D12
EX-IR
Gas Transmitter with IR Smart Sensor
Dec 2019 ( 85-0004 Rev A)
69
Figure 77. Hart Identification Menu
Item
Description
Device
This setting is read-only and displays device information used in
long-frame address commands, and by devices capable of
utilizing the transmitter’s DDL (device
description language) file.
The format of the information is, MFG_ID/DEV/REV. The MFG_ID
is 9f, and identifies Analytical Technology, Inc as the
manufacturer. DEV is 7f, and identifies the device as a D12
transmitter. REV is the revision level of the transmitter, currently
set at 2 (may increment in the future).
Poll Addr
Use this to change the polling address of the transmitter. The
default value is 0, which allows the transmitter to communicate
digitally, while preserving the function of the 4-20mA output. The
value may be set from 1 to 15, which fixes the output at 4mA, and
disables analog signaling.
Dev Id
This setting is used to form a unique identifier in the HART long
frame address. This value is set at the factory, and appears on a
label attached to the transmitter. Changing this setting is not
recommended.
Item
Description
Loop
This setting specifies the analog operating mode of the 4-20mA
output. When the HART polling address is 0, the value is Not-
Fixed
and analog signaling functions normally. When the
address is set to 1 or higher, the value is Fixed and the analog
output is fixed at 4mA. The ability to alter this behavior is
reserved for future use, and changing this setting is not
recommended.
Fixed mA
This setting provides direct access the associated HART network
management setting. The value is adjustable only when the
Loop setting is FIXED, and may be adjusted between 3.5 (4mA
on 2-wire power) and 22 mA.
Resp Preamb
This setting provides direct access to the associated HART
network management setting, which determines the number of
preamble characters (FF hex) transmitted at the beginning of
each message. The default value is 5, and may be set from 3 to
20. Changing this setting is not recommended.
Find-Me
This method places the transmitter into a mode that causes the
transmitter to respond to the Find Device command. This is
used by personnel identify transmitter in the field. The method
is describe below.
Find-Me