MAC TOOLS EM721 - Analog Scale and Unit Symbols

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24. . Indicates the polarity of the input.
Also indicates a – (negative) or + (positive) trigger slope when a trigger slope is selected.
HIGH TIME
LOW 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° The number of degrees of distributor rotation where the points remain closed,
measured for 1 to 12 cylinders
% Percent, used for duty cycle measurement
°C/°F Centigrade or Fahrenheit temperature measurement
Ω Ohms
kΩ
Hertz (1 cycle/sec)
Kilohertz (1 × 10 cycles/sec)
Volts
Millivolts (1 × 10 Volts)
Amperes (Amps)
Milliamperes (1 × 10 Amps)
Microamperes (1 × 10 Amps)
Microfarads (1 × 10 Farads)
Milliseconds (1 × 10 seconds)
Megohm (1 × 10 Ohms)
6
3
-3
-3
-6
-6
-3
3
Kilohm (1 × 10 Ohms)
MΩ
Hz
kHz
V
mV
A
mA
µA
µF
mS