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| 7252 Dual Output Digital Pressure Controllers |
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The new Series 7252 provides a unique and flexible approach to performing automated calibrations over a wide pressure range. The 7252 incorporates two pressure ranges with independent controllers for each range. Therefore, two calibrations can be performed at the same time.
A wide variety of pressure range combinations can be provided from as low as 0 to 10 inH2O up to 0 - 2500 psi (25 mbar- 172 bar) providing maximum flexibility in a single instrument. Two different models are available, the 7252i and 7252. The 7252i features percent of reading performance from 25% to 100% of each installed range, whereas the economical 7252 provides 0.003% of full scale precision for each range. Both units feature a long term stability of 0.0075% of reading per year.
Similar to the single output Series 7250, the 7252 also features an active matrix color screen display with enhanced navigation menus for ease of operation. Other new features include 10 ppm control stability on each range 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.
The Series 7252 is an ideal choice for calibrating pressure devices where a high level of throughput and performance over a wide pressure range is required.
- Ranges from 0 - 10 inH2O to 0 - 2500 psi(25 mbar-172 bar)
- Two performance models available, 7252i and 7252
- Fast control : <15 seconds with zero overshoot into a 15 cu.(245cc) in. volume
- Stability : 0.0075% of reading per year
- Control Stability: 0.001% FS of each range
- Labview® driver available
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Pressure Ranges |
| Standard Pressure Ranges |
Model 7252i
Select two of any Full Scale pressure range from 5 to 2500 psig (400 mbar to 172 barg), or permanent absolute range from 15 to 50 psia (1 to 4 bara). Low Pressure (LP) ranges starting at 10 inH2O (25 mbarg) are also available. Please refer to the 7250LP data sheet for additional information on LP ranges and specifications.
Model 7252
Select two of any Full Scale pressure range from 5 to 2500 psig (400 mbar to 172 bar). Or, any permanent absolute range from 15 to 50 psia (1 to 4 bara). |
| Optional Modes |
Absolute using barometric reference sensor for ranges from 15 to 2500 psig (1 to 172bar)
Absolute using Vacuum Reference option for ranges from 5 to 2500 psig (400 mbar to 172 bar)
Negative gauge |
Performance |
| Precision |
Model 7252i
Ranges from 5 to 2500 psi (400 mbar to 172 bar) From 25% to 100% FS: 0.005% of reading Below 25% FS: 0.005% of 25% FS
Model 7252
Ranges 5 to 2500 psi (400 mbar to 172 bar) 0.003% of FS
Model 7252i
0.36/1 psi (25/70 mbar) range: 0.005% of reading from 10% to 100% of maximum FS
Precision is defined as the combined effects of linearity, repeatability and hysteresis throughout the operating temperature range.Expression of uncertainty conforms with the recommendations of the ISO Guide to the Expression of Uncertainty in Measurement. |
| Stability |
0.0075% of reading per year |
| Control Stability |
Active mode: 0.001% of each range
0.36/1 psi (25/70 mbar) range: 0.004% of each
Range Passive mode: No additional uncertainty |
| Display Resolution |
User selectable to 1:1,000,000 |
| Control Response |
15 seconds or less with zero overshoot into a 15 in3 (245 cc) volume in 10% increments |
| Negative Gauge Precision (Optional) |
Model 7252i
0.005% of 25% FS or 0.0005 psi* (0.0345 mbar)
Model 7252
0.003% of positive FS
*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 |
Calibration |
| Calibration |
A calibration report with traceability to National Institute of Standards and Technology (NIST) is provided. bar). 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 7252i
Ranges 0.36 to 2500 psi (25 mbar to 172 bar) (25%-100%FS)
90 day: 0.006% reading
1 year: 0.009% reading
Series 7252 Ranges 5 to 2500 psi (400 mbar to 172 bar)
90 day: RSS 0.003% FS + 0.002% reading
1 year: RSS 0.003% FS + 0.0075% reading |
| Control Parameters |
Volume:
5 to 60 cu.in. (82 to 980 cc)
Control low limit:
0 psi (0 mbar) gauge
0.15 psi (10 mbar) absolute |
Communications |
| Communications |
RS232 and IEEE-488, SCPI syntax
Firmware updates are performed via RS232 interface |
| Drivers |
LabVIEW driver
MET/CAL driver optionally available |
Languages |
| Menus and Functions |
The Series 7252 is capable of displaying menus and functions in: English, Japanese, French, Spanish, Chinese, Italian and German |
Options |
| Options |
- Barometric reference (absolute and negative gauge)
- Vacuum reference* (absolute)
- Negative gauge only
- NVLAP accredited calibration
- Rack mount kit
- MET/CAL driver
- Intecal software
- Liquid trap assembly
*Requires external vacuum pump |
General |
Display |
TFT, VGA, Active matrix, 6.4 in (163 mm), 640 X 480 resolution, 65,000 colors |
| Temperature |
Operating: 64°F to 97°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 |
Series 7252/7252i: 20 lb (9 kg) |
| Power |
90 to 260 VAC, 50/60 Hz, 150 W |
| Test Port and Supply Connection |
1/4 inch 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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