Inficon BPG402-S, Руководство по эксплуатации

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tina46e1-b (2017-12) BPG402.om
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The BPG402-S, SL have one, the gauges BPG402-SD, BPG402-SE and
BPG402-SP have two independent, manually adjustable switching functions. Each
switching function has a floating, normally open relay contact. The relay contacts
are accessible at the sensor cable connector (
→
 19, 20).
The threshold values of the switching functions can be set within the pressure
range 1×10
-9
mbar … 100 mbar via potentiometers "SETPOINT" (BPG402-S, SL)
or "SETPOINT A" and "SETPOINT B" (BPG402-SD, -SE, -SP).
The following rule applies:
U
Threshold
= 0.75 × (log p
Setpoint
– c) + 7.75
Where constant c is pressure unit dependent (
→
Appendix A).
Mea
sured
value
Off
On
Switching function
Measuring Signal
(Pressure p)
(Setpoint A, B)
Time t
Off
U
Threshold
Hysteresis
10% U
Threshold
The hysteresis of the switching functions is 10% of the threshold setting.
4.13 Switching Functions