AST AST46DS Operating Instructions User Manual
Operating instructions
TM
www.astsensors.com (973) 448-1901
www.astsensors.com (973) 448-1901
TM
AST46DS Explosion-Proof Pressure
Transducer / Transmitter with Display
For Use with Liquids and Gases
Operating Instructions
1/2” NPTF
1/2” 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” NPTF
1/2” 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