ENGINEERING-43
Series-Parallel Circuits
Lab-05
Lab Data Sheet – ENGR-43 Lab-04
Lab Logistics
Experimenter:
Recorder:
Date:
Equipment Used (maker, model, and serial no. if available)
Directions
1. Note that in this and ALL OTHER Laboratory Exercises ENGINEERING UNITS must
accompany ALL Data-Entries and Calculated-Quantities
2. Check out a DMM and Red/Black measurement Leads.
3. Go to the side counter, collect resistors, “bread board”, and leads required to construct the
circuit shown in Figure 1.
4. Make the DMM-Measurements and Calculations needed to complete Table I Thru Table V
 CAREFULLY Select the DMM range such that meter displays at least THREE (3) digits.
All DMM measurements should be reported to MAXIMUM-POSSIBLE Number of
significant figures.
5. Return all lab hardware to the “as-found” condition
© Bruce Mayer, PE • Chabot College • 282219679 • Page 1
NOTE
The Ammeter MUST be connected in series with NO potential across it; i.e.,
do NOT connect the ammeter ACROSS Vs or any R.
Figure 1 • Series-Parallel Circuit. Vs = 10.00 Vdc. R1 = 1.7-2.8 kΩ. R2 = 2.94.8kΩ. R3 = 0.6-1.6 kΩ.
Table I – Component Values for Figure 1 as Measured by the DMM


COLOR-CODED Resistor Values & Tolerances
R1 =
R2 =
R3 =
Actual (DMM) Values
Vs =
R1 =
R2 =
R3 =
© Bruce Mayer, PE • Chabot College • 282219679 • Page 2
Table II – Currents and Potentials
Value Determination
VR1
VR2
VR3
I1
I2
I3
Calculated
DMM Measured
%
Notes
 Calculate V & I using the VS & R Component-Values from Table I
 %V = 100x(Vcalc – Vmeas)/Vmeas
 %I = 100x(Icalc – Imeas)/Imeas
Table III – DMM & V/I Resistance Values
Value Determination
RT
R1
R2
R3
DMM Measured
Calc by V/I
%
Notes
 The DMM Measured values for R, R2, and R3 may be taken from Table I; RT must be DMMMeasured separately.
 Calculate the V/I R-values using V & I from Table II
 % = 100x(Rcalc – Rmeas)/Rmeas
© Bruce Mayer, PE • Chabot College • 282219679 • Page 3
Figure 2 • Series-Parallel Circuit.
- Vs = 10.00 Vdc.
- R1 = 0.8-4 kΩ = R2 = 0.8-4kΩ = R3 = 0.8-4 kΩ. R4 = 1.2-9 kΩ.
- R1, R2, R3 to have the SAME nominal (color-coded) value.
- The R1,2,3:R4 Resistance RATIO to be in the range of 1.5-6
Table IV – Component Values for Figure 2 as Measured by the DMM
 COLOR-CODED Resistor Values & Tolerances
R1 =
R2 =
R3 =
R4 =
 Actual (DMM) Values
Vs =
R1 =
R2 =
R3 =
R4 =
.
© Bruce Mayer, PE • Chabot College • 282219679 • Page 4
Table V – Full Circuit Characterization
Value Determination
RT (note1)
RT (note2)
VR1
VR2
VR3
VR4
I1
I23
I4
Calculated
Measured
%



Note1: Calculate by Series-Parallel combination using the Actual Values for resistors R1-R4 as determined by OhmMeter
measurement
Note2: Calculate using appropriate I & V measurements
% calculation
 % = 100x(Valuecalc – Valuemeas)/Valuemeas
Run Notes/Comments
Print Date/Time = 29-May-16/03:59
© Bruce Mayer, PE • Chabot College • 282219679 • Page 5