Revision 5.0
ST 800 Series HART/DE Option User’s Manual
Page 3
Functional Characteristics
Functionally, the Transmitter measures process pressure and outputs a signal proportional to the
measured process variable (PV). Available output communication protocols include analog 4 to 20
mA, Honeywell Digitally Enhanced (DE) protocol, HART, and FOUNDATION Fieldbus.
An optional 3-button assembly is available to set up and make adjustments to the Transmitter. In
addition, a Honeywell Multi-Communication (MC) Toolkit (not supplied with the Transmitter) can
facilitate setup and adjustment procedures. Certain adjustments can be made through an Experion
Station or a Universal Station if the Transmitter is digitally integrated with Honeywell’s Experion or
TPS/TDC 3000 control system.
1.3 Series, Model and Number
The Transmitter nameplate mounted on the top of the Electronics Housing (see Figure 2) lists the
model number, physical configuration, electronics options, accessories, certifications, and
manufacturing specialties. Figure 3 is an example of a typical Differential Pressure (DP) or Gauge
Pressure (GP) or Atmospheric Pressure (AP) Transmitter name plate. The model number format
consists of a Key Number with several table selections. The Differential Pressure (DP), Absolute
Pressure (AP), and Gauge Pressure (GP) name plates are essentially the same. However, the DP
provides one additional entry (7 vs. 6 characters) in the Meter Body Selections (Table I) to
accommodate the static pressure rating.
Figure 3 –Typical Atmospheric or Gauge Pressure Transmitter Name Plate Information
You can readily identify the series and basic Transmitter type from the third and fourth digits in the
key number. The letter in the third digit represents one of these basic transmitter types:
•
A = Absolute Pressure
•
D = Differential Pressure
•
F = Flange Mounted
•
G = Gauge Pressure
•
R = Remote Seals
For a complete selection breakdown, refer to the appropriate Specification and Model Selection
Guide provided as a separate document.
1.4 Safety Certification Information
An “approvals” name plate is located on the bottom of the Electronics Assembly; see Figure 1 for
exact location. The approvals name plate contains information and service marks that disclose the
Transmitter compliance information. Refer to Appendix C of the
ST 800 SmartLine Transmitters
User’s Manual
, document number 34-ST-25-35 for details.
