Rosemount 3244MV, Справочное руководство

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Reference Manual
00809-0100-4799, Rev BA
September 2002
Model 3244MV
4-2
HARDWARE
Diagnostics
If a malfunction is suspected, despite the absence of diagnostic messages,
follow the procedures described in Table 4-1 to verify that transmitter
hardware and process connections are in good working order. Under each of
four major symptoms, specific suggestions are offered for solving problems.
Always address the most likely and easiest-to-check conditions first.
Table 4-1. Troubleshooting.
Symptom Potential Source Corrective Action
Transmitter does
not communicate
with the
Configuration
Interface Loop Wiring
• Check for adequate voltage to the transmitter.
The transmitter requires between 9.0 and 32.0 V
at the terminals to operate and provide complete
functionality
• Check for intermittent shorts, open circuits, and
multiple grounds.
High Output Sensor Input
Failure or
Connection
• Enter the transmitter test mode to isolate a
sensor failure.
• Check for a sensor open circuit.
• Verify the process variable is not out of range.
Loop Wiring
• Check for dirty or defective terminals,
interconnecting pins, or receptacles.
Power Supply
• Check for adequate voltage to the transmitter.
The transmitter requires between 9.0 and 32.0 V
at the terminals to operate and provide complete
functionality
Electronics Module
• Enter the transmitter test mode to isolate a
module failure.
• Check the sensor limits to ensure calibration
adjustments are within the sensor range.
Erratic Output Loop Wiring
• Check for adequate voltage to the transmitter.
The transmitter requires between 9.0 and 32.0 V
at the terminals to operate and provide complete
functionality
• Check for intermittent shorts, open circuits, and
multiple grounds.
Electronics Module
• Enter the transmitter test mode to isolate module
failure.
Low Output or
No Output Sensor Element
• Enter the transmitter test mode to isolate a
sensor failure.
• Verify the process variable is not out of range.
Loop Wiring
• Check for adequate voltage to the transmitter.
The transmitter requires between 9.0 and 32.0 V
at the terminals to operate and provide complete
functionality
• Check for shorts and multiple grounds.
• Check the loop impedance.
• Check wire insulation to detect possible shorts to
ground.
Electronics Module
• Check the sensor limits to ensure calibration
adjustments are within the sensor range.
• Enter the transmitter test mode to isolate an
electronics module failure.