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

Edwards (formerly BOC Edwards) APGX-H Active Lnear Convection Gauge 1000 to 2x10^-4 Torr

The new Edwards (formerly known as BOC Edwards) Linear convection gauge has a wide measuring range from 1333 to 3x10^-4 mbar (1000 to 2.3x10^-4 Torr). The use of convection technolocy ensures accuracy and sensitivity are maintained to the top of the range. The gauge is compact and may be mounted in any orientation, simplifying installation where space is limited. The gauge incorporates a set point and two LED's, which indicates set point and gauge status. For reduced cost of ownership, the gauge is provided with a replaceable tube, in which calibration is stored.

Features and Benefits

• Wide measuring range
  1333 to 3x10^-4 mbar (1000 to 2.3x10^-4 Torr).

• Use of convection technology
  Ensures consistent measuring accuracy and repeatability

• Replaceable tube
  Reduces cost of ownership and elimitates un-necessary environmental contamination

• Standard analogue output
  Log linear range 2.5 to 9.215 V (1 V/decade)
  Compatible with Edwards (formerly known as BOC Edwards) AGC, AGD and TIC controllers

• Calibration data held in tube
  Tubes are shipped pre-calibrated, so the user does not need a vacuum system capable of pumping down 10^-5 mbar

• Can be mounted in any orientation
  Unlike many convection type gauges, the APG-H maintains accuracy in any orientation across the whole measuring range, making for easier installation in restricted areas

• Compact Instrument
  The APG-H is the smallest high pressure gauge offered by Edwards (formerly known as BOC Edwards) and is significantly smaller than leading competitor designs

• Local Status indication
  LED's indicate set point and gauge status at the gauge head

Technical specification

Pressure range: 1333 to 3x10-⁴ mbar/1000 to 2.3x10^-4 Torr

Accuracy*: ±15% of reading ± 3x10^-4 mbar

Maximum overpressure: 10 bar absolute (145 psia)

Repeatability: ±5% of reading

Resolution: 6 mV increments, corresponding to 1.2% FS

Response time: <100ms

Power Supply: 14.5 to 30 V d.c.

Power consumption: 1.5 W max

Output signal: Log linear in range 2.5 to 9.125 V (1 V/decade) P=10v^-6 or V=log P+6

Diagnostics** (errors):

Meaning Gauge Output

Filament broken: Filament broken 9.5V

Calibration error: Calibration attempted outside 9.6V |

Limits (>1E-2mbar or <200 mbar) or

filament degradation

Tube disconnected: Electronics powered up with- 9.7V

out rube connected

Display Meaning Color

Status No power gauge or malfunction Off

Power on, gauge operating normally green

error red

Gauge initialising red/green

Set point Set point off

(Pressure above threshold) off

Set point on

(Pressure above threshold) Amber

Adjustments Set vacuum and set atmosphere

To allow for variations in barometric pressure, atmosphere may be set in the range 700 to 110 mbar (525 to 825 Torr)

Set point: (open collector transister)

Range of set point: 1.8 to 9.3V

Fixed hysteresis: 500mV (½ decade)

Rating: 30 V d.c. 100MA

Default setting: 6V (1 mbar)

Settable resolution: 6 mV

Temperature range:

Operating temperature: +5 to +60 ºC

Storage temperature: -30 to +70 ºC

Materials exposed to vacuum

Aluminium tube: Aluminium, Tungsten, Nickel, PTFE, Fluoroelastomer and Bronze

Stainless steel tube: St St 316L, Tungsten, Nickel, PTFE, Fluoroelastomer and Bronze

Filament: Tungsten

Internal volume: 11 cm³

Weight:

NW16 Aluminium: 0.11kg

NW16 Stainless Steel: 0.16kg

NW25 Stainless Steel: 0.17kg

1/8” NPT Stainless Steel: 0.15kg

External interface connector: 8 way FCC68(RJ45) socket

Interface cables: Use existing range of active gauge cables

Vacuum fitting: NW16, NW 25 & 1.8” NPT

Standards

Electronic design: BS EN 61010-1 2001

Electrical noise immunity: BS EN 61326

Industrial location, class B emissions

Flame resistant casing: UL 94 (V0)

Enclosure rating: IP 40

Pin allocation

1. supply positive

2. Supply ground

3. Signal output

4. ID resistor

5. Signal ground

6. Set point output

7. Remote calibration input

8. Not used

Compatibility

AGC: The APGX-H is supported by all new AGC's with serial numbers greater than: 027376147 (non RS232 versions) and 027274158 (RS232 versions). Earlier controllers will require a software up grade.

AGD: The APGX-H is supported by AGD for APGX

TIC: APGX-H is supported by TIC software at version D39700640 or higher. Software upgrades for TIC may be obtained in the first instance electronically by request for upgrade by the user. Ultimately, this will be possible from a dedicated website.

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

• ** The set point output will be turned off if an error is detected

• Errors may be cleared by powering down the gauge and then back up

Ordering information