3
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 there.
Fig. 5
1.7
The metal case is illustrated as follows:
Fig. 6
2.
Explanation of adjustment point. Please refer to Fig. 7.
(1)
SW1: Switch 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 1/10.
(5)
VR1: Variable resistor for adjusting low frequency CMRR.
(6)
VR3: Variable resistor for adjusting accuracy.
(7)
VC1: Variable capacitor for adjusting square wave compensation and high frequency CMRR.
(8)
VC2: Variable capacitor for adjusting square wave compensation.
(9)
CON1: Power jack for connecting to 6VDC power adapter.
