4.1 Voltage Output Zero Adjustment
While monitoring the voltage between the positive output (OUT) and common (COM), 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 the zero adjustment). For 0-5 VDC output units, the factory settings are 0.050 VDC
(±50 mV) for unidirectional pressure ranges and 2.5 VDC (±50 mV) for bi-directional pressure ranges.
Optional outputs are set at the same ±1% factory setting tolerance.
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 gauge, etc.) with at least comparable accuracy to the DPT264
transducer (±1% full scale). 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 the SPAN adjustment.) For 0-5 VDC output units, the factory settings at full range pressure are
5.050 VDC (±50 mV) for unidirectional and bi-directional ranges.
4.3 Current Output Zero Adjustment
While monitoring the current output between the + and – terminals, and with both pressure ports open to
atmosphere, the zero may be adjusted by turning the zero adjustment screw. (See Diagram 3 for location of
zero adjustment.) The factory settings are 4 mA (0.16mA) for unidirectional pressure ranges and 12 mA
(0.16 mA) for bi-directional ranges.
4.4 Current Output Span Adjustment
Span of 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 DPT264
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 3 for location
of SPAN adjustment.) The factory settings are 20 mA (0.16 mA) for unidirectional and bi-directional
pressure ranges.
5.0 MODEL DPT264 PERFORMANCE SPECIFICATIONS
Accuracy*
±1.0% FS
Thermal Effects
(at Constant temperature)
Compensated Range °F (°C)
0 to +150 (-18 to +65)
Non-Linearity, BFSL
±0.96% FS
Zero/Span Shift %FS/°F(°C)
0.033 (0.06)
Hysteresis
0.2% FS
Maximum Line Pressure
10 psi
Non-Repeatability
0.1% FS
Overpressure
10 psi in positive or
negative direction
*RSS of Non-Linearity, Non-Repeatability and Hysteresis
Position Effects
(Unit is factory calibrated at 0g effect in the vertical Position)
Range
Zero Offset (%FS/G)
0 to 0.1 in. WC
2.1
0 to 1.0 in. WC
0.22
0 to 5 in. WC
0.14
0 to 10 in. WC
0.1`2
