WHEATON® Standard Roller Apparatus
17
DWK Life Sciences | 856.825.1100 |
www.dwk.com
| P/N 50099786 Rev. 11/2021
which was supplied from the factory, the motor gear ratio should be checked and or changed. The
motor gear ratio is found on the builder’s plate of the motor.
Proper motor gear ratio is critical to accurate bottle speed indication. Selecting this icon brings the
user to a data entry field that displays the current gear ratio. The user can only change the number
left of the colon.
Press the
Select
button until the gear ratio message (GEr) appears, and then press
Enter
. Use the
Up
and
Down
buttons to set the motor gear ratio. The default gear ratio setting is 60.
NOTE:
This value is pre-set at the factory and should
NOT
be changed without consulting DWK Life
Sciences Technical Service if the proper value is unknown.
Ramp Up Time
The motor’s
Ramp Up Time
is the time it takes, in seconds, for the motor to reach a set bottle speed
during start-up or when any speed change occurs. This is convenient to minimize cell damage when
a unit is starting.
Press the
Select
button until the ramp up time message (rUt) appears, and then press
Enter
. Use the
Up
and
Down
buttons to change the time. This parameter has a range of 0 seconds to 60 seconds and
is stepped in 1 second intervals.
The default value is 5.0.
Bottle Speed Tolerance
The
Bottle Speed Tolerance
is +/- speed beyond the set point that a unit will generate a speed
deviation alarm. If set to 0.10, the bottle speed must be held to +/- 0.10 of the set bottle speed or an
alarm will be generated.
Press the
Select
button until the
Speed Tolerance
message (tOL) appears, and then press
Enter
. Use
the
Up
and
Down
buttons to change the time. This parameter has a range of 0.01 -1.00 rpm and is
stepped in 0.01 rpm increments. The recommended minimum speed tolerance is +/-.05 RPM.
Rotation Alarm
This parameter determines if the optional rotational alarm is activated or off. If a rotation alarm
sensor senses non-rotation within two expected roller revolutions, an alarm will activate.
Press the
Select
button until the
Rotation Alarm
message (rAO) appears, and then press
Enter
. Use
the
Up
and
Down
buttons to turn the rotation alarm either
ON
(1.0) or
OFF
(0.0).
Battery Backup Alarm
This parameter determines if the optional battery backup/alarm is activated or off. If equipped with
battery backup, an alarm will activate if the battery voltage falls below 21.7 volts.
Press the
Select
button until the
Rotation Alarm
message (bAO) appears, and then press
Enter
. Use
the
Up
and
Down
buttons to turn the battery alarm either
ON
(1.0) or
OFF
(0.0).
NOTE:
If either the Rotation Alarm option or the Battery Backup system option is not installed, set
their respective alarms to 0.0 to avoid false alarming.
