GE Druck DPI 620-IS, User Manual

Page: 72 / 98

Issue 1
8-6 HART
®
device operations K0460 - [EN] English
mA
A
n
a
l
o
g
t
r
i
m
•
Type the Analogue value of Primary Variable mA
current (actual calibrated value) into the box
using the key-pad and then press Set. Repeat
this process with 20 mA selected. This will
accurately calibrate the transmitter’s output 4
to 20 mA loop current.
Sensor Trim
•
Using the DPI 620-IS, a sensor trim on most Primary Variables
can be performed without having to connect any external
reference meters. If the Primary Variable is a pressure device
use the DPI 620-IS and PV 62x-IS pressure generation stations
to provide the pressure source. Alternatively, use DPI 620-IS
and MC 620-IS to accurately measure pressure.
•
Navigate to the calibration folder and select the sensor trim
method. Follow the on-screen instructions.
• In this example a lower trim has been selected.
The DPI 620-IS is set-up to source a Primary
Variable to the transmitter. CH1 has been
configured to output 0°C. This can be done by
selecting the Switch App button at the bottom
of the method window and configuring the DPI
620-IS to simulate an RTD at 0°C. The Analogue
Value of the Primary Variable can be seen by
selecting CH1 on the drop-down menu.
•
Type the Analogue Value of the Primary Variable
(actual calibrated value) into the box using the
key-pad and then press Set. Repeat this
process with an upper trim value. This will
accurately calibrate the transmitter’s sensor
output.