Digital Volt Meter - EcoWater CHC Series Service And Troubleshooting Manual

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4.1

Digital Volt Meter-

The DVM is a meter that can be used to Test Voltages, Amperages, component continuity as well as
other uses. A DVM should not be used if any physical damage to the device or its probes have been
found.
Each DVM is different and its labeling and appearance can change. Here is an example of a DVM and
you will see to the right, that there are several possible symbols for each function. (Example only,
may not represent your meter)
The function of the meter depends upon the function Selector and its position. Here are some examples
of when to use each function:
Voltage DC (VDC or V+/-)- Uses the Probes and measures direct current voltages. The black lead
will go onto a ground or negative wire or V- connection and the red lead will go onto the power or +
wire or terminal. The Display must show the DC Voltage indicator. (Uses can include measuring the
voltage of a battery, or DC power supply, or a DC control voltage or Analog transmitter signal.)
Voltage AC (VAC or V~)- Uses the Probes to measure alternating current voltages. The black or red
probes must be placed on the powers, or power and neutral, or power and ground to measure the
voltage. (Uses can include measuring the voltage on a motor, motor contactor, electrical supply, control
voltage if AC)
Amperage (AC)- Uses the AC Amp Clamp and it will measure the AC Amperage passing through a
wire to a motor or other power load.
Continuity- Uses the Probes and measures the resistance to power passed through an object from the
black probe to the red probe. Most DVMs will also beep as the continuity is verified. This function
can be used to verify if a fuse is good (0
on the display and the fuse must be replaced. It can also be used to verify any coil, wire, or connection
for continuity. A coil will have an indication of some resistance (2000 K ), a wire or connection
should indicate 0 and sound the beep. This function should never be used while power is applied
Probes
480 V
V V A
Common V
AC AMP Clamp
Voltage DC= V,VDC, DC,
Voltage AC= V, VAC, AC,
Amperage = A, AAC, A
Display
Continuity = ,
Black Lead = Common
Selector
Red Lead = Volts supply
Probe connections
on display and beep sounded) or bad 1.__
,
will be shown
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