Sensor Empty Check; Wiring Connection Diagnosis - YOKOGAWA Admag TI Series User Manual

5.9.4

Sensor Empty Check

The sensor empty check function checks whether the sensor is in the empty pipe state, and
displays an alarm if the empty pipe state is detected.
For details about the alarm and warning, refer to Subsection 5.6.1.
This information can be checked with the following parameter.
Menu path
Display
F
OUNDATION
Fieldbus
Block Relative
Name Index
DTB 45
From the table below, check the result of the sensor empty check function.
Selection
Display
Full
Empty
IMPORTANT
• If the sensor is in the empty pipe state, output fluctuation or empty check alarm may occur.
Be sure to use the magnetic flowmeter being filled with liquid fully.
• The empty check is determined by measuring the resistance between the electrode and the
ground.For that reason, the empty pipe state may not be detected due to the piping condition,
electrode condition, and environmental noise. In particular, note that the empty check function
may not operate properly for high-viscosity fluids and adhesive fluids.
• It takes 10 to 15 minutes to diagnose the empty pipe state.Other process alarms may occur
before the empty check alarm occurs after the pipe is in the empty pipe state.
5.9.5

Wiring Connection Diagnosis

The wiring connection diagnostic function diagnoses whether the signal line and the excitation
line between the remote type sensor and transmitter are correctly connected, and displays a
warning if a misconnection is detected.
For example, if there are two sets (A and B) of remote type sensors and transmitters, this function
checks whether the signal line of transmitter A is misconnected to the signal terminal of sensor B,
or the excitation line of transmitter A is misconnected to the excitation terminal of sensor B.
It takes approximately 10 seconds to diagnose the wiring connection.
For details about the alarm and warning, refer to Subsection 5.6.1.
The setting can be configured with the following parameters.
Menu path
Display
F
OUNDATION
Fieldbus
Device setup ► Diag/Service ► Diagnosis ► Empty check ► (see below)
Diagnostic ► DTB ► Device Diagnostics ► Diagnostics/Alerts ► Diagnostics ► (see
below)
Parameter
Display
Empty status Empty Status
F
OUNDATION
Fieldbus
Full Indicates that the sensor is in the full pipe state.
Empty Indicates that the sensor is in the empty pipe state.
Device setup ► Diag/Service ► Diagnosis ► (see below)
Diagnostic ► DTB ► Device Diagnostics ► Diagnostics/Alerts ► Diagnostics ► (see
below)
<5. Functions>
F Fieldbus
OUNDATION
Description
131
Description
Displays the result of the
sensor empty check function.
IM 01E21A02-03EN