Fluke 2686A 사용자 설명서

Managing Your Network Using Fluke DAQ

49

Each computed channel can have an expression of 250 characters but the
maximum number of characters available in all 60 channels is limited to 6,000
characters.

For example, you could use an equation to calculate the rate of flow in gallons per
second. The rate of flow could be calculated as follows. Since TS is in
milliseconds, you need to divide by 1000 to calculate gallons per second. In this
example, during the first pass, C902 will not be defined and the result will be not a
number (#Inf). However, in subsequent passes, C902 will be defined and will
provide the correct result.

C101 = some fake measurement to force the time calculation

C901 = (TOT-C902)/(TS/1000)

C902 = TOT

Computed channels and the time value are initialized to zero at the beginning of
scanning. Physical channels that haven’t been measured are still initialized to
positive infinity.

To measure the total energy used by a simple system, a calculation could be
generated using the equation, energy = R x I^2 * time, as follows:

c101 = Ohms

c102 = Current

c959 = c959+c960

c960 = c101*c102**2*ts/1000