Setra Systems GCT225 User manual

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Installation Guide
1-800-257-3872 Toll Free
1-978-264-0292 Fax
www.setra.com Web Site
Model GCT225
Ultra-Hi h Purity
Pressure Transducer
ISO
✓
Certified
9001:
2000

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Setra Model GCT225
Ultra High Purity Transducers
1.0 GENERAL INFORMATION
Your Setra Pressure Transducer has been carefully tested and calibrated before
shipment. Model GCT225 performance specifications are listed on page 6 of
this Guide.
Setra Systems GCT225 pressure transducers sense gauge, compound, or
absolute pressure and convert this pressure to a proportional high level analog
output.Two output versions are offered: A voltage output of 5 VDC FSO (Full
Scale Output) and 10 VDC FSO, and current output of 4 to 20 mA
Note: These instructions are also available on our web site at www.setra.com.
1.1 EMC Certification
This product complies with EN61326 Electrical Equipment for Measurement,
Control and Laboratory use – EMC Requirements for Minimum Requirements
and Industrial Locations. Special caution should be taken to meet Standard
EN61000-4-5: 1995 Surge Immunity if any of the following conditions apply to
the installation: The product is installed outside; all or any part of the cable is
exposed to the outside; the cable is greater than 30 meters in length. In order
to meet the Surge Immunity requirements, the following conditions must be
followed during installation:
1. Shielded cable must be used, and the shield must be tied to earth ground (not power
supply ground) on at least one end of the cable shield/drain wire. The shield must be
maintained all the way from sensor to the power supply.
2. If unshielded cable is used, an earth grounded metal conduit fitting can be used to
replace the shielded cable.
3. For a sensor with a metal body or enclosure, the body/enclosure must be grounded
to earth. If a protective metal housing is used, the metal housing should be grounded
to earth
4. If a protective plastic housing is used, the housing must be able to withstand at least
2 KV from the housing to earth ground, without damaging the circuit.
2.0 MECHANICAL INSTALLATION
2.1 Media Compatibility
Model GCT225 transducer is designed to be used with any gas or liquid
compatible with 316L Stainless Steel. Never submerge the transducer in any
liquids.
2.2 Environment
The operating temperatures of the GCT225 are as follows:
Operating Temperature Range °F (°C) -40 to +185 (-40 to +85)
Compensated Temperature Range °F (°C) +15 to +150 (-9 to +65)
Current unit ordered with Option N1:
Operating Temperature Range°F (°C) -22 to +176 (-30 to +80)
Compensated Temperature Range°F (°C) +15 to +150 (-9 to +65)

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Diagram 1
CONNECTOR PIN WIRING FOR VOLTAGE OUTPUT TRANSDUCERS
CABLE BAYONET
CONNECTION WIRE PIN
+EXCITATION: Connect to VDC Power Supply RED A
+OUTPUT: Connect to Controller or Monitor GREEN B
-OUTPUT: Connect to Controller or Monitor WHITE C
-EXCITATION: Connect to Return of Power Supply BLACK D
CASE GND: Connect to System or Earth Ground SHIELDING SHELL
EXCITATION: 10-30 VDC FOR 0.2 TO 5.2 VDC and 0 to 5 VDC
13-30 VDC FOR 0.2 TO 10.2 VDC and 0 to 10 VDC
Note: Model GCT225 can be wired as a 3-
wire device by connecting –OUTPUT
and –EXCITATION and drain wire to a
common ground. However, accuracy
will be reduced due to increase in
resistance.
2.3 Pressure Fitting
Mounting —Model GCT225 transducer can be installed with a male or female
#4 Face Seal Fitting, 1/4”NPT male or female fitting, or a 1/4”tube stub.
When installing units with Face Seal Fittings:
a.) Align piping system to transducer connections
b.) Hand tighten nuts
c.) Torque nuts by placing wrenches on nuts only (or on nut and
wrench flats of transducer body for units fixed male face seals).
Never hold the unit by the electronic housing during installation.
2.4 Venting
Model GCT225 Transducer is vented through the swivel cover.
3.0 ELECTRICAL INSTALLATION
3.1 Voltage Output Units
The Model GCT225 voltage output transducer is supplied with a 6ft. multicon-
ductor cable or a Bayonet style connector. See Diagram 1 & 2 for wiring
diagrams.
D
A
B C
(+ exc.)
(common)
(common)
(+ out)
(shield)
Red + Excitation
Black - Excitation
Monitor or
Control
Device
+
-
Shield
reen
+ Out
White
- Out
Diagram 2

