Setra System Model 265 - Manual (Page 3)

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location of zero adjustment.) For 0-5 VDC output units, the factory settings
are 0.0VDC (±50mV) for unidirectional pressure ranges and 2.5VDC (±50mV)
for bidirectional pressure ranges. Optional outputs are set at the same ±1%
factory setting.
4.2 Voltage Output Span Adjustment (Complete the zero adjustment
before setting span.)
Span or full scale output adjustments should only be performed by using an
accurate pressure standard (electronic manometer, digital pressure gage, etc.),
with at least comparable accuracy to the 265 transducer (<±1% FS). With full
range pressure applied to the high pressure port (reference port open to atmo-
sphere), the span may be adjusted by turning the SPAN adjustment screw. (See
Diagram 1 for location of the SPAN adjustment.) For 0-5 VDC output units, the
factory settings are 5.0 VDC (±50mV) for unidirectional and bidirectional ranges.
Optional outputs are set at the same ±1% factory setting.
4.3 Current Output Zero Adjustment
While monitoring the current output between +EXC and OUT, and with both
pressure ports open to atmosphere, the zero may be adjusted by turning the
zero adjustment screw. (See Diagram 1 for location of zero adjustment.) The
factory settings are 4mA (0.16mA) for unidirectional pressure ranges and 12mA
(0.16mA) for bidirectional ranges.
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 gage,
etc.) with at least comparable accuracy to the 265 transducer (<±1% FS). With
full range pressure applied to the high pressure port (reference port open to
atmosphere), the span may be adjusted by turning the SPAN adjustment screw.
(See Diagram 1 for location of SPAN adjustment.) The factory settings are 20mA
(0.16mA) for unidirectional and bidirectional pressure ranges.
5.0 MODEL 265 PERFORMANCE SPECIFICATIONS
Accuracy RSS * ±1.0% FS Thermal Effects
(at constant temperature.) Compensated Range °F(°C) 0 to +150 (-18 to +65)
Non-Linearity, BFSL ±0.98% FS Zero/Span Shift %FS/°F(°C) 0.033 (0.06)
Hysteresis 0.1% FS Maximum Line Pressure 10 psi
Non-Repeatability 0.05% FS Overpressure 10 psi in positive or
*RSS of Non-Linearity, Non-Repeatability negative direction
and Hysteresis. Warm-up Shift ±0.1% FS total
Position Effects
(Unit is factory calibrated at 0g effect in the vertical position)
Range Zero Offset (%FS/G)
0 to 1” WC .22
0 to 5” WC .14
0 to 30” WC .06