The FRG-720 and FRG-730 combine Agilent's Pirani and Bayard-Alpert sensor into a single compact design that provides measuring capability from 5 x 10-10 mbar to atmosphere (3.8 x 10-10 Torr to atmosphere). Combining these two technologies into a single unit reduces complexity and integration challenges while protecting the Bayard-Alpert sensor from premature burnout.
Technical Specifications
| Measurement range (Air, O2, CO, N2) | 5 x 10-10 to 1000 mbar (3.8 x 10-10 to 760 Torr) | ||||||
| Accuracy | 10-8 to 10-2 mbar/torr – ± 15% of reading | ||||||
| Repeatability | 10-8 to 10-2 mbar/torr – ± 5% of reading | ||||||
| Degas | p < 7.2 x 10-6 mbar – electron bombardment, max. 3 min | ||||||
| Pressure, maximum |
2 bar absolute |
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| Temperature |
Operation (ambient) |
Storage | Bakeout at flange w/extension | Bakeout at flange wo/extension | Bakeout w/electroncs removed | ||
| 0 to 50 °C | –20 to +70 °C | 150 °C | 80 °C | 150 °C | |||
| Supply voltage | 20 to 28 VDC, 1.4 A on startup for 200 msec, 0.8 A operating | ||||||
|
Output signal analog Measurement range Voltage vs. pressure Error signal Minimum loaded impedance |
0 to 10 V 0.774 to 10.0 V 0.75 V/decade 0.3/0.5 V 10 kΩ |
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| Communication interface | RS-232C | ||||||
| Electrical connection | D-sub, 15 pin, male | ||||||
| Maximum cable length | 100 m (330 ft) | ||||||
| Materials exposed to vacuum | Yt2O3, Ir, Pt, Mo, Cu, W, NiFe, NiCr, stainless steel, glass | ||||||
| Internal volume | KF/CF | 24 cm3 (1.46 in3) /34 cm3 (2.1 in3) | |||||
| Weight | KF/CF | 285g/550g | |||||
| Protection type | IP30 | ||||||
| Setpoint relays (1) for FRG-730 | Range | Relay contact | Hysteresis | Contact rating | |||
| 1 x 10-9 to 100 mbar | n.o., potential free | 10% of reading | 30 V/0.5 A DC | ||||
| Profibus Option | |||||||
| Baud rates | 9.6/19.2/93.75/187.5/500 kBaud; 1.5/12 mBaud | ||||||
| Address | 2 switches (address 00 – 127) or network programmable | ||||||
| Digital functions | Read pressure, select units (Torr, mbar, Pa); degas function, Pirani full scale adjust; monitor gauge status; safe state allows definition of behavior in case of error; detailed alarm and warning information | ||||||
| Analog functions | 0 to 10 V analog output pressure indication; two setpoint relays A + B | ||||||
| Setpoint relays (2) | Range | Relay contact | Hysteresis | Contact rating | |||
| 1 x 10-9 to 100 mbar | n.o., potential free | 10 % of reading | 60 V/0.5 A DC | ||||
| Connector for Profibus DP | D-sub, 9 pin, female | ||||||
Outline Drawing
| Description | KF25 | CF35 |
| FRG-720 Pirani/Bayard Alpert combination gauge single filament | FRG720KF25 | FRG720CF35 |
| with display | FRG720KF25D | FRG720CF35D |
| with setpoints and Profibus | FRG720KF25SP | FRG720CF35SP |
| FRG-730 Pirani/Bayard Alpert combination gauge dual filaments w/set pts | FRG730KF25S | FRG730CF35S |
| FRG-730 Pirani/Bayard Alpert combination gauge dual filaments w/set pts. and display | FRG730KF25SD | FRG730CF35SD |
| FRG-730 Pirani/Bayard Alpert combination gauge dual filaments w/set pts and Profibus | FRG730KF25SP | FRG730CF35SP |
| Accessories | ||
| FRG-720 Replacement sensor KF25 | FRG720KF25RS | |
| FRG-720 Replacement sensor CF35 | FRG720CF35RS | |
| FRG-730 (dual filaments) KF25 Replacement sensor | FRG730KF25RS | |
| FRG-730 (dual filaments) CF35 Replacement sensor | FRG730CF35RS | |
| FRG-720/730 Baffle | FRG720BFL | |
| FRG-720/730 Power Supply 24V DC/RS232C | FRG720PWR | |
| FRG-720/730 Bakeout extension, 100mm | FRG720BKE | |
