Product Overview: Druck DPI740 Precision Pressure Indicator
DPI740
The DPI 740 is a portable battery powered precision barometer, providing outstanding capabilities in a hand-held package.This instrument can confidently be used in both laboratory and field applications as a first-class barometric reference device, with the recommended recalibration period being one year.
The DPI 740 is a portable battery powered precision barometer, providing outstanding capabilities in a hand held package. The fundamental sensor technology employed within this instrument is the Druck resonant pressure transducer (RPT). This vibrating element sensor not only provides accuracies of ±0.004 inHg (±0.15 mbar) but equally important has a calibration stability of better than 100 ppm per year. The DPI 740 is widely used in laboratory and remote field applications for precision pressure reference.
Pressure Measurement
| Operating Ranges | 22 to 34 inHg (750 to 1150 mbar) absolute 1 to 38 inHg (35 to 1310 mbar) absolute 1 to 77 InHg (35 to 2620 mbar) absolute 1 to 103 inHg (35 to 3500 mbar) absolute |
|---|---|
| Maximum Safe Working Pressure | 130 inHg (4375 mbar) absolute |
| Pressure Media | Compatible with non-corrosive gases Insensitive to media density |
| Readout and Display | 999999 capability LCD digits 0.54 in (13.6 mm) high with additional 16 text characters. |
| Display Overload | Instrument capable of nominal 110% full scale (FS) for each range. Above this, error code will flash. |
| Resolution | 0.0003 inHg (0.01 mbar) |
| Response | 2 readings per second nominal on digital display |
| Operating Modes | A) Local pressure (QFE) B) Sea level pressure (QFF) from user set height C) Altitude above user set datum |
| Process Features | Maximum/Minimum, tare and programmable filter available in all operating modes. |
| Pressure Units | 24 pressure units plus altitude in feet (ft) or meters (m) |
Performance
| Accuracy | ±0.02% FS For all pressure ranges includes: Combined non-linearity, hysteresis, repeatability, and temperature effects over 15°F to 120°F (-10°C to 50°C). Optional enhanced barometric accuracy available (see Option A). |
|---|---|
| Stability | Better than 100 ppm per annum. |
| Temperature Range | Operating: 15°F to 120°F (-10°C to 50°C) Storage: -40°F to 160°F (-40°C to 70°C) |
| Safety | Electrical and mechanical safety: EN61010 EMC emissions: EN50081-1 EMC immunity: EN50082-1 Certification: CE Marked |
| Position Effect | Negligible |
| Power Supply | Three each 1.5 V alkaline AA batteries for 20 hours nominal continuous operation. Programmable power down prolongs battery life. Battery low indicated by display symbol. Optional rechargeable NiCad batteries and external power adapter/charger unit available (see Option B). |
| Communication Interface | RS232 via six-way LEMO socket (see Option C) |
Physical
| Pressure Connection | Accepts 1/4 in OD / 5/32 in ID tubing (6 mm OD / 4 mm ID) |
|---|---|
| Weight | 1.1 lb (0.5 kg) nominal |
| Dimensions | 7.5 in x 3.5 in x 1.4 in (190 mm x 90 mm x 36 mm) nominal |
