Temperature Controller-Setting Temperature; Temperature Calibration - Barnstead International MaxQ 4000 Manual

O
PERATION
Figure 3: Temperature Controller
18

Temperature Controller-Setting Temperature

Please refer to Figure 3 for control panel reference.
1. CONTROLLER SELF-TEST: When the shaker is
powered up, the controller will display 8888 along
with the three decimal points and the HEAT ON
indicator lamp. The display will then blank out for 2
seconds before showing the chamber temperature.
2. HEAT ON INDICATOR: The HEAT ON indicator
lamp is lit when the chamber heaters are receiving
power. The lamp will normally flash when the
chamber temperature is at set point.
3. SET POINT ADJUSTMENTS: The temperature con-
troller normally displays the chamber temperature.
To view or change the temperature set point pro-
ceed as follows:
Press
✳
✳
✳
A. Press and hold the "star" (✳) key and use either
the up or down arrow key to adjust the set point to
the desired temperature. Release the "star" (✳)
key.
B. Allow sufficient time for chamber temperature to
stabilize.

Temperature Calibration

1. Fill a 250-ml Erlenmeyer flask with approximately
100 ml of water and position it at the approximate
geometric center of the shaking platform.
2. Install a thermocouple inside the flask with the ther-
mocouple junction in direct contact with the water.
Controller
View set point
Decrease set point
Increase set point