R5050
TRMS AC/DC
Clamp Meter
Instruction
Manual
Model
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Table of Contents
Safety ............................................................................................ 3
Features .........................................................................................4
Specications .............................................................................4-6
Instrument Description .................................................................. 7
Display Description ....................................................................... 7
Operating Instructions ................................................................... 8
Data Hold Function .................................................................................. 8
Peak Hold Function .................................................................................. 8
MAX/MIN Function ................................................................................... 8
REL Function ........................................................................................... 8
Measurement Procedures ........................................................9-12
Current Measurement .............................................................................. 9
ACA ...................................................................................................... 9
DCA ...................................................................................................... 9
Voltage measurement ............................................................................ 10
Resistance measurement ....................................................................... 10
Continuity Test ....................................................................................... 11
Diode Test .............................................................................................. 11
Frequency measurement from the terminals ........................................... 12
Frequency measurement with the clamp ................................................ 12
Battery Replacement ................................................................... 13
Product Maintenance .................................................................. 13
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Safety
•
Read this manual before using the meter and follow all safety guidelines.
• Use the meter only as specied in this instruction manual. Otherwise
the meters protection may be impaired.
•
Never use this meter on a circuit with voltages greater than 750Vrms @ 50/60 Hz.
• Do not operate the meter if the body or test leads look damaged.
• Check the function selector range switch and make sure it is at the
correct position before each measurement is taken.
• Do not perform resistance and continuity tests on a live circuit.
• Exercise extreme caution when measuring live systems with voltages
greater than 60VCC or 30VCA.
• Use extreme care when working around bus bars and bare conductors.
• Do not use the meter in over range/overload conditions (OL).
•
Change the battery when the symbol appears to avoid incorrect readings.
Environmental Conditions
Altitude up to 2000 meters.
Operating Temperature: 0°C to 40°C, <80% RH, non-condensing
Storage Temperature: -10°C to 60°C, <70% RH, battery removed
Pollution Degree: 2
Symbols
Attention! Refer to operation instructions.
Dangerous voltage may be present at terminals.
This instrument has double insulation.
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Features
• Measures AC/DC current/voltage, resistance and frequency
• 4000-count LCD display with analog bargraph
• Low battery and overrange indicators
• True RMS measurements
• Min/Max, display hold, peak hold and relative mode
• Diode test and continuity check functions
• Cat. III 600V, Cat. II 1000V safety rating
• Includes test leads, battery and soft carrying case
Specifications
Digital Display: 3 3/4 digits LCD display with maximum reading 3999
Analog Display: Fast 40 segment analog bar graph display
Symbol &
Scale Range: Automatic display according symbols
and range input signal
Polarity: is displayed when negative signal applied to
the input
Over Load:
Sample Rate: 2 times/sec for digital data; 20 times/sec for
analog bar
Low Battery Indication:
required voltage
Auto Power Off: By default, the meter is in auto power off mode.
The meter will power itself off after 30 minutes
without operation. To disable the auto power
off, press and hold the MAX/MIN button and
turn the meter on.
Jaw Opening: 40mm
Power Supply: 9V, NEDA1604 or 6F22 or 006P
Battery Life: 40 hours typically (Alkaline)
Dimensions: 9.53 x 2.60 x1.4" (242 x 66 x 36 mm)
is displayed when input signal exceeds range
is displayed when the battery is below the
continued ...
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Weight: 400g (14.10 oz) with battery
Optional Accessories: Line Splitter (R5400)
Thermocouple Adapter (R2990)
Soft Carrying Case (CA-05A)
Hard Shell Carrying Case (R9940)
Safety Test Lead Set (R1000)
Fused Test Lead Set (R1020)
Electrical Specifications
The accuracy specication is dened as ± (…% of reading+ …count) at
23±5°C,
TRMS for ACV and ACA accuracy are specied from 5% to 100% of the
range. For the accuracy add ±(1% of reading) on Crest Factor 1.4<CF<3
at full scale & CF<6 at half scale.
