Dwyer 629 - Manual (Page 4)

©Copyright 2012 Dwyer Instruments, Inc. Printed in U.S.A. 7/12 FR# 01-443277-00 Rev. 9
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOx 373 • MIChIgAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
MULTIPLE RECEIVER INSTALLATION
An advantage of the standard 4-20 mA DC output signal provided by the
Series 629 Differential Transmitter is that any number or receivers can
be connected in series in the current loop. Thus, an A-701 digital
readout, an analog panel meter, a chart recorder, process controlling
equipment, or any combination of these devices can be operated
simultaneously. It is necessary only that each be equipped with a
standard 4-20 mA input and proper polarity of the input connections be
observed when inserting the device into the current loop. If any of the
receiving devices displays a negative or downscale reading this
indicates that the signal input leads are reversed.
MAINTENANCE
Upon final installation of the Series 629 Differential Pressure Transmitter
and the companion receiver, no routine maintenance is required. A
periodic check of the system calibration is recommended. The Series
629 Differential Pressure Transmitter is not field serviceable and should
be returned if repair is needed (field repair should not be attempted and
may void warranty). Be sure to include a brief description of the problem
plus any relevant application notes. Contact customer service to receive
a return goods authorization number before shipping.