Digital Pressure Gauges
DPG1100AD Series, NEMA 4X, Low Voltage AC/DC Powered
DPG1100ADBL Series, NEMA 4X, Low Voltage AC/DC
Powered with Backlit Display
INSTRUCTION
SHEET
M3763/1101
Description
The DPG1100AD and DPG1100ADBL are designed for
industrial applications where a continuous display of
pressure (or vacuum) is required. The temperature
compensated piezoresistive transducer features 316
stainless steel wetted parts.
Installation Precautions
Tighten/remove with wrench on hex fitting only. Do not
attempt to rotate gauge by turning housing. Use fittings
appropriate for the pressure range of the gauge. Do not
apply vacuum to gauges not designed for vacuum
operation. NEVER insert objects into the gauge port or
blow out with compressed air. Permanent damage not
covered by warranty will result to the sensor.
The DPG1100AD and DPG1100ADBL can be powered
by any AC source of 8 to 24 VAC 50/60 Hz, or any DC
source of 9 to 32 VDC. The gauges can be used with
inexpensive unregulated low voltage AC or DC power
supplies. The type and magnitude of the supply voltage
have negligible effects on the gauge calibration as long
as it is within the voltage ranges stated above. No
polarity needs to be observed when connecting a DC
supply.
NEVER connect the gauge wires directly to 115 VAC or
permanent damage not covered by warranty will result.
After the gauge is installed, route the wires safely and
connect the AC adapter’s wires to the gauge cable.
Lastly, plug the AC adapter into a 115 VAC outlet.
The only important consideration is to ensure that the
gauge supply voltage does not fall below 8 VAC RMS if
AC power is used, or 9 VDC if DC power is used.
Operation with less than these values may cause erratic
or erroneous readings.
If your application requires operation of multiple gauges
from the same power supply, consult the factory for
wiring recommendations.
Operation
When a supply voltage is applied, the gauge will be
ready to use. If the gauge display is off, press the center
button to turn the gauge on. If the gauge is in the power-
on state and the power is disconnected, the gauge will
turn on when power is reapplied. The gauge can be left
on continuously or turned off when not in use.
DPG1100ADBL model display backlighting will be on
whenever gauge is on.
Calibration
Remove the calibration potentiometer covers on the front
of the unit to access the zero and span controls.
GAUGE reference units may be re-zeroed without
affecting the span calibration. The gauge port must be
open to the ambient with no pressure or vacuum
applied. Adjust the Zero control until the gauge reads
zero with the minus (–) sign occasionally flashing.
Span calibration should only be attempted if the user
has access to a pressure reference of known accuracy.
The accuracy of the calibration equipment should be at
least four times the gauge accuracy. Zero calibration
must be done before span calibration. Record readings
at three to five points over the range of gauge and adjust
span control to minimize error and meet specifications.
ABSOLUTE reference gauges require vacuum
generation and atmospheric pressure measurement
equipment for accurate calibration and thus are more
difficult to calibrate in the field.
Gauges may be returned to Omega Engineering for
recalibration. N.I.S.T. traceability is available.
3 ft long,
2-conductor,
22 AWG
shielded cable
Optional Power Supply Kit DPG1000-PS
The kit includes a UL and CSA listed 115 VAC (50/60
Hz) wall-mount power supply with U.S.-style 2-prong
plug. Output is 12 VDC at 200 mA. The two-conductor
wire is approximately 6 feet long with stripped wire
ends. Use a pair of pliers to connect gauge and power
supply wires using the included moisture-resistant
connector.
2.0"
1
/
4
" NPT
3.0"
3.5"
0.75"
PSIG
Span
Zero
OMEGA Engineering Inc. / Made in USA
0.75"
Turn at hex
fitting only!
SPECIFICATIONS
Ranges & Resolution
–30.0 inHg vac to 15.0 psig
–30.0 inHg vac to 100.0 psig
30.0 inHg vacuum, ±15.00 psig
3.00, 5.00, 15.00, 30.0, 100.0, 199.9 psig
300, 500, 1000 psig
Absolute reference: 15.00, 100.0 psia
Optional Units
Most engineering units such as kPa, atm, bar, mbar,
inHg, mmHg, inH
2
O, ftH
2
O, torr, kg/cm
2
, cmH
2
O, oz/in
2
Display (type, size, update rate)
3
1
/
2
digit LCD,
1
/
2
" digit height
3 readings per second nominal display update
ADBL: Red LED display backlighting when gauge is on
Accuracy (linearity, hysteresis, repeatability)
±0.25% of full scale or better, ±1 least significant digit
Temperature Stability (relative to 77°F or 25°C)
±1% FS for offset & span, 32 to 158°F (0 to 70°C) typical
±2% FS for offset & span, 32 to 158°F (0 to 70°C) typical
for 3 and 5 psi ranges
Controls & Location
Front button turns gauge on or off
Front-accessible calibration potentiometers
Non-interactive zero & span, ±10% range
Power
AD: Approximately 5 mA
ADBL: Approximately 80 mA
Operates on 8 to 24 VAC 50/60 Hz or 9 to 32 VDC
Optional wall mount power supply is available to operate
on 115VAC
Weight (approximate)
Gauge: 9 ounces, shipping weight: 1 pound
Housing
NEMA 4X
UV stabilized polycarbonate/ABS case, light gray color
Clear polycarbonate window to protect display
Gasketed rear cover, six captive stainless steel screws
Pressure/Vacuum Connection and Material
1
/
4
" NPT male, all wetted parts are 316 SS
Overpressure & Burst
5000 psig for metric units using 3000 psig sensor
7500 psig for metric units using 5000 psig sensor
All others 2x rated pressure minimum
Burst: 4x rated pressure minimum or 10,000 psi,
whichever is less
Storage temperature:
–40 to 203°F (–40 to 95°C)
Operating temperature:
–4 to 185°F (–20 to 85°C)
Compensated temperature:
32 to 158°F (0 to 70°C)
