Druck DPI-740 Precision Barometer
The Druck 740 is a portable battery powered precision
barometer, providing outstanding capabilities in a handheld
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
+/-0.005 inHg but equally important has a calibration stability of
better than 100 ppm per year. 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. A variety of pressure scales is available to
enable the operator to display the atmospheric pressure in any
desired units or in height equivalent units for altimetry and
surveying applications. With the serial RS 232 interface, it is
possible to utilize the DPI 740 data as input parameters to
computer systems or simply print out the displayed values.
The DPI 740 ABS molded case has been designed for hand-held
use, either in field applications, or for use on the bench with its
integral folding stand.
Features:
• Accuracy +/-0.004 inHg absolute
• Ranges to 103 inHg Absolute
• 6 Digit resolution LCD display
• Multiple pressure scales and aeronautical units
• Alkaline or rechargeable batteries
• Lightweight hand-held rugged design
• RS 232 output
Technical Specifications:
| Range: |
22-34"Hg Absolute |
| Optional Ranges: |
1 - 38"HgA, 77"HgA, 103"HgA |
| Overpressure: |
Up to 118"HgA will not cause a calibration change. |
| Pressure Media: |
Compatible with non-corrosive gases.
Insensitive to media density. |
| Accuracy: |
+/-0.02% F.S. (Includes All Effects from 15 to 120 F) |
| Stability: |
Better than 100 ppm per annum |
| Display: |
999999 capability LCD digits 0.54" high |
| Display Overload: |
110% F.S. for Each Range.
Above This, Error Code Will Flash. |
| Resolution: |
0.0003"Hg Absolute |
| Response: |
2 Readings Per Second |
| Calibration Controls: |
Front panel PIN protected, Also via RS-232. |
| Operating Modes: |
Local pressure (QFE)
Sea level pressure (QFF) from user set height
Altitude above user set datum |
| Process Features: |
Max/Min, Reading Store, Tare and Programmable Filter |
| Scales: |
inHg, psi, atm, torr, inH2O, ftH2O (40 and 68 F), mH2O,
cmH2O, mmH2O,mHg, cmHg, mmHg, kg/in2, kg/cm2, bar,
hPa, inPa, kPa, Pa, mbar Altitude values in ft. and m.
Tare available for surveying. |
| Position Effect: |
Negligible |
| Power Supply: |
3 each 1.5V Alkaline AA batteries.
20 hours nominal continuous operation.
Optional rechargeable NiCad batteries |
| Temperature Operating: |
15 to 120 F |
| Storage: |
-40 to +160F |
| Sealing: |
Generally to NEMA 4 |
| Safety: |
EN61010, EN50081-1, EN50082-1, CE |
| Size: |
7.5" x 3.5" x 1.4", 1.1 Lbs. |
| Pressure Connection: |
Accepts 1/4 in. O/D / 5/32 ID tubing |
| Serial Output: |
RS 232 via 6-Way LEMO socket |
|
