EET-216 LAB # 1 - Lab Volt Measurement PDF

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Electrical Engineering Electrical Engineering Technician AMAT/ SETAS Course: EET-216 DRAWINGS & INSTALLATION 3

Lab # 1 TITLE: Lab-Volt Introduction /55 Objective: In this lab, we will introduce the Lab-Volt equipment and software which will be used to perform most of the labs in this course. Equipment:  Resistor bank  Power supply  Connection leads  Data Acquisition Interface 9063(DAI)  Computer connected to DAI

Model 9063 – Data Acquisition and Control Interface The Data Acquisition and Control Interface (DACI) performs two main functions: data acquisition feeding raw signal data to the computer-based instruments, and data acquisition for implementing a control function. Each DACI can perform these two functions at the same time. However, when a complex control function is implemented, the DACI stops data acquisition for the computer-based instruments and performs only data acquisition for the control function. The DACI has four isolated, high-level voltage inputs and four isolated, high-level current inputs. All these inputs are fitted with 4 mm banana safety jacks to make connections to electric power circuits quick, safe, and easy. The DACI also has eight low-level, analog inputs which allow measurement of other circuit parameters. Two of these inputs can be used to measure torque and speed using a dynamometer (Model 8960-1 or 8960-2).

DACI has 4 Voltmeters and 4 Current meters as you can see the above figure. All multimeters have 2 plugs (RED and BLACK). The connection of these 2 plugs are very important. It determines the polarity of the measurements.

Most of the schematics do not show the details of the connections of the meter. It is the responsibility of the technician to determine these connections.

High voltages are present in this laboratory exercise. Do not make or modify any banana jack connections with the power on unless otherwise specified.

Procedures: 1. Make sure that the AC and DC power switches on the Power Supply are set to the O (off) position,

then connect the Power Supply to the three-phase AC power outlet. Connect the Power Input of the Data Acquisition and Control Interface to a 24V AC power supply. Turn the 24V ac power supply on. 2. Connect the USB port of the Data Acquisition and Control Interface to a USB port of the host

computer. 3. Turn the host computer on, then start the LVDAC-EMS software.

In the LVDAC-EMS Start-Up window, make sure the Data Acquisition and Control Interface is detected. Select the network voltage and frequency (60Hz, 120V) then click the OK button to close the LVDAC-EMS Start-Up window. 4. Connect the equipmnet as shown in Figure 1 below. Use the Power Supply to implement the DC

power source. Use the Resistive Load to implement the three-single phase resistors

8

N

5. Make the necessary switch settings on the Resistive Load so that the resistance of the three-phase

resistor is equal to ∞ Ω (all switches in the open position). 6. In the Metering window, make the required settings in order to measure the DC Line Voltage EL

(input E1) and the DC Line current IL (input I1). 7. After instructor reviews your connections turn on the Power Supply

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Switch Statuses 8.

Calculate Resistance

Use Meter M13

Use Meter M1 Use Meter M7 Voltage (E1) Current (I1)

4-on, 5-off, 6-off 1200Ω -135.4V 4-on, 5-on, 6-off 400Ω -131.3V 4-on, 5-on, 6-on 171.4 Ω -126.3V Table 1 (below) for circuit associated with Figure 1 (above)

Power (P1)

-0.112A -0.320A -0.708V /2

15.12W 42.33W 94.97W

Co mpl ete the

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9. Turn off Power supply.

10.Re-configure equipment as shown in Figure 2 below.

***note the polarity of I1

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11 Switch Statuses

Calculate Resistance

Use Meter M13

Use Meter M1 Use Meter M7 Voltage (E1)

Current (I1)

Power (P1)

4-on, 5-off, 6-off 1200 Ω -134.4V 0.105A 4-on, 5-on, 6-off 400 Ω -130.5V 0.313A 4-on, 5-on, 6-on 171.4 Ω -126.0V 0.719A /3 instructor reviews your connections turn on the Power Supply

-14.14W -40.85W -88.96W

12.Complete the Table 2 (below) for circuit associated with Figure 2 (above)

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13.Turn off Power supply.

Compare the P1 found in tables 1 and 2. Explain the difference: bl i ii b b h d l

/2 i

h

l

Afte r

14.Connect the equipment as shown in Figure 3 below.

