Teledyne 6200E - Sulfides Analyzer - Manual (Page 240)

TROUBLESHOOTING & REPAIR Model 6200E Instruction Manual
240 M6200E Rev: A1
source of zero air or span gases or the sample gas delivery system. Check for gas flow
problems such as clogged or blocked internal/external gas lines, damaged seals, punctured
gas lines, a damaged pump diaphragm, etc.
• Follow the procedures defined in Section 11.5 for confirming that the analyzer’s basic
components are working (power supplies, CPU, relay board, keyboard, PMT cooler, etc.).
See Figure 3-8 for general layout of components and sub-assemblies in the analyzer. See
the wiring interconnect drawing and interconnect list, see Appendix D.
11.1.1. Fault Diagnosis with Warning Messages
The most common and/or serious instrument failures will result in a warning message displayed
on the front panel. Table 11-1 contains a list of warning messages, along with a list of possible
faults that might be responsible for the warning condition.
It should be noted that if more than two or three warning messages occur at the same time, it is
often an indication that some fundamental analyzer sub-system (power supply, relay board,
motherboard) has failed rather than an indication of the specific failures referenced by the
warnings. In this case, a combined-error analysis needs to be performed.
The analyzer will alert the user that a warning is active by displaying the keypad labels MSG and
CLR on the front panel and a text message in the top center line of the display as shown in this
example:
SAMPLE AZERO WARNING NOX =123.4
< TST TST > CAL MSG CLR SETUP
The analyzer will also issue a message to the serial port and cause the red FAULT LED on the front
panel to blink.
To view or clear a warning message press:
SAMPLE SYSTEM RESET NOX = XXX.X
TEST
CAL MSG CLR SETUP
If warning messages re-appear,
the cause needs to be found. Do
not repeatedly clear warnings
without corrective action.
Press CLR to clear the current
warning message.
If more than one warning is
active, the next message will
take its place.
Once the last warning has been
cleared, the analyzer returns to
SAMPLE Mode.
SAMPLE RANGE=500 PPB NOX = XXX.X
< TST TST > CAL
MSG CLR SETUP
SAMPLE SYSTEM RESET NOX = XXX.X
< TST TST > CAL
MSG CLR SETUP
In WARNING mode, >
keys replaced with TEST key.
Pressing TEST switches to
SAMPLE mode and hides warning
messages until new warning(s)
are activated.
MSG indicates that one or more
warning message are active but
hidden. Pressing MSG cycles
through warnings
In SAMPLE mode, all warning
messages are hidden, but MSG
button appears
Figure 11-1: Viewing and Clearing warning messages