How To Store Minimum And Maximum Measurements - Fluke 78 User Manual

78
Users Manual
How to Store Minimum and Maximum
Measurements
The MIN MAX function stores the lowest and highest
measurements made by the meter. In MIN MAX auto-
ranging and standby are disabled.
To use MIN MAX:
During MIN MAX operation the beeper will sound
continuously if an overrange (O.L.) condition is
detected, except in Diode test.
1. Put the meter in a measurement function.
When you put the meter in MIN MAX, you also lock
2.
the meter in its present range. Therefore, ensure that
the meter is in the desired range before you put the
meter in MIN MAX.
To do so, first take a measurement. Notice the range
shown at the upper-right of the bar graph.
If the meter is not in the desired range, press R
3.
momentarily to step up a range.
Each press steps up a range. After the highest range,
the meter wraps to the lowest range.
36
Note
When the meter is in the desired range, press R
4.
for 1 second to select MIN MAX.
MAX lights on the LCD, indicating MIN MAX is se-
lected, and the maximum reading is displayed. The
beeper sounds when a new minimum or maximum
value is recorded.
After MIN MAX is selected, press R to step through
the minimum (MIN lights), present (MIN and MAX blink),
and maximum (MAX lights) readings.
To exit MIN MAX and erase the stored readings, press
R for 1 second or turn the rotary switch. Because the
standby (sleep) mode is disabled, if you do not exit MIN
MAX, the meter records minimum and maximum values
until the battery goes dead.
Figure 16 shows how to use MIN MAX to check an oxygen
(lambda) sensor.