MAC TOOLS EM721 Manual Del Usuario página 16

24. . Indicates the polarity of the input.
Also indicates a – (negative) or + (positive) trigger slope when a trigger slope is selected.
HIGH TIME
1 DUTY CYCLE
Select a negative (-) trigger slope to measure low (-) time and a positive (+) trigger slope to measure high
(+) time. For example, when measuring duty cycle of the Mixture Control Solenoid, the low (-) time is the
On time in most cases.
25. ANALOG DISPLAY SCALE. Displayed with 41-position analog pointers.
26. The following symbols indicate the unit of the value displayed:
DWL°
%
°C/°F
Ω
kΩ
MΩ
Hz
kHz
V
mV
A
mA
µA
µF
mS
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LOW TIME
The number of degrees of distributor rotation where the points remain closed,
measured for 1 to 12 cylinders
Percent, used for duty cycle measurement
Centigrade or Fahrenheit temperature measurement
Ohms
3
Kilohm (1 × 10 Ohms)
6
Megohm (1 × 10 Ohms)
Hertz (1 cycle/sec)
3
Kilohertz (1 × 10 cycles/sec)
Volts
-3
Millivolts (1 × 10 Volts)
Amperes (Amps)
-3
Milliamperes (1 × 10
-6
Microamperes (1 × 10
-6
Microfarads (1 × 10 Farads)
-3
Milliseconds (1 × 10
Amps)
Amps)
seconds)
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