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3.2 Current Output Units
The Model GCT225 is a two-wire loop-powered 4 to 20mA current output unit
and delivers rated current into any external load of 0-800 ohms. The Model
225 is available with 6ft. of multiconductor cable or Bayonet style connector.
Diagram 3 shows electrical connection wiring for current output transducers.
The power supply must be a DC voltage source with a voltage range between
10 VDC and 30 VDC measured between the + and - terminals. The unit is
calibrated at the factory with a 24 VDC loop supply voltage and a 250 ohm
load.
Current must flow in one direction only - Please observe polarity. (See
Diagram 4) We suggest that the cable shield Drain Wire be connected to the
system’s loop circuit ground for optimum electrical noise rejection. Trans-
ducer case connection can be achieved by tying the cable drain/shield wire to
the cable mounted Bendix connector shell.
Note 1: The transducer case and integral Bayonet connector Shell is electrically connected.
Note 2: ETL Listed to UL1604 Standards: The current output unit may be installed in Class 1 Hazardous
(Classified) Group A, B, C, D Division 2 locations, if the unit was ordered for these locations. (This is
denoted by an N1 designation in the Part Number, 12th and 13th digits). Safety barriers are not
required, as long as the unit is operated under normal conditions with a maximum excitation voltage
of 30 VDC between the input terminals.
Note 3: ATEX 94/9/EC Approved: Special hazardous area instructions for GCT225 transducers (with the N1
suffix) with ATEX approval: The GCT225 transducer (with the N1 suffix) is designed for use in
hazardous areas indoor applications with ATEX rating: Non-incendive II 3G Eex nL IIC T4 X -
30°C<Ta<+80°C. (Note: Units ordered with the Mini Din Shell are not ATEX approved for use in
hazardous locations.)
•The device can only be used for“Indoor Applications”.
•Power must be turned off before connecting or disconnecting.
•For the connector version, the connector must be secured before applying power
and DO NOT SEPARATE WHEN ENERGIZED.
•The shielded cable must be used and the drain wire of the cable must be connected
to the earth ground.The drain wire of the cable must connect to the connector metal
outer shell for the connector version.
•The maximum allowable transient disturbance must not exceed more than 40% of
the maximum excitation voltage.•
4.0 CALIBRATION
All Setra pressure transducers are carefully calibrated to the specific input
pressure range vs. output voltage or current at the factory so little or no field
calibrating is necessary. Zero and span adjustments can be made by turning
the rotatable cover to expose zero and span pots. We recommend closing the
rotatable cover after calibration adjustments are finished.
Diagram 3
Minimum Supply Voltage = 10 + 0.02 x Loop Resistance
Maximum Supply Voltage = 30 + 0.004 x Loop Resistance
CONNECTOR PIN WIRING FOR CURRENT OUTPUT TRANSDUCERS
CABLE BAYONET
CONNECTION WIRE PIN
+EXCITATION RED A
-EXCITATION BLACK D&B
CASE GND SHIELDING SHELL
and w/N1 option, see Notes 2 and 3.)
(

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PSI 5 VDC Full Scale Outputs 10 VDC Full Scale Outputs
Compound 0.2 to 5.2 0 to 5VDC 0.2 to 10.2 0 to 10VDC
Range Voltage (VDC) Voltage (VDC) Voltage (VDC) Voltage (VDC)
(Factory Set to within ±25mV) (Factory Set to within ±50mV)
-14.7 to 25 2.051 1.851 3.903 3.703
-14.7 to 50 1.336 1.136 2.472 2.272
-14.7 to 100 0.841 0.641 1.482 1.282
-14.7 to 250 0.478 0.278 0.755 0.555
-14.7 to 500 0.343 0.143 0.486 0.286
-14.7 to 1000 0.272 0.072 0.345 0.145
-14.7 to 3000 0.224 0.024 0.249 0.049
Bar 5 VDC Full Scale Outputs 10 VDC Full Scale Outputs
Compound 0.2 to 5.2 0 to 5VDC 0.2 to 10.2 0 to 10VDC
Range Voltage (VDC) Voltage (VDC) Voltage (VDC) Voltage (VDC)
(Factory Set to within ±25mV) (Factory Set to within ±50mV)
-1 to 1.7 2.052 1.851 3.904 3.704
-1 to 3.4 1.336 1.136 2.473 2.273
-1 to 7 0.825 0.625 1.450 1.250
-1 to 17 2.494 0.278 0.756 0.556
- 1 to 35 0.339 0.139 0.478 0.278
-1 to 70 0.270 0.070 0.341 0.141
-1 to 200 0.225 0.025 0.250 0.050
4.1 Voltage Output Zero Adjustment
While monitoring the voltage between the positive output (+OUT) and
common (COM), and with the pressure port open to atmosphere,or with zero
pressure applied, the zero may be adjusted by turning the zero potentiometer
screw.
For the 5 VDC Full Scale Output, the tolerance on zero and span settings is
±25mV. For the 10 VDC Full Scale Output, the tolerance on zero and span
settings is ±25mV. For absolute pressure ranges, the zero should be adjusted
with a full vacuum applied. See Diagram 5 for nominal “installed”output at
atmospheric pressure for compound pressure ranges.
NOMINAL“INSTALLED”OUTPUT AT ATMOSPHERIC PRESSURE
Setra
Transducer
Power Load
+
+
_
+
__
Diagram 5
Diagram 4

