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6.5 Audible Alarm Functions
The shaker has an audible alarm that is activated at the end of a timed run, or if the
temperature is 1ºC or more from the setpoint, or if the speed is 5 RPM or more from the
setpoint. It may be deactivated in the following way:
1. Press the
SELECT KEY
until the
HRS INDICATOR
is illuminated.
2. Simultaneously press the
V
and
W
KEYS
. The
SET
and
MAINT
INDICATORS
will
flash.
3. While the
SET
and
MAINT
INDICATORS
are flashing, press the
START/STOP KEY
.
The
MUTE INDICATOR
will light to advise that the audible alarm has been
deactivated.
To reactivate the alarm
, repeat steps 1-3. The
MUTE INDICATOR
will be extinguished
when the alarm has been reactivated.
6.6 Temperature Offset Calibration
The temperature probe and the temperature controller are calibrated together at the
factory. The temperature probe measures the temperature of the air at the probe’s
location, near the heat exchanger return vent. The controller uses the probe input to
adjust air temperature, up or down, to match the temperature setpoint.
Depending on various conditions within the chamber, such as flask placement and size,
the heat produced by growing organisms, heat losses due to liquid evaporation from
flasks, etc., the display temperature may differ from temperatures within the flasks
themselves.
If you wish to have the temperature display (“Indicated Temperature”) match the
temperature at a given point, or match the average of a series of points within the
chamber (“Actual Temperature”), proceed as follows:
1. Let the unit equilibrate at or near the desired temperature. Record the Indicated
Temperature.
2. Record the Actual Temperature.
3. Calculate the temperature correction value: Actual Temperature – Indicated
Temperature = Temperature Correction Value.
4. Press
the
SELECT KEY
until the function
°
C INDICATOR
illuminates.
5. Simultaneously press the
V
and
W
KEYS
. The
SET
and
MAINT
INDICATORS
will
light.
6. While
the
SET
and
MAINT
INDICATORS
are illuminated, use the
V
or
W
KEY
to set
the display to the calculated Temperature Correction Value.
New Brunswick Scientific Co., Inc.
User’s Guide
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
