Fluke 189 user manual Selecting the Range, Understanding the Display, Primary Display

Model 187 & 189

Users Manual

Selecting the Range

Press R to select either a fixed range or the autorange feature.

Note

You cannot use R in conductance, diode test, and temperature functions or with the REL, MIN MAX, and FAST MN MX features. These selections all use a specific fixed range.

Autoranging (AUTO lighted in the display) always comes on initially when you select a new function. In autorange, the meter selects the lowest input range possible, ensuring that the reading appears with the highest available precision (resolution).

If AUTO is already on, press R to enter MANUAL ranging in the present range. You can then select the next manual range each time you press R. Return to autoranging by pressing O N (CANCEL).

Understanding the Display

Display features are shown in Figure 2-4 and described in Table 2-3. Major display features are described in the following paragraphs.

Note

You can show all display segments (as shown in Figure 2-4) by pressing Q while turning the meter on. Release Q to turn off the full display.

Primary Display

The primary display usually shows the present reading for the rotary switch function. For most of these functions, the primary display can be set to show 4 or 5 digits. See Chapter 5 for more information about display digits.

Other uses for this display are:

•AutoHOLD: most recent held reading.

•MIN MAX: maximum, minimum, or average value.

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