ATI Model F12/D Gas Transmitter Part 4 – Operation
46
O&M Manual (Rev-H)
Auto-test History Menu
The Auto-test History Menu provides a summary of passes, failures, and
retries, which are maintained in the sensor memory. Three attempts are
made before a failure is recorded. The total number of tests is the sum of
the passes and failures, and the number of gas generations is the sum of all
three counts. Setting Reset to “Yes” clears all counts to zero, which is not
normally recommended.
Figure 57. Auto-test History Menu
Gas Generator Display
Figure 58. Gas Generator Display
Auto-test Exceptions
Auto-test will not start if any of the following conditions are present. Furthermore, Auto-test is immediately
aborted when any of the critical exceptions are detected.
Non-critical Exceptions
The sensor is warming up (animated hour glass visible on main display).
The gas concentration is greater than 10% of the sensor range.
Auto-test has already been started (manually).
Critical Exceptions
Gas generator is missing, or is not compatible with the sensor type or range.
Gas alarm is active or being tested.
The trouble alarm is active or a fault is detected.
Auto-test Status Display
Figure 59. Auto-test Status Display
When Auto-test starts, the Auto-test Status Display Sequence appears. This happens automatically from
the Main Display (pg 34), or by setting Status= START on the Auto-test Menu (see pg 44). Figure 60,
below, illustrates the appearance of the Auto-test Status Display Sequence as Auto-test sequences During
Auto-test, alarms are inhibited, and the 4-20mA output is fixed (usually at 4mA, however, see Auto-test
Setup Options Menu and Figure 85. 4-20mA Menu). This condition continues for up to 10 minutes after
the gas-generation ends, during the recovery period. If a significant gas leak occurs during this time (50%
or more of the sensor range), Auto-test is aborted, alarm inhibit is cleared, and the 4-20mA operation reverts
to normal.
Name of gas generated and maximum (compatible) sensor range.
Generator use in units of mAH (milliamp-hours)
Change in concentration required to pass Auto-test (same as Pass value
in Figure 54), and current applied to generator
(or if problem detected: Wrong Gas Type, Under-range)
Change the Auto-test state to STOP, READY, OFF (see Status in
Figure 53 on pg 44)
100 PPM H2S
0.07 mAH Used
>Menu>Setup>Auto-T>GasGen
Failures= 1
Retries= 2
Auto-test
►GENERATE 05:00
Reading= 0PPM
PassVal= 5PPM
To Next Page
Loading...
Need help?
General