AccuSenseTM Model ASM
High Performance Pressure Transducer
Installation Guide
DESCRIPTION
The AccuSenseTM Model ASM pressure transducer is a high performance pressure transducer designed for accurate, reliable pressure measurements. It has a
high level analog output signal, excellent stability, and secure calibration which
makes it ideal for high performance industrial, laboratory, and engine test cell
applications.
1.0 GENERAL INFORMATION
Every Model ASM has been tested and calibrated before shipment. Specific
performance specifications are shown on page 3 of this Guide. Setra Systems
ASM pressure transducers sense gauge, absolute, or vacuum gauge pressure and
convert this pressure difference to a proportional high level analog output. Voltage outputs of 0 to 5VDC or 0 to 10VDC, and current output of 4 to 20 mA are
offered.
2.0 MECHANICAL INSTALLATION
2.1 Media Compatibility
Model ASM transducers are designed for use with gases and liquids compatible
with 17-4PH stainless steel.
2.2 Environment
The operating temperature limits of the ASM are -40°C to +85°C (-40°F to
+185°F)
The compensated temperature range is -20°C to +60°C (-4°F to +140°F)
2.3 Pressure Fittings
Available pressure fittings are given in table below:
Pressure Fitting Code Fitting Description
1F 1/8”-27 NPT Female
1M 1/8”-27 NPT Male
2F 1/4”-18 NPT Female
2M 1/4”-18 NPT Male
J7 7/16”- 20 SAE Male
1
2.4 Installation of Pressure Fittings
Your transducer is designed for the most accurate operation when subjected to
pressures within the designated pressure range. Refer to page 4 for proof pressure limits.
Standard sealants such as Teflon pipe tape generally are satisfactory on NPT
threads. For the most sensitive pressure ranges, excessive high torquing of a
metal pressure fitting may cause slight zero shift which may be trimmed out
using the zero adjustment. Use of a plastic fitting often shows no noticeable zero
shift. The torquing effect does not appreciably affect linearity or sensitivity. The
3/4 in. wrench flat (Hex) on the unit must be used when installing the positive
pressure fitting.
3.0 ELECTRICAL INSTALLATION
3.1 Electrical Connections
ASM is available with a cable, or bayonet connector options having different
connector pin-outs shown in table below:
Wiring Codes Code B3
(Standard)
Electrical Connection
Cable Wire Color Bayonet
Connector
Pinout
Code B4
Option
Bayonet
Connector
Pinout
Code B5
Option
Bayonet
Connector
Pinout
Code B6
Option
Bayonet
Connector
Pinout
+EXC Red A A A C
-EXC Black D B B D
+Sig Out Green B C D A
-Sig Out White C D C B
Reserved for communication with SecureCalTM calibrtion module.
TM
SecureCal
SecureCal
TM
Blue E E E E
Brown F F F F
CAUTION: Connecting -EXC to positive excitation and +Sig to negative excitation at the same time may damage the unit.
3.2 Voltage Output Units
The Model ASM voltage units are four-wire type circuit with 0-5VDC or 010VDC analog output.
3.3 Current Output Units
The Model ASM current units are a two-wire loop-powered 4 to 20mA current
output and delivers rated current into any external load of 0 to 800 ohms.
The current flows into the + terminal and returns back to the power supply
through the - terminal (See Diagram 1). The power supply must be a DC voltage
2
source with a voltage range between 9 and 30 VDC measured between the +
and - terminals. The unit is calibrated at the factory with a 24 VDC loop supply
voltage.
3.4 Cable for Bayonet Connectors
For good EMC performance, shielded cable shall be used and grounded to earth
ground. Cable shall only be used within a building and not be longer than 30 m
(100 ft.).
+
ASM
9 to 30 VDC
_
Diagram 1
Current
Monitoring
Device
Electrical Data
Signal Output Ranges 0-5 VDC, 0-10 VDC (4-wire); 4-20mA (2-Wire)
Nominal Excitation 24 VDC
Excitation Range 9-30 VDC (5 VDC & 4-20mA output)
15-30 VDC (10 VDC Output)
Current Consumption <23mA
Circuit Response Time <10ms (Voltage Version),
<80ms (4-20mA Version)
Warm-up, Environmental Within +/-0.02%FS after 15 min. Warm-up Time
Miswiring Reverse Excitation Protection
4.0. CALIBRATION
The ASM transducer is factory calibrated and should require no field adjustment if mounted in a vertical position. Whenever possible, any zero and/or span
offsets should be corrected by software adjustment in the user’s control system.
