Vacuum Measurement and control systems - Edwards (formely known as BOC Edwards) vacuum guages

Edwards (formerly BOC Edwards) APG Active PIRANI Gauges Atmosphere to 10^-10 mbar

The Edwards (formerly known as BOC Edwards) Active Pirani Gauges (APG) combine the head controller in one compact unit. The well proven, cost effective and reliable Pirani range has a substantial user base with a successful track record in the measurement of rough and backing pressures across a broad spectrum of applications.

Features and Benefits

• Wide range, regulated, internal power supply
  Runs from standard d.c power supplies +26 to _36 V

  Tolerant to voltage fluctuations

• Drive eletronics combined in the gauge head
  Reduces the system cost
  Saves valuable rack space

• Medium and low pressure versions available

  APG-m and -M from atmosphere to 10^-3 mbar
  APG-L from atmosphere to 10^-4 mbar

• Standard analogue output 0 to 10 V d.c.

  Easy interface with a computr or plc

  Fault output indication

• Adjustable set point
  For process control and interlocking
  Provides vacuum status indication
  Set point level read visually or with voltmeter

• Low output impedance and integral Faraday shield
  Provides high level of noise immunity
  Permits long cable runs (up tp 100m)

• Corrosion resistant versions available

• Two tube types (Al and St St) & numerous flange types to suit customer applications

Technical specification

Pressure range:

APG-M and APG-MP Atmosphere to 10^-3 mbar/Torr

APG-L Atmosphere to 10^-4 mbar/Torr

Accuracy*:

APG-M and APG-MP Typically ±15% of reading at <100mbar/Torr

APG-L Typically ±15% of reading at <10mbar/Torr

Maximum overpressure: 10 bar absolute (145 psi)

Power Supply: +20 to +36 V d.c. (max 1 V ripple)

Power consumption: 1.5 W max
Output signal: 2 TO 10 v D.C.

Adjustments Set vacuum and set atmosphere

Set point: (open collector transister)

Range of set point: 5% to 95% full scale voltage

Fixed hysteresis: 7% full scale voltage

Rating: 40 V d.c 100mA max

Level setting resolution: ± 2% full scale voltage

Temperature range:

Operating temperature: +5 to +60 ºC

Storage temperature: -30 to +70 ºC

Materials exposed to vacuum

Aluminium tube: Aluminium, Nickel, PTFE, Fluoroelastomer

Stainless steel tube: St St 316L, Nickel, PTFE, Fluoroelastomer

Filament:

APG-M and APG-MP Gold coated tungsten

APG-L Platinum/Rhodium (90/10)

Internal volume: NW: 6 cm³ 15mm O.D. 10 cm³

Weight:

Aluminium: 0.12kg

Stainless Steel: 0.2kg

External interface connector: 8 way FCC68(RJ45) socket

Vacuum Fitting: NW16, NW25 or 15mm O.D. 10 cm³

Standards

Electronic design: BS EN 61010-1

Electrical noise immunity: BS EN 61326

Class B emissions

Flame resistant casing: UL 94 (V0)

Enclosure rating: IP 40

Pin allocation

1. Supply positive

2. Supply common

3. Gauge output

4. Gauge indentification

5. Signal common

6. Set point output

7. Read set point

8. Not connected

• Accuracy is reduced at the lower limit of the measuring range

Ordering information