8. PARAMETER SETTINGS
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Entering the parameters
The Hakko 941 has the following three parameters:
1) °C or °F temperature display selection
2) Auto power shutoff
3) Low-temperature alarm tolerance setting
4) Resetting the supervisor/operator control setting
Once the station enters parameter mode, set the
parameters in the order shown below. After all the
parameters have been set, normal operation will
be resumed.
(1) °C or °F temperature display
1. Turn power OFF.
2. Insert the control card into the card slot in the
front of the unit.
3. Press and hold down the
and
buttons
simultaneously, and then turn power ON.
4. Hold
and
buttons down until the display
shows
(Celsius) or
(Fahrenheit).
When either the display shows either
or
, the station is in parameter input mode.
• Pressing either the
and
button will
cause the display to alternate between
or
.
• When the desired scale is displayed, select
by pressing the
button. The system will
automatically sequence to auto power shutoff
mode.
(2) Auto power shutoff
This is an optional setting. When it is
activated and the soldering iron is not used
for 30 minutes, the power to the heating
element is shutoff automatically and the
buzzer will sound three times. When the
temperature decreases to 100°C./200°F. the
display will show
. To begin soldering,
cycle the power switch OFF, then ON. The
power will be turned on if you hit any button
before the temperature decreases to 100°C./
200°F.
To bypass this procedure and continue to
resetting the low temperature alarm tolerance
setting press the
button once.
To change the auto power shutoff setting, the
procedure is as follows.
• The display will show
or
when this
mode is entered.
• Using
or
button will change
and
.
The auto power shutoff is operational only when
is selected.
• Press the
button to enter the parameter. This
will store the auto power shutoff setting in
system memory. The system will automatically
sequence to the low temperature alarm
tolerance setting.
10
CAUTION:
It is possible that the auto power shutoff function could be
activated, shutting off the heating element even though
soldering is being done, if the thermal load is very small.
Should this occur, follow the instructions above to disable
the auto power shutoff parameter.