However, fine zero and span adjustments can be made through use of Secure-
TM
Cal
accessory (purchased separately) for calibration access. The Model ASM
transducer zero offset is trimmed in the vertical position (pressure port pointing
downward) prior to shipping from factory.
4.1 Zero/Span Adjustments with Secure-Cal
TM
To make secure zero and span adjustments, attach SecureCalTM accessory to
ASM pressure transducer. (See Diagram 2).
4.2 Zero Adjustment
While applying zero pressure, zero offset may be adjusted by pressing the
send button to tare zero. If fine adjustment is needed on analog output, turn the
3
encoder wheel until desired compensation is seen on display.
Example for Voltage Output: If 0.0025 VDC is measured, where 0 VDC is
desired, turn wheel until -2.5mV is attained, then press send button.
Example for Current Output: If 3.990 mA is read on current meter, turn
wheel until +0.01 mA is attained, then press send button.
Zero adjustment should be done prior to span. To get better results, always wait
until unit has warmed-up before making any adjustment.
4.3 Span Adjustment
Span or full scale output adjustments should only be performed by using an
accurate pressure standard (electronic calibrator, dead weight tester, digital pressure gauge, etc.) with greater or at least comparable accuracy to the ASM transducer. With full range pressure applied to the high pressure port, the span may
be adjusted by pressing the send button to set span. If fine adjustment is needed
on span, and control pressure is applied at full pressure range, turn encoder until
target correction is achieved on LCD then press send button.
Diagram 2
2 Line Alpha Display
LED Feedback
Single Button for Snap Span
(Digital Trim) or Sending
Analog Correction
Reset (Power) Switch
Rotary Adjustment Encoder
Wheel for Analog Zero or
Span Correction
4
Pressure Ranges/Proof Pressure Specifications
Pressure
Ranges
Full Scale Range
(PSI)
15
25
50
100
150
200
300
500
750
1000
* Burst Pressure: the maximum pressure that may be applied to the positive pressure port without rupturing the sensing element.
** Proof Pressure: The maximum recoverable pressure that may be applied without changing performance beyond specification: ±0.5% Zero Shift, Typical
Burst
Pressure*
(PSI)
3000
3000
8000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
Standard
Code “00”
Proof
Pressure**
(PSI)
30 (2x)
50 (2x)
100 (2x)
200 (2x)
300 (2x)
400 (2x)
600 (2x)
800 (1.5x)
1200 (1.5x)
1500 (1.5x)
High Over
pressure-
Option
Code “01”
High Proof
Pressure
(PSI)
150 (10x)
250 (10x)
500 (10x)
1000 (10x)
1200 (8x)
1200 (6x)
1500 (5x)
2000 (4x)
2250 (3x)
3000 (3x)
5
Performance Data
Accuracy Code
A B C D
Accuracy <±0.05% FS
RSS*
Non-Linearity <±0.025% FS
End Point Typ.
Hysteresis <0.03% FS
Typ.
Non-Repeatability <±0.02% FS
Typ.
Span Setting Tol. <±0.05% FS <±0.1% FS
Zero Offset Tol. <±0.05% Typ. <±0.1% FS
Thermal
Total Error Band
*RSS: Root Sum Square of endpoint linearity, Hysteresis and Non-repeatability at constant temperature.
** % of Reading accuracy achieved down to 20% of pressure range when zero offset is removed. Below 20% of
pressure range uncertainty is ±0.02% FS.
Zero Offset Position Effect
<0.05%/g (Ranges ≥ 100 psi)
<0.1%/G (Ranges ≤ 50 psi)
Unit factory calibrated in vertical position (Pressure Port downward)
Long-Term Stability: 0.1% FS/Year
Response Time to Pressure Input <10 ms for Voltage Output
(From 100% to 10% of Pressure Range) <80 ms for Current Output
Environmental Data
Temperature Calibrated °F (°C) -4 to 140 (-20 to 60)
Operating °F (°C) -40 to +185 (-40 to +85)
Storage °F (°C) -40 to +185 (-40 to +85)
Pressure Media
Gases or liquids compatible with 17-4 PH stainless steel. Note: Hydrogen not recommended for use with 17-4 PH
stainless steel.
