Instruction manual
7 
CONTROL PANEL OVERVIEW 
4.1  Power Switch: The main power I/O (on/off) switch controls all power to 
the unit and must be in the I/ON position before any systems are 
operational. 
4.2  High Limit Safety Thermostat: The High Limit Safety is an independent 
temperature control that must be adjusted by a flat-head screw driver. It 
prevents temperature runaway in the event that the Main Temperature 
controller fails. If the chamber temperature rises above the Main 
Temperature set point, the High Limit maintains temperature at its own set 
point, preventing sample loss or unit degradation. Please note that it is 
not recommended that the unit be allowed to operate using only the High 
Limit to control temperature as temperature uniformity will suffer. 
4.3  High Limit Activated: This pilot light is on when the High limit has been 
activated and has taken control of the heating element. Under normal 
operating conditions this pilot lamp should never be on. 
4.4  Main Temperature Controller: This is a microprocessor based 
Temperature/Time Control Which has ramp and soak capabilities (Jumo). 
4.5  Power Exhaust Outlet: The Power Exhaust outlet is controlled by the 
Main Temperature Controller. It is located at the back of the unit next to 
the power cord. 
Figure 1 
Section 
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