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80 Series III
Users Manual
30
MIN MAX Recording Mode
The MIN MAX mode records minimum and maximum
input values. When the inputs go below the recorded
minimum value or above the recorded maximum value,
the meter beeps and records the new value. This mode
can be used to capture intermittent readings, record
maximum readings while you are away, or record
readings while you are operating the equipment under
test and cannot watch the meter. MIN MAX mode can
also calculate an average of all readings taken since the
MIN MAX mode was activated. To use MIN MAX mode,
refer to the functions in Table 8.
Response time is the length of time an input must stay at
a new value to be recorded. A shorter response time
captures shorter events, but with decreased accuracy.
Changing the response time erases all recorded
readings. Models 83 and 85 have 100 millisecond and
1 second response times; Model 87 has 1 second,
100 millisecond, and 250 µs (peak) response times. The
250 µs response time is indicated by "1 ms" on the
display.
The 100 millisecond response time is best for recording
power supply surges, inrush currents, and finding
intermittent failures. This response time follows the
update time of the analog display.
The high-accuracy 1 second response time has the full
accuracy of the meter and is best for recording power
supply drift, line voltage changes, or circuit performance
while line voltage, temperature, load, or some other
parameter is being changed.
The true average value (AVG) displayed in the 100 ms
and 1 s modes is the mathematical integral of all readings
taken since you started recording. The average reading is
useful for smoothing out unstable inputs, calculating
power consumption, or estimating the percent of time a
circuit is active.