Emerson Rosemount 8600 Series, Reference Manual, Page: 74 / 130

Reference Manual
00809-0100-4860, Rev BF
Troubleshooting
May 2019
66 Rosemount 8600 Vortex Flow Meter
5.2 Troubleshooting tables
The most common problems experienced by users of the Rosemount 8600D are listed in
“Troubleshooting tables” on page 66 along with potential causes of the problem and
suggested corrective actions. See the Advanced Troubleshooting section if the problem
you are experiencing is not listed here.
Explosions could result in death or serious injury.

Do not remove the transmitter cover or thermocouple (MTA option only) from
the electronics housing in explosive atmospheres when the circuit is alive.

Before connecting a HART-based communicator in an explosive atmosphere,
make sure the instruments in the loop are installed in accordance with
intrinsically safe or non-incendive field wiring practices.

Verify the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.

Both transmitter covers must be fully engaged to meet explosion-proof
requirements.
Failure to follow these installation guidelines could result in death or serious
injury.

Make sure only qualified personnel perform the installation.

Removing sensor WILL open process to atmosphere. Meter must be
depressurized before removing sensor.
Symptom Corrective action
Communication
problems with
HART-based
Communicator
• Check for a minimum of 10.8 Vdc at transmitter
terminals
• Check communications loop with HART-based
communicator.
• Check for loop resistor (250 to 1000 ohms).
• Measure loop resistor value (R
loop
) and source
power supply voltage (V
ps
). Check that [V
ps
-
(R
loop
x 0.024)] > 10.8 Vdc.
• Check for transmitter in multidrop mode.
• Check for transmitter in burst mode.
• Remove pulse connection if you have a
three wire pulse installation.
• Replace electronics.
Incorrect 4–20 mA
Output
• Check for minimum 10.8 Vdc at transmitter
terminals.
• Check URV, LRV, Density, Special Units, LFC–
compare these inputs with the sizing program
results. Correct configuration.
• Perform 4–20 mA loop test.
• Check for corrosion on terminal block.
• Replace electronics if necessary.
• Refer to
“Advanced troubleshooting” on
page 67 .
• See Appendix Appendix C Electronics
Verification for electronics verification
procedure.
Incorrect Pulse Output
• Check that 4–20 mA output is correct.
• Check pulse counter specifications.
• Check pulse mode and scaling factor. (Make
sure scaling factor is not inverted).
• Perform pulse test.
• Select pulse scaling so that pulse output is
less than 10,000Hz at URV.
Error Messages on
HART-based
Communicator
• See alphabetical listing in Table 5 - 1 on
page 67 . “Diagnostic messages” on page 67