Setra System Model 217 - Manual (Page 4)

Diagram 4
4.0 CALIBRATION
The 217 transducer is factory calibrated to the specific input pressure range vs. output voltage or current and
should require no field adjustment. For absolute pressure ranges, the zero can be adjusted with full vacuum
applied to the pressure port. For compound ranges, the zero should be adjusted with the unit at atmospheric
pressure and the output adjusted as noted in Diagrams 5 & 6 on pages 5 & 6. Zero and span adjustments can be
made by removing the zero and span hole plugs and washers and adjusting the zero and span potentiometers. Be
certain to replace the zero and span hole plugs and washers after adjustments are made. Hole plugs and washers
are installed in potentiometer holes to keep contaminants out of the unit.
system’s loop circuit ground for optimum electrical noise rejection.
On transducers with integral connectors (e.g.., on Bayonet, D-sub, or MiniDin Connector types), connection to
transducer case ground can be achieved by connecting the cable drain/shield wire to the mating cable-mounted
connector shell (see Note 1)
Note 1:
The transducer case and integral Bayonet Connector shell, D-sub Connector Shell, and Mini Din shell
clips are electrically connected.
Note 2: UL1604 Approved: The current output unit (excluding units ordered with the Mini Din Shell) may be
installed in UL1604 Class 1 Hazardous (Classified) Group A, B, C, D, Division 2 locations if the unit is
ordered for these locations. (This is denoted by an N1 designation in the Part Number, 12th and 13th
digits.) Safety barriers are not required as long as the unit is operated under normal conditions with a
maximum excitation voltage of 30 VDC between the input terminals.
Note 3: ATEX 94/9/EC Approved: Special hazardous area instructions for 217 transducers (with the N1 suffix)
with ATEX approval: The 217 transducer (with the N1 suffix) is designed for use in hazardous areas
indoor applications with ATEX rating: Non-incendive II 3G Ex NA nL IIC T4 X -30°C<Ta<+80°C. (Note:
Units ordered with the Mini Din Shell are not ATEX approved for use in hazardous locations.)
• The device can only be used for “Indoor Applications”.
• Power must be turned off before connecting or disconnecting.
• For the connector version, the connector must be secured before applying power and DO NOT SEPARATE WHEN
ENERGIZED.
• The shielded cable must be used and the drain wire of the cable must be connected to the earth ground. The
drain wire of the cable must connect to the connector metal outer shell for the connector version.
• The maximum allowable transient disturbance must not exceed more than 40% of the maximum excitation
voltage.
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