DSCUSB
Improved version
Load Cell and Strain Gauge Conditioning Amplifier Modules with USB output
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Features
Connects your strain gauge device
directly to your computer
High Stability gives high resolution
Converts your Load Cell etc into an
Intelligent Strain Transducer
Quick and easy connectivity via USB
ASCII protocols
PCB or cased "ready to go" versions
Digital I/O
High speed, to 500 readings/second
Real mV/V calibration
Peak and trough recordings
No additional power supply required
Introduction
The DSCUSB is a compact, high performance digital strain gauge signal conditioner with USB connectivity, providing high resolution data for many applications. Simply by plugging the device into a PC, data can be extracted from most strain gauge bridge input sensors (such as load cells, pressure and torque transducers and some accelerometers) acquired by software which allows data manipulation. No additional power supply is needed. Ideal for a 1 to 1 interface, multiple DSCUSBs may be connected also to a single USB port via a suitable hub. The DSCUSB operates using ASCII protocol.
Advanced Characteristics
An Intelligent Strain Transducer
High Performance
1 Year Manufacturer's Warranty
Serial Communications - excellent stability
Fieldbus connectivity - universal systems compatibility
Direct output in Engineering Units if required
Resolution selectable to 1 part in 200,000
"Plug in and go" sensor - no need for a separate amplifier
No need for an expensive A-to-D Card
Outstanding performance-to-cost ratio
Five-point transducer temperature compensation via comms
Seven-point transducer linearisation via comms
Sensor operation limit alarms
Reverse polarity protected
Continuous auto-zero operation
Ideal for precision measurement at low cost
Non-expert maintenance
Self diagnostics alerts user to common Strain Gauge faults:
Excitation short-circuits
Input over- or under-range
Cell scaling over- or under-range
System scaling over- or under-range
Temperature over- or under-range
Communication errors
Small package size
Works with most common strain gauge devices
Saves cost and space
Simple to use
Competitive prices
Ideal for OEM, R&D, Production, QA, QC applications
Full CE approval
RoHS compliant
Options:
Encased version with Type A USB lead
PCB Version with field connectors fitted
PCB Version with no field connectors (solder tab connections)
Cased version of DSCUSB
The DSCUSB is supplied with Instrument Explorer and the DSC Toolkit software applications to allow configuration, data display and logging.
DSCUSB PCBs
DSCUSBOEM (top) has no field connectors. DSCUSBOEM1 (bottom) has field connectors fitted.
Showing cable clearances using typical connectors.
Other products that may be of interest:
Precision vs Speed of Reading:
Generally, the higher the precision required from an analogue-to-digital system, the slower the speed of conversion to digital format. The DSCUSB allows you to select the resolution and speed of reading that you require according to the Table below:
| Speed Readings/sec (Hz) |
Resolution | ||
|
Divisions |
ppm |
% of Full Scale |
|
|
1 |
200,000 |
5 |
0.000005 |
|
10 |
120,000 |
8.3 |
0.00083 |
|
100 |
50,000 |
20 |
0.0020 |
|
500 |
18,000 |
56 |
0.0056 |
Product Order Codes:
|
DSCUSB |
Strain gauge to USB converter, cased |
|
DSCUSBOEM1 |
Uncased PCB Module
with field connectors |
|
DSCUSBOEM |
Uncased PCB Module without field connectors |
DSCUSBDIN |
DIN Rail Mounting Kit for DSCUSB PCBs |
|
DTEMP |
Temperature Sensor PCB
|
Specifications:
| Description |
Units |
High Stability |
||
| Min | Typ | Max | ||
| Strain Gauge Excitation System: | 4 wire |
|||
| Bridge Excitation: |
VDC |
4.5 |
5 |
5.25 |
| Bridge Impedence: |
Ohms |
320 |
350 |
5,000 |
| Bridge Sensitivity: |
mV/V |
-3 |
+2.5 |
+3 |
| Offset Temperature Stability: |
ppm/°C |
- |
1 |
4 |
| Gain Temperature Stability: |
ppm/°C |
- |
3 |
5 |
| Offset Stability With Time: |
ppm of FR* |
- |
35 |
160 |
| Gain Stability With Time: |
ppm of FR/1st Year |
- |
- |
300 |
| Nonlinearity Before Linearization: |
ppm of FR |
- |
5 |
25 |
| Internal Resolution: |
Counts/Divisions |
- |
16 Million |
- |
|
Resolution |
Counts/Divisions over 100s |
- |
200,000 |
- |
| Resolution @ 10 Hz: |
Counts/Divisions over 100s |
- |
120,000 |
- |
| Resolution @ 100 Hz: |
Counts/Divisions over 100s |
- |
50,000 |
- |
| Resolution @ 500 Hz: |
Counts/Divisions over 100s |
- |
18,000 |
- |
| Signal Filter : | Dynamic recursive type, user programmable |
|||
|
Optional: |
°C |
- |
0.0625 |
- |
|
Optional: |
°C |
- |
0.5 |
- |
| Optional: Temperature Measurement Accuracy (-55 to 125°C) |
°C |
- |
2.0 |
- |
| Optional: Temperature Update Speed |
s |
- |
5 |
- |
| Power Supply Voltage: |
VDC |
4.25 |
5 |
5.5 |
| Power Supply Current (350R Bridge): |
mA |
- |
70 |
80 |
| Sensor Impedence: |
Ohms |
320 |
350 |
5,000 |
| Operating Temperature Range: |
°C |
-40 |
- |
+85 |
| Storage Temperature: |
°C |
-40 |
- |
+85 |
| Humidity: |
% RH Non-condensing |
0 |
- |
95 |
| Data Transmission Rate: |
kbps |
2.4 |
- |
460.8 |
| Output Cable Length |
m |
- |
- |
1.5 |
Dimensions: |
71 x 51 x 20mm (2.79 x 2.00 x |
|||
| Dimensions: PCB Version DSCUSBOEM1 | 73 x 31 x 15.3mm (2.87 x 1.22 x 0.60") |
|||
| Dimensions: PCB Version DSCUSBOEM |
62.5 x 31 x 3.6mm (2.46 x 1.22 x 0.14") |
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| Communications (USB) | The load cell to USB adaptor will communicate as a simple serial device rather than a ‘native' USB device.
Once the device is plugged into a PC and the supplied drivers are installed, the device will appear as a Virtual Serial Port to the PC. Standard Modbus drivers, configurations and libraries can be used with this device. A driver is proviced forthe supplied "Instrument Explorer' software. Because each device, when plugged into a PC, creates an additional serial port, the total number of devices that can be attached to the PC may be limited by the communication software's ability to utilise these multiple ports i.e. an existing Modbus communication program may only support COM1 to COM4. |
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| Support Modules | Instrument Explorer software DSC Toolkit software DSCLOG24 Software |
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| Environmental Approvals: |
European EMC Directive Output shall not exceed the sum of uncertainties when subjected to an electric field of 10V/m over the frequency range 80 to 600MHz. |
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* FR = Full Range
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DSCUSB Digital Strain Gauge Conditioners:
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