Troubleshooting The Meter - Emerson Rosemount 3410 Series Maintenance And Troubleshooting Manual

Troubleshooting
January 2024
2.2

Troubleshooting the meter

The following sections show errors that may occur with the meter hardware, firmware, or
connections and recommend actions to resolve the problems.
2.2.1 Acquisition Module Error
Recommended actions
2.2.2 Acquisition module is not compatible with firmware
Recommended actions
2.2.3 Chord failure
Chord is hard failed, and meter is unable to obtain measurement data from a pair of
transducers.
Recommended actions
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1. Check/replace intrinsically safe (IS) barrier.
2. Check/replace acquisition module.
3. Attempt the program download procedure to reinstall the firmware.
a) Cycle power to the meter.
b) Replace the acquisition module.
c) If the acquisition module cannot be reprogrammed, collect a complete
archive log and contact your local Emerson Flow service representative.
1. Check that acquisition module is compatible with model number configured in
meter (3414 four-path or 3418 eight-path).
2. Replace the acquisition module.
1. If a chord is failed and no other transducers are failed or reporting status alerts,
the issue is most likely isolated to this pair of transducers or its cabling. Check
the transducer wiring for this pair of transducers to ensure connections are
secure and wired correctly.
2. Remove the transducer cable from the transducer and measure the resistance
with an ohm meter.
• For T-11 and T-12 transducers:
a. Remove the transducer cable from the transducer holder and
measure the resistance with an ohm meter across the two pins on
the back of the transducer holder.
If the value is over 2 ohms, replace the transducers.
• For T-21, T-22, T-32, and T-41 transducers:
a. Remove the transducer cable and transformer retainer assembly from
the transducer holder and measure the resistance with an ohm meter
across the two pins, making sure not to touch the ohm meter probe
tips with your fingers.
If the value is not 1 Mohm ± 0.2 Mohm, try cleaning the pins with
alcohol and a small object, like a toothpick, to see if that lowers the
resistance.
Maintenance and Troubleshooting Manual
Emerson.com/Rosemount
00809-0600-3104