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Testec SI-9001, Руководство по калибровке, Страница: 10 / 11

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Fig. 12 

 
 
 
 
 
 
 
 
 
 
 
 

1.12 Accuracy Adjustment 

a. Referring to Fig. 13, connect output BNC to a DMM. 
b. Connect the red input line to the positive terminal of a DC voltage source (70VDC) and the black 

input line to the negative terminal source (70VDC). 

c. Put SW1 at 1/10 (or 1/20). 

 

8

Содержание SI-9001

Страница 1: ...utes to keep it warm before the calibration starts Then follow the steps below Offset Adjustment A Referring to the Figure below connect both input lines black and red together thus actually shorting...

Страница 2: ...owever when VR4 is changed the Offset at 1 10 is affected thus we must calibrate again the 1 10 by repeating steps C and D G Again adjust the Offset at 1 100 by repeating steps E and F Through this co...

Страница 3: ...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 1 4 Use f...

Страница 4: ...on Fig 4 1 6 You will see the two metal cases There is one screw on the PCB Loosen it then the whole metal case can be taken out There are two wires still connected with the upper case Leaves them the...

Страница 5: ...ase connect a 6VDC power adaptor to CON1 as shown in the Figure above and turn on SW2 the LED indicator must light up Keep the unit turned on for 10 minutes to keep it warm before the calibration star...

Страница 6: ...be F Again referring to the Figure above adjust VR4 to make output voltage approach to zero This way the Offset is adjusted into range within 0 1mV However when VR4 is changed the Offset at 1 10 is af...

Страница 7: ...a 220 200VAC 60 50Hz power source c Put SW1 at 1 10 or 1 20 d Set the VOLTS DIV switch on oscilloscope s panel to 1mV and the TIME DIV switch to 5ms Then a 60 50Hz sinusoid waveform should be displaye...

Страница 8: ...ine to ground c Put SW1 at 1 10 or 1 20 d Set the VOLTS DIV switch on oscilloscope s panel to o 1V for 1 10 or 1 20 attenuation and the TIME DIV switch to 20us e Adjust VC1 to make the displayed wavef...

Страница 9: ...the oscilloscope has good grounding b Connect both input lines to a 155Vp p 20KHz sine wave signal source c Put SW1 at 1 10 1 20 d Set VOLTS DIV switch on oscilloscope s panel to 1mV and the TIME DIV...

Страница 10: ...ent a Referring to Fig 13 connect output BNC to a DMM b Connect the red input line to the positive terminal of a DC voltage source 70VDC and the black input line to the negative terminal source 70VDC...

Страница 11: ...d Adjust VR3 to make the output voltage equal to 6 9V or 3 51V for 1 20 Fig 13 9...

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