3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
App
Index
Measurement Action
Measurement action refers to a sequence of measurement operations that is carried
out as a result of a measurement trigger. If a measurement trigger is applied, the
measurement operation will start after the measurement delay elapses. Measurement
Busy (MeasBusy) is set low when a measurement trigger is applied and returns to high
after the measurement operation is completed.
The entire measurement operation involves steps 1 to 4 below.
1.
Auto Range Measurement
If auto measurement range is ON and the GS820 decides that the measurement
range is not appropriate, a measurement for determining the range is performed. If
fixed measurement range is selected, nothing is performed.
In some cases, several measurements are made.
2.
Measurement
The GS820 performs the target measurement. This measurement requires integration
time + software processing time.
3.
Zero Reference Measurement (see the next page)
The GS820 performs zero reference measurement if the auto zero function is ON.
This measurement requires integration time + software processing time. If the auto
zero function is OFF, nothing is performed.
4.
Computation (see section 2.8)
The GS820 performs various computations. The processing time varies depending on
the number of averaged points, the complexity of the equation, and so on.
The GS820 computes the following four types in order.
1. Averaging
The moving average over the average count of measured values is the result. If
averaging is OFF, nothing is performed.
2. NULL computation
Subtracts the NULL reference value from the measured value and makes the
difference the result. If NULL computation is OFF, nothing is performed.
3. Equation (MATH) computation
Solves the built-in or user-defined equation. If equation computation is OFF, nothing
is performed.
4. Comparison operation
Compares the measured value against the upper and lower limits and classifies the
result into one of three types: Low (measured value < lower limit), IN (lower limit ≤
measured value ≤ upper limit), or High (upper limit < measured value). The result is
shown on the display and output to the external I/O connector on the rear panel. If
comparison operation is OFF, nothing is performed.
MeasBusy
signal
Displays the measured value
Outputs the comparison result
Stores to the storage memory
Measurement
delay
Measurement
trigger
Jitter caused by
software processing
Auto range
measurement Measurement
Zero
reference
measurement
Computation
Note
If you change the GS820 settings while the measurement action is being carried out, the
corresponding measurement becomes invalid. The measurement result display in this case
becomes “-----,” and the result is not stored.
2.4 Measurement
2-17
IM 765601-01E
Explanation of Functions