Application Design; Overview; Accuracy; Diagnostic Messages - Honeywell ST 700 User Manual

2.1 Overview

This section discusses the considerations involved with deploying a Honeywell ST 700 SmartLine
Pressure Transmitter in a process system. The following areas are covered:
•
Safety
•
Input and output data
•
Reliability
•
Environmental limits
•
Installation considerations
•
Operation and maintenance\
•
Repair and replacement

2.1.1 Accuracy

The ST 700 SmartLine Pressure Transmitter (Transmitter) measures the gauge, differential, or
absolute pressure of a process and reports the measurement to a receiving device. Measurements are
accurate up to 0.05 of the calibrated span.

2.1.2 Diagnostic Messages

Transmitter standard diagnostics are reported in the two basic categories listed in Table 3. Problems
detected as critical diagnostics drive the analog output to the programmed burnout level. Problems
detected as non-critical diagnostics may affect performance without driving the analog output to the
programmed burnout level. Informational messages (not listed in Table 3) report various Transmitter
status or setting conditions. The messages listed in Table 3 are specific to the Transmitter, exclusive
of those associated with HART and DE protocols. HART and DE diagnostic messages are listed and
described in the ST 700 SmartLine Pressure Transmitter HART/DE Option User Manual, document
number 34-ST-25-47.
Critical Diagnostics
(Failure Conditions)
Sensor Comm Timeout
Meter Body Critical Failure
Electronic Module Diag Failure
Config Data Corrupt
Meter Body NVM Corrupt
Electronic Module DAC Failure
Revision 2.0

2 Application Design

Table 3 – ST 700 Standard Diagnostics Messages
Non-Critical Diagnostics (Warning Conditions)
No DAC Compensation
No Factory Calibration
PV Out of Range
Fixed Current Mode
Sensor Over Temperature
Meter Body Excess Correct
No DAC Compensation
No Factory Calibration
Local Display
Low Supply Voltage
ST 700 Smart Pressure Transmitter User's Manual
No DAC Calibration
Tamper Alarm
Meter Body Unreliable Comm
Loop Current Noise
AO Out of Range
URV Set Error – Span Config
Button
LRV Set Error – Span Config
Button
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