Toshiba LF434 - Manual (Page 106)

TOSHIBA
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9.2.2 50 % Flow Rate Calibration
Ub^ingtho converters internal calibration circuit, the -system can calibrate the 5 0 % flow rate
point. The 5(1% Row rate point calibration mast be executed after conducting the 1(Ю% ilow'
rate (span) calibration. Tlie 5 0 % flow rate calibration may differ depending on the 100%
flow' rate calibration result,
To check the 50% now rate point of flow measurement;
Key operation Display example Description
SKI
□
N2:FLOW SIC Ш
50, 1 %
Press [SKT] first to start the items selection sequence
and select N2: FIX)W SIC. 50% from among the
configuration items using [ ► | and [ ▲ ) keys. Then
press [StT] again to go into the calibration mode
and calculate and display 50% flow rale point using
a simulation signal.
SKT’
□
N2:FLOW SI G Ш
Pressing fSETL The system returns to the items
selection sequence.
Jo change the 50% flow rate point of the converter:
Key operation Display example Deiicription
S E T
□
N2:FLOW SIG S 0 %
SD, 1 %
Press [SET'] first to start the items selection sequence
and select N2i FLOW SIG 50% from among the
configuration items using [ ► ] and [
^ ] keys. T hen
press [SETJ again to go into the calibration mode
and calculate and display 50% flow rate point using
a simulation signal.
►
ADJUST READY
50. 1 %
Pressing [ ► ], "'ADJUST READappears as
shown left and the system goes into a calibration
ready condition. (Note 1)
N2;FLOW SIG 50W
t CAL. 509t ADJ.
Pressing [SKI ], CAL-50% AD l T.” appears as
shown left and the system starts the 50% calibration,
i’hc zero calibration takes about 3 to 6 seconds.
[Note 2)
SHI'
□ N2: FLOW SIG 509i
50, 0
%
Newly calibrated .50% flow rale point appears.
SET
□ N2;FLOW SIG SOW
Pressing [SET], the system returns to the items
selection sequence.
Notent
1. To cancel 50% flow rate calibration, press | a j. The system returns to the point w-here
50% flow rale is displayed.
2. C'alibraiion time depends on the excitation frequency (24 llz; 3 see, \ 2 H z aiid6Hz: b sec).
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