Cooper Instruments DPG100 Installation Manual
DPG 100
DIGITAL PRESSURE GAGE
USER’S GUIDE
http://www.cooperinstruments.com
PH: (540)349-4746 • FAX: (540)347-4755
CONTENTS
CHAPTER 1 GETTING STARTED...........................................................................................1
1.1 Quick Start Guide ...................................................................................................................... 1
1.2 About This Manual ...................................................................................................................1
CHAPTER 2 INTRODUCTION .................................................................................................1
2.1 Overview ....................................................................................................................................1
2.2 Instrument Layout ..................................................................................................................... 1
2.2.1 LCD Display .......................................................................................................................1
2.2.2 Low Battery Indicator........................................................................................................2
2.2.3 Decimal Point Position...................................................................................................... 2
2.2.4 Incremental Display Step..................................................................................................2
2.2.5 Pressure Port Threads ...................................................................................................... 2
2.3 Maximum Safe Overpressure...................................................................................................2
2.4 Front and Side Views ................................................................................................................ 3
2.5 Dimensions ................................................................................................................................ 4
2.6 Specifications ............................................................................................................................ 5
2.7 Accessories ...............................................................................................................................5
CHAPTER 3 SET UP................................................................................................................6
3.1 Installation .................................................................................................................................6
3.2 Front Panel Rotation ................................................................................................................. 6
3.3 Power Supply Options .............................................................................................................. 7
3.3.1 Battery ................................................................................................................................7
3.3.2 AC Adapter.........................................................................................................................7
3.3.3 External Vehicle (DC) Power Supply ...............................................................................7
3.4 Turning the Instrument On and Off .........................................................................................7
3.5 Zeroing the Display ................................................................................................................... 7
3.6 Restoring the Calibrated Zero..................................................................................................8
3.7 Reading the High/low Values ...................................................................................................8
3.8 Clearing the High/low Values ................................................................................................... 8
CHAPTER 4 CALIBRATION....................................................................................................8
4.1 Calibration Considerations ......................................................................................................8
4.2 Required Pressures ..................................................................................................................9
4.3 Calibration Procedure...............................................................................................................9
4.4 Rear View of Front Face Panel...............................................................................................10
4.5 Calibration Error Messages.................................................................................................... 11
CHAPTER 5 OUPUT SIGNALS .............................................................................................11
5.1 Output Signal Overview..........................................................................................................11
5.2 Specifications .......................................................................................................................... 11
5.2.1 Limit Relay Option...........................................................................................................11
5.2.2 0-5 VDC Output ................................................................................................................ 11
5.2.3 2-wire 4-20 mA Output ....................................................................................................11
5.3 Wiring Codes And Schematics ..............................................................................................12
5.3.1 Wiring To The Terminal Blocks......................................................................................12
5.3.2 Limit Option .....................................................................................................................13
5.3.3 0-5 VDC Output Option ...................................................................................................13
5.3.4 0-5 VDC Output And Limit Relay Option .......................................................................13
5.3.5 4-20 mA Output Option ...................................................................................................14
5.4 Explanation Of Limits .............................................................................................................14
5.5 Entering The Limit Setpoints .................................................................................................14
5.6 Trimming Of Analog Outputs .................................................................................................14
DPG 100 ii Rev Feb 2001
CHAPTER 6 FIELD SELECTABLE FEATURES ...................................................................15
6.1 Introduction ...............................................................................................................................15
6.2 Setup Menu Operation ............................................................................................................15
6.3 Low Limit Setpoint ("L-LO") Menu Item ................................................................................17
6.4 High Limit Setpoint ("L-HI”) Menu Item.................................................................................17
6.5 Enable Options ("EO") Description .......................................................................................17
6.5.1 Auto-Off Feature .............................................................................................................. 17
6.5.2 Always-On Feature .......................................................................................................... 17
6.5.3 [Zero] Button Disable Feature ........................................................................................ 17
6.5.4 [Hi/Lo] Button Disable Feature.......................................................................................17
6.5.5 [Clear] Button Disable Feature.......................................................................................18
6.6 Enable Options ("EO") Menu Item .........................................................................................18
6.7 Engineering Units ("UNlT”) Menu Item..................................................................................18
6.8 Analog Output Zero Scale ("A-LO") Item ..............................................................................19
6.9 Analog Output Full Scale ("A-HI ") Menu Item...................................................................... 19
6.10 Internal Firmware Version ("VER") Menu Item ..................................................................... 19
CHAPTER 7 TROUBLESHOOTING ......................................................................................19
7.1 Introduction .............................................................................................................................19
7.2 Help Message Codes ..............................................................................................................19
7.3 Troubleshooting Hints ............................................................................................................ 20
CHAPTER 8 POWER ADAPTER SPECIFICATION ..............................................................20
CHAPTER 9 WARRANTY REPAIR POLICY.........................................................................21
DPG 100 iii Rev Feb 2001
CHAPTER 1 GETTING STARTED
IMPORTANT! IT IS RECOMMENDED THAT YOU READ THIS DOCUMENT THOROUGHLY BEFORE
APPLYING POWER TO THIS UNIT. THIS DOCUMENT CONTAINS INFORMATION ON WIRING,
CALIBRATION, AND USE OF FEATURES.
