Omega Engineering Marine Instruments DPG10L User Manual

User’s Guide  
DPG10L  
LARGE DISPLAY  
PRESSURE GAUGE  
M3367/0606  
 
M3367/0606  
DPG10L  
Table of Contents  
Warranty/Disclaimer.........................................................................2  
Return.Requests/Inquiries.................................................................3  
Instructions.......................................................................................4.  
. To.Zero.or.“TARE.OUT”.an.existing.offset...................................4  
. To.select.PEAK.HI.or.PEAK.LO.hold.functions............................4  
. To.set.Alarms..................................................................................5  
. Zero.Trimming................................................................................6  
. Re-calibration................................................................................6  
. Battery.Replacement......................................................................6  
Output.Options..................................................................................7  
. 0-2.V.Analog.Output.Signal.Option...............................................7  
. Alarm(s).Option.............................................................................7  
Wiring................................................................................................8  
1
 
DPG10L  
M3367/0606  
• 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 contact points,  
fuses, and triacs.  
OMEGA is please 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 even 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.  
 
M3367/0606  
DPG10L  
• 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 OMEGAS 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 Returns  
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 problem relative to the product.  
Non-Warranty Repairs  
For NON-WARRANTY REPAIRS, consult OMEGA for current repair  
charges. Have the following information available BEFORE contact 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 problem relative to the product.  
3
 
DPG10L  
M3367/0606  
• Instructions  
The model DPG10L Digital Pressure Gauge has several features not normally  
found as standard in Digital Pressure Gauges. These include the Analog Scale,  
Tare, and Peak Holds. The Analog Scale is a 40 segment display that appears  
around the edge of the liquid crystal display. This scale represents the pressure  
reading as a percentage of full scale, and each individual segment equals 2.5%.  
The Tare feature provides a method of zeroing out an existing offset such as the  
weight of the platform on a hydraulic scale. The Hold feature allows the user to  
select Hi or Lo. When the Hold is enabled the reading displayed is the highest  
or lowest pressure experienced in the system since Hold was enabled, and this  
information will continue to be updated at the rate of six times a second until  
Hold is disabled.  
1.0 To Zero or “TARE OUT” an existing offset  
1.1 Press and hold the “MODE” key until the reading starts flashing. Release  
“MODE” key.  
1.2 Press “ENTR” key until the reading becomes 0000.  
.
NOTE:.Tare.range.is.100%.of.Full.Scale.  
1.3 To return to the Gross reading press and hold “ENTR”, then with  
“ENTR” still depressed press “MODE” until the reading returns to the  
gross, then release both keys.  
2.0 To select PEAK HI or PEAK LO hold functions  
2.1 Press and hold the “MODE” key until the reading starts flashing. Release  
the “MODE” key, then press “MODE” key once more, the display will  
read “HOLD”. Press “ENTR” key once, the display will read “NO H”.  
Using “up” or “down” keys select “NO H” (no Hold), “H Lo” (Peak  
Low Hold), or “H Hi” (Peak High Hold). Press “ENTR” key to lock your  
selection.  
.
NOTE:.When.the.Hold.function.is.enabled.“PEAK”.is.displayed,.this.will.  
be.the.same.for.“Hi”.or.“Lo”.Hold..You.must.remember.which.you.have.  
engaged.  
2.2 To reset after capturing a Hi Peak or Lo Peak, Press and hold “MODE”  
key until the reading starts flashing. Release the “MODE” key, then press  
“ENTR”, hold momentarily then release.  
 