Physical Description
Weight 9 oz. (254 g)
Case Materials Stainless Steel
Moisture / Splash Resistance NEMA 4X IP65
Electrical Data
Signal Output Ranges 0-5 VDC, 0-10 VDC (4-wire), 4-20mA (2-Wire)
Nominal Excitation 24 VDC
Excitation Range 9-30 VDC (5V DC & 4-20mA output)
15-30 VDC ( 10V DC Output)
Current Consumption <23 mA
Warm-up, Environmental Within +/-0.02%FS after 15 min. Warm-up Time
Miswiring Reverse Excitation Protection
Configurations
Electrical Terminations 6-Conductor Cable, Pigtail
6-Pin Bayonet Connector
Regulatory Data RoHS Compliant
CE Compliance Standards
Reading**
<±0.25% FS
(-20°C to 60°C)
<±0.1%
6
<±0.1% FS RSS*
<±0.05% FS
End Point Typ.
<0.03% FS Typ.
<±0.02% FS Typ.
<±0.50% FS
(-20°C to 60°C)
<±1.5% FS Typ.
(-20°C to 60°C)
Model ASM
Code all blocks in table.
ORDERING INFORMATION
A S M 1
Model Pressure Ranges Type Pressure Port Output Elec. Termination Accuracy Option
ASM1 = ASM PSI BAR G = Gauge IF = 1/8" NPT Female 2B = 0 to 5 VDC 03 = 3 ft., 1m Std Cable A = <±0.05% FS RSS 00 = None, Standard
Z01P = 0 to -14.7 PSI Z01B = -1 BAR C = Compound 1M = 1/8" NPT Male 2C = 0 to 10 VDC B3 = Std 6-PIN Male <0.25% TEB 01= High Overpressure
015P = 0 to 15 PSI 002B = 2 BAR Gauge 2F = 1/4” NPT Female 11 = 4 to 20 mA Bayonet Connector, B = <±0.1 % Reading (See Table)
Example: Part No. ASM1050PG2M1103A00 for an ASM Transducer 0 to 50 PSIG Range, 1/4" NPT Male Pressure Fitting, 4 to 20 mA Output, 3 Feet of Cable, and <±0.05% FS RSS <0.25% TEB., with no option
025P = 0 to 25 PSI 005B = 5 BAR A = Absolute 2M = 1/4” NPT Male Standard Wiring <0.25% TEB
7
050P = 0 to 50 PSI 010B =10 BAR V = Vacuum J7 = 7/16”-20 SAE Male B4 , B5, B6 = 6 Pin Male Bayonet C = <±0.1 FS RSS
100P = 0 to 100 PSI 020B = 20 BAR Gauge Connector, Optional Wiring (see table) <0.5% TEB
150P = 0 to 150PSI 040B = 40 BAR (Z01 Range D = <± 0.1% FS RSS
200P = 0 to 250 PSI 050B = 50 BAR Code Only) <1.5% TEB
Brochure or Setra.com website for latest available configurations
TM
While we provide application assistance on all Setra products both personally and through our litera-
ture, it is the customer’s responsibility to determine the suitability of the product in the application.
Note: Please reference AccuSense
300P = 0 to 300 PSI 070B = 70 BAR
500P = 0 to 500 PSI
750P = 0 to 750 PSI
10CP = 0 to 1000 PSI
6.0 RETURNING PRODUCTS FOR REPAIR
Please contact a Setra application engineer (800-257-3872, 978-263-1400) before
returning unit for repair to review information relative to your application. Many times
only minor field adjustments may be necessary. When returning a product to Setra,
the material should be carefully packaged and accompanied by Setra’s Calibration
and Service Order Form found at www.setra.com/tra/repairs/pdf/webrepair.pdf., and
shipped prepaid to:
Setra Systems, Inc.
159 Swanson Road
Boxborough, MA 01719-1304
Attn: Repair Department
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 800-257-3872 (978-
263-1400) for scheduling.
7.0 WARRANTY AND LIMITATION OF LIABILITY
SE
With
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 instal-
lation, 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 writing and signed by a SETRA officer, SETRA pressure and
acceleration products shall be warranted for one year from date of sale.
The forego
merchantability for a particular purpose.
SETRA’s li
of the purc
be li
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.
SS-ASM-Rev A 07/23/10
For all CE technical questions, contact Setra Systems, USA. EU customers may contact our EU representative Hengstler GmbH,
Uhlandstr 49, 78554 Aldingen, Germany (Tel: +49-7424-890; Fax: +49-7424-89500).
159 Swasnon Road, Boxborough, MA 01719/Tel.: 800-257-3872/978-263-1400/
Fax: 978-264-0292/Email: sales@setra.com/Web: www.setra.com
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