DPG1000AD, DPG1001AD, DPG1000ADBL, DPG1100AD, DPG1100ADBL
2
Installation and Precautions
4
Read these instructions before using the gauge. Contact
the factory for assistance.
4
These products do not contain user-serviceable parts.
Contact us for repairs, service, or refurbishment.
4
Gauges must be operated within specified ambient tem-
perature ranges.
4
Outdoor or wash down applications require a NEMA 4X
gauge or installation in a NEMA 4X housing.
4
Use a pressure or vacuum range appropriate for the
application.
4
Use fittings appropriate for the pressure range of the
gauge.
4
Due to the hardness of 316 stainless steel, it is recom-
mended that a thread sealant be used to ensure leak-free
operation.
4
For contaminated media use an appropriate screen or
filter to keep debris out of gauge port.
4
Remove system pressures before removing or installing
gauge.
4
Install or remove gauge using a wrench on the hex fitting
only. Do not attempt to turn gauge by forcing the housing.
4
Good design practice dictates that positive displacement
liquid pumps include protection devices to prevent sensor
damage from pressure spikes, acceleration head, and
vacuum extremes.
p
Avoid permanent sensor damage! Do not apply vacuum to
non-vacuum gauges or hydraulic vacuum to any gauges.
p
Avoid permanent sensor damage! NEVER insert objects
into gauge port or blow out with compressed air.
Gauges are not for oxygen service. Accidental rupture of
sensor diaphragm may cause silicone oil inside sensor to
react with oxygen.
p
NEVER connect the gauge wires directly to 115 VAC or
permanent damage will result.
Power
The AD series is powered by 8-24 VAC 50/60 Hz or 9-32
VDC.
The type and magnitude of the supply voltage have negli-
gible 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 power supply. An inexpensive
unregulated low voltage AC or DC power supply can be used.
After the gauge is installed, route the wires away from heat
sources and moving equipment and connect the low-voltage
power source to the gauge wires.
Ensure that the gauge supply voltage does not fall below 8
VACRMS 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.
When operating multiple gauges from the same power
supply, refer to the mA rating in the specifications to ensure
adequate power.
Note that standard 24 VAC transformers often operate at
voltages well over the gauge’s 24 VAC limit.
Absolute Reference Gauges
These models have engineering units shown on the rear
label such as PSIA, INHGA, INH2OA, ZIN2A, BARA, MBARA,
KPAA, TORR or TORRA, MMHGA, KGCMA, ATMA. The
“A” indicates absolute reference. These ranges display
atmospheric pressure when the gauge port is open to the
atmosphere. They display zero at high vacuum.
When the gauge port is open to the atmosphere, it is normal
for the reading to constantly change in response to atmo-
spheric pressure changes. Do not adjust the calibration
controls!
Display Backlighting (ADBL models)
Red LED display backlighting on ADBL models is on whenev-
er the gauge is on. Backlighting may not be apparent under
bright lighting conditions.
Operation – Ranges up to 1999
Press the button on the front of the gauge to activate the
display.
The gauge can be shut off at any time by pressing the
button again.
If the gauge is in the power-on state and the power is dis-
connected, the gauge will turn on when power is reapplied.
The display indicates the pressure reading updated approxi-
mately 3 times per second. The gauge can be left on contin-
uously or turned off when not in use.
Display backlighting for BL models is on whenever the gauge
is on. The backlighting will not be apparent under bright
lighting conditions.
Operation – Ranges 2000 and up including
3000 psi, 5000 psi
Press and hold the front button for approximately 1 second if
the gauge does not turn on when power is applied.
When the supply voltage is applied, the gauge will go
through a power-up sequence. The full-scale range is indi-
cated, display segments are tested, and then the reading
and units are displayed.
The gauge may be zeroed at power-up by following the
procedure below. This feature corrects small deviations
from zero due to temperature changes. Absolute reference
gauges do not use the zero feature since they normally read
atmospheric pressure.
The gauge port must be exposed to normal atmospheric
pressure with no pressure applied. The zero function is only
used at power-up and the stored zero correction is erased
when the gauge is shut off.
Press and hold the front button.
The full-scale range is indicated and the display is tested.
Continue to press the button until
oooo
is displayed and
then release the button.
The gauge is now zeroed and ready for use with the actual
pressure is displayed.
Attempting to zero the gauge with pressure greater than
approximately 3% of full-scale applied will result in an error
condition, and the display will alternately indicate
Err0
and
the actual measured pressure. The gauge must be powered
down to reset the error condition.
Following the start-up initialization, the display indicates the
pressure reading updated approximately 3 times per second.
If excessive vacuum is applied to a pressure-only gauge,
the display will indicate
–Err
until the vacuum is released.
Applying vacuum to a gauge designed for pressure may
damage the pressure sensor. If excessive pressure is
applied (112.5% over range), an out-of-range indication of
I – – –
or
I –.–.–.–
will be displayed depending on model.
Display backlighting for BL models is on whenever the gauge
is on. The backlighting will not be apparent under bright
lighting conditions.
To shut off the gauge at any time, press and hold the button
until the display indicates
OFF
(about 5 seconds) and then
release.
CAUTION:
1
/
4
”NPT
3.38”
0.75”
PSIG
Span
Zero
2.88”
1.65”
Turn at hex
fitting only!
1000AD, 1001AD, 1000ADBL
OMEGA Engineering Inc./Made in USA
3
1
/
2
digit or
4
1
/
2
digit display
1
/
4
”NPT
3.0”
3.5”
2.0”
Turn at hex
fitting only!
PSIG
Span
Zero
OMEGA Engineering Inc. / Made in USA
0.75”
1100AD and 1100ADBL (NEMA 4X)
3
1
/
2
digit or
4
1
/
2
digit display
Allow 1”
clearance
3 ft long,
2-conductor,
22 AWG cable
Allow 1”
clearance
3 ft long,
2-conductor,
22 AWG cable
WARNING:
This product can expose you to chemicals including
lead, nickel and chromium, which are known to the State of
California to cause cancer or birth defects or other reproductive
harm. For more information go to www.P65Warnings.ca.gov
