Check The Cutoffs; Check The Direction Parameters; Check The Drive Gain - Emerson Micro Motion 5700 Configuration And Use Manual

Troubleshooting
March 2019
Terminal pair Terminal pair (core
(transmitter) processor)
White – green 3–4
Black – white 2–3
Black – green 2–4
6. If any resistance measurements are lower than specified, contact customer service.
7. If the resistance measurements fall within the expected ranges, return the transmitter to normal
operation and check the wiring between the transmitter and the core processor. If that does not
resolve the problem, contact customer service.
Postrequisites
To return to normal operation:
1. Reconnect the 4-wire cable from the sensor to the core processor terminals.
2. Replace the junction box cover.
3. Restore power to the transmitter.

17.14 Check the cutoffs

If the transmitter cutoffs are configured incorrectly, the transmitter may report zero flow when flow is
present, or very small amounts of flow under no-flow conditions.
Procedure
Verify the configuration of all cutoffs.

17.15 Check the direction parameters

If the direction parameters are set incorrectly, flow rate may be reported as reverse when it is actually
forward, or vice versa. Totalizers and inventories may increment when they should decrement, or vice versa.
The reported flow rate and flow totals depend on the interaction of four factors: the flow direction arrow on
the sensor, actual flow direction, the Sensor Flow Direction Arrow parameter, the Direction parameter for
the mA output or the frequency output, and the Totalizer Direction parameter.
Procedure
1. Ensure that Sensor Flow Direction Arrow is set correctly for your sensor installation and your process.
2. Verify the configuration of mA Output Direction, Frequency Output Direction, and Totalizer
Direction.

17.16 Check the drive gain

Excessive or erratic drive gain may indicate any of a variety of process conditions or sensor problems.
To know whether your drive gain is excessive or erratic, you must collect drive gain data during the problem
condition and compare it to drive gain data from a period of normal operation.
230
Function
RS-485/A and RS-485/B
VDC– and RS-485/A
VDC– and RS-485/B
Micro Motion Model 5700 with Ethernet Transmitters
Configuration and Use Manual
MMI-20029769
Expected resistance
29 kΩ to 33 kΩ
29 kΩ to 33 kΩ
16 kΩ to 18 kΩ