Vishay P3 Manuel utilisateur
March 2004 130-000109
Model P3
Strain Indicator
And Recorder
Instruction Manual
Vishay Micro-Measurements
P.O. Box 27777 Raleigh, NC 27611 USA
Telephone: (919) 365-3800
Facsimile: (919) 365-3945
www.vishaymg.com
© Copyright 2003-2004 Vishay Micro-Measurements Inc. Printed in USA
All Rights Reserved
TABLE OF CONTENTS
TABLE OF CONTENTS..........................................................I
1DESCRIPTION................................................................ 2
1.1 GENERAL ................................................................. 2
1.2 FUNCTIONAL FEATURES ..................................... 3
2SPECIFICATIONS.......................................................... 4
2.1 INPUT CONNECTIONS .................................................. 4
2.2 BRIDGE CONFIGURATIONS .......................................... 4
2.3 DISPLAY...................................................................... 4
2.4 DATA CONVERSION..................................................... 4
2.5 MEASUREMENT RANGE/RESOLUTION ......................... 5
2.6 MEASUREMENT ACCURACY ........................................ 5
2.7 GAGE FACTOR CONTROL ............................................ 5
2.8 BALANCE CONTROL .................................................... 5
2.9 BRIDGE EXCITATION ................................................... 5
2.10 COMMUNICATION INTERFACE ..................................... 5
2.11 DATA STORAGE .......................................................... 5
2.12 SHUNT CALIBRATION .................................................. 5
2.13 ANALOG OUTPUT........................................................ 6
2.14 POWER ........................................................................ 6
2.15 OPERATIONAL ENVIRONMENT .................................... 6
2.16 CASE ........................................................................... 6
2.17 SIZE &WEIGHT........................................................... 7
3FRONT PANEL............................................................... 8
3.1 USB INTERFACE ......................................................... 8
3.2 MEMORY CARD SLOT ................................................. 9
3.3 INPUT CONNECTORS.................................................... 9
3.4 LCD DISPLAY ........................................................... 10
3.5 KEYPAD .................................................................... 10
II
3.6 POWER CONNECTOR ................................................. 10
3.7 ANALOG OUTPUT CONNECTOR ................................. 10
4OPERATION ................................................................. 11
4.1 GETTING STARTED .................................................... 11
4.2 POWER UP................................................................. 11
4.3 INPUT CONNECTIONS ................................................ 12
4.3.1 Quarter Bridge Connections............................. 12
4.3.2 Half Bridge Connections.................................. 13
4.3.3 Full Bridges and Transducers........................... 13
4.4 OPERATIONAL MODES .............................................. 14
4.4.1 Run Mode Operation........................................ 14
4.4.2 Command Mode Operation.............................. 18
4.5 MENU COMMANDS.................................................... 18
4.5.1 Main Menu....................................................... 18
4.5.2 Select Channels Menu...................................... 19
4.5.3 Bridge Type Menu ........................................... 20
4.5.4 Gage Factor/Scaling Menu............................... 23
4.5.5 Recording Menu............................................... 27
4.5.6 Balance Mode Menu ........................................ 28
4.5.7 Shunt Calibration Menu ................................... 30
4.5.8 Options Menu................................................... 31
4.5.9 Display Options Menu ..................................... 32
4.5.10 Output Options Menu....................................... 33
4.5.11 Save Setup Option............................................ 34
4.5.12 Clock Options .................................................. 34
4.5.13 Advanced Options Menu ................................. 35
4.5.14 Calibrate System .............................................. 35
4.5.15 Erase MMC ...................................................... 39
4.5.16 Poisson’s Ratio................................................. 40
4.5.17 Factory Defaults............................................... 40
4.5.18 Version ............................................................. 40
5BATTERY REPLACEMENT ...................................... 41
III
6SOFTWARE OPERATION.......................................... 42
6.1 OVERVIEW ................................................................ 42
6.2 34
12
SELECT CHANNELS........................................... 44
6.3 BRIDGE TYPE ................................................... 45
6.4 KGAGE FACTOR/SCALING ................................... 46
6.5 POWER............................................................. 47
6.6 MENU MENU .............................................................. 48
6.7 RECORD............................................................ 49
6.8 BALANCE .......................................................... 52
6.9 CALIBRATE ....................................................... 54
6.10 BACKLIGHT ...................................................... 55
6.11 LOADING/SAVING SETUP INFORMATION ................... 56
6.12 TRANSFERRING DATA ............................................... 57
6.13 UPGRADING FIRMWARE ............................................ 59
- 1 -
Model P3 Strain Indicator and Recorder
- 2 -
1 DESCRIPTION
1.1 GENERAL
The Model P3 Strain Indicator and Recorder is a portable, bat-
tery powered precision instrument for use with resistive strain
gages and strain-gage-based transducers.
