Fluke Biomedical 190M - Manual (Page 50)

190M Series Medical ScopeMeter
Users Manual
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Now the large reading is the actual input value minus the
stored reference value. The bargraph indicates the actual
input value. The actual input value and the reference value
are displayed below the large reading (ACTUAL: xxxx
REFERENCE: xxx), see Figure 18.
Figure 18. Making a Relative Measurement
You can use this feature when, for example, you need to
monitor input activity (voltage, temperature) in relation to a
known good value.
Adjusting the reference value
To adjust the reference value, do the following:
5 F3 Display the Adjust Reference
menu.
6 Select the digit you want to
adjust.
7 Adjust the digit. Repeat step 6
and step 7 until finished.
8
ENTER
Enter the new reference value.