2-2
EN
COMMISSION: ON THE BENCH OR IN THE LOOP
Commission the Model PX2088 Smart Transmitter before or after installation.
It may be useful to commission the transmitter on the bench before
installation to ensure proper operation, to familiarize yourself with transmitter
functionality, and to avoid exposing the transmitter electronics to the plant
environment. Commissioning consists of reviewing configuration data, setting
output units, setting the 4 and 20 mA points, configuring the transmitter for any
non-standard accessories or functions, and testing the transmitter output.
Set up the Transmitter and the Communicator
To configure the transmitter on the bench, connect the transmitter and the
communicator as shown in Figure 2-1. To power the transmitter you will need a
power supply capable of providing 10.5 to 36.0 V dc and a meter to measure output
current. To enable communication, a resistance of at least 250 ohms must be present
between the communicator loop connection and the power supply. You can connect the
communicator leads at any termination point in the signal loop, but it is most
convenient to connect them to the terminals labeled
“COMM”
on the terminal block.
After you connect the bench equipment as shown in Figure 2-1, turn on the
communicator by pressing the
ON/OFF
key. The communicator will search for a
HART-compatible device and will indicate that the connection is made. If the
connection is not made, the communicator will indicate that no device was found.
FIGURE 2-1. Connecting a Communicator to a Transmitter Loop
If the communicator lacks the device driver for the PX2088 Smart, the transmitter will
be identified as “GENERIC” by the communicator. Basic configuration functions are
still possible, but many advanced configuration functions are not possible when the
communicator is in this mode. Contact Omega customers service for assistance
in obtaining the PX2088 Smart device driver for the HART Communicator.
Power
Supply
R
L
≥
250
V
The signal loop may be grounded
at any single point in the loop, or
may be left ungrounded
20
88
S-2
0
8
8
C0
2C
4690.bk : 4690.s2 Page 2 Tuesday, May 26, 1998 5:28 PM
