APPA 501 Manuale utente
LIMITED
WARRANTY
YEARS
User Manual / 使用說明書 / 使用说明书
ユーザーマニュアル
Руководство пользователя
501/502
RU
EN
TC
SC
JP
Digital Multimeter
Мультиметр цифровой
萬用電表
万用电表
デジタルマルチメーター
Read First
!
!Safety Information
Understand and follow operating instructions carefully.
Use the meter only as specified in this manual;
otherwise, the protection provided by the meter may be
impaired.
Identify hazardous conditions and actions that could
cause BODILY HARM or DEATH.
• If the equipment is used in a manner not specified by
the manufacturer, the protection provided by the
equipment may be impaired.
• Always use proper terminals, switch position, and
range for measurements.
• To reduce the risk of fire or electric shock, do not
expose this product to rain or moisture.
• Verify the Meter operation by measuring a known
voltage. If in doubt, have the Meter serviced.
• Do not apply more than the rated voltage, as marked
on meter, between terminals or between any terminal
and earth ground.
•To avoid false readings that can lead to electric shock
and injury, replace battery as soon as low battery
indicator blinks.
• Do not use Meter around explosive gas or vapor.
• When using test leads or probes, keep your fingers
behind the finger guards.
• Remove test lead from Meter before opening the
battery door or Meter case.
• Use caution with voltages above 30 Vac rms, 42 Vac
peak, or 60 Vdc. These voltages pose a shock
hazard.
• Probe assemblies to be used for MAINS measure
ments shall be RATED as appropriate for MEASURE
MENT CATEGORY III or IV according to IEC
61010-031 and shall have a voltage RATING of at
least the voltage of the circuit to be measured.
• Only replace the blown fuse with the proper rating as
specified in this manual.
• Do not attempt a current measurement when the
open voltage is above the fuse protection rating.
Suspected open voltage can be checked with voltage
function.
Warning
!
501 / 502 EN
1
• Never attempt a voltage measurement with the test
lead inserted into the A input terminal.
• Disconnect circuit power and discharge all high-voltage
capacitors before testing resistance, continuity, diodes,
or capacitance.
Caution
!
Identify conditions and actions that could cause
DAMAGE the meter or equipment under test.
• Disconnect the test leads from the test points before
changing the position of the function rotary switch.
• Never connect a source of voltage with the function
rotary switch in resistance, diode, continuity, and
capacitance position.
• Do not expose Meter to extremes in temperature of
high humidity.
• Never set the meter in Ampere function to measure
the voltage of a power supply circuit in equipment that
could result in damage the meter and the equipment
under test.
!
Hazardous voltage
Risk of danger. Important information. See manual
DC (Direct Current)
Double insulated
Low Battery
Earth ground
AC (Alternating Current)
Conforms to EU directives
Do not discard this product or throw away.
Electrical Symbols
Fuse
CAT III
CAT IV
IEC Overvoltage Category
CAT III equipment is designed to protect against transients
in equipment in fixed equipment installations, such as
distribution panels, feeders and short branch circuits, and
lighting systems in large buildings.
CAT IV equipment is designed to protect against transients
from the primary supply level, such as an electricity meter
or an overhead or undergroundutility service.
501 / 502 EN
2
Front panel illustration :
1. Auto backlight sense point
2. 40,000 count dual display
3. Push buttons
4. Rotary switch
5. Input terminal for voltage, frequency, resistance,
continuity, diode, capacitance and temperature
measurements.
6. Return terminal for all measurements.
7. Input terminal for 0 to 400mA current
measurements.
8. Input terminal for 0 to 10A current measurements.
The Meter Description
Meter error. Have meter serviced.
Error Message
ProbE
FUSE
Er
Test probe alert. Displayed when the test probes are in the
A or mA terminal and the selected rotary switch position
does not correspond to the terminalbeing used.
Fuse broke. Replace fuse as soon.
1
2
3
4
5
6
7
8
501 / 502 EN
3
Power On Options
ENTER
A HOLD
Display the firmware version.
Display all LCD segments.
Select measurement function.
Select measurement range.
Press > 1 sec to enter auto range mode.
Enable/Disable the High Frequency Reject mode in the
AC measurements.
Enter menu function in pointer positon.
Enable the Peak-Hold mode in the AC or DC
measurements.
In this mode, press button to select Peak-Hold MAX
or MIN. Press > 1 sec to disable the Peak-Hold mode.
Select degrees Celsius or degrees Fahrenheit.
Enable/Disable the Auto-Hold mode.
Push Buttons
Cancel current menu function.
°C / °F
Enable/Disable the Hz mode in the AC measure-ments.
Function
(Yellow)
RANGE
HFR
A-HOLD
P-HOLD
ENTER
CANCEL
Hz
When turn the power on, press the function button to
execute the below options.
