(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 942 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.
(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 o
f
fset
value can be entered without
inserting the card.
: An o
ff
set
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.
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