American Hakko Products, Inc.
2.
Select the mV measuring mode on the HAKKO FG-101.
3.
Hold the AUTO ZERO button for at least 3 seconds until the LCD display shows 0, ‘mV’, and ‘
Ω
’,
then release the button.
4.
Press the AUTO ZERO button again and the LCD display will show ‘AC’, 0.0, and ‘mV’.
5.
Open the HAKKO FG-101 by removing the 5 Phillips screws along the front and back of the
casing.
6.
Carefully separate the two halves of the unit, tipping the top half of the unit towards you and
resting it upside down, revealing the PCB.
7.
Connect the Fluke 87 Digital Multimeter or equivalent device to the PCB where the red test lead
is connected to TP1 on the PCB, and the black test lead is connected to TP2 on the PCB.
8.
Set the Fluke 87 Digital Multimeter or equivalent device to measure DC voltage.
9.
Connect the Yokogawa CA-71 Portable Calibrator or equivalent device to the PCB where the
black source lead is connected to the grounding terminal of the HAKKO FG-101, and the red
source lead is connected to the screw used to secure the test plate of the HAKKO FG-101. The
two screws that secure the test plate are visible underneath the PCB through a hole and notch
that are in the PCB by design. It is recommended that you make the connection of the red
source lead to screw that is on the right-hand side from your view, and is exposed by the notch
designed into the PCB.
10.
Set the switch on the PCB (SW 1) to the TEST position.
11.
Set the Yokogawa CA-71 Portable Calibrator or equivalent device for source operation and to
output a millivolt signal.
12.
Set the output value on the Yokogawa CA-71 Portable Calibrator or equivalent device to 0 mV
and start the source supply.
13.
Adjust VR1 on the PCB so that the display on the Fluke 87 Digital Multimeter or equivalent
device is showing a value between -0.2 and 0.2 mV.
14.
Stop the source supply on the Yokogawa CA-71 Portable Calibrator or equivalent device.
15.
Set the switch on the PCB (SW 1) to the WHITE (X) position.
