Section 2: General operation
Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
2-134
DMM7510-901-01 Rev. B / May 2015
Making secondary measurements
When you are using the secondary measurements feature, any settings that you change from the
front panel of the instrument affect the primary function (the function shown at the top of the
Secondary swipe screen). To change settings for the secondary function (the function shown at the
bottom of the Secondary swipe screen), you need to swap the functions. Select the
Swap Primary
button to switch the primary and secondary functions. Changes made for a particular measure
function while in the primary will remain set for that measure function until specifically changed.
Measurements are stored in separate reading buffers. By default, the primary measurements are
stored in
defbuffer1
and secondary measurements are stored in
defbuffer2
. For the primary
measurement, you can change the reading buffer by making it active. Refer to
(on page 3-23) for detail. You cannot change the reading buffer for the
secondary measurement.
Secondary measurements are not available for use with the trigger model.
To make secondary measurements:
1. Make connections to the instrument appropriate to both types of measurements. Refer to
(on page 2-94) for connection information.
2. Swipe to the SECONDARY swipe screen.
3. Set up the primary function as needed.
4. Select Second Function to select the secondary function.
5. If you need to change settings for the secondary function, select
Swap Primary
. Make the
settings as needed, then select
Swap Primary
again.
6. Hold the
TRIGGER
key for 2 seconds and select
Continuous Measurement
or
Manual Trigger
Mode
.
7. Select
Secondary Measure
.
8. If you selected Continuous Measurements, measurements for both functions begin. If you
selected Manual Trigger Mode, measurements are made when you press the
TRIGGER
key.
Displayed measurements
When you make measurements, the instrument may perform operations on the measured values that
affect what you see on the display and the measurements that are stored in the buffer.
The operations that can affect the measurement display are:
•
Filtering
•
Relative offset
•
Math operations
•
Limit tests
If none of these operations is set, the value that is displayed on the front panel is the actual
measurement reading.
If any one of these operations is set, the value that is displayed is the measurement reading with
these operations applied. The operations are applied in the order shown above.
For example, if you made a measurement and had a relative offset and limit tests active, the
measured value would have the relative offset applied, then have limit test results applied.
For additional detail on the order of operations, see
(on page 4-15).
