Sequences — Sequences allow user to create automated routines for the SP2. For example, the user can program the system to start file recording when particle concentrations have risen above a certain threshold. The system could also automatically turn the laser off when the temperature exceeds a set value, then wait a specified amount of time, and then turn the laser back on. Sequences are a powerful and flexible feature. Users can create brand-new routines from scratch using the Sequence Editor. Users who own the Auto Sampler (see below) can use a simple-to-use “wizard” to create Auto Sampler sequences.

Auto Sampler compatibility — The SP2 can now be used with the ASX-520 Auto Sampler from CETAC Technologies. The Auto Sampler allows the SP2 to sample from up to 240 sample vials as part of an automatic sequence. Users can customize sequences to specify when the probe should be rinsed, when data should be saved to a file, and other conditions.

User-defined calculated channels — SP2 version 4.2 allows the user to create new channels that are calculated from existing channels. Within the software, the user can specify simple formulas for these channels on the Calculations sub-tab. In addition, the user can create LabVIEW routines and import these routines to perform more complex calculations.

Manual mode for control channels — In SP2 4.2, control channels that are configured to use the Simple Control or PID Loop Control can be switched between Control Loop mode and Manual Set Point mode. This allows, for example, the Sample Flow Valve to be set to a constant value for part of the experiment, and then switched to the feedback loop control at other times. Manual Set Point mode can be useful in certain situations. For example, if the inlet pressure varies cyclically, using a control loop for the sample flow rate may result in the loop always attempting to compensate for these variations. In these circumstances, using a manual control for the sample flow reduces one source of error in measurement of the actual sample flow rate.

Timers — Users can easily create timer channels for use during sequences.

More intuitive interface — Depending on user selections for flow channels, sequence actions, and so on, the software automatically grays out unused parameters.

Increased flexibility — The software allows AC/DC control for four-channel 6110 data acquisition board.

Better Alarm indication — The new SP2 software has improved the Alarm readouts to make the current alarm conditions more obvious. In addition, it is now possible to change the alarm thresholds programmatically with Sequences, other Alarms, or CCL commands. This feature helps ensure Alarms are only active when they are needed.

Expanded documentation — An updated and expanded software manual describes each of the new features in detail. It provides step-by-step instructions for commonly performed procedures such as acquiring data, changing configuration files, and writing sequences.