Graph Display - Detailed Explanation

55 16. Graph Display - Detailed Explanation (Note: Riden Calls this ‘Curve mode’ in their documentation) Graph Mode, also known as ‘Layout 3’, is entered by pressing the “◄” or “►” button until the proper layout is selected. After running for a short while, graph mode might look like this: The action of the graph is similar to roll mode in an oscilloscope. The new values are placed at the right margin (axis) and push the older values to the left. ‘V-SET’ and ‘I-SET’ values are shown in the top right in yellow, under the heading "SET". Under the "OUTPUT" heading are the values measured at the output of the RD60xx. The value in green on the right is the current Voltage. Under that, in cyan, is the current amperage (the load in this case is a 10 Ohm, 20 Watt resistor). Under that in pink is the current Power being output, which is the product of the previous two values. Those colors correspond to the units of the lines on the graph. The white/gray line (the topmost line on the graph) is the temperature reading from the External (EXT) Temperature sensor. The icons and values shown at the bottom of the screen are the same as in other modes. The line directly below the graph contains the y-axis per-interval amounts. (The “D:” is believed to indicate ‘Divisions’ - This is part of the original firmware so cannot be said for certain.) So for Voltage (green) it is 1.00 Volts per division and the green line is constant, at 3 intervals up, so close to 3.00 volts (actually we can see it is 2.995 Volts).

56 The pause symbol (two, parallel white bars with a blue background) indicates the graph is paused. When running the graph state is shown as a white arrowhead with a red background at the same position. The pause/run state can be toggled by pressing “ENTER” in graph mode. (Sometimes it needs to be pressed twice). The rate at which the graph moves is controlled by the ‘Graph Window’ setting found within the ‘Quick Settings’ Menu. “SHIFT”+ “▼” The fastest setting permitted is 1 minute and that implies that a set of values written at the right margin will take 1 minute to be pushed to the left margin. If the Graph Window setting was 1 hour then values will take 1 hour to move from the right margin to the left margin. The ‘Graph Window Time’ shown top left, is what is being set in the ‘Graph Window’ setting. (note that the display of the windows time in top left is missing in some images in this doc, as this is a feature that arrived in firmware version 1e) This image shows a graph of the RD60xx driving a DC load in CR (constant resistance) mode. The resistance is lowered in stages until the I-SET value is reached after which the PS goes into CC mode.

57 This example image shows a graph of trickle charging a 12 Volt lead-acid car battery. The Battery Charger Group’s setting ‘Cutoff time’ was set to 1 hour and the external temperature sensor was placed under the RD60xx enclosure. After 1 hour, the charging ceased with 6.64 Watt-hours of energy being transferred. The battery symbol on the bottom line shows that the RD60xx was used in Battery Mode. The white TIME, with a red background, is the reason why the charging cycle stopped. Switch to Autoscaling (Y-Axis): “MEM” + Press/Click “ENCODER” Pause/Play: “ENTER” Select parameter to scale: “ENCODER” Change Offset Y : “▲” or “▼” Reset Offset Y: “MEM” + (“▲” or “▼”)

• Graph (View) mode Only {Todo: Integrate below into this section} Repeatedly pressing the auto-scaling combo cycles through: voltage current power external temperature auto-scaling If it is in one of the first four then the "D" (for division) is in white with a red background. When it is in auto-scaling mode the "D" has the default background. Organize View mode specific commands better

58 16.1. Graph (View) Mode “MEM” + “ENTER” In Graph (View) Mode, a vertical red Indexing line appears on the graph (it starts at the right margin) and can be moved left and right with the “ENCODER” knob. Pressing the “ENCODER” knob toggles between coarse and fine adjustment of the Indexing line position. Where the Indexing line intersects the (Voltage, Current, Wattage, and EXT Temperature) graph lines, the values of those lines are displayed on the right, along with a timestamp that corresponds to the x-axis position. To Exit Graph (View) Mode, Press “ENTER”. Note: “ENTER” Does NOT pause/resume the graph while in View Mode