III. Operation
The Certus controller has a single control
switch with 5 positions, off and 0, 33, 45
and 78 RPM.
Power on the controller by rotation the
switch from off to the 0 RPM position.
When the controller is first powered up it
goes through a 5 second sequence that
aligns the motor magnets. The red and
yellow LEDs light during this process and
the platter movement will be erratic.
To start the turntable simply rotate the
switch to the desired speed. The red LED
will light during the spin up process. The
green LED lights when the desired speed
has been reached but the speed is not
fully stabilized until the red LED shuts off.
To stop rotate the switch to the 0 RPM
position. It's best to not power down the
controller until the listening session is
over. Do not spin the platter by hand.
The Certus controller has a sleep timer
feature that will shut off the controller
after 42 minutes of uninterrupted play.
The yellow LED flashes to provide a two
minute shutoff warning. When the sleep
timer expires the motor will shut off and
the yellow LED will flash slowly. Reset
the sleep timer by turning the controller
switch to the off position. The sleep timer
may be disabled if desired.
IV. Reflex Clamp
A reflex clamp is provided with the model
460 and it's use is optional. Unlike other
Teres models clamping may or may not
produce the best results. To use the reflex
clamp place the black Delrin washer
packaged with the record clamp over the
record centering pin. The Delrin washer
must be placed directly on the platter and
under the record. Place the record over
the spindle and then thread on the clamp.
Be sure to remove the Delrin washer if
the clamp is not used.
Only a small amount of clamping pressure
is needed. A simple method for finding the
ideal pressure is to tap on the edge of the
record while clamping. Taping the edge of
the record will make a slight clicking
sound as the record edge contacts the
platter. Tighten the clamp to the point
where the edge of the record has the best
contact as indicated be the least amount
of “clicking”. The pressure is not critical
and after a little use the process will
become automatic.
V. Controller Options
The Certus motor controller has a small
number of options that may be adjusted
via internal switches mounted on the front
PCB. The top cover must be removed for
access to the switches.
S2 (8 position rotary switch)
S2 may be used to fine tune motor torque
for desired sound quality. The default
setting has been carefully optimized and
will likely be the preference for most
listeners.
S2
Torque Percent @ 33-1/3 RPM
0
58.6%
1
63.5%
2
68.4%
3
73.2%
4
78.1% (default)
5
83.0%
6
87.9%
7
92.8%
S1 (8 position DIP switch)
Sw1-5: Pitch adjust
Sw6-7: Must be off
Sw8: Sleep timer, on = enabled
Pitch Adjust Settings
Sw1 Sw2 Sw3 Sw4 Sw5
Pitch @
33-1/3
Off
Off
Off
Off
Off
-4.880%
On
Off
Off
Off
Off
-4.570%
Off
On
Off
Off
Off
-4.258%
On
On
Off
Off
Off
-3.945%
Off
Off
On
Off
Off
-3.629%
On
Off
On
Off
Off
-3.311%
Off
On
On
Off
Off
-2.990%
On
On
On
Off
Off
-2.668%
Off
Off
Off
On
Off
-2.344%
