PRESYS
Instruments
PCON-Y17
Page 44
2.2.4. Adjusting the Measurement Range of a HART
®
Transmitter
with Reference (CH Option)
Another way to adjust the range of the transmitter is to generate the minimum and
maximum values of the desired range in the transmitter input and to adjust these values
as minimum and maximum (set by reference).
To adjust the range of a pressure transmitter, connect the transmitter pressure
input to the output port of the Pressure Control Module. Go to the
Calibrator
option,
configure the control parameters and select the
Control
mode. Select
mA
at the
(Auxiliary) Input
and press the
Hart
button. The pressure control will work as the
standard value for the adjustment range of the instrument.
Fig. 59
- Quick HART
®
adjustment with reference
Generate pressure to the transmitter input corresponding to the lower range value
and press the
button. Transmitter will generate 4 mA to this value. Generate pressure
to the transmitter input corresponding to the upper range value and press the
button
.
The transmitter will generate 20 mA for this value.
Another way to do this adjust is to enter in the
HART
option through the
MAIN
MENU
, set the connection type, address and then press
CONNECT
. Select the
MONITOR
tab. In this screen it is shown the value of the primary variable (PV) read by
HART
®
(digital), the current that the transmitter wants to generate (
AO - DIGITAL
OUTPUT
), and the current measured by PCON-Y17 (
ANALOGIC READ
). Set the
pressure controlled pressing
OUTPUT
and adjust the transmitter range by pressing the
↓
Inf
Range
and
↑
Sup.
Range
buttons.
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