Kurz 410FTB, Operation Manual

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Kurz B ‐ Series Operations Guide 6– 2
Flow Meter Configuration
Specifying Drift Check Triggers
There are four ways to initiate the zero ‐ mid ‐ span drift check:
•
A specified time interval
•
An external contact closure through digital input #2
•
A menu option in Extended Utilities mode
•
A Modbus command
The duration of the individual zero, mid, or span checks are controlled by user ‐ specified duration
values.
Specified-Time Interval Drift Check
The zero ‐ mid ‐ span check can be triggered by the drift check interval time. To configure this
option, turn ON the Auto Drift Check. When it is triggered, it will perform the zero, mid, and span
sequence. Change the value of the drift check interval to change the frequency that the drift
check starts. See “Option 23 — Drift Check” for information about setting up drift check.
External Digital Input
The external digital input trigger does not require that Auto Drift Check be turned ON. When the
flow meter digital input (DI) channel #2 is grounded, the meter initiates the zero ‐ mid ‐ span drift
check sequence. While the system is busy performing the drift check sequence, it will not accept
another command via the digital input. After the drift check sequence completes, the meter
monitors the DI channel for the next request to initiate a drift check.
If a specified time internal drift check is underway while an external drift check is triggered, the
external drift check will start after the internal drift check completes.