General |
| Pressure Ranges |
Three configurations are available:
8 range 7250 Sys System for pressures to 1000 psi (70 bar)
8 range 7250 Sys System for pressures to 2500 psi (170 bar)
12 range 7250 Sys System for pressures to 2500 psi (170 bar) |
| Modes |
Gauge mode
Negative gauge mode
Absolute mode through barometric reference sensor (standard)
Absolute mode through vacuum pump attached to the reference port (optional). Requires second vacuum pump that is mounted inside the cabinet. For systems that also include a gas booster, the booster must be placed outside the cabinet. |
| Precision |
8 range to 1000 psi (70 bar):
— 0.006% of reading from 3.75 psi (260 mbar) to 1000 psi (70 bar)
— 0.0002 psi (0.014 mbar) from 0 to 3.75 psi (260 mbar)
8 range to 2500 psi (170 bar)
— 0.006% of reading from 10 psi (0.7 bar) to 2500 psi (170 bar)
— 0.0006 psi (0.04 mbar) from 0 to 10 psi (0.7 bar)
12 range to 2500 psi (170 bar)
— 0.006% of reading from 0.65 psi (45 mbar) to 2500 psi (170 bar)
— 0.00004 psi (0.003 mbar) from 0 to 0.65 psi (45 mbar)
Precision is defined as the two sigma, RSS of linearity, repeatability and hysteresis throughout the operating temperature range. |
| Stability |
0.0075% of reading per year |
| Total Uncertainty |
8 range to 1000 psi (70 bar)
—3 psi (205 mbar) to 1000 psi (70 bar). 0.01% of reading
—0 to 3 psi (0 to 205 mbar): 0.0004 psi (0.027 mbar)
8 range to 2500 psi (170 bar)
— 8 psi (0.5 bar) to 2500 psi (170 bar). 0.01% of reading
— 0 to 8 psi (0 to 0.5 bar): 0.001 psi (0.07 mbar)
12 range to 2500 psi (170 bar)
— 0.5 psi (35 mbar) to 2500 psi (170 bar). 0.01% of reading
— 0 to 0.5 psi (0 to 35 mbar): 0.00005 psi (0.003 mbar)
Total uncertainty is based on one year re-calibration interval.
Expression of Total Uncertainty conforms with the recommendations of the ISO Guide to the Expression of Uncertainty in Measurement. |
| Control Stability |
The digital control valve technology utilized in the series 7250 Sys provides the following control stability:
8 Range 7250Sys to 1000 psi (70 bar):
— 0.0006 psi to 60 psi (0.04 mbar to 4 bar )
— 0.01 psi from 60 psi to 1000 psi (0.7 mbar from 4 bar to 70 bar)
8 Range 7250Sys to 2500 psi (170 bar):
— 0.0015 psi to 150 psi (0.1 mbar to 10 bar )
— 0.025 psi from 150 to 2500 psi (1.7 mbar from 10 bar to 170 bar)
12 Range 7250Sys to 2500 psi (170 bar)
— 0.0001 psi to 10 psi (0.007 mbar from 0.7 bar)
— 0.0015 psi from 10 to 150 psi (0.1 mbar from 0.7 bar to 10 bar)
— 0.025 psi from 150 to 2500 psi (1.7 mbar from 10 to 170 bar) |
| Barometric Reference (standard) |
0.002 psi (0.14 mbar) maximum error per year |
| Vacuum Reference (optional) |
10 mtorr maximum error per year. If selected, this option requires a second vacuum pump. |
| Calibration |
A calibration report with traceability to NIST is provided with the system. GE calibrates all 7250 Sys to 1000 psi (70 bar) with the Model 2465 gas piston gauge and the Model 2470 gas piston gauge for ranges higher than 1000 psi (70 bar). A NVLAP accredited calibration is available as an option. |
| Control Parameters |
Volume: 5 to 60 cu in (80 to 1000 cc)
Low control limit: 0.2 psia (13.8 mbar) |
| Communications |
IEEE-488 included. Remote syntax is SCPI format. Ruska Series 7215 and 7010 emulation are standard. |
| Languages |
The 7250 Sys is capable of displaying menus and functions in: English, French, Chinese, Spanish, German, Japanese and Italian. |
| Options |
Gas booster drive air: 100 to 120 psi (7 to 8 bar) shop air Minimum bottle (nitrogen) input of 500 psi (35 bar)
Vacuum reference (requires second vacuum pump)
DUT absolute zeroing mode MET/CAL driver |
| Display |
TFT, VGA Active Matrix, 6.4 in (162.5 mm) diagonal, 640 x 480 resolution, 65, 000 colors |
| Temperature |
Operating: 64°F to 95°F (18°C to 35°C)
Storage: -4°F to 158°F (-20°C to 70°C) |
| Humidity |
5% to 95% relative humidity, non-condensing |
| Electrical Power |
Specify 115 or 230 VAC, 50/60 Hz, 30 Amp |
| Dimensions (h x w x d) |
All configurations: 48 in x 22 in x 30 in (122 cm x 56 cm x 76 cm) |
| Weight |
8 range: <250 lb (115 kg)
12 range: <280 lb (127 kg) |
| Test Port and Reference Port |
1/4 in NPT female |
| Shop Air |
For systems with gas booster: 1/4 in NPT female |
| Warm Up Time |
Two to three hours, may be left on indefinitely |
| Pressure Medium |
System supply: nitrogen
Gas booster: shop air |
