(1) What is the of A/B switch? If you are on A, would B still give you a voltage?
The role of A/B switch is to change the voltage displays between A and B. Yes, B would give a voltage but it would not appear on the display until the switch is on B. Also, the A/B will not change the value of the voltage and the current of A and B, For instance, If A is selected, the current and voltage of B will still be the same as it was when the switch was on B.
(2) In each channel, there is a current specification (either 0.5 A or 4A). What does that mean?
Current specification is the maximum current that can go through each channel, and there are two maximum current from two channels. In the fixed channel, there is only one voltage value which is 5 Volts and the current can go up to 4A. In A and B channels the voltage value can be changed from 0-24 Volts and the current can go up to 0.5 A.(3) Your power supply has two main operation modes for A and B channels; independent and tracking. How do those operation work? (Video)
In the video below I demonstrate how to change the power source from independents to tracking.
In the Independent setting the power source supplies to constant voltage sources that act completely independently of each other. In tracking the power sources are connected to each other depending on how they are wired they will act in a series or in parallel of each other.
In Tracking Series setting, by using the negative output port of B and the positive output port of A, the voltage that is read by the voltage meter on the power supply is doubled giving a range of 0-48 Volts and giving a current of 0.5 Amperes.
In Tracking Parallel setting the two sources A and B act in parallel of each other giving a range of 0-24 Volts but the current is doubled to 1 Amperes the current read from the meter on the power source will be doubled in the circuit.
Video 3.1 Shows where and how to switch the power supply to and from Independent to Tracking
(4) Can you generate +30 V using a combination of the power supply outputs? How? (Photo)
By using the tracking setting on the power source and connecting the power sources A and B in series and setting the Volts on A terminal to 15V the outputting Volts would be 30V.
Can you generate -30 V using a combination of the power supply outputs? How? (Photo)
By using the tracking setting on the power source and connecting the power sources A and B in series and setting the Volts on A terminal to 15V the outputting Volts would be 30V. This time switch the polarity switching the wire perviously attached to the positive output to the negative output and the wire perviously attached to the negative output the the positive output.
|Figure 5.1 Shows how power supply is setup and shows the reading from the DMM|
(6) Can you generate +10 V and -10 V at the same time using a combination of the power supply outputs? How? (Photo)
Yes by setting it up the power source in independent setting and both A and B are set to 10V or in tracking setup as a parallel and A set to 10V. Then send the negative of A to ground and use the positive for 10V output and send the positive of B to Ground and use the negative as the -10V output.
|Figure 6.1 Shows the setup of the power supply.|
|Figure 6.2 Shows the positive 10V reading, or close to.|
|Figure 6.3 Shows the negative 10V reading.|
(7) Apply 5V to a 100 Ω resistor and measure the current by using the DMM. Compare the reading with the current meter reading on the power supply. At what angle of the current knob makes the LED light on? If you keep on decreasing the current limit, what happens to the voltage and current? (Video)
The light turned on when the knob was parallel with the ground. As the current limit was decreased the voltage and the current started to drop until there was no voltage or current being supplied.
Video 7.1 Shows exactly when the light turned on while decreasing the current limit.
(8) Where is the fuse for the power supply? What is it for?
The fuse of the power supply is on the back of the it. And the purpose of it is to protect the device from being damaged.(9) Where is the fuse for the DMM? What is it for?
The fuse of the DMM is on left bottom of the front panel. The reason of the fuse is to protect the the equipment from high current.(10) What is the difference between 2W and 4W resistor measurements?
There is difference between the 2W resistor and 4W which is that the 4W resistor can measure to 1000W while the 2W resistor can only measure to 100W. The accuracy in the 4W resistor is higher then the 2W resistor. Also, the 4W resistor allow maximum input of 250V dc or ac rms while 2W allow up to 500 V dc or ac rms. Moreover, the 4W resistor is more accurate than the 2W resistor
(11) How would you measure current that is around 10 A using DMM?
The DMM has 2A max port and 12A max port, to measure 10A current, the red lead should be moved to 12A port and the black lead should be kept in its position.