a. Rated Speed. The rated speed for Model 0103 (120 volts [v]) and Model 0106
(220v) is continuously adjustable from minimum speed. For maximum speeds, see figure
1-2 for speeds of fourteen different rotor/shield configurations.
b. Electrical Specifications.
(1) Model 0103: 120 volts alternating current (vac), 60 Hertz (Hz), 2.5
amperes (amps) and Model 0106: 220vac, 50Hz, 1.3amps UL approved.
(2) Tachometer Range: 0 to 4,000 rpm and accuracy: +5 percent over 500
rpm to 4,000 rpm.
a. Required Tools. To perform a speed check, an external tachometer, such as
the Model 5205 ADAMS Photo Electric Tachometer, is recommended. Avoid mechanical-
type tachometers that contact the rotor.
b. Speed Checks. The Dynac II Centrifuge is a variable speed machine.
Maximum speeds that should be obtained with each rotor configuration are listed in Figure
1-2. These speeds can be used to check for proper operation of the centrifuge motor and
(1) Check motor operation. Install a complete rotor and shield assembly.
With the centrifuge operating at the maximum speed setting, the external tachometer
reading should be within +10 percent of the maximum speed listed in figure 1-2 for the
rotor/shield configuration in use.
(2) Determine if supply voltage and frequency are correct. Such deviations
will affect maximum obtainable operating speed. If supply voltage and frequency are
tolerance, you must correct the problem. If you cannot correct the problem, contact your
nearest Clay Adams equipment dealer for service or call Clay Adams Technical Service
(3) Check accuracy of the centrifuge tachometer. Use the external
tachometer reading obtained above and operate the centrifuge at the maximum speed
setting with the same rotor and shield assembly. The centrifuge tachometer reading
should be within +5 percent of the rpm reading obtained with the external tachometer.
Troubleshooting an incorrect rpm reading is covered in Lesson 2, Isolate Malfunctions and
Remove and Replace Defective Modules.