 |
| 7250i Digital Pressure Controller/Calibrator |
| |
|
| |
 |
| The Model 7250i, like the 7250xi, also provides percent of reading performance. It is an economical alternative to the 7250xi, as it provides 0.005% of reading from 25% to 100% of the full scale pressure range.
The 7250i incorporates a high speed control system which will control to the set-point in less than 15 seconds with no overshoot. Like the 7250xi, the 7250i features an active matrix color screen, enhanced navigation menus and active and passive control modes. Control stability has also been improved to 10 ppm. It is an ideal choice for calibrating pressure devices where a high level of performance is required over a wide pressure range
- Ranges from 0 - 5 through 0 - 1000 psi
- Precision: 0.005% of reading from 25% to 100% of range
- Fully automatic, range selection not required
- Fast control : <15 seconds with zero overshoot into a 15 cu.in. volume
- Stability : 0.0075% of reading per year
- Control Stability: 0.001% FS
- Labview® driver availab
|
Pressure Ranges |
| Model 7250i |
Any Full Scale pressure range from 5 to 2500 psig (400 mbar to 172 barg). Or, Permanent Absolute ranges from 15 to 50 psia (1 to 4 bara). |
| 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 7250i
From 25% to 100% full scale (FS): 0.005% of reading
Below 25% FS: 0.005% of 25% 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 7250i
0.005% of 25% FS or 0.0075 psi (0.5 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 7250i—25% 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
|
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 |
|
|
|
 |
|