1.1 Quick Start Guide
1. The instrument comes calibrated from the factory and needs no further calibration.
2. For battery powered instruments, install one or two alkaline batteries by removing the rear center screw
and then the front faceplate. See "Battery" in Section 3.3.
• If using an AC adapter, connect the adapter into the back of the instrument.
• If using a Vehicle powered or Loop powered instrument, use the wiring diagrams in Chapter 6.
3. Screw the instrument into place noting the correct threads. See "Installation" in Chapter 3.
• Up to and including 300 PSI = 1/4 18 NPT [Pipe thread] (3/4" Hex)
• Above 500 PSI = 9/16- 18 UNF [Straight thread] (7/8" Hex)
4. Push the [On/Off] button.
5. You are now ready to monitor pressure.
1.2 About This Manual
This is the User's Guide for standard Digital Pressure Gages. Other instruments may be made available with
additional features, pressure ports and other options. As the product is continually improved, the information herein
is subject to change without notice.
CHAPTER 2 INTRODUCTION
2.1 Overview
The Digital Pressure Test Gage combines the latest in pressure transducer technology with modern microprocessor
electronics to provide a high-accuracy digital readout of process pressure. Stainless-steel construction, high overpressure protection and a solid-state design give these instruments a long lifetime with fewer recalibrations.
An easy-to-read digital display provides four ½” digits. The waterproof membrane face uses raised buttons with
tactile feedback for ease of setup and operation. Zero adjustment, zero offset/tare, high, low and clear functions are
standard on each instrument. Calibration and setup information is stored in non-volatile memory to protect from loss
even when power is interrupted. Unauthorized calibrations are also blocked with internal security. Field-selectable
units of measure allow one instrument to be re-configured for a variety of tasks.
2.2 Instrument Layout
2.2.1 LCD Display
The four ½” digit liquid crystal display (LCD) readout displays the pressure applied to the instrument, interacts with
the user when the instrument is being set up or calibrated, and indicates if there is a problem with the instrument.
When the instrument is turned on, it illuminates all LCD segments. Then the engineering units the gauge will be
using appear on the display. Most instruments are calibrated in PSI and the instrument has conversion factors for
many standard engineering units built in. However, if the instrument displays SPCL (special), it has been specially
calibrated to another engineering unit at the factory. In that case, the serial number tag on the top of the instrument
will indicate the engineering units being used and the capability to select other engineering units is not available.
After the display of the engineering units, the pressure applied to the pressure port is shown on the display. If the
pressure applied to the pressure port is above the instrument's ability to measure, the display will indicate this over
range condition by showing a "1" on the far left hand side of the display. The display will read "-1" if the instrument
is under ranged.
DPG 100 1 Rev Feb 2001
2.2.2 Low Battery Indicator
On the left side of the display, just above the minus sign, is the low battery indicator (in the shape of an arrow).
When the battery voltage is less than 5 volts, the display will be blanked and the low battery indicator will illuminate
to indicate that the batteries should be replaced. The low battery indicator can be seen when the instrument is
turned on and all segments of the display are momentarily lighted.
When the low battery indicator is illuminated, change the batteries as soon as possible. The instrument will not
function if the battery voltage falls below approximately 4 volts.
