PCX5200 User’s Manual Chapter 2
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Here are two examples to use the Keypad and Liquid Crystal Display User Interface
A. How to start a routine Preset Analysis.
In this example, we will load a Preset program—Program 2 (named Glyphosate); enable
the PCX5200; and then turn on the post-column pump.
1. Turn on main power switch in the back of the PCX5200;
The POWER LED light turns green.
The ENABLE LED is off.
The PUMP LED is off.
The STATUS LED is off.
2. Press and hold the PRESET key; the LCD shows: “Load preset…”
3. While holding down the PRESET key, press the ∇ key; the LCD shows: “# L Name of
program”; for example Program number 1 is Carbamate, the LCD then shows “1 L
Carbamate”. The letter L stands for Load. Of course, in this example, we want to use
Program 2. With the PRESET key still held down, press the ∇ key a second time, the
LCD will now shows “2 L Glyphosate”. Release the PRESET key.
Note: there are five preset programs. Pressing the ∇ key (while holding the PRESET
key) each time will change to the next preset program. Of course, by pressing the ∆
key instead of the ∇ key, you could go back to the previous preset program.
These 3a–d steps are optional but it will help you to familiarize with other functions.
3a. Press the column TEMP key; the LCD displays the current temperature of the
column oven: “Column ##°C <*”. The < sign indicates that the temperature of the
column oven is below that of the set point. When the temperature of the column
oven reaches the set point, the sign will change to an = sign. If it is above the set
point, it becomes a > sign. The flashing * sign indicates that the column oven is
heating up.
Note: the column oven warms up automatically in the Glyphosate and Amino Acids
methods (without enabling the PCX5200). The column oven does not warm up
automatically in the Carbamates application. By default, the power to the column
oven is controlled by the ENABLE function. However the power cutoff to the column
oven can be overridden so that the column oven remains on independent of the
ENABLE function. We will learn how to change this function in a later example.
Keypad Examples
Loading a Preset
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