Ashcroft GC52 - Rangeable wet/wet Differential Pressure Transmitter User Manual
Page 16
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Ⅵ Display and analog output
Ex. Differential pressure of 8 inH
2
O
• Differential pressure display: 8.00(H
2
O)
• Analog output: 12(mA) in.H
2
O
8.00
Differential
Pressure
Analog
Display
Output
(inH
2
O)
(mA)
Output span point
18.00 ==> 20
͐
͐
8.00 ==> 12
Output zero points
–2.00
0
==>
4
Setting example 1 : Differential pressure display mode
The setting to use the differential pressure range 0 to 20in.H
2
O (“W.C.)
and to display the zero point and span point of the analog output as –2
in.H
2
O and 18 in.H
2
O respectively is as follows:
In the example the filter (moving average time) is set at 2 seconds, the
differential pressure display and the analog output are based on the
moving average equivalent to the differential pressure data per 100ms
for the past 2 seconds (20 times).
Select the filter of “2 seconds”
==> Setting item
ቢ
Select the “Differential pressure display mode”
==> Setting item
ባ
Set output zero point as “–10.0%F.S.”
==> Setting item
ቤ
Set output span point as “90.0%F.S.”
==> Setting item
ብ
11.3 Linear Display Mode (Re-scaling in arbitrary user defined units)
This mode is used for display / analog output of the scaling value
where the differential pressure is linearly converted to an arbitrary
physical quantity.
(1) Linear display
By setting the OFFSET to the minimum differential pressure P
1
and the FULL SCALE to the maximum differential pressure P
2
,
the linear display indicates the value on the line between the two
points (the maximum display span). The actual linear display
span depends on the setting of the zero point and span point of
the analog output as shown in (2) of the next page. It can display
the range of –5 to 105%F.S. of the linear display span.