The Series 7250 Pressure Controllers/Calibrators offers unmatched performance, an active matrix color screen and enhanced control stability. Utilizing multiple sensors and ranges in a single instrument, the Series 7250 combines precision, stability, speed and affordability. Models 7250xi, 7250i and 7250, up to 2,500 psi (17.2 MPa), use a unique quartz sensor, the most accurate pressure sensing technology in a pressure calibrator. Each quartz sensor is manufactured and tested to provide the ultimate performance required by a Fluke Calibration pressure calibrator, ensuring that every customer receives quality, precision and stability in their instrument.
|Model 7250||Any Full Scale pressure range from 5 to 2,500 psig (35 kPa to 17.2 MPa). Or, Permanent Absolute ranges from 15 to 50 psia (100 to 350 kPa). A 3,000 psia range (21 MPa) is also available.|
|Model 7250i||Any Full Scale pressure range from 5 to 2,500 psig (35 kPa to 17.2 MPa). Or, Permanent Absolute ranges from 15 to 50 psia (100 to 350 kPa). A 3,000 psia range (21 MPa) is also available.|
|Model 7250xi||Any Full Scale pressure range from 20 to 2,500 psig (138 kPa to 17.2 MPa).|
|Optional Modes||Absolute using barometric reference sensor for ranges from 15 to 2,500 psig (100 kPa to 17.2 MPa)|
Vacuum (negative gauge) for ranges 5 to 2,500 psig (35 kPa to 17.2 MPa)
Vacuum reference (requires external vacuum pump)
Ranges to 2,500 psi (17.2 MPa): 0.003% of FS
3,000 psi (21 MPa): 0.012% reading from 30% to 100% full scale. Below 30% FS: 0.00036% full scale
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 up to 2,500 psi (17.2 MPa): 0.0075% of reading per year|
3,000 psia (21 MPa) range: 0.005% of reading
|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 2,500 psi (17.2 MPa)|
60 seconds for 3,000 psia (21 MPa) range
|Negative Gauge Precision (optional)|
|Barometric Reference (optional)||0.002 psi (0.014 kPa) maximum error per year|
|Vacuum Reference (optional)||0.0002 psi (0.0014 kPa) maximum error per year (Only available on 7250i and 7250)|
|Calibration||An accredited calibration report is provided standard.|
|Maximum deviation from the true value of pressure including precision, stability, temperature effects and the calibration standard|
|Model 7250||Ranges to 2500 psi (17.2 MPa)|
90 day 0.003% FS + 0.002% reading
1 year 0.003% FS + 0.0075% reading
3,000 psi (21 MPa)
|Model 7250i||Ranges from 25% to 100% full scale|
90 day: 0.0055% reading
1 year: 0.009% reading
|Model 7250xi||Ranges from 5% to 100% full scale|
90 day: 0.0055% reading
1 year: 0.009% reading
|Volume||5 to 60 cubic inches (82 to 980 cc)|
|Low Control (absolute)||0.15 psia (1 kPa)|
|Communications||RS232 and IEEE-488, SCPI syntax. Series 7215, Model 7010, Series 6000 and DPI 510 emulation are standard.|
Firmware updates are performed via RS232 interface.
|Menus and functions||The Series 7250 is capable of displaying menus and functions in:|
English, French, Chinese, German, Japanese, Spanish and Italian.
|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|
Models 7250xi and 7250i offer advanced percent of reading precision for increased capability with a single instrument, reducing the investment required to calibrate a wide variety of pressure devices and ranges.
The Model 7250xi provides 0.005 % of reading precision from 5 % to 100 % of the instrument's range. This unmatched precision is achieved through unique quartz pressure sensing technology and multiple quartz sensors in a single instrument. Various ranges from 0 to 20 and 0 to 2 500 psi (0 to 140 kPa and 0 to 17.2 MPa) are available.
The Model 7250i provides 0.005 % of reading from 25 % to 100 % of range and is available in various ranges from 0 to 5 and 0 to 2,500 psi (0 to 35 kPa and 0 to 17.2 MPa).
For pressure below the lower threshold of 5% for the 7250xi and 25 % for the 7250i, the precision becomes 0.005 % of the lower value. For example, a 1,000 psi (7 MPa) Model 7250xi provides 0.005 % of reading from 50 to 1,000 psi (0.035 to 7 MPa); the precision for pressures from 0 to 50 psi (0 to 0.035 MPa) is 0.005 % of 50 psi (0.035 MPa).
Computer interface: Every Series 7250 is provided with both an RS-232 and IEEE-488 interface, and Series 7250 syntax follows SCPI protocol for easy programming. A LabVIEW® driver is available as a free download. As a standard feature, software written for the previous generation Series 7215, 7010 and 6000 instruments is fully supported by the Series 7250. The Series 7250 can also be set to 510 emulation mode to use software originally written for the DPI 510. Firmware updates can also be performed over the RS-232 interface (updates can be downloaded from the web site). The 7250 series is compatible with COMPASS software.