-15-
Push the four input sockets into the PC board holes from the selector switch side until they stop (see
Figure G). Turn the board over as shown in Figure Ga and solder the sockets in place from the top legend
side. Apply enough heat to allow the solder to flow around the input sockets (see Figure Gb).
Push on the slide switch knob.
Connect the 9V battery to the meter. Turn the range
selector knob to the 20V position and connect the
test leads (red lead to V
Ω
and black to COM). Using
another meter of known accuracy, measure a DC
voltage less than 20V (such as a 9 volt battery). You
will calibrate the kit meter by measuring the same
voltage source and adjusting VR1 until the kit meter
reads the same as the accurate meter. When the
two meters agree, the voltage circuit is calibrated.
Turn the range selector knob to the off position.
Current Test
Connect the kit meter and another meter of known
accuracy in series. Set the meters in the 200
µ
A
position. Construct a circuit for a DC current (for
example 9V and a 47k
Ω
resistor for 190
µ
A) and
measure the circuit. Both meters should have close
to the same readings. If the meters do not agree,
check the parts just added. Do not readjust VR1 for
this will change the voltage reading set in step 1.
Check that 200
µ
A - 200mA scales. The 20A scale
requires a circuit of 1 - 10 amps. If the tests are not
working, check for cold solder joints and part values.
Turn the meter off and remove the battery and test
leads.
DO NOT PROCEED TO SECTION C
WITHOUT YOUR INSTRUCTOR’S APPROVAL.
Figure G
Figure Ga
Figure Gb
Top Legend Side
Top Legend Side
Solder
Socket
Sockets
Input
Sockets
Slide Switch
Slide Switch Knob
Testing Procedure
Voltage Test
Figure Gc
9V
– +
47k
Ω
-20-
Mount the two 9-pin component sockets to the PC board with the notch at the base of the socket in the
direction shown in Figure I. Solder the sockets in place from the top legend side.
PARTS LIST - SECTION F
Qty.
Description
Part #
Qty.
Description
Part #
1
Battery Cushion
620001
1
Shield Spring
680008
1
Top Case
623101A
2
Knob Spring
680009
1
Bottom Case w/Stand
623200A
1
Top Plate (B)
724000A
3
Screw M2.3 x 6
642360
1
Shield
780008
2
Screw M3 x 12
642367
1
Grease
790004
2
Bearing
666001
Note:
The shield and battery cushion may be installed already.
SECTION F
Final Assembly
Figure I
Component Socket
Component Socket
Notch
Notch
Testing Procedure
Connect the 9V battery and test leads to the meter
(red to V
Ω
and black to COM).
Set the range
selector knob to the diode scale and set SW1 in the
DC Ohm position. Connect a diode to the test leads
with the correct polarity (see figure below). The
meter will range for 100 - 950. If the tests are not
working, check for cold solder joints and part values.
Turn the meter off and remove the battery and test
leads.
DO NOT PROCEED TO SECTION E WITHOUT INSTRUCTOR’S APPROVAL.
COM
V
Ω
