Toshiba LF494 - Manual (Page 104)

TOSHIBA
6 F . 8 A 0 7 . 7 4
9 - 2 . 2
50
%
Flovi^ Rate Calibration
Using Ibc L'onvtirter’s imernaJ calibration circuit, the system can calibrulc thc5Q?i: tlow rate
point, TEte 50% flow rale point calibration must be executed after conducting the 100% flow
rate (span) calibration. The 50% flow rate calibration may differ depending on the 101)%
flow rate calibration result,
I’o check the 50% flow rate point of flow measureTneptt
Key operation Display example Description
i
SET
N^FLOW SIG
m
50. 1
%
Press [StiT] finsl to start the items selection sequence
and solect N2: FLOW STG50% from among the
configuration items using [ ► ] and [ a ] keys. Then
press [SET] again to go into the calibration mode
and calculate and display .50% flow rate point using
u simulation signal.
S E T
□ N2:FLDV SIG 5QÏ
Pressing [SETj, the system returns to the items
selection sequence.
■ To chans e (he 50% flow rate point of the converter:
Key operation Display example Description
SRT
□
N2:FLOW SIG 50%
50. 1 %
Press [SET] first to start ihe items selection sequence
and select N2i FLOW SIG 50% from among the
configuration items using [ ► ] and [
a
] keys. Then
press [SET] again to go into the calibration mode
■Mid calculate and display 50% flow rate point using
a simulation signal.
►
□ ADJUST READY
50. 1
%
Pressing [ ► ]. “ADJUifi’RFADV’ appears as
shown left and the system goes into a calibration
'eady condition, [Note 1)
NZ:FL0Vi SIG 50%
* CAL. 50% AOJ.
Pressing [SET], CAL. 50% ADJf" appears as
shown left and the system starts the 50% calihratioti.
The zero calibration takes about 3 to
6
seconds.
(Note 2)
S E T
□ NZ:FL0IV SIG 50%
50. 0 %
Ni'ewly calibrated 50% How rale point appears*
S E T
□ N2:FL0lf SIG 50%
Pressing [SET], the system returns to the items
selection sequence.
Note.s:
1, To cancel ^0% flow rate calibration, press [ a ]. f he system returns to the point where
50% flow rate is displayed.
2, Calibration time depends on the excitation frequency (24 N
¿1
3 sec, 12
H z
and iiHz: fi sec).
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