WPI SI-BAM21-LC, Инструкция по эксплуатации

Страница: 7 / 20

SI-BAM21-LC
World Precision Instruments 3
INSTRUMENT DESCRIPTION
Front Panel
The front panel of the SI-BAM21-LC is shown in Fig. 2 .
Zero Button
Gain Switch
Data
Acquistion
Output
Force
Transducer
Connection
Fine Tune
Switch
Fine Tune LEDs
Zeroing LED
Gain Indicator LEDs
Gain Calibration
Potentiometer
Fig. 2—Front panel of the SI-BAM21-LC
Zero Button –When pressed, the SI-BAM21-LC output comes close to zero and the
Zeroing LED illuminates. Before any measurements are taken, the SI-BAM21-LC should be
zeroed to establish a baseline value for the force transducer.
Fine Tune Switch –This toggle switch allows you to fine tune the system after zeroing. Press
and hold the toggle switch to the left if you want to raise the baseline. Or, press and hold
the toggle switch to the right to lower the baseline. If the baseline is more that 0.3V above
zero, the High LED illuminates, and if it is less than –0.3V, the Low LED illuminates. When the
baseline is within 0.3V of zero, the LEDs are off.
Gain Switch –Under normal conditions, the Gain switch is set to X1. The current output
of the force transducer can be amplified by a factor of 2, 5 or 10. Press the Gain switch to
toggle between the gain settings. A Gain Indicator LED illuminates to show which gain
factor is applied. Larger gains are essential when working with extremely small forces.
Gain Calibration Potentiometer –Adjusting this potentiometer defines the gain applied.
Use the provided potentiometer adjustment tool (WPI # 13661 ) to calibrate the output
voltage scale factor to the force transducer current. See “Calibrating the SI-BAM21-LC ” on
page 5.
Data Acquisition Output –Connect a data acquisition system like WPI’s Lab-Trax to this
BNC connector to record the SI-BAM21-LC voltage output. For test purposes, a multi-meter
or oscilloscope may be connected using a standard BNC cable (WPI # 2851 ).
Force Transducer Connection –A SI-KG series force transducer is plugged into this DIN
connector. Align the pins, and insert the connector until it is fully seated.
Digital Interface –This connection is reserved for future use with an anti-oscillation unit.