Automotive Multimeter
HiRes Mode
For zero adjustments, set the Meter to the desired function,
short the test leads together, press
F
; then connect
the leads to the circuit under test. Adjust the circuit's
variable component until the display reads zero. Only the
center segment on the zoom bar graph is lit.
For peak adjustments, set the Meter to the desired
function, connect the leads to the circuit under test; then
press
F
. The display reads zero. As you adjust for a
positive or negative peak, the bar graph length increases
to the right or left of zero. If an overange symbol lights
(
<
or
>
), press
F
twice to set a new reference; then
continue with the adjustment.
HiRes Mode
Pressing
H
for one second causes the Meter to enter the
high-resolution (HiRes), 4-1/2 digit mode. Readings are
displayed at 10 times the normal resolution with a
maximum display of 19,999 counts. The HiRes mode
works in all modes except capacitance, frequency counter
functions, temperature, and the 250
µ
s (peak) MIN MAX
modes.
To return to the 3-1/2 digit mode, press
H
again for one
second.
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.
Model 88 V has 100 millisecond, and 250
µ
s (peak)
response times. The 250 µs response time is indicated by
"
p
" on the display.
The 100 millisecond response time is best for recording
power supply surges, inrush currents, and finding
intermittent failures.
The true average value (AVG) displayed in the 100 ms
mode is the mathematical integral of all readings taken
since the start of recording (overloads are discarded). The
31
