Scope and Multimeter Operations
Technical Specifications (Scope Module)
100
a
a
Ohms
Measures electrical resistance (opposition to current) 0
to 4 M Ohms. Scope supplied DC current is passed
through the circuit to measure the resistance between
the two connected test leads.
a
Diode/Continuity
Measures voltage drop across a diode and continuity
through a diode. Scope supplied DC current is passed
through the diode to measure the voltage drop between
the two connected test leads. Typical setup for positive to
negative current flow - positive lead (anode +/side) and
negative (cathode -/side).
a
Frequency
Measures the number of times a signal repeats itself per
second. Used to measure frequency of signals such as
CKP, CMP and wheel speed sensors.
a
Pulse Width
Measures the on-time of various components
(e.g. components that cycle on and off like the EGR, or
canister purge valve).
a
Injector Pulse
Width
Measures fuel injector on-time when checking for
variances when engine load is changed and/or physical
problems with the injector.
a
Duty Cycle
Measures the ratio of the pulse width to the complete
cycle width, the on-time of components that cycle on and
off like EGR, or canister purge from 0–100%.
a
a
a
Low Amps (20)
Used to measure amperage of typical devices (e.g.
ignition coils, injectors, fuel pumps) that may draw up to
20A peak (startup) when initially started. Also used to
measure parasitic draw.
a
a
a
Low Amps (40)
Used to measure amperage of typical motors and
devices that may draw up to 40A peak (startup) when
initially started.
a
a
a
Low Amps (60)
Used to measure amperage of larger motors and devices
that may draw up to 60A peak (startup) when initially
started.
a
MC Dwell (60)
Measures carburetor Mixture Control Solenoids (0–60°).
The duty cycle of the solenoid is expressed in the dwell
angle of a 6 cylinder engine: 100% = 60 deg.
a
MC Dwell (90)
Measures fuel system Mixture Control Solenoids (0–90°).
The duty cycle of the solenoid is expressed in the dwell
angle of a 4 cylinder engine: 100% = 90 deg.
a
a
100 PSI Vacuum
Used to measure vacuum up to 20 in.Hg, using the 0–
100 psi transducer.
D
M
M
G
M
M
L
S
Test
Function
a
a
100 PSI Pressure
Used to measure pressures for typical systems such as,
fuel, oil, EVAP, hydraulic/transmission fluid etc. up to 100
psi, using the 0–100 psi transducer.
a
a
500 PSI Pressure
Used to measure pressures for typical systems such as,
hydraulic/transmission fluid pressure, cylinder
compression, and AC high side up to 500 psi, using the
0–500 psi transducer.
a
a
5000 PSI
Pressure
Used to measure pressures for typical systems such as,
ABS, power steering, and heavy-duty hydraulic system
fluid up to 5000 psi, using the 0–5000 psi transducer.
D
M
M
G
M
M
L
S
Test
Function
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