Installation Instructions

Document No. 129-370
Installation Instructions
November 23, 2009
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. Products or company names mentioned herein may be the trademarks of their respective
owners. © 2009 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
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Document No. 129-370
Printed in the U.SA
Page 3 of 3
Calibration
The unit is factory-calibrated and should require
no field adjustment. Generally, the mounting
position will have a zero shift effect on ranges below
one inch WC. If possible, any zero and/or span
offsets should be corrected by software adjustment
in the user's control system. However, both zero and
span adjustments are accessible either on the front
of the unit or by removing the optional conduit
enclosure. The sensor is calibrated in the vertical
position at the factory.
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
Figure 1.) For 0 to 10 Vdc output units, the factory
settings are 0.0 Vdc (± 100 mV) for unidirectional
pressure ranges, and 5Vdc (± 100 mV) for bi-
directional pressure ranges.
Span Adjustment
NOTE: Complete the zero adjustment before setting
span.
To adjust span or full-scale output, use only an
accurate pressure standard (such as an electronic
manometer or digital pressure gauge) with at least
twice the accuracy to this unit (<±0.5% FS). With full
range pressure applied to the high pressure port
(reference port open to atmosphere), adjust the
span by turning the SPAN adjustment screw. (See
Figure 1.) For 0 to 10 Vdc output units, the factory
settings are 10 Vdc (±100 mV) for unidirectional and
bi-directional ranges.
The installation is now complete.