Emerson Rosemount 3308, Справочное руководство

Страница: 99 / 128

Reference Manual
00809-XXXX-4811, Rev AA
February 2012
7-19
Rosemount 3308
PRELIMINARY
DIAGNOSTIC
MESSAGES
Troubleshooting
If there is a malfunction despite the absence of diagnostic messages, see
Table 7-1 for information on possible causes.
Table 7-1. Troubleshooting
chart
Table 7-2. Maintenance and Troubleshooting Suggestions
Symptom Possible cause Action
Both P2 and P3 are detected but Interface
Level is reported as Not A Number (NAN)
in the waveform plot. Measurement Mode is set to “Level Only”. Set Measurement Mode to “Level and
Interface” (see “Basic Configuration” on
page 5-9).
Both Level and Interface Level are
reported as NAN. Probe is not connected. Use the command “Read Gauge Status”
and check if error “Probe Failure” is
active. If this is the case, check the probe
connection.
Both P2 and P3 are detected but the
interface level is equal to the product
Level.
• P3 is identified as a double bounce.
• P2 and P3 are very close.
Adjust thresholds T2 and T3, see
“Amplitude Threshold Settings” on
page 7-12 for more information.
P2 is detected but Level is incorrectly
reported as Full or Empty. Use the command “Read Gauge Status”
and check if the warning “Probe
Immersed” is active. If this is the case
check that:
• the transmitter is configured with
correct probe type,
• the reference pulse (P1) is below
amplitude threshold T4. If not, adjust
T4 to an appropriate value.
The reference pulse is not detected.
• The tank is full.
• The transmitter is configured with
wrong probe type.
• Amplitude Threshold T1 is not correct.
• Check the product level.
• Check that correct probe type is
configured.
• Check Amplitude Threshold T1.
Level accuracy seems off.
• Configuration error. • Check the Tank Height parameter.
• Check status information and
diagnostic information.
Integral display does not work.
• Check the display configuration.
• Check Display connection.
Symptom Corrective Actions
Wireless Troubleshooting
Poor wireless connectivity 1. Verify device oriented for optimal connections (See Section 2: Transmitter Overview
of this document)
2. Verify wireless network best practices are followed
(See Appendix C for more
information)
Acoustic Transmitter not joining network 1. Verify the device has power
2. Verify the device is within effective communications range
3. Verify the proper Network ID has been entered into the device
4. See troubleshooting section of the Smart Wireless Gateway for more information
(Document No. 00808-0200-4420)
Limited Bandwidth Error 1. Use the slowest acceptable update Rate
2. Increase communication paths by adding more wireless points
3. Check that the device has been online for at least an hour
4. Create a new network with an additional Smart Wireless Gateway