28920 Avenue Williams • Valencia • California 91355
Tel 661.294.0090 • Fax 661.294.0096 • www.HakkoUSA.com
American Hakko Products, Inc.
HAKKO FG-100 Calibration Instructions
Revision 2013-12
Tools Required:
•Room Temperature Thermometer
•Yokogawa CA-71 Portable Calibrator or equivalent
•Phillips head screwdriver
Temperature Measurement Calibration
Be sure to attach the thermometer reference junction temperature detection sensor (For
Yokogawa the part number is RJ Sensor B9638CR) and place it near the HAKKO FG-100 being
calibrated. Failing to do so will result in a faulty calibration.
Be sure to allow the calibration tools and the HAKKO FG-100 being calibrated to acclimate to their
environment for 30 to 40 minutes. The ideal environment for performing the calibration will be a
room temperature of 23°C ±3°C and a relative humidity between 20% and 80%. The conditions in the
room should be stable, specifically the temperature no fluctuating more than ±1°C during the
calibration process.
1. Set the Yokogawa CA-71 Portable Calibrator or equivalent device for source operation and to
output a Type-K Thermocouple signal.
2. Turn on the HAKKO FG-100.
3. Remove the sensor wire from the HAKKO FG-100.
4. Open the HAKKO FG-100 by removing the 2 Phillips screws along the bottom back of the casing.
5. Carefully separate the two halves of the unit revealing the PCB.
6. Press the CAL button (SW 2) located to the lower right of center of the PCB from your view.
7. Carefully re-assemble the two halves of the unit and position the unit to give you a clear view of
the LCD display.
8. Verify that the LCD display shows ‘CAL’, 500, and °C. If the HAKKO FG-100 is one that displays in
Fahrenheit, the LCD display will show ‘CAL’, 932, and °F.
9. Attach the source leads from the Yokogawa CA-71 Portable Calibrator or equivalent device to
the corresponding terminal posts on the HAKKO FG-100.
