Vigilantplant TDLS8000, User Manual

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<9. Inspection and Maintenance>
9-14
IM 11Y01D01-01EN
9.2.4 Time Chart
The valve operation during manual online 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 Figure 9.6, 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.
Operator HART/HMI screen Valve1 Valve2
AO/DO
mode
[Screen operation] Start online validation 1
OFF
OFF Normal output
[Manual valve operation] Purge with check gas
Check gas purging
ON OFF
Cal/Val
(Wait for the gas concentration to stabilize.)
[Screen operation] Proceed to the next step
[Manual valve operation] Discharge check gas
Check gas
discharging
OFF OFF
(Wait for the gas concentration to stabilize.)
[Screen operation] Touch Execute
Validation result Normal output
Time
Figure 9.6 Valve and AO/DO output for manual online validation 1
Operator
HART/HMI screen Valve1 Valve2
AO/DO
mode
[Screen operation] Start online validation 2
OFF
OFF Normal output
[Manual valve operation] Purge with check gas
Check gas purging
ON ON
Cal/Val
(Wait for the gas concentration to stabilize.)
[Screen operation] Proceed to the next step
[Manual valve operation] Discharge check gas
Check gas
discharging
OFF OFF
(Wait for the gas concentration to stabilize.)
[Screen operation] Touch Execute
Validation result Normal output
Time
Figure 9.7 Valve and AO/DO output for manual online validation 2
If the initial stream is set to Stream1 in a piping arrangement with process gas switching, the
valve state transition is different as shown below. For details, see section 9.2.1.
Operator Valve1 Valve2
[Screen operation] Start online validation 2 OFF OFF
[Manual valve operation] Purge with check gas OFF ON
[Manual valve operation] Discharge check gas OFF OFF
9.3 Mounting on a Calibration Cell
Before performing offline validation, zero calibration, or span calibration, you usually need
to remove the LU and SCU from the process interface and mount them on a calibration cell.
However, if the TDLS8000 is mounted on a flow cell, the gas flowing through the flow cell can be
switched from the process gas making it possible to perform offline validation, zero calibration,
and span calibration without removing the TDLS8000 from the flow cell.
3rd Edition: Jun. 10, 2016-00