Vigilantplant TDLS8000, User Manual

Page: 197 / 320

<9. Inspection and Maintenance>
9-24
IM 11Y01D01-01EN
An instruction to purge the calibration cell with check gas will appear.*2 If automatic valve
control is disabled, manually control the valves to purge the calibration cell with the check
gas. For safety verification, the standard deviation (stdev) of concentration is displayed
on HART and the concentration trend on the YH8000. Check that the concentration is
stable over a sufficient length of time (5 minutes as a guideline, at least 1 minute) with the
validation cell filled with check gas. Then, execute validation.
(3) Checking the validation result
The validation result is displayed as “PASSED” or “FAILED.” After checking the result,
proceed to the next screen to start purging with the process gas. Or select Retry to return to
(2) and execute validation again.
(4) Discharging the check gas
An instruction to discharge the check gas from the calibration cell will appear.*3 If automatic
valve control is disabled, manually control the valves to purge the calibration cell with
the process gas. For safety verification, the standard deviation (stdev) of concentration
is displayed on HART and the concentration trend on the YH8000. Check that the
concentration is stable, and proceed to the next screen.
(5) Ending validation
The TDLS8000 will exit from validation mode.
*1: [HART] Valves are automatically controlled during the validation.
[YH8000] Valve for Check Gas 1 will be opened automatically.
*2: [HART] Purge validation cell with check gas.
[YH8000] Purge flow cell with Check Gas 1.
*3: [HART] Ensure check gas is completely removed from validation cell and …
[YH8000] Remove Check Gas 1 from flow cell.
NOTE
If the validation fails, the following warning will occur. For the corrective action, see “10.2 Warning
Display and Handling”.
Alarm number Alarm name
15 Validation Error
9.4.4 Time Chart
The valve operation during manual offline validation execution and the timing when the AO/DO
output switches to Cal/Val mode are shown below. In Cal/Val mode, it is possible to hold the AO
output or specify other settings. For the AO/DO output settings during Cal/Val mode, see “6.4.2
Output Hold” and “6.5.1 DO Contact (DO-1)”.
In the following figure, Valve1 and Valve2 are switched manually by following the instructions on
the operation screen. If automatic valve control is enabled, there is no need for the operator to
switch the valves manually.
3rd Edition: Jun. 10, 2016-00