Setra System 267MR - Manual (Page 10)

with at least comparable accuracy to the 267 or 267MR 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.) Factory settings are:
Unidirectional Pressure Ranges Bidirectional Pressure Ranges
Span Adjustment Output Span Adjustment Output
5.0 VDC (±25 mV) 0-5 VDC 2.5 VDC (±25 mV) 0-5 VDC
10 VDC (±50 mV) 0-10 VDC 5 VDC (±50 mV) 0-10 VDC
Example 1: Unidirectional pressure range of 0 to 1” W.C. with 0 to 5 VDC out-
put
Apply 1.00” W.C., adjust span to 5 VDC (±25 mv)
Example 2: Bidirectional pressure range of ±5” W.C. with 0 to 5VDC output
Apply 5.00” W.C., adjust span to 5 VDC (±25 mV)
4.3 Current Output Zero Adjustment
While monitoring the current output , 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) Factory settings are:
Unidirectional Pressure Ranges Bidirectional Pressure Ranges
Zero Adjustment Output Zero Adjustment Output
4mA (0.08 mA) 4-20 mA 12 mA (0.08 mA) 4-20 mA
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 267 or 267MR 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.) Factory settings are:
Unidirectional Pressure Ranges Bidirectional Pressure Ranges
Span Adjustment Output Span Adjustment Output
20mA (0.08 mA) 4-20 mA 20 mA (0.08 mA) 4-20 mA
Example 1: Unidirectional pressure range of 0 to 1” W.C. with 4 to 20 mA output
Apply 1.00” W.C., adjust span to 20 mA (±0.08mA)
Example 2: Bidirectional pressure range of 5” W.C. with 4 to 20 mA output
Apply 5.00” W.C., adjust span to 20 mA (±0.08 mA)
5.0 MODEL 267 OPTIONAL LCD DISPLAy
The Model 267 is available with an optional 3 1/2 digit LCD display. The LCD
display is adjusted at the factory prior to shipment. The LCD is connected to
the zero and span adjustment potentiometers. Therefore, adjustment of the
zero and span according to Section 4 adjusts the LCD display.
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