Answer / ejaz maqsood

Because the Bentlay Nevada uses the NPN Transister. thats why its suplly in negtive voltage

Answer / carl_ellis

Because negative voltage is what the Bentley Nevada circuits use.

The regional guy from Bentley Nevada was in the other day so I asked him. His answer, "Historical legacy. It's always been that."

The point is, if the circuits need a negative voltage, that's what's used.

Carl Ellis
Measure First

Answer / mohammad javed

Don Bentley uses the PNP transistor which works on negative bias voltage. That why a negative voltage is used in vibration sensors. It is the circuit design which require negative voltage.

Explain the thermocouple and RTD?

1 Answers  

---

hey any one got the papers of SAIL and HPCL plz do help me by posting them to my mail ID's naren07_87@yaho.co.in, surenarendra@gmail.com

0 Answers  

---

what is axial shift n what is differential expansion in turbine? how many sensor probes r mounted for this n how it works?

2 Answers   Apple,

---

how to calibrate temprature switch and flow switch ?

1 Answers   Adgas,

---

Watt is Wrms define rms?

2 Answers  

---

---

what the pid setting in controller

2 Answers  

---

What is the Difference between E/P Positioner and I/P positioner in a control valve? In which applications the respective positioners are used in?

18 Answers   ADCO,

---

What is difference between radial vibration and axial vibration explain in detail .

0 Answers   Emerson,

---

this site is owned by an nonsense

0 Answers   Bhel, Prolific,

---

How u measure the massflow in orifice flow measurement techniques

0 Answers   Johnson Matthey,

---

Im working in a shopping center, it is also hotel and office building, two towers exactly and someone is proposing a PLC control for the HVAC system, but Im thinking of a DDC control system. in this case what is the difference between PLC and DDC control?

1 Answers  

---

what pressure transmitter?

8 Answers   Bhel,

---