Setra System Model 217 - Manual (Page 6)

4.3 Current Output Zero Adjustment
While monitoring the current output, and with the pressure port open to atmosphere or with zero pressure applied,
the zero may be adjusted by turning the zero potentiometer screw. The factory setting is 4mA (±0.08mA). For
absolute pressure ranges, the zero should be adjusted with a full vacuum applied. For compound pressure ranges, the
zero should be adjusted with
the unit at atmospheric pressure and the output adjusted as noted in
Diagram 6 below.
Note: When it is not possible to vent input pressure for zero adjustment (ie., hazardous gases), zero may be adjusted by pulling
a vacuum and setting the unit to 4.0 mA (±0.08 mA). This method may result in a small zero setting error due to variations in
barometric pressure.
4.4 Current Output Span Adjustment
Span or full scale output adjustments should only be performed by using an accurate pressure standard (electronic
manometer, digital pressure gauge, etc.) with at least comparable accuracy to the 217 transducer (±0.25% FS). With
full range pressure applied to the pressure port, the span may be adjusted by turning the span potentiometer screw.
The span (full scale) output is factory set to within ±0.08mA.
5.0 MODEL 217 PERFORMANCE SPECIFICATIONS
Accuracy RSS * (at constant temperature.) ±0.25% FS
Non-Linearity, BFSL ±0.15% FS
Hysteresis 0.20% FS
Non-Repeatability 0.02% FS
*RSS of Non-Linearity, Non-Repeatability and Hysteresis.
Thermal Effects
Compensated Range °F(°C) +15 to +150 (-9 to +65)
Zero Shift %FS/100°F (50°C) ±2.0 (±1.8)
Span Shift %FS/100°F (50°C) ±2.0 (±1.8)
Environmental
Temperature
Operating** °F(°C)
-40 to +185 (-40 to 85)
Storage °F(°C) -40 to +185 (-40 to 85)
Current unit ordered with Option N1:
Operating** °F (°C) -22 to +176 (-30 to +80)
Storage °F (°C) -22 to +176 (-30 to +80)
**Operating temperature limits of the electronics only. Pressure media temperatures may be considerably higher or lower.
Diagram 5
NOMINAL “INSTALLED” OUTPUT AT ATMOSPHERIC PRESSURE
PSI COMPOUND CURRENT
RANGE OUTPUT (mA)
-14.7 to 25 9.92
-14.7 to 50 7.63
-14.7 to 100 6.05
-14.7 to 250 4.89
-14.7 to 500 4.46
-14.7 to 1000 4.23
-14.7 to 3000 4.08
BAR COMPOUND CURRENT
RANGE OUTPUT (mA)
-1 to 1.7 9.92
-1 to 3.4 7.63
-1 to 7 6.00
-1 to 17 4.88
-1 to 35 4.44
-1 to 70 4.22
-1 to 200 4.07
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