Toshiba LF494 - Manual (Page 105)

TOSHIBA
6 . F 8 A 0 7 7 4
9*2,3 100 % Flaw Rate (Span) Calibration
Using the converter's internal calibration circuit, the system can calibrate the KHl^ flow
rate point (hereafter called span).
To check the span of the converter:
Key operation Display example Description
SET
□
N3:FLQW CAL100ÜÍ
100
,
1
%
Press [SE'I ] first to start the items selection sequence
and select N3; F1X)W CAL 100% from among the
configuration items using f ► ] and [
^ ]
keys. Then
press [SET] again to go into the calibration mode
and calculate and display the span using a simulation
signal.
SEl
N3:FLDHr CAUÜQÍ
Pressing [SET], the syslem returns to the items
□
selection sequence.
To change the .span of the converter:
Key operation Display example Description
SET
□
N3:FL0W CAL1G0IK
100
.
1 1
Press [SET] first to start the items selection
sequence and select N3: FLOW CAL100% from
among the configuration items using [ ► | and
[
^
1 keys. Then prc,ss [SET] again to go into the
calibration mode and calculate and display
100
%
flow rate point using a simulation signal.
►
□ ADJUST READY
100
.
1
%
Pressing [ ► 1, ''ADJUST READT’ appears as
shown left and the system goes into a calibration
ready condition, (Note 1)
N3:FL0H CALIOOS
t
CAL lOOlK AOJ.
Pressing [SET], CAL t00% AOJ.'" appears as
shown left and the system starts the
100
%
calibration. The zero calibration takes about 3 to
6
seconds. (Note 2)
SET
□ N3:FL0W CAL100ÜÍ
1
Q
0
.
0
%
Newly calibrated 100% flow rate point appears.
SET
□ N3:FL0N CALIOOS
Pressing [SET], the system returns to the items
selection sequejtcc.
Notes:
1. To cancel the spEin calibration, press
[ ^ ] .
The system returns to the point where 10(1%
flow rate is displayed.
2. Calibration time depends on the csciration frequency (24 llz: 3 see, 12 Uz and
6
Hz;
6
see).
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