Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 106)

IM 11M12A01-03E 7-14
7.10.2 Checking Calibration Contact Output
The calibration contacts are used for solenoid valve drive signals for the ZR40H
Automatic Calibration Unit. When using the ZR40H Automatic Calibration Unit, use the
calibration contact output to check that the wiring connections have been properly
completed and check equipment operation.
(1) Referring to Section 7.10.1, display the contact check display.
(2) Select the Calibration contacts to display the panel display as Figure 7.15.3 shows.
(3) Perform the same action as in the previous section to cause the zero-gas and span-gas
contacts to act; this will help check the automatic calibration unit and wiring connec-
tions.
Zero gas contact : Open
᭜
Span gas contact : Open
Enter
Calibration contacts
F7.15.3E.EPS
Figure 7.15.3 Calibration Contact Check Display
Tip
“Open” and “Closed” displayed on the Calibration contact display indicate actions of
drive contacts and are opposite to the valve open and close actions. If Open is displayed
on the Calibration contact display, no calibration gas flows. If Closed is displayed on
that display, calibration gas flows.
7.10.3 Checking Input Contacts
(1) Follow the previous section to display the contact check display.
(2) Display the Input contacts as Figure 7.15.4 shows. The “Open” or “Closed” on this
display shows the current contact input terminal status, and the display changes
according to the contact status. This enables you to check that the wiring connections
have been properly completed.
Input contact 1 : Open
Input contact 2 : Open
Enter
Input contacts
F7.15.4E.EPS
Figure 7.15.4 Input Contact Check Display