7. ENTERING TIP OFFSET VALUES
Soldering tips have different thermal characteristics, depending upon their mass, shape, and surface
area. It is obvious that the tip temperature at idle will not be the same for a fine tip as it will be for a
heavy chisel tip, although the set temperature may be the same for each tip. The difference between
the set temperature and the temperature measured at the tip is called ‘Tip Temperature Offset’. Each
Hakko 941 tip style has a specified offset value, which may be entered into the station to either add to
or subtract from the set value, thus producing the desired tip temperature. Please refer to the tip styles
and offset values on the separate sheet.
The Hakko 941 has the ability to electronically compensate for the variations due to tip temperature
offset. When a soldering tip is changed, the proper offset temperature value should be programmed
into the 941.
There are two methods for programming this function:
Method 1: Using the manufacturer’s predetermined offset value.
Method 2: Using a tip temperature thermometer to measure the actual tip temperature.
8
1. Insert the control card into the slot in the
station.
• The station will default to the temperature
setting mode. Set the temperature at
400°C. (750°F.).
2. Press the
button on the front panel
and hold for one second.
• The station will sequence to the tip temper-
ature offset data entry mode, and the
hundreds
digit will blink 0 or –.
3. Entering the
hundreds
digit
• Refer to the Tip Styles and Offset Values
on the separate sheet. The offset value is
indicated below the tip part number.
Record this value for reference.
• Press the
or
buttons to select
either positive (0 is displayed) or negative
(– is displayed) sign for the offset to be
entered.
• Press the
button. The
tens
digit will
flash, indicating that the value can be
changed (data may be entered).
4. Entering the
tens
digit
• Press the
or
button to enter the
tens
place digit of the offset value being
entered. If the value displayed is correct,
go to the next step.
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Method 1. How to enter the tip offset value into the Hakko 941
(Example)
When the offset value is –10°C.
Press the button for at least one second.
Insert the card and
set the temperature at 400
˚
C.
Press the or button.
Press the or button.
Press the button once.
