2.2 Key Lock Control
The key lock feature on this unit is to prevent unwanted
temperature setpoint changes. This feature is factory set to OFF.
To enter key lock mode, follow the sequence shown below.
2.3 High and Low Temperature Alarm
The temperature alarm set range is b2° and
+14°C. The factory setting is +5°C.
a. High Temperature Setpoint
For example, if the high temperature alarm setpoint
required is 3°C greater than the chamber temperature or you
wish the alarm to go off when the chamber temperature is 3°C
greater than the temperature setpoint, set the first digit (step 5)
to “3”.
Depending on the setting of the high temperature alarm set-
ting, when a large amount of product is placed into the cham-
ber, the alarm system may activate. After the chamber tempera-
ture reaches its setpoint, the alarm is automatically cancelled.
Model 3680 Series __________________________________________________________________Control Panel Procedures
2 - 2
Operation
Key
Display
Mode
1
----
Current chamber
temperature
Temperature
Display
2
Press and hold for 5 seconds
The first digit of
the temperature
display flashes
3
Set flashing digit to “1”
Increases the
value of the
flashing digit
Key Lock
LO is enabled
(key lock off)
L1 is disabled
(key lock on)
4
Press the SET key
SET
Key lock is ON
and the display
returns to the
current chamber
temperature
TEMPERATURE (°C)
TEMPERATURE (°C)
4
L 0
L 1
4
Temperature
Display
Operation
Key
Display
Mode
1
----
Current chamber
temperature
Temperature
Display
2
Press for 5 seconds
The first digit on the
temperature display
flashes
3
Set the first digit to “1”
Increases the value of
the flashing digit
4
Press the SET key
SET
The first digit of the
temperature display
flashes
Chooses the next
digit to be changed
5
Set the temperature
difference required for
alarm setpoint
Increases the value of
the flashing digit
High
Temperature
Alarm Set
6
Press the SET key
SET
The value is stored in
memory and the
display returns to the
current chamber
temperature
TEMPERATURE (°C)
TEMPERATURE (°C)
0 0 4
F 0 0
F 0 1
0 0 5
0 0 3
0 0 4
Temperature
Display
