Load Sensing Function; Additional Load Sensing Feature; Beeper Preference; Calibration Procedure - VWR Standard Series Instruction Manual

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Perating nstrUctions cont
5. Turning unit off:
a. To turn the unit off, press the standby button. The speed and time displays will
be blank, the standby indicator light will illuminate. The Orbital Shaker should
be kept in standby mode when not in use. To completely cut off power to the
unit, disconnect the power cord from the unit or unplug from the wall outlet.
OPERATING TIPS
Centering your sample and even weight distribution on the tray helps with balance
and stability. As a safety feature, a built-in program will shut power off to the motor if
the tray is prevented from rotating, or the unit is overloaded beyond its recommended
weight capacity. The shaker will automatically restart after a power interruption. Built-in
memory maintains the last used speed and time settings during a power interruption.
LOAD SENSING FUNCTION (Advanced Orbital Shakers Model 3500 and up)
The Advanced Orbital Shaker is equipped with a load sensing function that can be
activated by the user. This function provides protection against improper positioning
of load and maximum load being exceeded. When activated, the unit will automati-
cally sense improper load conditions and slow to a safe running speed, then display
that speed followed by E04 on the speed display. The unit will also beep three (3)
times every 60 seconds until the error is reset by pressing the speed on/off button. To
activate the load sensing function use the following steps:
1. Place the unit in standby mode.
2. Press and hold the speed on/off button and press the standby button. The unit will
beep two (2) times, confirming the function is enabled.
3. To restore normal operation, remove AC power to the unit for ten (10) seconds
and then restore. If the E04 error occurs be sure the load is within the maximum
specification and properly balanced (centered on tray) and/or reduce sample size/
speed before restarting the unit. If the E04 occurs due to acceptable sample vibra-
tion or another vibration source, the vibration sensing function can be disabled as
described above.
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ADDITIONAL LOAD SENSING FEATURE

The Advanced Orbital Shaker Models 3750 and up, are equipped with an additional
overload protection feature that lets the user know when the unit's set speed is higher
than the achievable speed of the unit. The unit speed display will show an E7. The
unit will also beep three (3) times every 60 seconds until the error is reset by pressing
the speed on/off button.
To disable this feature perform the following steps:
1. Place the unit in standby mode by pressing the standby button.
2. Press and hold the speed up button and press on/off button. The unit will beep two
(2) times, confirming the function is disabled.
3. To restore unit to normal operation, remove AC power to unit (unplug power cord
from wall outlet) for ten (10) seconds and restart.

BEEPER PREFERENCE

To silence beeper operation (except for error codes), with the unit in standby mode,
press and hold the time on/off button and press the standby button. To restore normal
beeper operation, remove AC power to unit for ten (10) seconds and then restore.

CALIBRATION PROCEDURE

(Advanced Orbital Shakers Model 3500 and up)
This procedure is used to self calibrate the Advanced Orbital Shaker. The tray should
be free of any samples, vessels, and accessories prior to calibrating.
1. Turn unit on. Speed and time displays will be illuminated.
2. Press and hold the standby button and momentarily press the speed on/off button.
The speed display should read "CAL".
3. The unit will run for approximately one (1) minute and automatically calibrate.
RS-232 SERIAL PORT (Advanced Orbital Shakers Model 3500 and up)
RS-232 serial port provides two-way communications for data logging and unit control.
If you need additional details, please contact Troemner for technical support at:
tech_support@troemner.com.