aci GP Series Installation instructions

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 1
Version: 3.0
I0000230
GENERAL INFORMATION
The GP Series pressure sensor is a 4-20mA current
output device that is designed to provide excellent
accuracy and reliability in commercial, industrial, and
process control applications where performance is
critical. The GP Series is available in two pressure
sensing types: Gage (PSIG) and Sealed Gage (PSIS).
Gage sensors (PSIG) measure pressure relative to
ambient pressure through a port that is open to the
atmosphere, and are used in lower pressure
applications where measurement in a vacuum is not
required. Sealed sensors (PSIS) measure pressure
relative to a port that is connected to a sealed perfect
vacuum chamber. Sealed pressure transducers are
calibrated to have 4 mA at +14.5 PSIA.
OPTIONAL ACCESSORIES
Pressure Snubber
ACI recommends the use of the A/0.25” Snubber
(Water or Air/Gas) with all GP series sensors. The use
of a pressure snubber is a cost-eective solution that
can extend the life of your sensor by smoothing out
pressure spikes, surges and pulsations, and prevent
debris from collecting in the sensor diaphragm
opening. The A/0.25” Snubbers are made of 316 Stainless Steel and should be used with compatible
materials.
Syphons
The A/Syphon must be used to protect the sensor from extreme operating temperatures when the
operating temperature of the steam being monitored is higher than the maximum operating temperature
of the GP pressure sensor. There are three bend congurations available (90˚, 180˚, and 270˚) to allow the
mounting of the sensor vertically away from the main pipe.
NEMA 4 Enclosure
ACI recommends the use of a NEMA 4 enclosure to protect the gage pressure sensor in applications where
debris and moisture could contact the sensor or electrical connections. The A/GP-(xx)-NEMA 4 GP Series
pressure sensor is mounted in a NEMA 4 Rated, steel enclosure with one ½” conduit knockout. A ¼” male
NPT Stainless Steel tting is provided for installation to your pipe, tank, or reservoir.
FIGURE 1: PRODUCT DIMENSIONS
GP SERIES GAGE PRESSURE
TRANSDUCER
Installation & Operation Instructions
Phone: [phone]
Website: workaci.com
1/4” - 18 NPT
Male Thread
2.77” (70.36mm)
Ø0.87”
(22.07m
m)
0.71”
(18.03mm)
1.06”
(27.00mm)
0.78” (19.81mm)
0.88”
(22.35mm)

FIGURE 2: ASSEMBLY
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 2
Version: 3.0
I0000230
MEDIA COMPATIBILITY
The bulk micro-machined transducer features a stainless steel diaphragm with welded construction that
contains no O-rings, which makes them compatible with any gas or liquid that’s compatible with 304L
stainless steel. Some compatible gasses and liquids include refrigerants, glycol, motor oil, diesel, hydraulic
uid, brake uid, water, waste water, hydrogen, nitrogen and air.
INSTALLATION
LOCATION
Install the sensor in a location where it will not be exposed to extreme temperatures, vibration or shock.
Install the pressure sensor above or on the side of pipes, in a location where liquid will not drip on the unit.
Condensation can potentially build up and run down the harness, position the unit and harness so water
does not pool on the back of the sensor. Do not install the sensor at the end of a long run of pipe.
CONNECTION
The GP uses a standard ¼”-18 NPT external
tting. Standard pipe ttings and installation
procedures should be used during installation.
Install pipe tape, thread sealant or other
suitable pipe compound when connecting the
sensor to the pressure source or any of the
accessories. For pressure ranges more than 500
PSI (3447.4 kPa), we recommend the use of a
sealant such as Loctite Hydraulic Sealant. Do
not use excessive amounts of sealant or you
might block the pressure going into the
transducer. Install the device using a wrench on
the hex ats provided. Do not use a strap
wrench on the body. When installing the GP
sensor, the torque limit is 150 in lbs (16.95 Nm),
Do Not over tighten. Overtightening metal
ttings may cause a slight zero shift. The use of
plastic ttings typically results in no noticeable
zero shift. The torquing eect does not
appreciably aect linearity or sensitivity. In
liquid pressure monitoring applications, air
present in the lines will cause erratic readings,
use bleed ttings to bleed o any air that has
been trapped before transducer installation.
WIRING INSTRUCTIONS
The transducer requires a supply voltage of +13
to 30 VDC with a minimum supply current of 25
mA (per unit) to power the loop. The transducer
is equipped with a Packard connector for easy
installation, and is designed for use with the GP
Harness. Install the GP Sensor onto the harness
then make the proper connections to the
harness. Connect the Power lead (Red) to the plus terminal of the supply voltage. Connect the Return lead
(White) to the Analog Input(+) terminal of the current measuring device(controller). Connect the
Common(-) terminal of the current measuring device to the Common(-) terminal of the supply voltage. If
the unit is equipped with a Shield Wire, it should be connected to the system or earth ground. See Figure
3 (p. 3), wiring diagram.
Note: Black wire is not used.
SHUT OFF VALVE
SHUT OFF VALVE
PRESSURE
TRANSDUCER
PRESSURE
TRANSDUCER
PRESSURE SNUBBER
SYPHON (OPTIONAL)
(OPTIONAL)
SUPPLY LINE
SUPPLY LINE