M3367/0606  
DPG10L  
2.3 To disengage Hold press and hold the “MODE” key until the reading  
starts flashing. Release the “MODE” key then press the “MODE” key  
once more, the display will read “HOLD”. Press the “ENTR” key, the  
display will read “NO H” Press the “ENTR” key once more and the  
display will return to reading the system pressure.  
3.0 To Set Alarms  
3.1 Press and hold the “MODE” key until the reading starts flashing, then  
Press the “MODE” key twice more. The display will read “AL 1”. Press  
the “ENTR” key to display the alarm setting. Pressing the “ENTR” key  
again will set the alarm and return the display to the normal mode. If the  
alarm setting is to be changed, the “up” and “down” keys can be used to  
increase or decrease the setting one count at a time, Pressing the “MODE”  
key and holding it down while Pressing “up” or “down” momentarily will  
change 10 counts for each key operation. If the “MODE” key and “up” or  
“down” are held down simultaneously, the setting will ‘FREE RUN’ until  
the key is released.  
.
NOTE:.While.setting.the.alarm,.only.one.segment.of.the.analog.scale.is.  
displayed.and.it.corresponds.to.the.%.full.scale.of.the.alarm.setting.  
3.2 When the desired alarm setting is displayed, Press “ENTR” to set and  
return to normal mode.  
3.3 To set alarm 2: Press and hold the “MODE” key until the reading starts  
flashing, then Press the “MODE” key three more times. The display will  
read “AL 2”. Press “ENTR” key to display the alarm setting. Pressing  
the “ENTR” key again will set the alarm and return the display to the  
normal mode. If the alarm setting is to be changed, the “up” and “down”  
keys can be used to increase or decrease the setting one count at a time,  
Pressing the “MODE” key and holding it down while Pressing “up” or  
“down” momentarily will change 10 counts for each key operation. If  
the “MODE” key and “up” or “down” are held down simultaneously, the  
setting will ‘FREE RUN’ until the key is released.  
.
NOTE:.While.setting.the.alarm,.only.one.segment.of.the.analog.scale.is.  
displayed.and.it.corresponds.to.the.%.full.scale.of.the.alarm.setting.  
3.4 When the desired alarm setting is displayed, Press “ENTR” to set and  
return to normal mode.  
 
DPG10L  
M3367/0606  
3.5 The alarm set point indicator segment of the bar graph will “blink” when  
that set point is activated. The hookup of optional outputs is covered later  
in this manual  
4.0 Zero Trimming  
4.1 Should it be necessary to readjust the Zero setting, an adjustment has  
been provided. Prior to adjusting the zero, verify that you are displaying  
the “gross” zero reading by performing step 1.3. On the back of the case,  
in the upper left, there are two cover screws labeled “Z” and “S”. Remove  
the screw covering the “Z” and utilizing a jewelers screwdriver, turn the  
small screw to re-zero the unit. The ideal zero is indicated by a reading of  
0000 with an intermittently flashing “-” sign.  
.
NOTE:.Do.not.readjust.the.“S”.as.this.will.invalidate.the.factory.  
calibration.  
5.0 Re-calibration  
This procedure requires a known pressure source of at least 0.1% accuracy  
in order to fully utilize the potential of the DPG10L (If not available, the gauge  
may be returned to OMEGA for re-certification)  
5.1 With 0 psig applied (port vented) adjust zero per instructions of 4.0.  
5.2 Apply full scale pressure to the pressure port and adjust the “S” until the  
display reads the correct pressure.  
5.3 Re-check zero and re-adjust the zero if required.  
5.4 Repeat steps 5.2 and 5.3 until no further adjustment is required.  
6.0 Battery Replacement  
6.1 To access the battery, the unit must be partially disassembled. Remove  
the thread ring surrounding the lens by turning counter clockwise. Carefully  
turn the unit face down with one hand prepared to “catch” the lens and  
display board as they fall from the housing. Do not allow the display board  
to fall more than an inch or two as there are wires connecting it to the main  
housing.  
6.2 Disconnect the two wire connector that leads from the batteries to the  
electronic. Then remove the battery or batteries from the holder(s) and  
replace with the same type that was removed, taking care to observe the  
correct polarity. Re-connect the battery connector.  
6
 
