Toshiba LF434 - Manual (Page 92)

TOSHIBA
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К,2Л6 Zero Offset Adjustment
Zero offset can b e ¿ipplied lo make the flowmcior outpuls comparable (o process values
mcasureil by other instruments. If the ?ero adjustment described in 6.2 requiring a zero
flow rate condition can be performed, this zero offset adjustment is aot needed. When the
zero adjustment is completed, zero offset will be automatically cleared to zero.
Z e r o offset can be ,set in the range described below:
Zero ulTsel: ±0.125 m/s {±1,25 % of 10 m/s—maximum range) maximum
Proceed as follows to check or change the zero offset value,
■ To cheek the zero offset value:
Key operation Display example Description
SET
Ml; MANUAL ZERO
^002. 5 X
Press [SPL'n first to start the item.s selection sequence
and select Ml:MANUALZERO from among the
configuration hems using [ ► ] and [
a ] keys. Then
:>ress rSKTl again to display the current zero offset value
SET
□
Ml: MANUAL ZERO Pressing [SET], the system returns to (he items selection
sequence.
■ To change the zero offset value:
Calculate the zero offset value with (he following equation:
Zero offset value {%] = {(actual flow rdte) - (LF404 measured value)}
The zero offset value should be calculated in percent value for Range 1, Sec the following
example.
(Example)
Measured condition Flow rate % in measuring span
Actual flow rate obtained
from other instrument.
KJ.O m-Mnin 50
LF401 measured value l().5 m Vmin 52.5 ii:
Zero offset -2.5 %
If zero offset is set to -2.5 %, the LI’404 convener will output .-^0.0 %
flow rale instead nl'52.5^^.
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