In the following tables, PRT stands for Platinum Resistance
Thermometer, µP stands for microphone, and C stands for
concentration.