Measurement Computing LogBook Series - Manual (Page 167)

Software Reference 989592 LogView LV-41
Though the previous ten steps pertain to the first example, aside from functional differences, the method is
essentially the same for the remaining three examples. A figure and table have been placed after the
examples to identify various button options available with the Equation Assistant.
Example 2: CALC_00 And(P1_CH15>24)
Look at row 2 in the Calculated Channel Configuration screen above. You will see that the user created a
calculation function of CALC_00 And(P1_CH15 > 24) for the calculation channel having the channel ID
of CALC_01. In this example the user wants to use CALC_01 as a logic indicator based on the state of
both CALC_00 and physical channel P1_CH15.
In this example, channel CALC_01 will read 1 if both of the following are true:
a) CALC_00 has a value of 1.0
b) P1_CH15 has a value greater than 24
Assume that P1_CH14 had a channel reading of 23.09 and that P1_CH15 had a value of 21.81. In this
case, CALC_00 will have a value of 1.0 because P1_CH14 is greater than 23. P1_CH14>23 was set in
example 1.
In our example 2 function of CALC_00 And(P1_CH15>24) it is clear that although the first condition is
satisfied, we can see that the second is not, since P1_CH15 has a reading of 21.81. Because both
conditions are not satisfied, CALC_01 reads 0.0. Note that CALC_01 can be used in additional equations.
Example 3: P1_CH14+P1_CH15
Look at row 3 in the Calculated Channel Configuration screen (previous figure). You will see that the user
created a calculation function of P1_CH14+P1_CH15 for the calculation channel having the channel ID of
CALC_02. In this example the user wants to use CALC_02 to indicate to sum of two physical channels,
i.e., P1_CH14 and P1_CH15.
In this example, assume that:
a) P1_CH14 reads 25 volts, and
b) P1_CH15 reads 24 volts
In this case CALC_02 will be the sum, 49 volts.
Note that CALC_02 can be used in additional equations.
Example 4: P1_CH14*2
Look at row 4 in the Calculated Channel Configuration screen (previous figure). You will see that the user
created a simple calculation function of P1_CH14*2 for calculation channel CALC_03. In this example
the user wants CALC_03 to read twice the value of physical channel P1_CH14.
Note that CALC_03 can be used in additional equations.