AccuSenseTM Model ASL
High Performance Low-Differential Pressure Transducer
Installation Guide
Description
The AccuSense™ Model ASL 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 ASL has been tested and calibrated before shipment. Specic performance
specications are shown on page 3 of this Guide. Setra Systems ASL pressure transducers
sense differential pressure and convert this pressure difference to a proportional high level
analog output. Voltage outputs of 0-5VDC or 0-10VDC, or current output of 4 to 20 mA are
offered.
2.0 Mechanical installation
2.1 Media compatibility
Model ASL transducers are designed for use with gases compatible with 300 series and 17-4
stainless steel on Process port. Clean dry gas is required for connection to Reference port.
2.2 Environment
The operating temperature limits of the ASL 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 ttings
Available pressure ttings are given in table below:
Pressure port
code
1F 1/8” NPT Female / Barb
FF 1/8” NPT Female / 1/8”-27 NPT Female
1M 1/4” NPT Male / Barb
J7 7/16”- 20 SAE Male / Barb
Fitting description:
process port / ref port
1
2.4 Installation of pressure ttings
Your transducer is designed for most accurate operation when subjected to pressures within
the designated pressure range. Refer to the catalog bulletin specications 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 tting may cause
slight zero shift which may be trimmed out using the zero adjustment. Use of a plastic tting
often shows no noticeable zero shift. The torquing effect does not appreciably affect linearity
or sensitivity. The wrench flat on the ASL series must be used when installing the positive
pressure tting.
3.0 Electrical installation
3.1 Electrical connections
ASL is available with cable version or bayonet connector options having different connector
pin outs shown in table below:
3.2 Voltage output units
The Model ASL voltage units are four-wire type circuit with 0-5VDC or 0-10VDC analog output.
3.3 Current output units
The Model ASL 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 source with a voltage
range between 9 and 30 measured between the + and - terminals. The unit is calibrated at the
factory with a 24 VDC loop supply voltage and a 250 ohm load.
9 to 30 VDC
Current
Monitoring
Device
Diagram 1:
2
+
ASL
_
Electrical data:
Signal output ranges 0-5 VDC, 0-10 VDC (4-wire), 4-20mA (2-Wire)
Nominal excitation 24 VDC
Excitation range
9-30V DC (5V DC & 4-20mA output)
15-30V DC (10V DC Output)
Current/Power consumption* <23mA
Circuit response time
<10ms (Voltage Version),
<80ms (4-20mA Version)
Warm-up, environmental Within +/-.02%FS after 15min Warm-up Time
Miswiring Reverse Excitation Protection
*≥70mA of inrush current for approximately 5ms.
Wiring codes:
Code B3
(Standard)
Electrical
Connection
+ 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 calibration module
SecureCal™ Blue E E E E
SecureCal™ Brown F F F F
Wire
Color
Bayonet
Connector
Pinout
Code B4
Option
Bayonet
Connector
Pinout
Code B5
Option
Bayonet
Connector
Pinout
Code B6
Option
Bayonet
Connector
Pinout
4.0. Calibration
The ASL transducer is factory calibrated and should require no eld 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, ne zero and span adjustments
can be made through use of SecureCal™ accessory for calibration access. The Model ASL
transducer zero offset is trimmed in the vertical position (pressure ports pointing downward)
prior to shipping from factory.
4.1 Zero/Span adjustments with SecureCal™
To make secure zero and span adjustments, attach SecureCal™ accessory to ASL pressure
transducer. (See Diagram 2).
4.2 Zero adjustment (Current Output)
While applying zero pressure, zero may be adjusted by pressing the send button to tare
zero. If ne adjustment is needed on analog output, turn the encoder wheel until desired
compensation is seen on display (if 0.0025 VDC is measured, where 0 VDC is desired, turn
wheel until -2.5mV is attained) then press send button.
3
4.3 Span adjustment (current output)
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 ASL 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 ne
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.
2 Line Alpha Display
Single Button for Snap
Span (Digital Trim) or
LED Feedback
Reset (Power) Switch
Sending Analog Correction
Rotary Adjustment Encoder
Wheel for Analog Zero or
Span Correction
Pressure ranges Burst pressure
0 to 2.5 in. WC, 5 mBar 200 psi, 15 Bar ±10 psi, ±700 mBar ±75 psi, ±5 Bar
0 to 5 in. WC, 10 mBar 300 psi, 20 Bar ±20 psi, ±1 Bar ±100 psi, ±7 Bar
0 to 10 in WC, 25 mBar 300 psi, 20 Bar ±30 psi, ±2 Bar ±150 psi, ±10 Bar
0 to 30 in. WC, 1 psi, 100 mbar 300 psi, 20 Bar ±50 psi, ±4 Bar ±150 psi, ±10 Bar
Standard proof pressure
Option Code “00”
High proof pressure
Option Code “01”
* Burst Pressure: The maximum pressure that may be applied to the positive pressure port without rupturing the diaphragm or reference pressure containment.
