Electronic workbench

Tutorial designed by: Natalie Chan, Innovation Wing tutor

Usage procedure





before usage


buddy system


  1. [For trained members] Only members who go through the training tutorial on this page can use the the equipment on the electronic workbench.
  2. [Talk to us] Before using the equipment on the electronic workbench, please inform our technical manager. If you do not have a project supervisor, please contact our staff (Director of Innovation Wing/ technical staff/ tutor staff), we are very happy to help you.
  3. [Operate the machine with tutors/technicians] Please operate those equipment with the presence of our tutors/technicians, they are experienced and are very happy to help.
General Safety in Electronic workbenches

The following rules are recapped from the safety manual of Innovation Wing on Machinery Safety

  • All users of machinery must wear safety spectacles. Long hair and loose clothes (including scarves, ties, sleeves) must be carefully tied. Suitable personal protective equipment should be worn.
  • Working alone in using/operating any powered machinery with exposed high speed moving/rotating part(s) is prohibited.
  • Further guidelines on machinery safety can be viewed at http://www.safety.hku.hk/homepage/pdf/MSG.pdf.
Equipment in Electronic Workbenches
  • Digital Oscilloscope
  • Digital multimeter
  • Arbitary waveform generator
  • Soldering set

Digital oscilloscope

Digital multi-meter

Arbitrary waveform generator

Operation manual for different common usage

1. DC Voltage Measurement V- (DCV):

1.1 Connect RED test lead to “VΩmA” jack, BLOCK test lead to “COM” jack.
1.2 Set the FUNCTION switch to the desired V- (DCV) position. If not sure, set to the highest range.
1.3 Connect the test leads across the source or load under measurement.

2. DC Current Measurement A- (DCA):

2.1 Connect the RED test lead to “VΩmA” jack when the current is less than 200mA and to “10A” jack when the current is larger than 200mA. Connect the BLACK test lead to the “COM” jack.
2.2 Set the JUNCTION switch to the desired DCA position.
2.3 Connect the test leads across the source or load under measurement.

3. AC Voltage Measurement V~:

3.1 Connect the RED test lead to “VΩmA” jack and BLACK test lead to “COM” jack.
3.2 Set the FUNCTION switch to the desired ACV position.
3.3 Connect the test leads across the source or load under measurement.

4. Resistance Measurement (Ω):

4.1 Connect the RED test lead to “VΩmA” jack and BLACK test lead to “COM” jack.
4.2 Set the FUNCTION switch to the Ω position.
4.3 Connect the test leads across the resistor under measurement.
4.4 When measuring the resistance, the power should be turned off and in short circuit statues by connecting the two test leads.

5. Transistor hFE Measurement:

5.1 Set the FUNCTION switch to hFE position
5.2 Insert the E B C. of the PNP or NPN transistor to the proper jack in the socket on the front panel.

6. 50Hz Square Wave Output:

6.1 Connect RED test lead to the “VΩmA” jack and BLACK test lead to the “COM” jack.
6.2 Turn the FUNCTION switch to position and the RED and BLACK test leads being the output jack.
Safety rules for DC Power Supply

DC Power Supply:


  1. Before applying power to your DC power supply, make sure that the power select switch is correctly set for your applicable AC power supply. 

  2. Connect the instrument to an AC power source using the power line core provided. 

  3. Do not connect a voltage that is greater than the current output voltage to the terminals of the instrument. 

  4. Never ground yourself when taking electrical measurements. Keep your body isolated from the ground by using dry clothing; rubber shoes, a rubber mat, or any approved insulating material.

  5. Never touch exposed wiring, connections or any live circuit when attempting to take measurements. 

  6. Avoid shorting the circuit of the output of the DC power supply. 

  7. Set the voltage and current adjustment knobs as you desire. 

  8. The unit should be stored in a dry and well-ventilated place and the power cord removed if stored for long periods.


How can a user become a trained operator? (E.g., online quiz + onsite demo)

Join our workshop !

Complete the above model.




  1. The meters can be safe only according to standard procedures when used in conjunctions with the supplied test leads. To replace damaged test leads with only the same model or the same electric specifications. 

  2. To avoid the risk of electric shock, do not use the meters before the cover is in place. 

  3. The range switch should be the right position for the testing. 

  4. To avoid electric shock and damaging the instruments, the input signals are forbidden to exceed the specified limits. 

  5. When measuring a TV set or switched power, attention should be paid to the possible pulses that may bring destruction to the circuit. 

  6. The range switch position is forbidden to be changed at random during measurement. 

  7. Take caution against shock in the course of measuring voltage higher than DC 60V & AC 30V. 

  8. The protection fuse should be replaced only with the same type and same specification. 

  9. After the operation is finished, set the function switch to OFF to save battery power.

  10. If the meter is without usage for a long time, take out the battery to avoid damage by battery leakage. 

Safety rules for Oscilloscope


  1. To Avoid Fire or Personal Injury

  2. Use the Proper Power Cord. Use only the power cord specified for this product and certified for the country of use.

  3. Connect and Disconnect Properly. Do not connect or disconnect probes or test leads while they are connected to a voltage source.

  4. Ground the Product. This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth the ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded.

  5. Connect the Probe Properly. The probe ground lead is at ground potential. Do not connect the ground lead to an elevated voltage.

  6. Observe All Terminal Ratings. To avoid fire or shock hazards, observe all ratings and marking on the product. Consult the product manual for further rating information before making connections to the product.

  7. Do Not Operate Without Covers. Do not operate this product with covers or panels removed.

  8. Use Proper Fuse. Use only the fuse type and rating specified for this product.

  9. Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present.

  10. Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel.

  11. Do Not Operate in Wet/Damp Conditions.

  12. Do Not Operate in an Explosive Atmosphere.

  13. Keep Product Surfaces Clean and Dry.

Safety rules for Soldering set

Soldering set


  1. Do not touch the tip or the metal parts near the tip.

  2. Do not allow the tip to come close to, or touch, flammable materials

  3. Inform others in the area that the unit is hot and should not be touched.

  4. Turn the power off when not in use or left unattended.

  5. Turn the power off when changing parts or storing them.

  6. This appliance is not intended for use by persons with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning the use of the appliance by a person responsible for their safety.

  7. if the power cord is damaged, it must be replaced by the manufacturer, its service agent or a similarly qualified person in order to avoid personal injury or damage to the unit.

  8. Do not use it for applications other than soldering.

  9. Do not strike the iron against hard objects to remove excess solder. This will damage the iron.

  10. Do not allow it to become wet, or use it with wet hands.

  11. Be sure the work area is well-ventilated, soldering produces smoke.

  12. While using this equipment, don’t do anything which may cause bodily harm or physical damage.

For Inquiries, Please Contact

Please contact

    • Natalie Chan (natcychan[at]hku.hk), the teaching assistant of the Tam Wing Fan Innovation Wing, or
    • Ryan chan (ryancck[at]hku.hk), the senior technical assistant of the Tam Wing Fan Innovation Wing