CH1 and CH2 Measurement Rates

For one channel of measurement, there is an overhead of one cycle of the sample rate after each sample time. For a 50Hz system, slow overhead is 20msec, fast overhead is approximately 1msec.

For two channels of measurement, there is an overhead of ten cycles of the sample rate after each sample time. If we consider two channels at the same sample times and rates, then the number of samples (per channel) and update time (2 channels of overhead) is:

P1 and P2 Linear Measurement

1. For one or two channels of measurement on the pulse inputs a new frequency or phase measurement will be available every 70ms for frequencies above 14.3Hz.
2. For input frequencies below 14.3Hz the update time is the same as the wave period, therefore for an input of 3Hz the measured result will occur every 333ms.
3. Frequency measurement times on P1 and P2 are totally independent of each other and the analogue inputs.
4. The phase measurement on P2 is dependent on the simulations frequency measurement on P1, as a result changes in phase that occur at a faster rate than the update time will result in large deviations in the measured phase result.

P1 and P2 Logical Condition

1. This is determining if P1 of P2 are high or low. This testing is generally done in the general equation although there is limited application using the setup wizard.
2. Update time is equivalent to a integer comparison within the general equation of < 0.1ms.