User guide

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