Digital Pressure Gauges
DPG1100L Series, NEMA 4X, 4-20mA Current Loop Powered
INSTRUCTION
SHEET
M3764/1101
Description
The DPG1100L is a 2-wire pressure transmitter with digital display. It is powered by the 4-20 mA current loop and produces a true analog output signal. The output is filtered to improve noise immunity. The temperature compensated piezoresistive transducer features 316 stainless steel wetted parts.
Installation Precautions
Tighten/remove with wrench on hex fitting only. Do not attempt to rotate gauge by turning housing. Use fittings appropriate for the pressure range of the gauge. Do not apply vacuum to gauges not designed for vacuum operation. NEVER insert objects into the gauge port or blow out with compressed air. Permanent damage not covered by warranty will result.
Electrical Connection
Connection to the DPG1100L is made with the 2-wire cable at the gauge rear. Connect the loop (+) supply to the RED lead and the loop (–) supply to the BLACK lead. Reversing the connections will not harm the gauge but the gauge will not operate with incorrect polarity.
Loop Voltage
Select a loop power supply voltage and total loop resistance so that when the loop current is 20 mA, the gauge will have at least 8 VDC at its terminals. Too large a loop resistance will cause the gauge output to “limit” or saturate before reaching its full 20 mA output. See graph below.
The minimum loop supply voltage may be calculated from the formula:
Vmin = 8V + (20mA x Total loop resistance)
Voltage Compliance for
4-20 mA Current Loop
1400
1200
1000
800
600
400
200
0
8 12 16 20 24 28
Loop Supply Voltage (DC)
32
SPECIFICATIONS
Ranges & Resolution
30.0 inHg vacuum, ±15.00, 3.00, 5.00, 15.00, 30.0 psig
100.0, 199.9, 300, 500, 1000 psig
Absolute reference: 15.00, 100.0 psia
Optional Units
Most engineering units such as kPa, atm, bar, mbar, inHg, mmHg, inH
2
O, ftH
2
O, torr, kg/cm 2 , cmH
2
O, oz/in 2
Display (type, size, update rate)
3 1 /
2 digit LCD, 1 /
2
" digit height
3 readings per second nominal display update
Accuracy (linearity, hysteresis, repeatability)
±0.25% of full scale or better, ±1 least significant digit
Loop Supply Voltage
Any DC supply/loop resistance that maintains 8 to 32
VDC at gauge terminals. Reverse polarity protected.
If the terminal voltage of the gauge falls below about 7.8
VDC erroneous reading or erratic operation may occur.
This is indicates that the loop supply/resistance may not have adequate headroom for reliable operation. This should never occur in normal use. If it does, check loop supply and resistance.
Operation
The DPG1100L is designed for continuous operation.
Warm-up time is negligible. The display will show the system pressure/vacuum, and the loop current also will be proportional to the system pressure/vacuum; 4 mA =
Zero or low end, 20 mA = Span, full-scale or high end.
TEST Button
When the TEST button is held depressed, the display and loop current are switched to a test level determined by the setting of the Test potentiometer. This test mode will allow setup and testing of the current loop by switching to this test level whenever desired without having to alter the system pressure.
To set the test output level see the gauge label for the location of the Test potentiometer. Press and hold the front-panel TEST button and adjust the Test potentiometer to set the display and loop current to the desired test level.
Calibration
See gauge label for location of individual controls to adjust the zero and span of the display.
GAUGE reference units may be re-zeroed without affecting the span calibration. The gauge port must be open to the ambient with no pressure or vacuum applied. Adjust the Zero control until the gauge reads zero with the minus (–) sign occasionally flashing.
Span calibration should only be attempted if the user has access to a pressure reference of known accuracy.
The calibration equipment should be at least four times the gauge accuracy. Zero calibration must be done before span calibration. Record readings at three to five points over the range of gauge and adjust span control to minimize error and meet specifications.
ABSOLUTE reference gauges require vacuum generation and atmospheric pressure measurement equipment for accurate calibration and thus are more difficult to calibrate in the field. Gauges may be returned to Omega Engineer ing for recalibration. N.I.S.T.
traceability is available.
