Heathkit im-5210 - Page 5

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( ) Prepare the following lengths of wire:
NOTE:
In the next step, do not handle the resistor with
3" small black
3" red
3-1/2" small black
48" large black
your bare hands. Finger prints can
enough
to cause inaccurate readings.
between your hands and the resistor.
change the resistance
Use a
soft dry cloth
( ) Tie an overhand knot in the long black wire 4-1/2"
from one end. Position the knot around the boss.
( ) Insert
one end of the 3" small black wire and one end
of the 3" red wire into the open tabs of a spade lug_
Then bend the tabs over both wire ends and solder the
connection. The free ends of the two wires will be
connected later.
( ) Similarly,
connect the end of the 48" large black wire
with
the knot and one end of the 3-1/2" small black
wire
to the other spade lug.
( ) Remove
and discard the shorting wire from between
the meter terminals.
NOTE: When you
connect a spade lug to the meter
terminals in the following steps, loosen the terminal screw,
slide
the spade lug onto the screw under the washer, position
the lugs so that the wires are toward the switch, and then
retighten the screw.
( )
Connect the spade lug, with red wire, to the positive
(+) terminal of the meter.
( )
Remove and discard the screw and lockwasher, if any,
from each end of the 800 1It1.Q resistor.
Place a
#6 lockwasher onto the threaded end of the
hex stud and thread the 800 M.Q resistor onto the hex
stud.
( ) Place a #6 lock washer onto the threaded end of the
probe tip. Then thread the tip onto the free end of the
800 M.Q resistor.
SI ide the handle tip over the probe tip and resistor.
Secure it to the handle top and bottom with two #2 x
1/4" self-tapping screws.
Install a
rubber insulator and alligator clip on the free
end of the long black wire. Be sure the insulator is
positioned as shown; then solder the connection .
Carefully peel
away the paper backing from the switch
label.
Then press the label onto the handle top, over
the switch. Position the label so that the word "ON" is
toward the meter.
NOTE: The blue and white label that you will install in the
( ) Connect the other spade lug, with the two black wires,
following
step shows the Model number and Series number
to the negative (-) terminal of the meter.
of your kit. Refer to these numbers in any communications
you have with the Heath Company about this kit.
( )
Connect and solder the free end of the red wire to lug
2
of the switch.
Carefully peel
away the paper backing from the blue
( )
Connect and solder the free end of the small black
and white label. Then press the label onto the first
wire
coming from the negative (-) terminal of the
page
of these instructions.
meter, to lug 1 of the switch.
( ) Carefully peel the paper backing from the Heathkit
( ) Remove an additional 1/4" of insulation from the free
nameplate label and press it onto the handle bottom,
end of the other small black wire.
beh ind
the meter.
( ) Wrap
the end of the small black wire around the
Make sure that the mechanical zero position of the meter
indicated portion of the hex stud and solder the
pointer is correct . If not, adjust it as follows:
connection.
( ) Place the instrument in the normal operating position.
( ) Let
the solder connection cool. Then place the
Turn the plastic screw on the meter face with a
hex-shaped
portion of the hex stud into the end of the
screwdriver while
gently tapping the meter face with
handle top as shown.
one finger until the pointer lines up with the zero line
on the left side of the scale_
( )
Mount the handle bottom with two #6 x 5/8"
self-tapping screws. Be sure the long black wire
extends from the hole in the end of the handle.
This
completes the assembly of your 40 kV Probe Meter.
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