Sapphire Instruments SI-9071 Calibration Procedure Download Page 1

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Sapphire Instruments Co., Ltd.

Calibration Procedure of SI-9071

How to open the case, please follow the steps.

1.1

Remove the battery lid.

1.2

You will see the two screws and loosen them.

Fig. 1

1.3

Near the BNC cable side, there are two protuberant mortises. Use fingers to push back and pull

upward.

Fig. 2

Summary of Contents for SI-9071

Page 1: ...e of SI 9071 1 How to open the case please follow the steps 1 1 Remove the battery lid 1 2 You will see the two screws and loosen them Fig 1 1 3 Near the BNC cable side there are two protuberant morti...

Page 2: ...2 1 4 Use fingers to press the bottom case inward and pull it backward and upward Fig 3 1 5 Hold the bottom case and push back to input lines direction Fig 4...

Page 3: ...witch for selecting attenuation ratio 2 SW2 Power switch 3 VR4 Variable resistor for adjusting offset when SW1 at attenuation 1 100 4 VR2 Variable resistor for adjusting offset when SW1 at attenuation...

Page 4: ...er to CON1 and turn SW2 on to warm up for 10 minutes Then follow the steps below No Item Minimum Requirements 1 Power Supply 6VDC 500mA or 9VDC 300 mA mains adaptor or 4xAA cells 2 DMM DC Accuracy 0 5...

Page 5: ...to a DMM c Put SW1 at attenuation 1 10 d Adjust VR2 to make output voltage approach to zero as small as possible e Put SW1 at attenuation 1 100 f Adjust VR4 to make output voltage approach to zero as...

Page 6: ...signal lead and the black input line to ground lead d Put SW1 at attenuation 1 10 e Set the VOLTS DIV switch on oscilloscope s panel to 0 1V at attenuation 1 10 and the TIME DIV switch to 200 us f Adj...

Page 7: ...to 600Vp p 60 Hz sine wave c Put SW1 at attenuation 1 10 d Set the VOLTS DIV switch on oscilloscope s panel to 1mV and the TIME DIV switch to 2ms Then a 60 Hz sinusoid waveform should be displayed on...

Page 8: ...the Sine wave signal source to 200Vp p 20kHz sine wave c Put SW1 at attenuation 1 10 d Set VOLTS DIV switch on oscilloscope s panel to 5mV and the TIME DIV switch to 2ms f Adjust VC1 slightly to make...