** Proof Pressure: The maximum recoverable pressure that may be applied without changing performance beyond specication: ±0.5% Zero Shift, Typical
In the event that the unit is overpressured in the negative direction (reference port), apply equal
pressure in the positive direction (process port) for optimum recovery of performance.
4
Accuracy data:
Accuracy code A B C
Accuracy < ±0.07% FS RSS* < ±0.15% Reading** ≤ ±0.1% FS RSS*
Non-Linearity, End-point < ±0.03% FS Typ. ≤ ± 0.08% FS Typ.
Hysteresis < 0.03% FS Typ. ≤ ±0.06% FS Typ.
Non-repeatability < ±0.02% FS Typ. ≤ ±0.04% FS Typ.
Span setting tol. < ±0.1% FS < ± 0.15% FS
Zero offset tol. < ±0.1% FS < ±0.1% FS < ±0.20% 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 ±0.03% FS.
Zero offset position effect
Unit factory calibrated in vertical position (pressure port downward)
Long-term stability < 0.15% FS/year typical
Response time <10ms for voltage output
(From 100% to 10% of pressure range) <80ms for current input
< ±0.25% FS Typ.
< ±0.5% FS Max.
(-20°C to 60°C)
< ±0.25% FS Typ.
< ±0.5% FS Max.
(-20°C to 60°C)
< ±0.5% Typ.
< ±1% Max.
<0.1%g
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
Clean dry gases compatible with 304, 316 series and 17-4 pH stainless steel.
Physical description
Weight 13 oz. (360 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
Current consumption* <23 mA
Warm-up, environmental Within +/-0.02%FS after 15 min. Warm-up Time
Miswiring Reverse excitation protection
9-30 VDC (5V DC & 4-20mA output)
15-30 VDC ( 10V DC Output)
Congurations
Electrical terminations 6-conductor cable, pigtail; 6-pin bayonet connector
Regulatory compliance
RoHS, CE
*≥70mA of inrush current for approximately 5ms.
5
Drawings:
inches (mm)
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 eld
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 ttings 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.
6.1 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 re-certify your Setra
pressure transducers, please call our Repair Department at 800-257-3872 (978-263-1400)
for scheduling.
6
7.0 Ordering information:
Example part number: ASL1001WB1F2B03A00;
ASL Transducer, ±1” W.C. Pressure Range, 1/8” NPT Female Reference Port, 0 to 5 VDC
Output, 3 Foot Cable, <±0.07% FS RSS Accuracy, No Options:
Part number congurator:
[1] [2] [3] [4] [5] [6] [7]
[1] [2] [3]
Model
ASL1 Model ASL
[4] [5] [6] [7]
Output
2B 0 to 5 VDC
2C 0 to 10 VDC
11 4 to 20 mA
Pressure range
(unidirectional)
R25WD20 to 0.25” WC
0R5WD 0 to 0.5” WC
001WD 0 to 1” WC
002WD 0 to 2” WC
2R5WD 0 to 2.5” WC
005WD 0 to 5” WC
010WD 0 to 10” WC
030WD 0 to 30” WC
040WD 0 to 40” WC
005MD 0 to 5 mBar
010MD 0 to 10 mBar
025MD 0 to 25 mBar
050MD 0 to 50 mBar
100MD 0 to 100 mBar
001PD 0 to 1 PSID
002PD 0 to 2 PSID
050LD20 to 50 Pa
100LD 0 to 100 Pa
250LD 0 to 250 Pa
Elec. termination
03 3 ft./1 m std. cable
B3 Std. 6-pin ext. bayonet connect, std. wiring
or
1
[2]
Pressure range
(bidirectional)
0R1WB2±0.1” WC
R25WB ±0.25” WC
0R5WB ±0.5” WC
001WB ±1” WC
002WB ±2” WC
005WB ±5” WC
015WB ±15” WC
005MB ±5 mBar
010MB ±10 mBar
025MB ±25 mBar
050MB ±50 mBar
001PB ±1 PSID
002PB ±2 PSID
025LB2±30 Pa
050LB ±60 Pa
125LB ±125 Pa
A <±0.07% FS RSS
C <±0.1% FS RSS
1
1F 1/8” NPT Int./ Barb
FF 1/8 NPT Int./ 1/8 NPT Int.
1M 1/8” NPT Ext./ Barb
J7 7/16-20 SAE Ext./Barb
Accuracy
Process/reference port
Option
00 None, standard
01 High overpressure
1
Other ranges and engineering units are available (e.g. Pa, kPa).
2
Range only available with accuracy code “C”.
7
8.0 Warranty and limitation of liability
SETRA warrants its products 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 notied in advance of and the product is returned to SETRA transportation
prepaid.
Unless otherwise specied in a manual or warranty card, or agreed to in writing and signed by
a SETRA ofcer, 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.
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).
Setra Systems, Inc.
159 Swanson Road, Boxborough, MA 01719
800.257.3872 • www.setra.com
SS-ASL Rev. E 5/2020
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