The Model P3 accepts full- half- and quarter-bridge inputs; all
required bridge completion components for 120-, 350-, and
1000-ohm bridges are supplied. The Model P3 utilizes tool-free
input connections, and is dust and moisture-resistant.
Operation of the Model P3 is straightforward and intuitive, us-
ing menu-driven commands, and can be controlled by either the
front panel keypad or remotely via a USB connection.
The Model P3 utilizes modern digital signal processing tech-
nology to provide excellent noise rejection and stability. Pro-
prietary scaling and linearization algorithms provide unsur-
passed measurement accuracy for strain gage bridge measure-
ments.
Data may be stored on industry-standard multimedia (MMC)
cards or streamed to a PC using the on board USB interface.
- 3 -
1.2 FUNCTIONAL FEATURES
The Model P3 Strain Indicator and Recorder incorpo-
rates the following features:
•Four input channels.
•Direct-reading, backlit LCD display.
•Data storage using the multimedia card.
•Hardware and software support for quarter-, half-
and full-bridge circuits.
•Built-in precision bridge completion for 120-, 350-
and 1000-ohm half and quarter bridges.
•Automatic and manual zero-balance and calibration.
•Intuitive, menu-driven operations.
•Full control of all functions via USB Interface.
•Selectable analog output.
•Portable, lightweight and rugged design.
•Battery, USB, or line-voltage power.
•Intuitive, user-friendly software.
- 4 -
2 SPECIFICATIONS
Note: Performance may be degraded at high levels of repetitive electrostatic
discharge; however, no damage to the unit will occur.
2.1 Input Connections
Type: Tool-free eccentric lever release
Quantity: Four
Wire size: 16 to 28 AWG [1.29 to 0.31mm Φ]
2.2 Bridge Configurations
Types: Quarter-, half-, and full bridges
Bridge Impedance: 60 to 2000 Ω
Internal Bridge Completion:
Quarter bridge: 120Ω, 350Ωand 1000Ω±0.01%
Half bridge: 1000Ω±0.01%
2.3 Display
Type: 128 x 64 pixel FSTN positive, gray transflective
LCD with backlight
Update rate: 2 updates/second typ.
2.4 Data Conversion
A/D Converter: Delta-sigma with integral chopper-
stabilized programmable gain instrumentation amplifier
Resolution: 24 bits. Noise-free resolution: 18 bits typ.
Output rate:
Normal mode: 50 or 60 samples/sec.
Analog output mode: 480 samples/sec.
Filter: Integrated linear phase FIR Sinc5filter followed
by a Sinc3filter with a programmable decimation rate.
Software selectable output rate provides >120 dB rejec-
tion of 50 or 60Hz and higher level harmonics.
- 5 -
2.5 Measurement Range/Resolution
Strain Range: ±31,000 µεat GF = 2.000. (±15.5 mV/V)
Resolution: ±1 µεat GF = 2.000 (±0.0005 mV/V)
2.6 Measurement Accuracy
±0.1% of reading ±3 counts. (Analog output disabled,
instrument Gage Factor = 2.000)
2.7 Gage Factor Control
Range: 0.500 to 9.900
2.8 Balance Control
Type: Software
Control: Manual or automatic
2.9 Bridge Excitation
Value: 1.5 VDC nominal
Control: Software enable/disable
Measurements are fully ratiometric, and not degraded by
variations in excitation voltage
2.10 Communication Interface
Universal serial bus (USB). Cable included
2.11 Data Storage
Type: Removable Multimedia Card (16M supplied).
Recording rate: Software-selectable from 1 reading per
second to 1 reading per hour
2.12 Shunt Calibration
Location: Across bridge completion resistors
- 6 -
Control: Software
Values:
P- to D120: 11.9KΩ±0.1% (5000µεat GF = 2.00)
P- to D350: 34.8KΩ±0.1% (5000µεat GF = 2.00)
P- to D1000: 99.5KΩ±0.1% (5000µεat GF = 2.00)
Remote calibration: Switch contacts at input terminal
block
2.13 Analog Output
Value: 0 to 2.5V max
Ranges: ±320 µε, ±3200 µε, ±32000 µε
Update rate: 480 samples/sec
Output Load: 2000Ω
Connector: BNC
2.14 Power
Battery: Two Alkaline "D" cells
Battery life: 400 hours typ.
AC Adapter: 6-15VDC 100mA
USB: 5V 100mA
2.15 Operational Environment
Temperature: 0° to +50°C
Humidity: Up to 90% RH. Non-condensing
2.16 Case
Material: Aluminum
Accessories: Two rubber grommets installed in the lid
allow leadwires to enter the case with the lid closed for
increased resistance to water splash
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