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2. Selection of transmitter adjustment method
"LOCAL/COMM" Changing switch decides the method of FCX-AII transmitter adjustment. If
switch is set to “
COMM
” side, adjustment of transmitter is carried out by HHC.
This method is explained in instructions manual.
If switch is set to “
LOCAL
” side, adjustment of transmitter is carried out by
MODE
setting
switch and
DAMPING
setting switch.
This method is explain below.
3. Range change procedure
For changing the measuring range, carry out zero adjustment
fi
rst, and span adjustment
next. (If zero adjustment is performed after span adjustment, the 100% point may not be
adjusted correctly.).
There is no interference between zero adjustment and span adjustment.
3.1 Zero adjustment (Change Lower Range Value)
Zero point of the transmitter is adjustable by the external adjustment screw with the mode
setting switch set at “0” position.
(1) Check if “ZERO” is on the LCD indicator.
If not lit, set the mode setting switch to “0” position.
(2) Apply standard input pressure corresponding to new Lower
Range Value
(3) Adjust output signal to 4.00mA by turning the external ad-
justment screw
For zero suppression or elevation ranges, apply the speci
fi
ed LRV pressure in advance and
adjust the output signal to 4.00mA using the external adjustment screw.
Max span
Max span
Min span
Min span
Max Zero suppression with
Output
signal
100%
(20mA)
0%
(4mA)
0%
Input signale
%URL
+100%
-100%
Zero elevation
Zero suppression
Max Zero elevation with :
Decrease
Increase
