Omega Engineering Wet/Wet Differential Sensor PX838 - Manual (Page 3)

RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED
RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the
return package and on any correspondence. The purchaser is responsible for shipping charges,
freight, insurance and proper packaging to prevent breakage in transit.
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship
for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one
(1) month grace period to the normal one (1) year product warranty to cover handling and
shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone or
written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired
or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any
action of the purchaser, including but not limited to mishandling, improper interfacing, operation
outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if
the unit shows evidence of having been tampered with or shows evidence of having been
damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper
specification; misapplication; misuse or other operating conditions outside of OMEGA’s control.
Components which wear are not warranted, including but not limited to contact points, fuses, and
triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes
liability for any damages that result from the use of its products in accordance with
information provided by OMEGA, either verbal or written. OMEGA warrants only that the
parts manufactured by it will be as specified and free of defects. OMEGA MAKES NO
OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR
IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WAR-
RANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY
DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are
exclusive, and the total liability of OMEGA with respect to this order, whether based on
contract, warranty, negligence, indemnification, strict liability or otherwise, shall not
exceed the purchase price of the component upon which liability is based. In no event
shall OMEGA be liable for consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a
“Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or
(2) in medical applications or used on humans. Should any Product(s) be used in or with any
nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA
assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and,
additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or
damage whatsoever arising out of the use of the Product(s) in such a manner.
FOR WARRANTY RETURNS, please have the
following information available BEFORE
contacting OMEGA:
1. Purchase Order number under which the
product was PURCHASED,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product. FOR NON-WARRANTY REPAIRS, consult
OMEGA for current repair charges. Have the
following information available BEFORE contact-
ing OMEGA:
1. Purchase Order number to cover the COST of
the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improve-
ment is possible. This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 1999 OMEGA ENGINEERING, INC. All rights reserved. This document may
not be copied, photocopied, reproduced, translated, or reduced to any electronic
medium or machine-readable form, in whole or in part, without the prior written consent
of OMEGA ENGINEERING, INC.
Installation
CAUTION:
1. I
NCORRECT ELECTRICAL CONNECTIONS CAN , IN CERTAIN CIRCUMSTANCES , DESTROY THE ELECTRONIC OUTPUT
CIRCUIT .
2. B EFORE APPLYING ELECTRICAL POWER , MAKE SURE THE SUPPLY VOLTAGE IS TO THE CORRECT RATING .
3. T HIS A VERY SENSITIVE SENSOR . ONLY APPLY PRESSURE WITHIN THE PRESSURE RANGE .
Mounting
Two M5 threaded holes in the base of the sensor provide mounting points.
Note: The screws must not enter the holes more than 0.472" into the sensor body.
The installed position of the sensor should be away from sudden temperature variations,
shocks and vibrations and should not be close to strong electromagnetic fields
(transformers, motors etc.). The sensor can be mounted in any position, but mounting at
an angle may require zero adjustment.
terminal
block zero adjustment
(fine)
zero adjustment
(coarse)
span adjustment
cable gland
Internal detail
Electromagnetic Interference
To avoid electrical interference, use shielded cable with the shield connected to the earth
ground at both ends. The ground of the sensor can be the casing or the ground terminal
screw.
Electrical Connections
PX838 Series (current output)
The maximum allowable load resistance is calculated to
formula:
R Max = 0.05 (V supply - 10) k W
Where: R Max in k W and V in Volts
Minimum load 2k W
Note: Connections 5 and 6 are common.
If the output cable passes through an area of electrical
disturbance, use a recommended load impedance of
between 2 k
W and 10 k W . Connect the load resistance
between the wires corresponding to signal and - terminal at
a point furthest from the sensor; this produces a circulating
current.
PX838 Series (Unidirectional voltage output)