Dwyer HATX - Manual (Page 2)

Adjustments (with cover removed)
1. Before making any adjustments, determine which circuit board
diagram on page 2 matches the circuit board in your transmitter.
2. Turn off excitation power during cover removal or replacement.
3. Touching any adjustments other than zero or span may
necessitate recalibration and voids the warranty.
ZERO OUTPUT
Output can be adjusted to zero by potentiometer as shown in diagram. Unit
factory adjusted to 0.00 VDC output (±5 mV).
SPAN
Can be adjusted by potentiometer as shown in diagram. Unit factory
adjusted to 5.00 VDC FS output (±5 mV).
LINEARITY - DO NOT TOUCH
Factory adjusted for best linearity.
Circuit Board 1
Circuit Board 2
NOTE: When circuit cover is removed, a zero shift can be noticed. The
zero will return by the same amount when the cover is replaced. This
displacement of the output should be taken into account when making
adjustments or during recalibration.
*Adjustments: Due to the high accuracy of this transmitter, adjustments to
zero and span should only be made with the use of primary pressure
standards of known accuracy higher than that of the Series HATX.
INSTALLATION INSTRUCTIONS FOR HOOK-UP
OF 4-WIRE PRESSURE TRANSMITTERS
Single Power Supply, Single Output
Power Supply (Nominal 24 VDC)
HATX - Pressure Transmitter (4 Wire Circuit)
Receiver - Digital Volt Meter or Data Acquisition System
Single Power Supply, Multiple Outputs
NOTE: The shield is internally commoned to the case and pressure port
of the transmitter. When the shield is connected to ground the case and
pressure port of the transmitter will also be commoned to that ground.
MAINTENANCE
Upon final installation of the Series HATX High Accuracy Pressure
Transmitter, no routine maintenance is required. A periodic check of
system calibration is recommended. The Series HATX 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.
RECEIVER GREEN
WHITE
RED
BLACK
SHIELD
POWER
SOURCE
22 - 32 VDC
NOTE: GROUND 1 & 2 MUST BE ELECTRONICALLY ISOLATED
PRESSURE
TRANSMITTER
OUT
EX
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
©Copyright 2010 Dwyer Instruments, Inc. Printed in U.S.A. 12/10 FR# R1-443859-00
CAUTION
P-HATX:SSS-1000 12/27/10 3:35 PM Page 2