ACA
DCA
ACV (Autorange)
<
80%RH
=
Range Resolution Accuracy Overload Protection
40A 0.01A
1000A 1A
50 ~ 60Hz
± (1.9% rdg +
5 digits)
60 ~ 500Hz
±(2.5% rdg +
5 digits )
1200Arms400A 0.1A
Range Resolution Accuracy Overload Protection
40A 0.01A
± (2.5% reading + 10 digits) 1200Arms400A 0.1A
1000A 1A
Range Resolution Accuracy Overload Protection
400V 0.1V
750V 1V
± (1.5% reading + 5 digits)
50 ~ 500Hz
1000Vrms
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DCV (Autorange)
Range Resolution Accuracy Overload Protection
400V 0.1V
1000V 1V
± (1% reading + 2 digits) 1000Vrms
Ohm (Resistance) (Autorange)
Range Resolution Accuracy Overload Protection
400Ω 0.1Ω
4000Ω 1Ω
± (1% reading + 2 digits) 600Vrms
(Diode)
Range Test Current Open Circuit Voltage Overload Protection
1.7mA Max. 6V Max. 600Vrms
Continuity
Range Active Region Overload Protection
<100Ω 600Vrms
Frequency (Hz) (Autorange)
Function Range Resolution Sensitivity Accuracy
A-Hz
V-Hz
4KHz 1Hz 2Arms
10KHz 10Hz 5Arms
4KHz 1Hz 5Vrms
10KHz 10Hz 10Vrms
±(0.1% reading +
1 digits) (20~10KHz)
±(0.1% reading +
1 digits) (10~10KHz)
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Instrument Description
1. Current Sensing Clamp
2. Clamp opening handle
3. Function select dial
4. Hold Button
5. Peak Hold Button
6. Maximum Minimum Button
7. AC/DC Select Button
8. Relative Button
9. LCD Display
10. "COM" Terminal
11. " + " Test Terminal
Display Description
Positive Peak detect indication
Relative indication
Alternative
Auto Power Off indication
Continuity with beeper
Diode function indication
Negative Peak detect indication
Data Hold indication
Manual range indication
Resistance
measurement indication
Frequency
measurement indication
Direct Source indication
Low battery indication
Polarity indication
Analog Bar display
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Voltage & Current
measurement
indication
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Operating Instructions
Data Hold Function
Press the HOLD button at any time to hold the current reading. To release
the data being held, simply press the HOLD button again.
Peak Hold Function
This meter is designed with 1ms peak hold function at ACA, ACV, DCA
and DCV ranges. Before performing a peak hold operation, a calibration
process must be completed rst.
To do this, press and hold the PEAK button for 2 seconds. "CAL" will
display on the LCD and the offset will be calculated and kept in the meter.
After the calibration is complete, you can choose P+ or P- by pressing
the PEAK + HOLD buttons to keep the peak reading. To return the meter
back to normal operation, press the PEAK button for 2 seconds.
When the function range changes, the meter will require another
calibration for peak measurement.
MAX/MIN Function
This meter is designed with a MAX/MIN function at ACA, ACV, DCA and
DCV ranges.
Press the MAX/MIN button once to set the meter to the MAX mode.
Press it once again to set the meter to MIN mode. Press it once again and
the meter will display the present reading and will continue tracking the
MAX and MIN changes. This mode will also be indicated with the blinking
"MAX/MIN" symbol.
Set the meter back to normal operation by pressing the MAX/MIN button
for more than 2 seconds.
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REL Function
This meter is designed with REL function at ACA, ACV and DCV, DCA ranges.
Press the REL button to change the zero to the current reading and the
relative value will show on the LCD. Press it once again and the meter
will display the relative zero point. This mode will also be indicated with a
blinking REL symbol.
Set the meter back to normal operation by pressing the REL button for
more than 2 seconds.
