Vigilantplant TDLS8000, User Manual

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<9. Inspection and Maintenance>
9-27
IM 11Y01D01-01EN
If you want to switch the zero calibration gas stream through automatic valve control using the
TDLS8000 SV terminal, you need to set the TDLS8000 valve usage to Cal/Val. For details on
valve usage, see “6.8.2 Valve Usage Setting”.
9.5.2 Configuration
Zero calibration configuration menu:
[HART] “Detailed setup>>Calibration>>Zero calibration”
[YH8000] “ >>Configuration>Calibration>>Zero Calibration”
The setup parameters required to manually execute zero calibration are indicated for each of the
above submenus (tabs on the YH8000).
l
Valve
Parameter name
(HART)
Description
Z-cal auto vlv man Selects whether to enable automatic valve control through the SV terminal during
manual zero calibration execution.
Z-cal gas purg time For automatic execution. Set these when performing automatic execution (see section
9.8.2).
Z-cal prc purg time
l
Auto time
For automatic execution. Set this when performing automatic execution (see “9.8.2
Configuration”).
9.5.3 Execution
Before starting zero calibration, check that the piping and zero calibration settings are correct.
Execution menu path:
[HART] “Diagnosis/Service>>Calibration>>Manual>>Manual zero cal”
[YH8000] “ >>Execution>>Calibration>>Manual>>Zero Calibration”
(1) Starting zero calibration
On HART or YH8000, open the above menu, and start zero calibration. First, a message
asking you to execute zero calibration carefully will appear.*1 Next, if automatic valve control
is enabled, a message stating that the valves will be automatically controlled will appear.*2
In this case, you do not need to manually control the valves during zero calibration.
(2) Purging with zero calibration gas
An instruction to purge the calibration cell with zero calibration gas will appear.*3 If
automatic valve control is disabled, manually control the valves to purge the calibration
cell with the zero calibration 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 (10 minutes as a guideline,
at least 1 minute) with the validation cell filled with the zero calibration gas. Then, execute
calibration.
(3) Checking the zero calibration result
The result of calibration is displayed as “successful” or “failed.” After checking the result,
proceed to the next screen to start purging with the span calibration gas or process gas. Or
select Retry to return to (2) and execute calibration again.
(4) Purging with process gas
3rd Edition: Jun. 10, 2016-00