Remote Zero Adjustment; Remote Selection Of Fixed Value Output - Toshiba LF620F Instruction Manual

10.6 Remote Zero Adjustment

On-stream zero adjustment in a zero flow rate condition can be started with an external signal.
To do this, set DI as a zero adjustment start signal. See 8.2.19, "Digital I/O"
[Signal Input Timing]
Zero adjustment
start signal
* The start signal must be set to H level first, then it must go to L level after the passage of more
than 10 seconds but not more than 20 seconds, as shown above.
If the signal does not go to L level within this specified period, it will be ignored.

10.7 Remote Selection of Fixed Value Output

A user-specified 4-20 mA output and pulse output can be selected with a DI signal.
Proceed as follows to use this function:
Fixed-value setting
Set the fixed-value for current output and for pulse output. See 8.2.27, "Fixed-Value
Output." Set the fixed-value output enable/disable status to "OFF."
If the pulse output is not used, fixed-value setting for pulse output is not needed.
DI function setting
Set DI to use as a fixed-value output control signal. See 8.2.19, "Digital Input."
Control signal input conditions:
Control signal input level
L level
H level
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Zero adjustment start
10 seconds
20 seconds
4 –20 mA and pulse output
Outputs the measured value.
Outputs the fixed-value.
－ 128 －
6 F 8 A 0 9 2 8
H level
L level
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