Omega PRESSURE GAUGES DPG3000 User manual

DPG3000
PRESSURE GAUGES
M-3449/0499
MADE IN
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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 con-
tacting OMEGA:
1. Purchase O rder 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 improvement is possible. This affords our
customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2004 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.
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 unautho-
rized 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
WARRANTY 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.
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 PRO-
CESSING 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, insur-
ance and proper packaging to prevent breakage in transit.
Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA…Of Course!
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TEMPERATURE
䡺⻬ Thermocouple, RTD & Thermistor
Probes, Connectors, Panels &
Assemblies
䡺⻬ Wire: Thermocouple, RTD &
Thermistor
䡺⻬ Calibrators & Ice Point References
䡺⻬ Recorders, Controllers & Process
Monitors
䡺⻬ Infrared Pyrometers
PRESSURE, STRAIN AND FORCE
䡺⻬ Transducers & Strain Gages
䡺⻬ Load Cells & Pressure Gages
䡺⻬ Displacement Transducers
䡺⻬ Instrumentation & Accessories
FLOW/LEVEL
䡺⻬ Rotameters, Gas Mass Flowmeters &
Flow Computers
䡺⻬ Air Velocity Indicators
䡺⻬ Turbine/Paddlewheel Systems
䡺⻬ Totalizers & Batch Controllers
pH/CONDUCTIVITY
䡺⻬ pH Electrodes, Testers & Accessories
䡺⻬ Benchtop/Laboratory Meters
䡺⻬ Controllers, Calibrators, Simulators &
Pumps
䡺⻬ Industrial pH & Conductivity
Equipment
DATA ACQUISITION
䡺⻬ Data Acquisition & Engineering
Software
䡺⻬ Communications-Based Acquisition
Systems
䡺⻬ Plug-in Cards for Apple, IBM &
Compatibles
䡺⻬ Datalogging Systems
䡺⻬ Recorders, Printers & Plotters
HEATERS
䡺⻬ Heating Cable
䡺⻬ Cartridge & Strip Heaters
䡺⻬ Immersion & Band Heaters
䡺⻬ Flexible Heaters
䡺⻬ Laboratory Heaters
ENVIRONMENTAL
MONITORING AND CONTROL
䡺⻬ Metering & Control Instrumentation
䡺⻬ Refractometers
䡺⻬ Pumps & Tubing
䡺⻬ Air, Soil & Water Monitors
䡺⻬ Industrial Water & Wastewater
Treatment
䡺⻬ pH, Conductivity & Dissolved Oxygen
Instruments

DPG3000 Digital Pressure Gauge instructions
All units are factory calibrated prior to shipment.
1) ZERO TRIMMING:
Loosen the set screw retaining the front cover and rotate counter-
clockwise to remove. You will now have access to the zero adjust
potentiometer which is marked with a “Z”. An ideal zero is indicated
by a reading of 000 with an intermittently flashing “-” sign.
A jeweler screwdriver or an eyeglass screwdriver is a suitable
instrument. Be careful NOT to touch the “S” pot to the right, as
changing this adjustment will invalidate the factory calibration.
2) BATTERY REPLACEMENT:
After removing the front cover as in 1), loosen the small set screw at the
bottom of the Display Assembly and remove the Assembly from the
Housing (be careful of the Sensor Leads). The batteries can now be
pulled from the holders and replaced with P/N DPG-BAT-C or equivalent.
3) RE-CALIBRATION
This procedure requires a known pressure source of at least +/-0.1%
accuracy in order to fully utilize the accuracy potential of the DPG-3000.
(If not available, gauge can be returned for re-calibration).
4) PROCEDURE:
A) With 0 psig applied (port vented) adjust zero as per instructions in #1.
B) Apply full-scale pressure to the pressure port and adjust the span
(“S”) pot until display reads the correct pressure.
C) Re-check zero and re-adjust the zero (“Z”) pot if required.
D) Repeat steps B) and C) until no further adjustment is required.
5) 4/20 mA TRANSMITTER OPTION: (–A4 Option)
When equipped with this option the gauge no longer operates from batteries
but instead is “Loop Powered”. The loop connection is made to a
terminal strip located inside the housing. A voltage of between 9 and 32
VDC must be maintained at this connection (Red is positive “+” black is
negative “-”) to insure proper operation. Completion of the earth or
system ground (Green) is recommended for proper circuit protection.
Power supply voltage must be sufficient to maintain a minimum of 9 VDC
at the gauge terminals after “dropping” voltage across RL at full scale
current (20mA). Example: If RL = 250 ohm then “drop” is 0.02 Amps X
250 ohm = 5 volts. Therefore power supply minimum is 5V + 9V = 14V.
RE-CALIBRATION: Procedure is the same as in 3,except that there are 2 sets of
zero and span adjustments. The front panel controls affect the display and
the rear controls (remove electronics as in Step 2) affect the 4/20 mA signal.
NOTE:
DO NOT UNSCREW SENSOR FROM HOUSING, THIS WILL DAMAGE THE UNIT.
R
L
Green
Red
Black
Earth or
System Ground
Voltage
Output
+
+
–
–
D.C. Power
Supply
LOBAT
Kg/Cm2
ZS