2.2.3 Decimal Point Position
The decimal point position automatically changes depending upon:
• the user selected engineering units
• the pressure range of the instrument
The decimal point position cannot be changed manually.
2.2.4 Incremental Display Step
The incremental display step is the value, which the last digit of the display will change by. This value will either be
1, 2, or 5 display counts. It automatically changes depending upon:
• the user selected engineering units
• the pressure range of the instrument
The incremental display step cannot be changed manually.
2.2.5 Pressure Port Threads
There are two types of pressure ports used, based on the operating pressure of the instrument. Male threads (for
ranges below 500 PSI) are ¼ -18 NPT. Female threads (for ranges 500 PSI and above) are 9/16-18 UNF-2B
straight thread with SAE spec J514 O-ring boss. An 0-ring is needed to seal all instruments with female threads.
Optional pressure adapters are listed in the "Accessories" section of this chapter.
2.3 Maximum Safe Overpressure
Maximum safe overpressure is the pressure that the instrument can experience occasionally without loss of
accuracy or permanent damage.
Table 1: Maximum Safe Overpressure
Pressure Range (PSI)
0-1=1 10
0 -5 = 5 25
0-15=15 75
0-30=30 150
0 -50 = 50 250
0-100=100 500
0-200 = 200 1000
0- 300 = 300 1200
0- 500 = 500 1500
0- 750 = 750 1500
0 -1000 = 1K 2000
0 -1500 = 1.5K 3000
0 -2000 = 2K 4000
0 -3000 = 3K 6000
0 -5000 = 5K 7500
0-7500 = 7.5K 12000
0-10000= 10K 15000
Maximum Safe
Overpressure (PSI)
DPG 100 2 Rev Feb 2001
2.4 Front and Side Views
Figure 2-1: Front View
Figure 2-2: Side View
DPG 100 3 Rev Feb 2001
2.5 Dimensions
Figure 2-3: Dimensions
DPG 100 4 Rev Feb 2001
2.6 Specifications
These specifications are subject to change without notice.
Enclosure Rating: NEMA 2 (standard),
NEMA 4 (optional; not available with AC Adapter
power)
Diameter: 3.7 inches
Linearity and Hysteresis: .2% of full-scale, linearity and hysteresis (better than
test gauge accuracy)
Operating Temperature: 30 to 160 °F (standard),
0 to 180 °F (with NEMA 4 option)
Pressure Ranges 0 to: 1, 5, 15, 30, 50, 100' 200, 300, 500, 750, 1K, 1.5K,
2K, 3K, 5K, 7.5K, 10K PSI
Calibration Engineering Units: PSI
Built-in Engineering Unit
Conversion:
Special Engineering Units: Optional
Display: 4 ½” LCD digits, 0.5 inches high
A-to-D converter sample rate: 7.8 kHz
Frequency Response ( -3dB): .78Hz
Display, Limits and Output
Update Rate:
Pressure Port: below 500 PSI:
Power Requirements: Battery Powered:
Wetted Parts: Stainless steel
Housing Material: Stainless steel
High and Low Capture: Standard, same update rate as display
Zero and Span Adjustment: Standard
Front Panel Membrane: Tactile feedback, raised buttons
Calibration Data: Stored on non-volatile memory chip
PSI, bar, mbar, inH
ftH2O (field selectable)
3 per second
1/4-18 NPT male
500 PSI and above:
9/16 -18 UNF-2B female with SAE spec J514 O-ring
boss
one or two 9 Volt alkaline batteries
AC Adapter Powered:
110 VAC@60 Hz adapter (included)
Vehicle (DC) Powered:
11 to 32 VDC (3 ft. cable included)
O, inHg, kPa, mmHG, MPa,
2
2.7 Accessories
PRESSURE ADAPTERS (Zinc Plated Steel)
To 1/4 -18 NPT female
To 1/4- 18 NPT male N/A
To 7/16- 20 UNF male with 37 degree flare
PRESSURE ADAPTERS (Stainless Steel)
To 1/4 -18 NPT female
To 1/4- 18 NPT male N/A
To 7/16- 20 UNF male with 37 degree flare
PANEL MOUNTING RING
CARRYING CASE
< 500 PSI
instruments
√ √
√ √
√ √
√ √
√ √
√ √
>= 500 PSI
instruments
√
√
DPG 100 5 Rev Feb 2001
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