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14
(3) Measuring the Resistance Between Tip and Ground
Press the SELECT button to light up the mode indicator lamp of "OHM." Using the same
procedure as when measuring the difference in potential, measure the resistance after pressing
the
AUTO ZERO
button.
CAUTION
• Be sure to plug the tester power cord in a bipolar grounded outlet during voltage or resistance
measurement.
• If the measured voltage or resistance is out of the specified range, check the iron tip or mounting
screws for looseness and repeat the measurement.
n
AUTO ZERO function
• Voltage and resistance must be measured in respective modes.
• When pressing the
AUTO ZERO
button you will see a count transition of 0.0.0
→
0.0
→
0. Wait until
the display returns to normal status.
• A correction value obtained by the AUTO ZERO function is saved in nonvolatile memory and
is not lost even when the tester is shut off.
1. Insert the power cord of the soldering iron to
be tested into the receptacle on the HAKKO
FG-101.
2. Wait until the tip reaches the set temperature.
If the soldering iron is a variable tip
temperature model, set temperature to the
maximum.
3. Press the SELECT button to light up the
mode indicator lamp of "mV."
4. Press the
AUTO ZERO
button. (Refer to "AUTO
ZERO function.")
5. Clean the tip and coat it with fresh solder.
6. Place a tiny bead of solder in the center of
the conduction plate and heat the bead until
the solder has completely melted.
7. Read the value, when the displayed value
becomes stable.
— NOTE —
When using fine tips the solder may not melt
on the conduction plate. If this occurs, replace
the conduction plate with the conduction wire.
Do not use the conduction wire for larger tips.
Replacement
Remove the two screws which secure
the conduction plate. After removing the
conduction plate, secure the conduction
wire with the same secrews in place of the
conducion plate.
— NOTE —
The tester may provide a numeric value during
voltage measurement, even if the tip is not
in contact with the conduction plate. This
does not mean a failure of the tester. Also,
if a atemperature outside the measurement
range is detected, a value that is outside the
measurement range may be displayed. This
does not mean a failure of the tester.
(2) Measuring the difference in potential between tip and ground
