Zero Point Adjustment - YOKOGAWA Dpharp vigilantplant EJA110A User Manual

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)
Using the integral indicator
• If the wiring system is faulty, the display stays blank.
• If the transmitter is faulty, an error code will appear
on the display according to the nature of the error.
Self-diagnostic error on
the integral indicator
(Faulty transmitter)
NOTE
If any of the error indications above appears on
the display of the integral indicator or BT200,
refer to Subsection 8.5.2 for corrective action.
Verify and Change Transmitter Parameter
Setting and Values
The following parameters are the minimum settings
required for operation. The transmitter has been
shipped with these parameters. To confirm or change
the values, see Subsection 8.3.3.
• Measuring range ....... See Subsection 8.3.3 (2)
• Output/integral indicator mode .........
• Operation mode ......... See Subsection 8.3.3 (9)
PARAM
C60:SELF CHECK
ERROR
DATA DIAG PRNT ESC
Self-diagnostic error
(Faulty transmitter)
F0702.EPS
F0703.EPS
See Subsection 8.3.3 (4)

7.2 Zero Point Adjustment

Adjust the zero point after operating preparation is
completed.
IMPORTANT
Do not turn off the power to the transmitter
immediately after a zero adjustment. Powering
off within 30 seconds after a zero adjustment will
return the adjustment back to the previous
settings.
The zero point adjustment can be made in either way:
using the zero-adjustment screw of the transmitter or
the BT200 operation.
For output signal checking, display the parameter A10:
OUTPUT (%) in the BT200.
BT200
PARAM
A10:OUTPUT(%)
0.0 %
A11:ENGR OUTPUT
A20:AMP TEMP
DATA DIAG PRNT
Zero-adjustment Screw
Using the Transmitter Zero-adjustment
Screw
Before adjusting a screw, check that the parameter
J20: EXT ZERO ADJ displays ENABLE. See
Subsection 8.3.3 (15) for the setting procedure.
Use a slotted screwdriver to turn the zero-adjustment
screw. Turn the screw clockwise to increase the output
or counterclockwise to decrease the output. The zero
point adjustment can be made with a resolution of
0.01% of the setting range. Since the degree of zero
adjustments varies with the screw turning speed, turn
the screw slowly for fine adjustment and quickly for
coarse adjustment.
7-2
7. OPERATION
Output signal (%)
display
ESC
Zero-adjustment
screw
IM 01C21B01-01E
F0704.EPS