9
SAFETY THERMOSTAT:
This hydraulic thermostat is a secondary back-up system to protect
specimens from excessive heating in the unlikely event of microprocessor
failure.
It should be set slightly higher than the setpoint temperature. If the
temperature should ever reach the se2ºC, a microprocessor safety will open a
relay link to the heaters and shut them off, the hi-limit legend is displayed and beeper
alarm sounds.
The hi-limit thermostat can be accessed in the lower right hand corner at
bottom front of the unit. Pry off small plastic button to gain access. Use a small
blade screwdriver to make the necessary adjustments.
BACK SIDE:
CIRCUIT BREAKERS: Independent pushbutton, reset circuit breakers for line
power and shaker motor are next to the power connector. If overloaded, the
button pops out. To re-set, push the button in until it clicks in place.
PHONE JACK FOR OPTIONAL RECORDER: A permanent record of chamber
temperature may be obtained by connecting a strip-chart recorder or other
recording device to the buffered analog output signal. The signal, based on the
LED display, is 10 mV per degree-C. A ¼-inch phone jack is on the back of the
unit for this purpose.
UNDER THE LID:
INTERLOCK SAFETY SWITCH: When the lid is raised, shaking and blower
stop. When closed, the shaker resumes operation. The timing cycle continues
to count
down with the lid raised or closed.
SECTION 6
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