| DataTaker modes and inputs
This window lets you set up and the DataTaker's ability
to return temperatures (instead of microvoltages) from thermocouples (note
that the default setting is for copper-constantan thermocouples).
It also allows selection of differential or single-ended inputs for voltage
measurements, or use of the high-speed counter:
In this example, there are 6 channels in use. Two channels (#5 and #6) use copper-constantan thermocouples. The remaining channels read voltages; two are connected as single-ended inputs (#3 and #4) and two as differential inputs (#1 and #2).
You should use the 'high-accuracy' mode unless achieving the highest possible sampling speed is critical.
• Note that LabHelper automatically switches 'high-speed' mode ON if you request a sample rate faster than 10 samples/second. This does NOT affect mains frequency filtering; you have to turn that on or off manually.
The 'Mains frequency' buttons are for filters that reduce electrical noise from AC power supplies; depending on country (and sometimes region), the AC frequency is either 50 or 60 Hz.
*This means that as you add channels, the sampling rate decreases: for example, with 2 channels, the maximum sampling speed is about 5 samples/second in 'high-accuracy' mode.