Gas Flow Problems - Teledyne T200H User Manual

Teledyne API - Model T200H/T200M Operation Manual
SAMPLE A1:NXCNC1=100PPM
< TST TST > CAL
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG ALRM
SETUP X.X ENTER PASSWORD:818
8 1 8
DIAG SIGNAL I/O
NEXT

7.2. GAS FLOW PROBLEMS

07270D DCN7141
NOX=XXX.X
SETUP
MORE EXIT
EXIT
ENTR EXIT
ENTR EXIT
The T200H/M has two main flow paths, the sample flow and the flow of the ozone
supply air. With zero/span valve option installed, there is a third (zero air) and a fourth
(span gas) flow path, but either one of those is only controlled by critical flow orifices
and not displayed on the front panel or stored to the DAS. The full flow diagrams of the
standard configuration and with options installed (Appendix D, document 04574) help in
trouble-shooting flow problems. In general, flow problems can be divided into three
categories:
•
Flow is too high
•
Flow is greater than zero, but is too low, and/or unstable
•
Flow is zero (no flow)
When troubleshooting flow problems, it is essential to confirm the actual flow rate
without relying on the analyzer's flow display. The use of an independent, external flow
meter to perform a flow check as described in Section 4.13.7.5 is essential.
The flow diagrams found in a variety locations within this manual depicting the T200H
and T200M in their standard configuration and with options installed can help in
trouble-shooting flow problems.
Sections 11.2.1 (T200H) and 11.2.2 (T200M)
DIAG I/O 0) EXT_ZERO_CAL =OFF
NEXT JUMP
DIAG I/O JUMP TO:0
0 0
DIAG I/O JUMP TO:25
0 7
DIAG AIO 07) CAL_LED=ON
PREV NEXT JUMP
Toggle to turn the
CAL LED ON/OFF
For your convenience they are collected here in
Troubleshooting & Service
ENTR EXIT
ENTR EXIT
Enter 07 to Jump
to Signal 7:
(CAL_LED)
ENTR EXIT
ON PRNT EXIT
See Menu Tree
A-6 in Appendix
A.1 for a list of
I/O Signals
223