Basic Idea:

• Note: We have new field mapping apparatus that are located in the non-Major's storeroom, shelf L5. Jeff will create new setup instructions after the Spring 2024 semester!
• Measure the potential field of two "charges"

	What:	How Many:	Where:
All of the following are currently installed in the 152 lab; Hopefully the schedule has been arranged so that 104 students move to the 152 lab
	Conducting paper mounted on foam board	1	Majors storeroom, shelf E1
	Meter probe (red)	1	Majors storeroom, hanging in the center aisle
	36" or 48" black wire	1	Bewkes 231 (Phys 152 Lab)
	Digital multimeter	1	Majors storeroom, locked in steel cabinet
	9-volt DC battery	1	non-Majors storeroom, shelf L3
Place two extra multimeters on small bench by the sink (for spares)
	Digital Multimeter	2	Majors storeroom, locked in steel cabinet
The following components are installed under the front bench; Ask Jeff if we're using Two single- or One Dual-power supply!
	Either: Dual power supply	1	Majors storeroom, shelf C2
	Or: 40v regulated power supply	2	Majors storeroom, shelf C2
	Digital Multimeter	1	Majors storeroom, shelf A3
	Wires	12" – 2 (black) 24" – 2 (1 black, 1 red) 48" – 3 (2 black, 1 red)	Bewkes 231 (Phys 152 Lab)

Notes:

• Lab setup (see the photo details page as well as the wiring diagrams found below):
• Note: Currently, this experiment has been performed in Phys152 the week before, so all equipment simply needs to be moved to this lab. Since the power supplies sit below the bench, longer wires are needed to reach the power panel connectors.



• Main power supply connection:
  • Note: The big power supply in the stockroom is used to distribute voltage to the lab benches from the lab power supplies. Jeff will take care of this following his instructions for configuration with an external power supply.
  • A power supply on the instructor's bench is used to provide ±15 V to all the connected boards. Depending on availability, one dual-power supply (each side set to independent) will generally be used (Figure 1). If a dual-power supply is not available, two single-power supplies are connected in series (Figure 2).
  • Set the power supply voltage as follows:
    • Connect the black wire of the voltmeter to the green panel connector.
    • Connect the red voltmeter wire to the red panel connector, and adjust the right side power supply to +15V
    • Move the red voltmeter wire to the black panel connector and adjust the left side power supply to -15V

Figure 1: Connection of Dual Power Supply	Figure 2: Connection of Two Single-Power Supplies

• Board connection

• Make sure the nuts under the screw heads are finger tight, else voltages will fluctuate.