Measurement Operation; Multimeter Basic Testing; Ac And Dc Voltage Testing; Dc Current Testing - KNOVA KN 8056 Manual

Display Symbols
No. Symbol
The battery is low.
Warning: To avoid false
1
readings, which could lead to
possible electric shock or personal
injury, replace the battery as soon
as the battery indicator appears.
Indicator for AC voltage or current.
AC
The displayed value is the mean
2
value.
Indicates negative reading.
3
Test of diode.
4
The continuity buzzer is on.
5
Date hold is active.
6
Indicator of connecting test leads
Connect
7
into different input terminals.
Terminal
Ohm. The unit of resistance.
Ω:
kΩ: kilohm.1 x 103 or 1000 ohms.
Ω, kΩ,
MΩ: Megaohm. 1 x 106 or
M Ω
1,000,000 ohms.
V: Volts. The unit of voltage. mV:
mV, V
Millivolt. 1 x 10-3 or 0.001 volts.
A: Amperes (amps). The unit of
8
mA, A
current. mA: Milliamp. 1 x 10-3 or
0.001 amperes.
DWLL
Test of Dwell.
RPM x 10
Tach x 10.
4CYL,
Number
of
6CYL,
cylinders
8CYL

Measurement Operation

Multimeter Basic Testing

A. AC or DC Voltage Testing (see figure 3)
figure 3
WARNING
To avoid harms to you or damages to the
multimetereter from electric shock, please do not
attempt to measure voltages higher than 1000Vp
although readings may be obtained.
Meaning
The DC voltage ranges are: 200.0mV, 2.000V,
20.00V, 200.0V and 1000V.
The AC voltage ranges are: 2.000V, 20.00V,
200.0V and 750V
To measure DC or AC voltage, connect
the multimeter as follows:
1. Insert the red test lead into the V terminal and
the black test lead into the COM terminal.
2. Set the rotary switch to an appropriate
measurement position in V
3. Connect the test leads across with the object
being measured. The measured value shows on
the display.
Note
• If the value of voltage to be measured is
unknown, use the maximum measurement
position (1000V) and reduce the range step by
step until a satisfactory reading is obtained.
• The LCD displays "1" indicating the existing
selected range is overloaded, it is required to
select a higher range in order to obtain a correct
reading.
• In each range, the multimeter has an input
impedance of approx. 10MΩ. This loading effect
can cause measurement errors in high impedance
circuits. If the circuit impedance is less than or
equal to 10kΩ, the error is negligible (0.1% or
less). When DC voltage measurement has been
completed, disconnect the connection between
the testing leads and the circuit under test.
B. DC Current Testing (see figure 4)
figure 4
WARNING
Never attempt an in-circuit current
measurement where the open circuit voltage
between terminals and ground is greater than 250V.
If the fuse burns out during measurement, the
multimeter may be damaged or the operator himself
may be hurt. Use proper terminals, function, and
range for the measurement. When the testing leads
are connected to the current terminals, do not
parallel them across any circuit.
4
. or V