Varain FRG-720 Bayard Alpert Pirani Gauge - Ideal Vacuum Products

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4.4 Switching Function Profibus <strong>Gauge</strong> The threshold values of switching functions A and B can be set within the pressure range 1×10 -9 mbar … 100 mbar via potentiometers "SETPOINT A" and "SETPOINT B". For the corresponding threshold voltages U Threshold , the following equation applies: U Threshold = 0.8129401 × (log p Setpoint – c + 9.30102999) Constant c depends on the pressure unit (→ 14 and → [1]). Measuring signal (Pressure p) (Setpoint) Measured value Hysteresis 10% U Threshold Time t U Threshold Switching function Off On Off The hysteresis of the switching functions is 10% of the threshold setting. Put the gauge into operation. Connect the +lead of a voltmeter to the threshold measurement point of the selected switching function ("Setpoint A" Pin 3, "Setpoint B" Pin 6) and its –lead to Pin 5. 26 tqma03e1 (2010-05)
Setpoint A Pin 3 Setpoint B Pin 6 Pin 5 max. ø2.5 Using a screwdriver (max. ø2.5 mm), set the threshold of the selected switching function (Setpoint A, B) to the desired value U Threshold . A functional check of the switching functions (On/Off) is only possible via fieldbus interface (→ [2] for Profibus gauge) or by measuring the relay contacts with a continuity checker/ohmmeter (→ "Power Connection", sensor cable connector). tqma03e1 (2010-05) 27
Page 1 and 2: www.idealvac.com (505)872-0037 vacu
Page 3 and 4: We reserve the right to make techni
Page 5 and 6: Contents Product Identification 2 V
Page 7 and 8: 1.3 General Safety Instructions •
Page 9 and 10: Output signal Output signal (measur
Page 11 and 12: Voltage at the gauge Power consumpt
Page 13 and 14: Dimensions [mm] 4-40UNC 2B 4-40UNC
Page 15 and 16: Gas Type Dependence For gases other
Page 17 and 18: Caution Caution: vacuum component D
Page 19 and 20: 3.2 Power Connection Make sure the
Page 21 and 22: Electrical connection Pin 1 Relay S
Page 23 and 24: 4 Operation When the supply voltage
Page 25: 4.3 Profibus Interface (part no. FR
Page 29 and 30: Unfasten the lock screws and unplug
Page 31 and 32: Standard Gauge If you are using a
Page 33 and 34: Push the button for at least 5 seco
Page 35 and 36: 8 Disposal DANGER DANGER: contamina
Page 37 and 38: EC Declaration of Conformity We, VA
Page 39 and 40: Notes tqma03e1 (2010-05) 39

Varain FRG-720 Bayard Alpert Pirani Gauge - Ideal Vacuum Products

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