Power On Options
Making Basic Measurements
Warning
!
• When connecting the test leads to the DUT (Device
Under Test), connect the common test lead before
connecting the live lead. When removing the test leads,
remove the test live lead before removing the common
test lead.
The following sections describe how to take measure-
ments with the meter.
501 / 502 EN
4
Measuring AC and DC Voltage
This meter have true rms readings, which are accurate
for distorted sine waves and other waveforms (with no
dc offset) such as square waves, triangle waves, and
staircase waves.
The ranges of measuring voltage are 40mV, 400mV,
4V, 40V, 400V and 1000V. To select the mV range,
turn the rotary switch to mV position.
AC Voltage DC Voltage
For best accuracy when measuring the DCmV, touch
the probe tips together and read the DC offset. If
necessary, you can use the relative (Δ) mode to
automatically subtract this value.
Make dB measurement
The meter is capable of displaying voltage as a dB
value, either relative to 1 milliwatt (dBm), a reference
voltage of 1 volt (dB). A dBm measurement must use a
reference impedance (600Ω) to calculate a dB value
based on 1 milliwatt. A dB measurement uses a 1 volt
reference voltage to compare the present measure-
ment against. Define as below :
501 / 502 EN
5
To use dB or dBm function, turn the rotary switch to
ACV or ACmV position. Then move the blink cursor of
menu to dB or dBm position, and press the ENTER
button to enter function. Press the CANCEL button to
exit function.
Measuring Voltage in LoZ Mode
• Do not use the LoZ mode to measure voltages in
circuits that could be damaged by this mode’s low
impedance.
CAUTION
!
To eliminate ghost voltages, the meter’s LoZ mode
presents a low impedance across the leads to obtain a
more accurate measurement. The ranges of measuring
LoZ voltage are 400V and 1000V. In this mode, meter
will automatic measure input signal which is AC or DC
and determine range.
To use the LoZ mode, turn the rotary switch to LoZ
position.
501 / 502 EN
6
Measuring AC and DC Current
• Always use proper terminals, switch position, and
range for measurements.
• To avoid possible electric shock or personal injury,
never attempt an in-circuit current measurement where
the open circuit potential to earth is greater than
1000V.
• Only replace the blown fuse with the proper rating as
specified in this manual.
WARNING
!
• Replace the fuse as soon as the indicator (FUSE)
appears.
To measure current, you must break the circuit under
test, then place the meter in series with the circuit.
The ranges of measuring current are 40mA, 400mA,
4A and 10A. AC current is displayed as an rms value.
Insert the black lead into the COM terminal. For
currents less than 400 mA, insert the red lead into the
mA terminal. For currents above 400 mA, insert the red
lead into the A terminal.
You can press the function (yellow) button to select
current measurement function.
CAUTION
!
501 / 502 EN
7
Measuring Frequency
The meter measures the frequency of a voltage or
current signal by counting the number of times the
signal crosses a threshold level each second.
This function only can be operated in AC voltage and
current measurements. The ranges of measuring
frequency are 400Hz, 4kHz, 40kHz and 100kHz.
If a reading shows as 0 Hz or is unstable, the input
signal may be below or near the trigger level. The
detail of frequency trigger level refer to the electrical
specifications.
To use the frequency function, press function (yellow)
button to select measurement function.
Make High Frequency Rejection
Measurement
• Do not use the High Frequency Rejection (Low Pass
Filter) option to verify the presence of hazardous
voltages. Voltages greater than what is indicated may
be present. First, make a voltage measurement without
the filter to detect the possible presence of hazardous
voltage. Then select the filter function.
Warning
!
The High Frequency Rejection mode equip a low pass
filter in the AC measurements. The cut-off frequency
(-3dB point) of low pass filter is 800Hz.
To use the HFR mode, press the HFR button to equip
a low pass filter in the AC measurements.
501 / 502 EN
8
Make Peak-Hold Measurement
The Peak-Hold mode records wave peak maximum
and minimum input values. Response time of
Peak-Hold is 10us.
To use the Peak-Hold mode, press the P-HOLD button
to enable the Peak-Hold mode in the AC or DC
measurements.
In this mode, press P-HOLD button to select peak MAX
or MIN value. Press > 1 sec to disable the Peak-Hold
mode.
For square wave, use the peak-hold mode in the DC
measurements.
Make AC+DC Measurement
When input signal is ac and dc combinations:
AC over DC or DC over AC, the meter is capable of
displaying one AC+DC (rms) value combined.
Define as below :
To use the AC+DC function, turn rotary switch stop
in DCV, DCmV or A position, then press function
(yellow) button to select measurement function.
501 / 502 EN
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