FIGURE 3: WIRING DIAGRAM
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 3
Version: 3.0
I0000230
Optional 250 Ohm or 500 Ohm
Load Resistor for a 1-5 VDC or
2-10 VDC Output
TROUBLESHOOTING
PROBLEM
No Output or Output Signal Reading Low:
Output Signal is Inaccurate:
SOLUTION(S)
•Conrm the DC supply voltage is:.
4-20 mA Output: 250 Ohm Load: +13 to 30VDC | 500 Ohm Load: +18
to 30 VDC.
•Disconnect the sensor from the line to ensure No deris or sediment is
blocking the inlet port of the transducer.
•Determine that the proper output is being transmitted based on the
predetermined span. Measure the output of the transmitter with a
handheld multimeter and compare the measured output to calculate
output.
COM
RED WIRE
WHITE WIRE
SHIELD
BLACK WIRE NOT USED
FOR 4-20mA
POWER SUPPLY
+13 TO 30 VDC
- +
AUTOMATION
PANEL
AI1

W.E.E.E. DIRECTIVE
At the end of their useful life the packaging and product should be disposed of via a suitable recycling
centre. Do not dispose of with household waste. Do not burn.
WARRANTY
The GP Series Pressure transducers are covered by ACI's Two (2) Year Limited Warranty. The warranty can be
found in the front of ACI's Sensors & Transmitters catalog, as well as on ACI's website, www.workaci.com.
PRODUCT SPECIFICATIONS
250 Ohm Load: +13 to 30 VDC
500 Ohm Load: +18 to 30 VDC
25 mA minimum
4 to 20 mA (2-Wire, Loop Powered)
15 to 60 psig: < +/-1.0% FS
15 to 60 PSIG: < +/- 1.0% FS
75 to 300 PSIG: < +/- 0.5% FS
500 PSIS³: < +/- 0.5% FS
+/- 0.03% FS @ 0 PSIG; +/- 0.12% FS @ 1000 PSIG
-40 to 221˚F (-40 to 105˚C) | -40 to 176˚F (-40 to 80˚C)
304L Stainless Steel | 1/4"-18 NPT
800 Ω @ 24 VDC | Formula: (Supply VDC - 8 VDC) / 0.020 A
15 to 300 psig: 3x FS | 500 psis: 3x FS
0 to 95% RH, non-condensing
Any gas or liquid compatible with 304L Stainless Steel
150 lbs-in (16.95 Nm)
SENSOR NON-SPECIFIC INFORMATION
Supple Voltage:
Supply Current:
Output Signal:
Accuracy1@ 22°C (71.6°F):
Thermal Error (-40° to 105°C):
Stability (250 Hours @ 225°F (125°C)):
Operating | Storage Temperature
Ranges:
Process Fitting Material | Thread Size:
Maximum Load Resistance:
Proof Pressure:
Operating Humidity Range:
Media Types:
Recommend Torque Specication:
Note 1: Accuracy includes Hysteresis, Repeatability, and Non-linearity (BFSL)
Note 2: Additional error over temperature range.
Note 3: PSIS transducers are not vented to atmosphere, but are calibrated to have 4 mA at +14.5 PSIA
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 4
Version: 3.0
I0000230