®
Dual Load Cell Amplifier
Specifications
4
Oversampling
Oversampling occurs at low sampling rates when several measurements are recorded
and averaged over a short interval of time and the averaged value is displayed. The
degree of oversampling that takes place within the Dual Load Cell Amplifier depends
on the sample rate. For example, for a sample rate less than or equal to 2 Hz, the num-
ber of samples counted and averaged is 255.
Specifications
Pinouts
Following are the pin assignments for the six-pin mini-DIN jacks. The jack has two
pins dedicated to sensing the range of the PASCO Load Cell connected to it: Range
Select 1 and Range Select 2.
Measurement Ranges
± 100 N*
Accuracy
±1%
Resolution
0.003 N
Maximum Sample Rate
1000 Hz
Differential input voltage for any load cell
± 9.96 mV
Pin
Signal
1
+ Strain Gauge Output
2
+4.2 V
3
- Strain Gauge Output
4
Ground
5
Range Select 1
6
Range Select 2
1.
Click
to open the Experiment Setup window. Click
to open the calibration dialog box.
2.
From the Sensor field, select the Load Cell Amplifier.
3.
Select the “Calibrate all similar measurements simulta-
neously” option.
4.
Arrange all of the Load Cells so that the same amount of mass
is hanging from each Load Cell.
5.
Observe the Present Sensor Measurement and wait until it has
stabilized.
6.
From the Calibration Type menu, select 1 Point (Adjust Off-
set Only).
7.
Click the Read From Sensor button for Point 1.
8.
Click OK to accept the new calibration; or click Cancel to
revert to the previous or default calibration.
Sample
Rate
Samples
Counted
1Hz
255
5Hz
128
10Hz
64
20Hz
32
100 Hz
16
200 Hz
8
200 Hz
1
5
4
3
2
1
6
Range
Select 1
Range
Select 2
Range
ground
ground
± 5 N
open
ground
± 100 N
ground
open
± 1,000 N
open
open
no cell
connected