Druck DPI 740 Specifications

GE

Sensing

Features

• Accuracy: ±0.004 inHg (±0.15 mbar) absolute

• Ranges to 103 inHg (3.5 bar) absolute

• Six digit resolution LCD display

• Multiple pressure scales and aeronautical units

• Alkaline or rechargeable batteries

• Lightweight hand-held rugged design

• RS232 output

Druck Portable
Precision Barometer

DPI 740

DPI 740 is a Druck product. Druck
has joined other GE high-technology
sensing businesses under a new
name—GE Sensing.

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.

GE

Sensing

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)

DPI 740
Specifications

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