VWR 3500 Standard Bedienungsanleitung Seite 12

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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 Shaker Models 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.
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RS-232 SERIAL PORT (Advanced Orbital Shaker Models 3500 and up)
RS-232 serial port provides two-way communications for data logging and unit
control. If you need additional details, please
Service Department.
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 recom-
mended weight capacity. The shaker will automatically restart after a power inter-
ruption. Built-in memory maintains the last used speed and time settings during a
power interruption.
EN
contact your local VWR After Sales