Model AXD
Operating Instructions
1.0 Introduction
Every sensor in the AXD product family has been tested and calibrated before shipment. Setra Systems
AXD product family senses gauge, compound, vacuum gauge and converts this pressure difference
to a proportional high level analog output. Three standard excitation and output versions are offered:
Excitation
Output
Output codes
9 to 28 VDC
4-20 mA reverse excitation protection
11
9 to 30 VDC
e.g. 0.5 to 5.5 VDC - (Reverse excitation protection)
24, 2E, et.al
4.9 to 8.1 VDC
Reverse excitation protection 0.5 to 4.5 VDC
45
2.0 Mechanical installation
2.1 Media compatibility
The transducers in the AXD product family are offered with two different types of wetted materials.
The AXD1 is made with 17-4PH stainless steel and the AXDH is made with 316 stainless steel. Prior
to use in your application confirm that your media is compatible with the wetted materials of the
ordered sensor.
2.2 Environment
The operating temperature limits of the AXD are -40° to +257°F (-40 to +125°C) on most electrical
connection options (except where noted). The compensated temperature range is -4 to +185°F
(-20 to +85°C).
2.3 Pressure fittings
Typically, standard pipe fittings and procedures should be used. However, for pressure ranges in
excess of 500 psig, we suggest the use of a sealant such as Locite Hydraulic Sealant. Excessive
torquing of metal fittings may cause a slight zero shift. The use of plastic fittings typically results in
no noticeable zero shift. Torquing does not appreciably affect linearity or sensitivity.
2.4 Venting
Because the reference pressure in a sealed gauge transducer will vary due to changes in temperature
and will affect overall accuracy (especially in units of less than 200 psig range), all transducers in the
AXD product family are available in both vented or sealed pressure types.
Vented units are ordered as gauge pressure type (e.g. PSIG) units. Sealed units are ordered as
sealed gauge type (e.g. PSIS) range units. The AXD gauge transducers are vented through electrical
termination as shown in table below.
Electrical termination
Venting
Cable (XX)
Venting through cable
3-pin packard (P1)
Venting through porous filter protected by loose o-ring
M12, 4-pin (M4)
Venting through connector
Terminal strip/conduit ("A1")
Venting through porous filter on terminal strip
3.0 Electrical installation
The AXD product family is available with four electrical terminations:
• (2ft/0.5m, 6ft./2m, 12ft/4m, 25ft/8m) cable
• M12-4 PIN connector
• 3-pin packard connector
• Terminal connection w/ conduit adapter, 1/2 inch