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4.2 Voltage Output Span Adjustment
(Complete the zero adjustment before setting span.)
Span or full scale output adjustments should only be performed by using an
accurate pressure standard (electronic manometer, digital pressure gauge,etc.),
with at least comparable accuracy to the GCT225 transducer (±0.25% FS). With full
range pressure applied to the pressure port, the span may be adjusted by turning
the span potentiometer screw. The span (full scale) output is factory set to within
±25mV for 5 VDC FSO output or ±50mV for 0 to 10 VDC FSO output.
4.3 Current Output Zero Adjustment
While monitoring the current output , and with the pressure port open to
atmosphere or with zero pressure applied, the zero may be adjusted by
turning the zero potentiometer screw. The factory setting is 4mA (±0.08mA).
For absolute pressure ranges, the zero should be adjusted with a full vacuum
applied. For compound pressure ranges, the zero should be adjusted with
the unit at atmospheric pressure and the output adjusted as noted in
Diagram 6 below.
Note: When it is not possible to vent input pressure for zero adjustment (ie., hazardous gasses), zero may
be adjusted by pulling a vacuum and setting the unit to 4.0 mA (±0.08 mA). This method may result in a
small zero setting error due to variations in barometric pressure.
4.4 Current Output Span Adjustment
Span or full scale output adjustments should only be performed by using an
accurate pressure standard (electronic manometer, digital pressure gauge, etc.)
with at least comparable accuracy to the GCT225 transducer (±0.25% FS). With full
range pressure applied to the pressure port, the span may be adjusted by turning
the span potentiometer screw. The span (full scale) output is factory set to within
±0.08mA.
5.0 Model 225 PERFORMANCE SPECIFICATIONS
Accuracy RSS*Thermal Effects
(at constant temperature.) ±0.25% FS Comp Range °F(°C)
Non-Linearity, BFSL ±0.15% FS +15 to +150 (-9 to +65)
Hysteresis 0.20% FS Zero Shift
Non-Repeatability 0.02% FS %FS/100°F (50°C) 2.0 (1.8)
*RSS of Non-Linearity, Non-Repeatability and Hysteresis. Span Shift
Environmental Data %FS/100°F (50°C) 2.0 (1.8)
Temperature Warm-up Shift <±0.1% FS total
Operating** °F(°C) -40 to +185 (-40 to 85)
Storage °F(°C) -40 to +185 (-40 to 85)
Current unit ordered with Option N1:
Operating** °F (°C) -22 to +176 (-30 to +80)
Storage °F (°C) -22 to +176 (-30 to +80)
**Operating temperature limits of the electronics only. Pressure media temperatures may be considerably higher or lower.
NOMINAL“INSTALLED”OUTPUT AT ATMOSPHERIC PRESSURE
PSI COMPOUND CURRENT
RANGE OUTPUT (mA)
-14.7 to 25 9.92
-14.7 to 50 7.63
-14.7 to 100 6.05
-14.7 to 250 4.89
-14.7 to 500 4.46
-14.7 to 1000 4.23
-14.7 to 3000 4.08
Diagram 6
BAR COMPOUND CURRENT
RANGE OUTPUT (mA)
-1 to 1.7 9.92
-1 to 3.4 7.63
-1 to 7 6.00
-1 to 17 4.88
-1 to 35 4.44
-1 to 70 4.22
-1 to 200 4.07