The DPG1100L has internal controls to adjust the agreement between the displayed value and the 4-20 mA loop current. These are set at the factory and should not normally be adjusted. If adjustment is necessary, the display zero/span must be accurately set first. Then, after removing the rear cover, the Loop Zero and Loop
Span controls may be trimmed for 4.00 mA of loop current at the low end of the range, and 20.00 mA at the high end of the range, respectively. Accurate pressure generation and measurement and current measurement equipment are required to successfully complete this calibration.
1 /
4
OMEGA Engineering Inc. / Made in USA
" NPT
PSIG
Span
TEST
3.5"
Test Zero
0.75"
Output Characteristics
True analog output, 50 millisecond typical response time
Low Loop Warning (below approximately 7.8 VDC)
Colon appears on display
Controls & Location
TEST button sets output to test level, 0-100% range
Front zero, span & test potentiometers
Non-interactive zero & span, ±10% range
Internal potentiometers: Loop 4 mA and 20 mA
Temperature Stability (relative to 77°F or 25°C)
±1% FS for offset & span, 32 to 158°F (0 to 70°C) typical
±2% FS for offset & span, 32 to 158°F (0 to 70°C) typical for 3 and 5 psi ranges
Weight (approximate)
Gauge: 9 ounces, shipping weight: 1 pound
3.0"
2.0"
3 ft long,
2-conductor,
22 AWG shielded cable
0.75"
Turn at hex fitting only!
Housing
NEMA 4X
UV stabilized polycarbonate/ABS case, light gray color
Clear polycarbonate window to protect display
Gasketed rear cover, six captive stainless steel screws
Pressure/Vacuum Connection & Material
1 /
4
" NPT male, all wetted parts are 316 SS
Overpressure & Burst
5000 psig for metric units equivilant to 3000 psig
7500 psig for metric units equivilant to 5000 psig
All others 2x rated pressure minimum
Burst: 4x rated pressure minimum or 10,000 psi, whichever is less
Storage Temperature: –40 to 203°F (–40 to 95°C)
Operating Temperature: –4 to 185°F (–20 to 85°C)
Compensated Temperature: 32 to 158°F (0 to 70°C)
OMEGAnet
Servicing North America:
USA:
ISO 9001 Certified
One Omega Drive, P.O. Box 4047
Stamford CT 06907-0047
TEL: (203) 359-1660 e-mail: [email protected]
FAX: (203) 359-7700
Canada:
976 Bergar
Laval (Quebec) H7L 5A1
TEL: (514) 856-6928 e-mail: [email protected]
FAX: (514) 856-6886
For immediate technical or application assistance:
USA and Canada:
Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA ®
Customer Service: 1-800-622-2378 / 1-800-622-BEST ®
Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN ®
TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA
Mexico:
®
On-Line Service Internet e-mail www.omega.com [email protected]
Servicing Europe:
Benelux:
Postbus 8034, 1180 LA Amstelveen, The Netherlands
Tel: +31 (0)20 6418405 FAX: +31 (0)20 6434643
Toll Free in Benelux: 06 0993344 e-mail: [email protected]
Czech Republic:
Rudé armády 1868,73301 Karviná
TEL: +420 (0)69 6311899 FAX: +420 (0)69 6311114
Toll Free in Czech Rep.: 0800-1-66342 e-mail: [email protected]
France:
9, rue Denis Papin, 78190 Trappes
TEL: +33 (0)130 621 400
Toll Free in France: 0800-4-06342 e-mail: [email protected]
FAX: +33 (0)130 699 120
Germany/Austria:
Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
TEL: +49 (0)7056 3017 FAX: +49 (0)7056 8540
Toll Free in Germany: 0800 TC OMEGA SM e-mail: [email protected]
United Kingdom:
P.O. Box 7, Omega Drive,
ISO 9002 Certified Irlam, Manchester,
M44 5EX, United Kingdom
TEL: +44 (0)161 777 6611
Toll Free in England: 0800 488 488 e-mail: [email protected]
FAX: +44 (0)161 777 6622
Tel: (001) 800-826-6342
En Espan˜ol: (001) 203-359-7803
FAX: (001) 203-359-7807 e-mail: [email protected]
[email protected]
It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply.
OMEGA is constantly pursuing certification of its products to the European New Approach Directives.
OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient connected applications.
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 should malfunction, 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 being 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, EXPRESSED 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 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.
FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA:
1. P.O. 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 contacting OMEGA:
1. P.O. number to cover the COST of the repair,
2. Model and serial number of 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 2001 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 prior written consent of OMEGA ENGINEERING, INC.
