18
KEY LOCK FUNCTION
This unit is provided with the key lock function. When the key lock is ON, change of temperature setting
through the key pad is not possible. The key lock is set to OFF at the factory.
Display
Mode
Function
L 0
Key lock is OFF
Enable to change temperature setting
L 1
Key lock is ON
Disable to change temperature setting
Table 2. Procedure for key lock setting (change from key lock OFF to key lock ON)
Description of operation
Key operated
Indication after operation
1
―
―
The current chamber temperature is
displayed.
2 Press digit shift key for 5 seconds.
The display changes to L 0 and the
first digit blinks.
3
Press numerical value shift key
and scroll the figure to 1.
When pressed, the figure of settable
digit changes.
4 Press set key.
SET
The key lock is set to ON.
The current chamber temperature is
displayed.
• The setting mode returns to the temperature display mode automatically when 90 seconds has passed
without any key operation. In this case, any setting before pressing set key (SET) is not memorized.
ALARM TEMPERATURE SETTING
This unit is provided with both high and low temperature alarms. The temperature at which the alarm is
activated can be changed.
The high temperature alarm can be set to a temperature of + 5 °C to + 15 °C.
The low temperature alarm can be set to a temperature between -15 °C and -5 °C.
Note:
The temperature alarm is set at ±10
o
C of the set temperature at the factory.
Display
Mode
Function
F01
High temperature alarm set for top
See Table 3 on page 19
F02
Low temperature alarm set for top
See Table 4 on page 19
F03
High temperature alarm set for bottom
See Table 5 on page 20
F04
Low temperature alarm set for bottom
See Table 6 on page 20
As an example, Table 3 and Table 4 shows the procedure to set the high temperature alarm so that the
alarm can activate when the chamber temperature is 5
o
C higher than the set temperature.
Table 5 and Table 6 shows the procedure to set the low temperature alarm so that the alarm can activate
when the chamber temperature is 5
o
C lower than the set temperature.
Summary of Contents for MDF-MU539D
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