Yokogawa EJA115 - Manual (Page 38)

IM 01C22K01-01E 7-8
7. OPERATION
6) Press the range-setting push-button. The integral
indicator then displays “HSET.”
7) Apply a pressure of 20 kPa to the transmitter. (Note 1)
8) Turn the external zero-adjustment screw in the
desired direction. The integral indicator displays the
output signal in %.
(Note 2)
9) Adjust the output signal to 100% (5 V DC) by
rotating the external zero-adjustment screw. Doing
so completes the HRV setting.
10) Press the range-setting push-button. The transmitter
then switches back to the normal operation mode
with the measurement range of 0 to 20 kPa.
Note 1: Wait until the pressure inside the pressure-detector section
has stabilized before proceeding to the next step.
Note 2: If the pressure applied to the transmitter exceeds the previous
LRV (or HRV), the integral indicator may display error
number “Er.07” (In this case, the output signal percent and
“Er.07” are displayed alternately every two seconds).
Although “Er.07” is displayed, you may proceed to the next
step. However, should any other error number be displayed,
take the appropriate measure in reference to Subsection
8.5.2, “Errors and Countermeasures.”
IMPORTANT
• Do not turn off the power to the transmitter
immediately after completion of the change in
the LRV and/or HRV setting(s). Note that
powering off within thirty seconds after setting
will cause a return to the previous settings.
• Changing LRV automatically changes HRV to
the following value.
HRV = previous HRV + (new LRV – previous LRV)
• If the range-setting push-button and external
zero-adjustment screw are not touched during a
range-change operation, the transmitter auto-
matically switches back to the normal operation
mode.
F0712.EPS
Integral indicator
Range-setting switch
(Push-button)
Note : Use a thin bar which
has a blunt tip, e.g.,
a hexagonal wrench,
to press the range-
setting push-button
Figure 7.7 Range-setting Switch