E1 1

I1 N

P1

15.After instructor reviews your connections turn on the Power Supply. Use the Power Supply to

implement the AC power source

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16.Complete the Table 3 (below) for circuit associated with Figure 3 (above)

Calculate

Use Meter M1 Use Meter M7

Switch Statuses 4-on, 5-off, 6-off 4-on, 5-on, 6-off 4-on, 5-on, 6-on

/2 Use Meter M13

Resistance

Voltage (E1)

Current (I1)

Power (P1)

1200 Ω 400 Ω 171.4 Ω

123.3V 123.0V 122.8V

0.100A 0.297A 0.686A

12.31W 36.57W 84.05W

17.Turn off Power supply.

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18.Connect the equipment as shown in Figure 4 below.

E1 1

I1 N

19.After instructor reviews your connections turn on the Power Supply

P1

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20.Complete the Table 4 (below) for circuit associated with Figure 4 (above)

Calculate

Use Meter M1 Use Meter M7

Switch Statuses 4-on, 5-off, 6-off 4-on, 5-on, 6-off 4-on, 5-on, 6-on

/2 Use Meter M13

Resistance

Voltage (E1)

Current (I1)

Power (P1)

1200 Ω 400 Ω 171.4 Ω

122.3V 122.3V 122.1V

0.097A 0.295A 0.683A

-11.89W -35.94W -83.54W

Compare the P1 found in tables 3 and 4. Explain the difference: /2 We have to flip the ammeter because ammeter reads the opposite current. When we multiply the positive and the negative voltage the reading of the ammeter come out as negative. Ammeter use in this equipment don’t have the polarity because of the ammeter was flipped and reading came out was negative. 21.Turn off Power supply.

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22.Connect the equipment as shown in Figure 5 below.

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N

23.After instructor reviews your connections turn on the Power Supply

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24.Complete the Table 5 (below) using the data capture method for circuit associated with Figure 5

(above)

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This table can be replaced with screenshot of the captured data. Turn on switches 1 ++ ++ ++ ++ ++ ++ ++ ++

2 3 4 5 6 7 8 9

Set up Meter to find Impedance

Use Meter M1

Use Meter M7

Use Meter M13

Resistance (R)

Voltage (E1)

Current (I1)

Power (P1)

0.103A 0.299A 0.679A 0.776A 0.971A 1.35A 1.448A 1.64A 2.038A

12.5W 36.5W 82.61W 94.3W 117.9W 163.2W 174.8W 197.9W 244.9W

1187.0 Ω 407.9 Ω 179.0 Ω 156.5 Ω 125.1 Ω 89.51 Ω 83.44 Ω 73.53 Ω 58.96 Ω

122.1V 122.1V 121.6V 121.5V 121.4V 120.8V 120.8V 120.6V 120.2V

Use the data gathered in Table 5 (above) to plot a Power Resistance Vs. index curve. Use the labvolt graphing program with your captured data. Include descriptions for your x and y axis as well as a title for your graph. (See appendix for example) /3

25.Close LDVAC-EMS, then turn off all the equipment. Disconnect all the leads and return them to their

storage locations.

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In this exercise, you learned how to set up and connect circuits using the Lab Volt equipment.

26.Repeat steps 22 to 24 using the lab volt simulator at home. Attach screenshots of your circuit, data

and graph generated using the simulator. member)

(Individual work – include screenshots for each group /9

27.Conclusion

/3

In lab 1, I learned how to use resistor bank, Data acquisition interface 9063, and computer connected to DAI some special lab equipments. Especially about the new LVDAC- EMS software. That software make many things easy and save time. As a summary we make the equipment for 5 times same as the lab sheet. After that we took the measurements and fill the tables. When we make the graph for table 5, I got an clear idea about this Lab. Grading Rubric Student Names

LAB MARK

Conclusion

SAFETY

Simulator

Total Mark

33

3

10

1 2

Appendix: Start LVDAC-EMS program. Power Supply and Data Acquisition:

ENSURE Main Power Switch on power supply is in the OFF position. Lab setup: 1. Start computer and sign in 2. Connect power to Data Acquisition Module 3. Turn 24V Power Supply ON. 4. Start LVDAC-EMS program. 5. Select 120V, 60Hz then select OK. 6. Begin Connections that are required by lab.

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Selecting Active Meters

Turn meter on and off by clicking on the meter name

Set the meter up to measure different items by selecting its display option

In the lab the meters are set default as “Continuous Refresh” on the simulator they are default set to “Single Refresh”

Using Lab-Volt tabulating features

Click here to capture data Click here to get column titles

Click here to convert data to graph

Using Lab-Volt Graphing feature

Select data to be used for the x and y axis.

Use options menu to set the graph title and name the axis.

Simulator example: (Use the link and access code listed in your course news)

Example Graph...