Honeywell ST 800 - 2 Application Design; 2.1 Overview; 2.2 Safety; 2.2.2 Diagnostic Messages

Revision 10 ST 800 SmartLine Pressure Transmitters User’s Manual Page 5
2 Application Design
2.1 Overview
This section discusses the considerations involved with deploying a Honeywell ST 800 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
2.2 Safety
2.2.1 Accuracy
The ST 800 SmartLine Pressure Transmitter (Transmitter) measures the gauge, differential, or
absolute pressure of a process and reports the measurement to a receiving device.
2.2.2 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 800 SmartLine Pressure Transmitter HART/DE Option User Manual, document
number 34-ST-25-38.
Table 3 - ST 800 Standard Diagnostics Messages
Critical Diagnostics (Failure
Conditions)
Non-Critical Diagnostics (Warning Conditions)
Electronic Module DAC Failure
No DAC Compensation
Loop Current Noise
Meter Body NVM Corrupt
No Factory Calibration
AO Out of Range
Config Data Corrupt
PV Out of Range
URV Set Err. Span Config
Button
Electronic Module Diag Failure
Fixed Current Mode
LRV Set Err. Zero Config
Button
Meter Body Critical Failure
Sensor Over Temperature
PILD Blockage Detected
Sensor Comm Timeout
Meter Body Excess Correct
Local Display
Low Supply Voltage
No DAC Calibration
Tamper Alarm
Meter Body Unreliable Comm