Quickie Pulse Service Manual download pdf (Page 6)

PULSE 6 SERVICE MANUAL

PAGE 0.4

2009SUNRISE MEDICAL

This section describes the basic symbols used in a typical

multimeter.

This symbol means alternating current. Use this when you want to

test something that has AC current running through it. Typically you’d

want to test the voltage of an inverter (for cold cathodes or neons) or a

similar device.

This means Direct Current. This is the type of electrical power produced by

a battery. With a battery connector, the black wire(s) should be connected to

the negative(-) terminal of the battery and should be considered the common

ground. The red wire(s) should be connected to the positive(+) terminal of the

battery and is considered the “hot” lead.

Voltage

This means Voltage or Potential Difference. This measures the potential

difference between the two probes. To measure voltage, connect the positive

probe to a port that is marked “V” or Voltage.

Note: “mV” means milli-volts .001 Voltage

Current

Technically, this term is incorrect. It should be “I” but since current is measured

in Amps and the readout value is in amps, the symbol makes sense. This

measures the current that is ﬂ owing through the part of the circuit between the

two probes (the meter itself). Typically, you need to plug the positive terminal

into a port marked “A” or Current. You need to put the meter “In Series” in the

circuit to use this feature correctly.

Resistance

This symbol means Resistance and is measured in Ohms. You can use this

setting to measure the resistance between two points; for example across a

piece of wire or a resistor (to check its value). If you don’t have a continuity

check, then this can be used to check for shorts. Any value below 0.05 Ohms

constitutes a short, meaning that whatever the probes are attached to is

connected electrically.

Continuity

A commonly used function. Basically, what it does is put a current through the

two terminals (the same as the Ohm-meter function) and if the resulting value is

within the “contact” range, it will beep. This feature found on some multimeters

enables you to check for shorts without taking your eyes off your work. Other

meters may have a light that turns on when a short is found.

Symbols

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Quickie Pulse Service Manual Page 6