Operating Tips - VWR 444-7084 Manual De Instrucciones

6. Turning unit off:
a. To turn the unit off, press the standby button. The temperature,
speed and time displays will be blank, the standby indicator light
will illuminate. The Incubating 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

Opening the lid on the Incubating Orbital Shaker will cause the unit to
pause shaking and/or heating. Close the lid and the unit will resume
shaking and/or heating at current settings.
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 temperature, speed and time settings
during a power interruption.
LOAD SENSING FUNCTION
The Incubating 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 automatically sense improper load conditions
and slow to a safe running speed, then display that speed followed by
an E04 error message 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
7
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 error occurs due to
acceptable sample vibration or another vibration source, the vibration
sensing function can be disabled as described above.
BEEPER PREFERENCE (muting audible alarm)
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. Release the standby button first, and then release the
on/off button. To restore normal beeper operation, remove AC power to
unit for ten (10) seconds and then restore.
SINGLE POINT CALIBRATION PROCEDURE
This procedure is used to fine tune and calibrate the Incubating Orbital
Shaker at a specific temperature setting. This process may be repeated
for up to three (3) separate set-points. If a fourth calibration set-point
is entered, the first set-point entered will be overwritten.
1. Turn unit on.
2. Set desired temperature.
3. Stabilize one (1) hour or more, measuring the temperature with a
temperature probe/thermometer.