Zero Point Adjustment - YOKOGAWA DpharpEJX vigilantplant EJX110 User Manual

Vent plug (Fill plug)
Figure 7.1b Liquid Pressure Measurement
Confirming that Transmitter is Operating
Properly
Using the BT200
• If the wiring system is faulty, 'communication error'
appears on the display.
• If the transmitter is faulty, 'SELF CHECK ERROR'
appears on the display.
communication error
Communication error
(Faulty wiring)
Figure 7.2 BT200 Display
Using the integral indicator
• If the wiring system is faulty, the display stays blank.
• If the transmitter is faulty, an error code is displayed.
Self-diagnostic error on
the integral indicator
(Faulty transmitter)
Figure 7.3 Integral Indicator with Error Code
Tap valve
Stop valve
Drain valve
F0701b.EPS
PARAM
C60:SELF CHECK
ERROR
DATA DIAG PRNT ESC
Self-diagnostic error
(Faulty transmitter)
F0702.EPS
F0703.EPS
NOTE
If any of the above errors are indicated on the
display of the integral indicator or the communi-
cator, refer to subsection 8.5.3 for the corrective
action.
Verify and Change Transmitter Parameter
Setting and Values
The parameters related to the following items are set at
factory as specified in order.
• Calibration range
• Integral indicator display
• Output mode
• Software damping (optional)
Other parameters like following are shipped with the
default setting.
• Low-cut
• Process alarm setting
• Static pressure range
• Signal characterizer
• Write protection
To confirm or change the values, see IM 01C25T01-
01E or 01C25T03-01E.

7.2 Zero Point Adjustment

After completing preparations for operating the
transmitter, adjust the zero point.
Zero point adjustment can be done by turning the
transmitter's zero-adjustment screw or by using the
communicator. This section describes the procedure for
the zero-adjustment screw. For the communicator
procedure, see the communication manual.
IMPORTANT
Do not turn off the power to the transmitter
immediately after performing a zero point adjust-
ment. Powering off within 30 seconds of per-
forming this procedure will return the zero point
to its previous setting.
NOTE
Before performing this adjustment, make sure
that the external zero adjustment function has
NOT been disabled by a parameter setting.
To check the output signal, use a digital multimeter,
calibrator, or communicator.
7-2
7. OPERATION
IM 01C25B01-01E