Metrohm 921 NIRS Vial Heater - Manual (Page 12)

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Controller Operation
The Controller display consists of two four-digit
displays, one RED and one GREEN.
The current set point is the lower, green display.
The current temperature of the vial block is the
top, red display.
There are four buttons below the display:
• INDEX button -- changes display mode.
• UP arrow -- used to raise a set point.
• DOWN arrow -- used to lower a set
point.
• ENTER key -- confirms a setting change.
At power-on, all display segments will illuminate.
The display will quickly change to SELF-TEST.
Once self-test is complete, the red segments
(upper display) will display the current
temperature of the Vial Heater block. The green
segments (lower display) will display the set
point.
To change the set point:
1. Press the INDEX button. The set point will be displayed in red and SP1 will be displayed in green.
2. Select the desired temperature using the UP and DOWN arrows.
3. When the correct temperature is displayed, press ENTER to set the new value. This ENTER is
required to establish the correct set-point. If not performed, the set point will not be stored in the
controller memory, and the unit will not function properly.
4. After the value has been set, press INDEX to return to the normal operation mode. The actual
temperature will now be in RED and the desired temperature will be displayed in GREEN.
Once the displayed temperature of the Vial Heater module stabilizes, analyze the sample according to
your established analytical protocol.
WARNING!
The vial heater block may be operated at temperatures in excess of 200 °C. DO NOT touch
the block or severe burns could occur. Always handle vials with an appropriate holding
device. Follow established safety methods whenever handling hot objects.
The Vial Heater Block retains heat and may be dangerously hot even when module is
turned off or unplugged. Never touch the heater block without first measuring its
temperature.