M3367/0606  
DPG10L  
• DPG10L Output Options  
Several output signals are available on the circular 6 pin connector located on  
the rear of the unit. Depending on the option selected the signals are present on  
pins as follows.  
DPG10L Pin Out Table  
4-20 mA  
with Alarm  
+ Excitation  
– Excitation  
Dig Gnd  
Alarm 2  
Alarm 1  
Gnd  
0-5 VDC  
with Alarm  
+ Excitation  
+ Output  
– Out/– Ex  
Alarm 2  
0-2 VDC  
with Alarm  
N/C  
+ Output  
– Output  
Alarm 2  
Alarm 1  
Gnd  
Ex Pwr  
+ Pwr  
– Pwr (Com)  
N/C  
0-5 VDC  
+ Excitation  
+ Output  
– Output  
– Excitation  
N/C  
0-2 VDC  
N/C  
+ Output  
– Output  
N/C  
4-20 mA  
+ Excitation  
– Excitation  
N/C  
N/C  
N/C  
A
B
C
D
E
N/C  
N/C  
N/C  
N/C  
N/C  
Alarm 1  
Dig Gnd  
Gnd  
F
N/C  
N/C indicates no connection.  
1. 0-2 V Analog Output Signal Option  
The analog output signal is available on pins B and C of the circular 6 pin  
connector located on the rear of the unit. The signal is short circuit protected and  
capable of driving low impedance external loads with fixed gain to a specified  
output level, with 10K Ohm and above loads. Frequency response is a function  
of the pressure range, generally 1 to 3 KHZ. Loading of the analog output will  
result in a reduction of the battery life expectancy due to the additional current  
through the external load.  
2. Alarm(s) Option  
The two open drain alarm output signals are present on pin D (alarm 2) and  
pin E (alarm 1) of the output connector. The alarm trip-points are software  
selected by using the unit’s front key-pad (see section 3.0 in the instructions  
section of this manual). When active, they are capable of sinking 500 mA at 60  
VDC Max with 7.5 ohms typical ON resistance to the digital ground as if they  
were two independent SPST normally closed switches with one end connected  
to the digital ground and the other end presented as an output. The typical  
configuration will require an external power supply and a 1 to 10K Ohm pull up  
resistor connected between the positive terminal of the power source and each  
alarm output. Inductive load switching such as small solenoids or relays is also  
possible utilizing the alarm output as a “low side switch”. The use of a diode or  
a capacitor across the load terminals is required to reduce “kick-backs”.  
7
 
DPG10L  
M3367/0606  
• Wiring  
Typical 4-20 mA Circuit  
Typical 4-20 mA Circuit with Open Collector Alarms  
Process  
Gauge  
Gauge  
Process  
Controller  
Connector  
Connector  
Controller  
+ EXCITATION  
A
+Excitation  
+Vin  
A
B
C
D
E
+Vin  
4-20mA Loop  
– EXCITATION  
B
-Excitation  
Dig Gnd  
Alarm 2  
Alarm 1  
Gnd  
R
L
R
L
C
DC* Power  
Supply  
4-20 mA  
D
E
F
CURRENT  
LOOP  
Alarm  
Loads  
-
+
F
(Optional but recommended  
for surge protection)  
*Any voltage up  
to 60 VDC @  
160 mA max.  
Typical 0-5 VDC Circuit  
Gauge  
Connector  
R
R
= 250 ohm for 1-5 V output  
= 500 ohm for 2-10 V output  
DO NOT EXCEED 750 OHMS WITH 24 VDC SUPPLY.  
L
L
+ EXCITATION  
A
+
SUPPLY  
VOLTAGE  
B
C
D
E
+ OUTPUT  
– OUTPUT  
NOTE: Alarm loads may be relay coils as shown below.  
Connect 1 A 400 V diodes to protect from relay "kick".  
– EXCITATION  
Alarm 2  
To + Power  
Alarm 1  
F
 
Thank You for Purchasing  
OMEGA Products  
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.  
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.  
Again, thank you for your interest in OMEGA.  
We welcome the opportunity to help you achieve your application goals.  
 
OMEGAnet® On-Line Service  
Internet e-mail  
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TEL: (203) 359-1660  
FAX: (203) 359-7700  
FAX: (514) 856-6886  
Canada:  
976 Bergar  
Laval (Quebec) H7L 5A1  
TEL: (514) 856-6928  
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®  
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En Español: (001) 203-359-7803  
FAX: (001) 203-359-7807  
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Toll Free in Germany: 0800 TC-OMEGASM  
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M44 5EX, United Kingdom  
TEL: +44 (0) 161 777 6611  
FAX: +44 (0) 161 777 6622  
Toll Free in the United Kingdom: 0800 488 488  
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.  
© Copyright 2005 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.  
 

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