Fluke 91 Series II User Manual page 135

8 - 6
A. FINDING THE MINIMUM AND MAXIMUM.
The Minimum and Maximum levels in this example are DC.
To select DC Volts as the main reading:
2. Press .
3. Press (V).
4. Press to select the highlighted function V DC
METER.
The first reading shows the "V DC" reading. Notice the
numerical readout is unstable and the waveform display
shows a changing level, sometimes high, or low, or with a
vertical edge, and the ranging relays are still slowly
clicking. (See Figure 8-3.)
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Figure 8-3 Unstable V DC Display
Users Manual