The Sample Cursor

The sample cursor is a vertical red line on the graph that you can position with the mouse, or any of the Go To functions. At all times, the time and temperature at the sample cursor are displayed at the top of the Temprecord data window.

The position of the sample cursor is also important when the zoom functions are used. See the topic Zoom Functions for more information.

•The left and right arrow keys. These move the cursor horizontally by one sample. If the sample cursor reaches the edge of the window, the window will scroll horizontally. Note that at lower horizontal zoom factors, more than one sample can be represented by a display pixel. In this case, the arrow keys will change the sample under the cursor, but the cursor may not necessarily move on the display.

•Clicking on the graph. If the graph view window is clicked, the cursor sample is set to the closest sample to the sample cursor. If the mouse button is held down, the sample cursor is ‘dragged’ along with the mouse cursor.

•The Find Trace function. This function does not actually move the sample cursor from the sample it is currently on, but instead shifts the trace vertically so that you are guaranteed of seeing the trace. It is useful when you have ‘lost’ the trace at higher zoom factors.

•The Go to First, Go to Last Sample functions. These move the sample cursor to the first and last sample respectively of the logged temperatures. Note that if loop overwrite was enabled when the logger was recording, the first sample in the sample record will not necessarily be the first one taken by the logger.

You can also move quickly to the first sample with the Home key, and to the last sample with the End key

•The Go to Start, Go to End functions. These move the sample cursor to the start sample and end sample respectively of the logged temperatures.

The start sample and end sample are set to the first and last sample when a logger or file is read, but you can alter them to select a particular range of samples. See Using the start and end markers for more information.

The start sample is marked on the graph with the flag symbol. The end sample is marked on the graph with the flag symbol.

•The Go to Next, Go to Previous Marker functions. These move the sample cursor to the next user marker in the record, or the previous user marker in the record, using the sample at the cursor as the starting point. If there are no more markers from that point on, the cursor does not change. User marker are those inserted into the sample record by pressing the button on the logger. The allow markers parameter must be checked before markers can be inserted into the sample record.

You can quickly move to the next marker by pressing the Ctrl-N key (hold the Ctrl key down and press the ‘N’ key. You can also move quickly to the previous marker with the Ctrl-P key.

The markers are shown on the graph with the flag symbol.

•The Go to Min, Go to Max Sample functions. These move the cursor to the minimum value sample and maximum value sample respectively of the logged temperature and/or humidity values.

The behaviour of these functions changes somewhat when both temperature and humidity traces are displayed. If the cursor is not currently positioned at a minimum temperature or humidity sample, then the Go to Min.function moves the cursor to minimum temperature sample. If the cursor is already on the minimum temperature sample then the Go To Min function moves it to the minimum humidity sample. If the cursor is already on the minimum humidity sample then the Go To Min function moves it to the minimum temperature sample. Equivalent behaviour exists for the Go To Max function.

The maximum and minimum are only calculated between the start and end samples. When a file or logger is first read, the start and end sample are set to the first and last sample respectively, so the minimum and maximum displayed are for the whole sample record. If the start and/or end samples are altered however, the maximum and minimum are recalculated. See Using the start and end markers for more information.

The maximum and minimum are only calculated over the samples stored in the logger at the time the logger was read or saved to a file. If loop overwrite is enabled, there may well be samples that have since been overwritten that would have been below the minimum or above the maximum

You can move quickly to the minimum sample by pressing the F4 key, and to the maximum sample by pressing the F5 key.

The maximum sample is marked on the graph with the flag symbol. The minimum sample is marked on the graph with the flag symbol