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6.0 MULTI-RANGE OPERATION - MODEL 267MR ONLY
The 267MR is re-rangeable by accessing the switches located internal to the
transducer housing. To access the "Dip" switches, remove the screws on the
top of the case and lift off the cover. The "Dip" switches are located on the
electronics board as shown in Diagrams 1 and 5. The voltage output version
has 5 switches. The current version has 4. The location of these switches, "on"
(up position) or "off" (down position), determine what range has been
selected. See Table 1 or 2 below for switch positions for in.WC or Pascals.
Multi-Range units are factory set to the highest range. As an example, an MR2
range is factory set to 0 to 1" W.C.
If it is a 0-5 VDC
ON
output, the
switches are set:
1 2 3 4 5
If the 267MR Range is re-configured from the factory calibration, place the
correct range label (enclosed) on the cover label, over the area indicating the
factory default range.
Notes: Voltage output is set based upon ordering code.
See switch settings below to confirm voltage output.
The 4-20 mA current version has only 4 switches.
TABLE-1
RANGE SWITCHING INSTRUCTIONS FOR IN.WC
MR1
MR2
MR3
MR4
RANGE
RANGE
RANGE
RANGE
Factory Default Setting
0–0.1"
0–1"
0–5"
0–30"
0–.5"
0–2.5"
0-15"
0–.25"
0–1.25"
0–7.5"
±
±
±
±
0.05"
.5"
2.5"
15"
±
±
±
.25
1.25"
7.5"
±
±
±
.125"
.625"
3.75"
8
To change the range to 0 to
ON
.25" W.C. with a 0-10 VDC
output, change the switches to:
SWITCH
SWITCH
SWITCH
SETTINGS
SETTINGS
SETTINGS
0-5V
0-10V
4-20MA
OUTPUT
OUTPUT
OUTPUT
Setra Systems
Model 267 and Model 267MR
1.0 GENERAL INFORMATION
Every Model 267 and Model 267MR (Multi-Range) has been tested and cali-
brated before shipment. Specific performance specifications are listed on Page
9 of this Guide.
The Model 267 is single range only. The Model 267MR has field selectable
range capability. The 267MR is factory calibrated for the highest pressure
range. The range label on the cover of the unit indicates the factory-calibrat-
ed range. Should the 267MR be re-ranged in the field, other Multi-Range labels
are included.
Setra Systems 267 and 267MR pressure transducers sense differential or gauge
(static) pressure and convert this pressure difference to a proportional high
level analog output for both unidirectional and bidirectional pressure ranges.
Two output versions are offered: A configurable voltage output of 0 to 5 VDC
or 0 to 10 VDC, and a current output of 4 to 20 mA.
Sections 1 through 4 and 7 through 9 of this Guide apply to both Models 267
and 267MR. Section 5 refers to the Model 267 only. Section 6 refers to the
Model 267MR only.
1
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