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| 7250 xi Digital Pressure Controller/Calibrator |
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The Model 7250xi provides the highest accuracy available in a digital pressure controller today. Using multiple high performance Ruska manufactured quartz sensor technology, the 7250xi is able to achieve 0.005% of reading from 5% to 100% of the full scale pressure range. This is coupled with a high speed controller which will control to the set-point in less than 15 seconds with no overshoot.
The new 7250xi features an active matrix color screen display with enhanced navigation menus for ease of operation. Other new features include 10 ppm control stability with active and passive control modes. In active mode, the controller has the ability to make up for small leaks in the system. For systems where leaks are virtually eliminated, passive mode offers enhanced control stability by allowing the user to define a bandwidth around the set-point where the controller will shut off allowing the pressure to completely stabilize. |
- Pressure ranges from 0—400 mbar to 0—210 bar
- Model 7250xi and 7250i provide enhanced precision: 0.005% of Reading
- Economical Model 7250 provides 0.005% of full scale precision
- Stability: 0.01% of reading per year
- Time to setpoint: <15 seconds with no overshoot
- Control stability to 0.001% of full scale
- Active matrix color screen with enhanced navigation menus
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Pressure Ranges |
| Model 7250xi |
Any Full Scale pressure range from 20 to 2500 psig (1.6 to 172 barg). |
| Optional Modes |
Absolute using barometric reference sensor for ranges from 15 to 2500 psig (1.0 to 172 barg)
Vacuum (negative gauge) for ranges 15 to 2500 psig (1.0 to 172 barg)
Vacuum reference (requires external vacuum pump) |
Performance |
| Precision |
Model 7250xi
From 5% to 100% full scale (FS): 0.005% of reading
Below 5% FS: 0.005% of 5% FS
Precision is defined as the combined effects of linearity, repeatability and hysteresis throughout the operating. Expression of uncertainty conforms with the recommendations of the ISO Guide to the Expression of Uncertainty in Measurement. |
| Stability |
Ranges 2500 psi (172 bar): 0.0075% of reading per year
3000 psia (210 bar) range: 0.01% of FS |
| Control Stability |
Active mode: 0.001% FS (10 ppm) Passive mode: no additional uncertainty |
| Display Resolution |
User selectable to 1:1,000,000 |
| Control Response |
20 seconds or less with zero overshoot into a 15 in3 volume (245 cc) for ranges to 2500 psi (172 bar)
60 seconds for 3000 psia (210 bar) range |
| Negative Gauge Precision (optional) |
Model 7250xi
0.005% of 5% FS or 0.00075 psi (0.05 mbar), whichever is greater |
| Barometric Reference (optional) |
0.002 psi (0.1379 mbar) maximum error per year |
| Vacuum Reference (optional) |
0.0002 psi (0.014 mbar) maximum error per year (Only available on 7250i and 7250) |
Calibration |
| Calibration |
A calibration report with traceability to National Institute of Standards and Technology (NIST) is provided. A NVLAP-accredited calibration is available. |
Total Uncertainty |
| Maximum deviation from the true value of pressure including precision, stability, temperature effects and the calibration standard |
| Model 7250xi -- 5% to 100% FS |
90 day 0.006% reading
1 year 0.009% reading |
Control Parameters |
| Volume |
5 to 60 cubic inches (82 to 980 cc) |
| Low Control (absolute) |
0.15 psia (10 mbar) |
Communications |
| Communications |
RS232 and IEEE-488, SCPI syntax. Series 7215, Model 7010, Series 6000 and DPI 510 emulation are standard.
LabVIEW driver
MetCAL driver—Optional
Firmware updates are performed via RS232 interface. |
Languages |
| Menus and functions |
The Series 7250 is capable of displaying menus and functions in:
English, French, Chinese, German, Japanese, Spanish and Italian. |
Options |
| Options |
- Barometric reference (absolute and vacuum)
- Vacuum mode (negative gauge)
- Vacuum reference (requires external vacuum pump)
- Intecal software
- NVLAP-accredited calibration
- Triple scale for 3000 psia (210 bar) 7250
- Rack mount kit
- Liquid trap assembly
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General |
| Display |
TFT, VGA, active matrix, 6.4 in (162.5 mm) 640 x 480 resolution, 65,000 colors |
| Temperature |
Operating: 64°F to 96°F (18°C to 36°C)
Storage: -4°F to 158°F (-20°C to 70°C) |
| Humidity |
5% to 95% relative humidity, non-condensing |
| Dimensions |
(h x w x d) All versions: 7 in x 16.5 in x 19 in (178 mm x 419 mm x 483 mm) |
| Weight |
Model 7250/7250i: 17 lb (7.7 kg)
Model 7250xi: 20 lb (9 kg) |
| Test Port and Supply Connection |
1/4 in NPT female |
| Warm Up Time |
2 to 3 hours; may be left on indefinitely |
| Pressure Medium |
Nitrogen or clean dry air |
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