Pressure Ranges
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| Model 7250 |
Any Full Scale pressure range from 20 to 2,500 psig (138 kPa to 17.2 MPa). |
| 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 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. |
| 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) |
Performance
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| Precision |
Model 7250
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
Model 7250i
From 25% to 100% full scale (FS): 0.005% reading
Below 25% FS: 0.005% of 25% FS
Model 7250xi
From 5% to 100% full scale (FS): 0.005% 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.
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| 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) |
Model 7250
0.003% of FS
Model 7250i
0.005% of 25% FS or 0.0075 psi (0.05 kPa), whichever is greater
Model 7250xi
0.005% of 5% FS or 0.00075 psi (0.0005 kPa), whichever is greater
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| 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) |
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