Measurement Procedures
Current Measurement
Switch the main function selector to proper current range.
ACA
Open the clamp by pressing the jaw-opening handle and insert the cable
to be measured into the jaw. Choose AC current measurement by
pressing the AC/DC button for ACA readings.
DCA
To measure DC current, choose
DC measurement by pressing
the AC/DC button. Wait for the
reading to stabilize then press the
REL button to reset the reading.
Once completed, insert the cable
to be measured into the jaw and
read the value.
Note: Before taking this measurement, disconnect the test
leads from the meter for safety.
If the reading is difcult to read,
push the HOLD
button and read the
result later.
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Voltage measurement
Switch the main function selector to Voltage Range. Connect the Red test
lead to the "+" terminal and the Black one to the "COM" terminal. Choose
AC or DC by pressing the AC/DC button. Measure the voltage by touching
the test lead tips to the test circuit where the value of voltage is needed.
Read the result on the LCD panel.
Resistance measurement
Switch the main function to the "Ω" range,
verify that the power line is disconnected from
the system. Connect the Red test lead to the
"+" terminal and the Black one to the "COM"
terminal. Connect the tips of the test leads to
the points where the value of the resistance is
needed. Read the result on the LCD panel.
Note: When measuring the resistance value of
a circuit system, make sure the power is off
and all capacitors required are discharged.
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Continuity Test
Switch the main function to
the "
that the power line is
disconnected from the
system. Connect the Red
test lead to the "+" terminal
and the Black one to the
"COM" terminal. Connect
the tips of the test lead to
the points where the value of
the conduction condition
is needed. If the resistance
is under 100Ω, the beeper
will sound continuously.
" range, verify
Short circuit
Diode Test
Switch the main function to the
"
" range, verify that the
power line is disconnected from the
system. Connect the Red test lead to
"+" terminal and the Black one to the
"COM" terminal. Connect the tips of
the Red test lead to the anode side and
the Black test lead to the cathode side
of the diode being tested. Read the
forward Voltage (Vf) value on the
LCD panel.
If the polarity of test leads are reversed
with diode polarity, the digital
reading will show "OL". This can be
used for distinguishing between anode
and cathode terminals of a diode.
Beeper
Open circuit
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Frequency measurement from
the terminals
Switch the main function to the "Hz"
range. Connect the Red test lead to the
"+" terminal and the Black one to the
"COM". Connect the tips of the test
leads to the points where the frequency
of the voltage signal is required. Read
the value one the LCD panel.
Frequency measurement with
the clamp
Switch the main function to the "Hz"
range. Open the clamp by pressing
the clamp-opening handle and insert
the cable to be measured into the
clamp. Close the clamp and you will
nd the reading on the LCD panel.
Note: When taking frequency
measurements, you should either use
the terminal signal or clamp signal
but not both. If both sources are
applied an error reading will occur.
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Battery Replacement
1) When the battery voltage drops below the proper operation range the
symbol will appear on the LCD display, indicating that the battery
needs to be changed.
2) Before changing the battery, switch the main function to "OFF" and
disconnect the test leads.
3) Open the back cover using a screwdriver.
4) Replace the old battery with a new 9V battery.
5) Close the back cover and fasten the screws using a screwdriver.
Product Maintenance
WARNING!
Before opening the meter, disconnect both test leads and never use
the meter before the cover has been reinstalled and fastened.
To avoid contamination or static damage, do not touch the circuit
board without proper static protection.
Notes:
•
If the meter is not going to be used for a long time, take out the battery and
do not store the meter in high temperature or high humidity environment.
• When taking current measurements, keep the cable at the center of the
clamp to yield a more accurate test result.
• Repairs or servicing not covered in this manual should be performed
only by qualied personal.
• To clean the meter, periodically wipe the case with a dry cloth. Do not
use abrasives or solvents on these instruments.
For service on this or any other REED product or information on other
REED products, contact REED Instruments at info@reedinstruments.com.
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