Fluke 78 - Page 49

How to Store Minimum and Maximum Measurements
37
FUSED
10A
30V
°C°F
300V
30V
RPM
+
COM
V
CAT
RPM
2
1
1
Hz
MIN / MAX
PRESS
OFF
A
°C°F
HzV
Hz
V
78
AUTOMOTIVE METER
1 SEC
2 SEC
034
DC
2
V
1
1
5
2
4
3
MAX
HEATER WIRES
SIGNAL WIRE
CHASSIS
GROUND
O
2 (LAMBDA) SENSOR
EXHAUST MANIFOLD
Turn off engine and insert test leads in the jacks shown.
Set rotary switch to volts dc. The meter defaults to the 40 V range.
Press the pushbutton 5 times to step to the 4 V range.
Connect the test leads to the sensor as shown. Start the engine. If the sensor
is unheated, fast-idle the car for a few minutes.
Press the pushbutton for 1 second to enter the MIN MAX mode. Let the engine
run for a few minutes to allow the meter to record enough readings.
Press the pushbutton to display the minimum reading; press again
to display the present reading; press again to display the maximum reading.
1
2
3
4
5
mt16f.eps
Figure 16. Using MIN MAX to Check an Oxygen Sensor