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3
Section 3 - Parts and Features
The BB-2A Hot plate is a general purpose temperature reference source
intended for laboratory use with an operating temperature range from
66°C to 343°C (150°F to 650°F). The front target plate is heated by a
resistance heater, embedded in the refractory material of the bottom
plate. The plates are made of aluminum to aid in uniform surface tem-
perature distribution. The temperature of the plate is controlled by a
bimetallic thermostat sensor. The case supports the aluminum plates,
and also serves to house the electrical connections and the temperature
control components. See Figure 1 for the overall shape and the general
features of the unit.
POWER "ON/OFF"
POWER CORD
Parts and Features
TEMPERATURE
CONTROL KNOB
FUSE HOLDER
SWITCH
Figure 1. Blackbody Source Parts
POWER "ON"
INDICATOR
DIAL TEMP
THERMOMETER
TARGET PLATE
3-1
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