www.astsensors.com (973) 448-1901 www.astsensors.com (973) 448-1901
AST46DS Explosion-Proof Pressure
Transducer / Transmitter with Display
For Use with Liquids and Gases
Operating Instructions
1/2” NPTF1/2” NPTF
6.535
4.134
1.556
3.543
4.173
1.575
ZERO ADJUSTMENT:
The Zero button will adjust the output signal and display to the •
base reading range.
Ensure the product is in a non-hazardous environment.•
Remove the front display cover by hand to access the “Zero” •
button.
Connect the AST46DS using standard wiring instructions with an •
8-28VDC power supply.
Do not remove power from the product during the Zero •
adjustment process. If “Checkbyte Error” displays, contact factory
Make sure that the process connection is not pressurized and •
is open to atmosphere to reset to 0 PSIG. If the zero pressure
is adjusted with pressure, it can be calibrated up to 5% of the full
span (i.e. 5 PSI for a 100 PSI transmitter). “Zero adjustments
above or below 5% will result in an “OUT OF RANGE” condtion
displayed on the LCD.
Press the “Zero” button until the display reads “• ZERO”. The
AST46DS will then read 0.0 for pressure units if the calibration was
started in units, 1.000 for a 1-5V output, or 4.00 for a 4-20mA output.
(compound and bi-directional transmitters will “zero” to the factory
calibrated zero offset).
Re-install the front display cover.•
UNITS
Ensure the product is in a non-hazardous environment.•
Remove the front display cover to access the “Units” button.•
Connect the AST46DS using standard wiring instructions with an •
8-28VDC power supply.
Press the Units” button to cycle between the display options until •
you reach the desired units.
Re-install the front display cover.•
OVER PRESSURE DISPLAY
At 5% over-pressure, the display will begin to blink at 1/2Hz.
REMOVING POWER
If you power off AST46DS, it will default back to the last setting for the display and zero calibration.
© 2013 American Sensor Technologies Inc.
AST46DS Operating Instructions, 10/10/13
1/2” NPTF1/2” NPTF
6.535
4.134
1.556
3.543
4.173
1.575
Class I, Div. 1, Groups A, B, C, D T5•
Class II, Div. 1, Groups E, F, G; Class III*•
Ambient Temp: -40 to 85°C ( -40 to 185°F )•
Process Temperature: -40 to 125°C (-40 to 257°F)•
Conduit seal is required within 18 inches for Group A installations. •
Seal not required for Group B, C & D Installations. •
Single Seal•
CSA 2013 2561438•
*Gauge and vacuum reference units not suitable for Class II. Refer to datasheet.•
American Sensor Technologies
450 Clark Drive
Mount Olive, NJ 07823 USA
Phone: (973) 448-1901
Fax: (973) 448-1905
(4 pages)
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