Parr Instrument 6725 - Manual (Page 8)

6725
Semi-micro Calorimeter Instruction Manual
2-2
Figure 1
6772 Calorimetric Thermometer Back Panel
Oxygen Tank Installation
Install the oxygen tank according to the manufacturer’s recommendations. Unscrew the
protecting cap and inspect the threads on the outlet nipple to be sure they are clean and
in good condition; attach the 1824 Oxygen Filling Connection to the outlet nipple and
tighten the union nut with a wrench.
Motor Installation
Attach the motor cord to the rear of the calorimeter case using the mounting screws
provided for safety purposes. Set the cover with its attached stirring shaft onto the
stainless steel air can; drop the geared drive belt over the motor and stirrer pulleys. The
drive system should run freely. Although the belt may appear to be unusually loose, it is
intended to operate under light tension to minimize friction in the stirrer bearing. The
gearing on the belt and pulleys will prevent slippage.
Thermistor Probe Installation
Connections for two thermistor probes are located on the back of the 6772 Calorimetric
Thermometer. If only one probe is to be used, connect it to the “bucket” connection. If
the second probe is used, it should be inserted in the hole on the left, rear of the
493E Plug
with 3280HC
Retainer installed to
insulate from live
circuits when no
motor is attached.