Sheldon SHEL LAB SVAC1, Инструкция по установке и эксплуатации

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OPERATION
H
IGH
T
EMPERATURE
L
IMIT
A
CTIVATED
The High Limit system cuts off heating in the oven whenever the chamber temperature meets or
exceeds the Limit setting. Heating remains disabled until the oven end-user clears the Limit cutoff.
Indicators
When heating is cut off, the oven display flashes an alert screen alternating with
the homepage. Additionally, an illuminated “4” on the bottom display level
specifies that the oven should be routing electricity away from the heating
elements.
Activation of the Limit cutoff is accompanied by a click sound.
Possible Causes of High Limit Activation
•
The oven temperature is set above or near the High Limit cutoff setting. The
High Limit should be set at least 10°C above the highest intended
temperature of your heating application.
•
A heat source in the oven chamber is pushing the oven temperature above
the limit setting.
•
Significant outgassing in the chamber may be interfering with the measured
temperature.
•
Attempting to heat a significant mass of product or samples may trigger a
temperature overshoot and subsequent Limit cutoff.
•
The oven temperature controller circuitry or sensor probe have failed.
If you suspect an ignition event in the oven chamber or a hardware failure wait for the oven to
cool to room temperature before opening the chamber door. Contact
33T
Technical Support
33T
for
assistance.
Clearing the High Limit Heating Cutoff
•
Clearing the cutoff restores power to the oven heating elements.
•
The oven chamber temperature must be below the High Limit cutoff setting before
clearing the cutoff.
•
Always verify it is safe to resume heating before clearing the High Limit cutoff.
1. Push the Reset button.
•
The alert screens will flash 2 additional times before the oven controller clears the
cutoff, ending it.
Alternating Screens
Attention Screen
Heating Off