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10.7 Density Multiplier Switching by External Signals
10.7.1
Density multiplier switching function by external signals
When switching around multiple measurement objects fulid of differing measurement sensitivities to
measure their respective sensitivities, it is possible to take appropriate density measurements by
resetting the density multiplier to a value in accordance with the relevant measured object fluid each
time the measured object fluid is changed. In the event that the measurement objects fluid are limited to
no more than four types, this function can be used to save the trouble of resetting the density multiplier
each time through manual input. Implement the span calibration in terms of each measured object fluid
in advance, obtain and set the respective density multipliers C1 to C4 and then switch around the density
multipliers to be used for density calculation by means of the external voltage signals of two points in
accordance with the measurement objects fluid being switched around.
Table 10.7.1 shows the relationship between the statuses of external voltage signals and selected density
correction factors.
Status of External Voltage Signal
DI2
L
H
L
H
H: Voltage signals of 20 to 30VDC
L: Signals of no more than 2VDC
Table 10.7.1
DI3
L
C1 (Same as the normally used density multiplier C)
L
C2
H
C3
H
C4
98
Selected Density Multiplier
6 F 8 A 0 7 8 7
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