(3) Resetting the low temperature
alarm tolerance setting
This unique function alerts the operator when
the sensed temperature falls below a set limit. If
the sensed temperature drops below the alarm
level, an error message
will be displayed,
and the buzzer will sound. When the temper-
ature returns within the allowable range, the
buzzer will stop. The value is stored in the Hakko
941 as described in the example below:
To bypass this procedure, press the
button
three times.
EXAMPLE:
If the set temperature is 350°C. and the low temperature
alarm is 100°C., the alarm will trip when the sensed
temperature drops below 250°C.
NOTE:
The threshold limits are: 30°– 150°C.; 50°– 300°F.
If a value exceeding these limits should be entered, the
system will revert to the beginning of the mode (the
hundreds digit will flash) and the procedure must be
begun anew.
Range of allowable low-temperature alarm
tolerance
For °C: 30° – 150°C
For °F: 50° – 300°F
• When the station enters low-temperature
alarm tolerance setting mode, the hundreds
digit begun flashing. Enter and store the value
in the same manner as described in “Changing
the temperature setting.”
• If you enter a value exceeding the allowable
range shown to the left, you will be brought
back to entering a value in the hundreds digit.
If this occurs, re-enter a correct value.
• Once the value is stored, the system will
automatically sequence to the resetting the
supervisor/operator control setting.
11
(4) Resetting the supervisor/
operator control setting
To change the supervisor/operator control
settings, the procedure is as follows.
• The display will show
or
when this
mode is entered.
: No offset value can be entered without
inserting the card.
: An offset value can be entered without
inserting the card.
Pressing the
or
button will change
and
.
When the desired setting is displayed, select by
pressing
button.
The system will exit the parameter setting mode
and begin heater control.
It is now ready for normal operation.