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6.0 RETURNING PRODUCTS FOR REPAIR
Please contact Setra (1-800-257-3872, [phone]) before returning unit for
repair to review information to your application. Many times, only minor field
adjustments may be necessary. When returning a product to Setra, the
material should be carefully packaged, accompanied by the “Service/Repair/
Calibration Order Return”form”on page 8 and shipped to:
Setra Systems, Inc.
159 Swanson Road
Boxborough, MA 01719
Attn: Repair Department
Note: Return order form is also available on Setra’s web site @ www.setra.com.
To assure prompt handling, please supply the following information and
include it inside the package of returned material (Return Order Form
provided on page 8):
1. Name and phone number of person to contact.
2. Shipping and billing instructions.
3. Full description of the problem.
4. Identify any hazardous material used with product.
Notes: Please remove any pressure fittings and plumbing that you have
installed and enclose any required mating electrical connectors and wiring
diagrams.
Allow approximately 3 weeks after receipt at Setra for the repair and return of
the unit. Non warranty repairs will not be made without customer approval
and a purchase order to cover repair charges.
CALIBRATION SERVICES
Setra maintains a complete calibration facility that is traceable to the National
Institute of Standards & Technology (NIST). If you would like to recalibrate or
recertify your Setra pressure transducers, please call our Repair Department at
1-800-257-3872 (978-263-1400) for scheduling, cost and turnaround estimates.
7.0 LIMITED WARRANTY AND LIMITATION OF LIABILITY
SETRA warrants its Model GCT225 to be free from defects in materials and workmanship, subject to the following terms and
conditions: Without charge, SETRA will repair or replace products found to be defective in materials or workmanship within
the warranty period; provided that:
a) the product has not been subjected to abuse, neglect, accident, incorrect wiring not our own, improper
installation or servicing, or use in violation of instructions furnished by SETRA;
b) the product has not been repaired or altered by anyone except SETRA or its authorized service agencies;
c) the serial number or date code has not been removed, defaced, or otherwise changed; and
d) examination discloses, in the judgment of SETRA, the defect in materials or workmanship developed under normal
installation, use and service;
e) SETRA is notified in advance of and the product is returned to SETRA transportation prepaid.
Unless otherwise specified in a manual or warranty card, or agreed to in a writing signed by a SETRA officer, SETRA pressure
and acceleration products shall be warranted for one year from date of sale.
The foregoing warranty is in lieu of all warranties, express, implied or statutory, including but not limited to, any implied
warranty of merchantability for a particular purpose.
SETRA’s liability for breach of warranty is limited to repair or replacement, or if the goods cannot be repaired or replaced, to
a refund of the purchase price. SETRA’s liability for all other breaches is limited to a refund of the purchase price. In no
instance shall SETRA be liable for incidental or consequential damages arising from a breach of warranty, or from the use or
installation of its products.
No representative or person is authorized to give any warranty other than as set out above or to assume for SETRA any
other liability in connection with the sale of its products.

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159 Swanson Road, Boxborough, MA 01719-1304/Tel: [phone]/
Fax [phone]/Email: [email protected], Web: www.setra.com
Setra Systems,Inc.
159 Swanson road
Boxborough,MA 01719
Repair Dept.Fax #:[phone]/Phone #:[phone]
✮ All lines must be filled out.
✮ This form must accompany all returns.Returns that arrive with no information will be rejected.
CONTACT NAME: _______________________ EMAIL ADDRESS: __________________________
COMPANY: __________________________ DATE: ________________________________
PHONE NUMBER: _______________________ FAX NUMBER: ___________________________
PURCHASE ORDERWITH“NOTTO EXCEED”AMOUNT CREDIT CARD #,EXP.DATE / CARDHOLDER NAME:
MODEL / PART # AND QTY: SERIAL NUMBER/S:
EXPEDITE ,1-3 days ($50 FEE) RUSH,5-7 days STDTIME,2-3 weeks
CALIBRATION ONLY CERT NEEDED FAILURE ANALYSIS
REASON FOR RETURN/DESCRIPTION OF PROBLEM:
NOTES/COMMENTS OR SPECIAL HANDLING
Any product that has been used with Hazardous Materials must be 100% purged and should be accompanied by a MSDS sheet,
bagged,sealed,and tagged accordingly.Setra will not accept delivery of any product exposed to chemicals,
radioactive agents,or biological process without evidence of decontamination or laboratory analysis,and
proof the biological process is not harmful.
Hazardous chemicals: Yes No (circle one)
List of Chemicals used: _________________________________________________________
Has unit been purged? Yes __ No __ Purged with what? ____________________
Has unit been flushed? Yes __ No __ Flushed with what? ____________________
Has unit been decontaminated? Yes __ No __ Explain Process: ______________________
All wetted surfaces have been removed: Yes __ No __
Billing Address: Shipping Address
Methodof Shipment:
(circle one) PPD: Yes Collect: Yes Please list account #
SERVICE/REPAIR/CALIBRATION ORDER RETURN FORM
SS2031 Rev. C 08/24/2004