IM 01C25T01-01E
3-18
3. OPERATION
(3) Sensor Trim for Static Pressure
For the EJX differential transmitters, zeroing and full
sensor trim of the static pressure is performed in the
same way as with the primary process variable (PV).
Note that the static pressure sensor trim should be done
only after trimming the PV.
(4) Reset Trim Adjustment to Factory Setting
The Clear P snsr trim and Clear SP snsr trim
commands can reset the trim adjustment to the initial
calibrated values that were set. The amount of the
adjustment by the external zero-adjustment screw is
returned to the initial setting as well.
3.5.8 Trim Analog Output
Fine current output adjustment is carried out with D/A
trim or Scaled D/A trim.
• D/A Trim
D/A trim is to be carried out if the calibration digital
ammeter does not exactly read 4.000 mA and 20.000
mA with an output signal of 0% and 100%.
• Scaled D/A Trim
Scaled D/A trim is to be carried out if the output is
adjusted using a voltmeter or a meter whose scale is
0 to 100%.
1
F0330.EPS
Select the D/A trim item.
EJX:YOKOGAWA
Analog output trim
1 D/A trim
2 Scaled D/A trim
3 Clear D/A trim
HELP SAVE HOME OK
EJX:YOKOGAWA
WARN-Loop should be
removed from
automatic control
DEL SET ABORT OK
2
Press OK (F4).
EJX:YOKOGAWA
Connect reference
meter
HELP DEL ABORT OK
3
Connect the ammeter (±1µA is
measurable), and press OK (F4).
EJX:YOKOGAWA
Setting fld dev
output to 4mA
HELP ABORT
4
Press OK (F4), and the transmitter
outputs a 0% output signal.
DEL OK
(OK)
(OK)
(OK)
EJX:YOKOGAWA
Enter meter value
4.000
4.115
HELP ESC
5
Enter the read value 4.115 of the
ammeter, and press ENTER (F4).
(The output of the transmitter
changes.)
DEL ENTER
(ENTER)
‘4 . 1 1 5’
Example 1: For an adjustment using an ammeter (±1µA is
measurable)
1. Device setup
2 Diag/Service
3. Calibration
2. Analog output trim
1. D/A trim
Ammeter reading: 4.115
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