Renogy RNG-TOOL-MM User manual

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RENOGY Multimeter
RNG-TOOL-MM
Palm Size Digital Multimeter
2775 E. Philadelphia St., Ontario, CA 91761
1-800-330-8678 Version 1.0

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Important Safety Instructions
Please save these instructions.
This manual contains important safety, and operating instructions for the Multimeter. The
following symbols are used throughout the manual to indicate potentially dangerous
conditions or important safety information.
WARNING: Indicates a potentially dangerous condition. Use extreme caution when
performing this task.
CAUTION: Indicates a critical procedure for safe and proper operation of the Multimeter
NOTE: Indicates a procedure or function that is important to the safe and proper operation
of the Multimeter.
To avoid possible electric shock, personal injury, or death, read the safety instruction before using
the meter.
 Use the meter only as specified in this manual, or the protection provided by the
meter might be impaired or lost.
 Inspect the meter before using it. Do NOT use the meter if it appears damaged.
 Inspect the test leads before use. Do NOT use them if insulation is damaged or
metal is exposed.
 Keep your fingers behind the finger guards when using the test leads.
 Do NOT apply more than 500V voltage between meter terminal and earth ground,
preventing electric shock and meter damage.
 Be cautious when the tested voltage is above 60VDC or 42Vrms AC. These
voltages pose a shock hazard.
 Remove test leads from the meter before opening the case
 NEVER remove the cover or open the case of the meter without first removing it
from the main power source.
 NEVER use the meter with the cover removed or the case open.
 Do NOT apply more than the rated voltage or current.

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 NEVER switch range positions during testing.
 Do NOT test the voltage when it’s on amperage testing positions.
 Only use fast burning fuses with same nominal rating to replace the open fuse.
 Do NOT change the internal wire connections. It will damage the meter and pose
hazard.
 When there is a “ 1 “ symbol on the LCD display, replace the battery in time to
keep the measurements accurate.
 Do NOT use the meter under high temperature or in the wet environment,
especially NOT store the meter in the wet environment, which might impair its
functions.
 For maintenance, use damp cloth and gentle detergent to clean the case. Do NOT
use solvent or abrasive.

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Table of Contents
General Information ................................................................................................................................................4
Electrical Symbols ..............................................................................................................................................4
General Specifications .....................................................................................................................................4
Identification of Parts ............................................................................................................................................5
Operation ........................................................................................................................................................................6
DC voltage measurement...............................................................................................................................6
AC voltage measurement...............................................................................................................................7
DC current measurement ...............................................................................................................................7
Resistance measurement ..............................................................................................................................8
Diode measurement ...........................................................................................................................................9
Battery measurement .................................................................................................................................... 10
Technical Specifications .................................................................................................................................. 10
DC voltage ............................................................................................................................................................. 10
AC voltage ............................................................................................................................................................. 11
DC current .............................................................................................................................................................. 11
Resistance ............................................................................................................................................................. 11
Battery measurement .................................................................................................................................... 11
Diode Test .............................................................................................................................................................. 12
Battery Replacement ........................................................................................................................................... 12
Maintenance .............................................................................................................................................................. 13

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General Information
The RENOGY Digital Multimeter features high reliability and safety, complete functions,
and handheld. The synchronous display function with ultra-large screen, digital and high-
resolution analog pointer, full range overload protection, and unique appearance design
let it become a new generation of practical electrician’s measuring instrument with
excellent performance.
Electrical Symbols
Low battery capacity Earth ground
AC DC
Double Insulated Fuse
AC or DC
Important Safety Info
Diode
General Specifications
Maximum input voltage
(between terminals and earth ground) 500Vrms
“10A” JACK No fuse
Fuse for mA JACK Φ5x20-F 315mA/250v
Range selection
Manually
Backlight
Manually turn on & turn off
Maximum display 1999, update 2-3 times per second
Polarity indication Auto display “-“ for negative
Over range indication
Display “1” on the LCD
Hold measurement data Display on the top left corner of LCD
Low battery capacity Display icon on the LCD
Battery 9V NEDA1604 or 6F22 or 006P
Operation temperature 0℃-40℃ (32°F-104°F)
Storage temperature -10℃-50℃ (14°F-122°F)
Dimension
130 x 73.5 x 35mm (5.12 x 2.89 x 1.38in)
Weight
156g (0.34lbs) including the battery

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Identification of Parts
Key Parts
1. LCD Display (1.9 inch)
2. Hold measurement data button—freeze the present reading in the display
3. Backlight button
4. Function and range switch—select the functions and desired ranges as well as to
turn ON/OFF the meter
5. “COM” JACK—return terminal for all measurements, plug in connector for black
(negative) test lead
6. “10A” JACK— Input for 200mA to 10A current. Plug in the red (positive) test lead.
7. “VΩmA” JACK—Input for voltage, resistance and current (up to 200mA). Plug in the
red (positive) test load.

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Operation
Always check the battery before any measurements. Set the function and range switch
on the desired range, the icon appears on the LCD when the battery capacity is low.
Also, pay attention to the icon besides the JACK for test leads. It indicates the
maximum rating. Don’t apply measurements more than that.
DC voltage measurement
1. Connect the red test lead to the “VΩmA” jack and the black test lead to the
“COM” jack.
2. Set the range switch to the desired DC voltage range (V ).
3. Connect the test leads across the device or circuit to be measured. Read the
voltage value on the LCD display along with the polarity.
Measure voltage
WARNING: Do NOT test more than 500V voltage, which might damage the internal
circuit and harm your safety. If the actual voltage to be tested is unknown before
measurements, you should firstly set the meter at the highest range, and then
gradually lower the range according to the reading. If the LCD only display “1”, it
means the measured value exceeds the current range, you have to level up the
range.
In each range, the input impedance is 10MΩ. Such load effect will result in
measurement error when measuring the high impedance circuit. While if the

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impedance of measured circuit was smaller than 10MΩ, the measurement error
would be so tiny that could be neglected (0.1% or even smaller).
AC voltage measurement
1. Connect the red test lead to the “VΩmA” jack and the black test lead to the
“COM” jack.
2. Set the range switch to the desired AC voltage range (V~).
3. Connect the test leads across the device or circuit to be measured. Read the
voltage value on the LCD display along with the polarity.
The measurement diagram and WARNING information are both the same as DC voltage
measurement.
DC current measurement
1. Connect the red test lead to the “VΩmA” jack or “10A” jack, and the black test
lead to the “COM” jack.
2. Set the range switch to the desired DC current range (A ).
3. Open the circuit in which the current is to be measured, and connect the test
leads in series with the circuit.
4. Read the current value on the LCD display along with the polarity.
Measure current

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WARNING: Even the meter has over voltage protection for measuring current up to
200mA, do NOT try to measure DC current when the voltage between input terminal
and the earth ground is above 60V. Doing so might damage the meter or the
equipment under test, and harm your safety. Such high voltage has the risk of
electric shock.
Cut off the power supply before measurement, carefully check the input terminal
and range, make sure they are in the correct position. Then reconnect the circuit
and measure the current. If the actual current to be tested is unknown before
measurements, you should firstly set the meter at the highest range, and then
gradually lower the range according to the reading.
For the mA input jack, overload will open the built-in fuse. You must replace the
fuse for future operation.
Dimension of fuse: Φ5x20mm; Electrical specs: F 315mA/250v
There is no fuse for “10A” jack. To use safely, each measurement cannot last for
more than 10 seconds, and the interval between each measurement must be more
than 15 minutes.
Resistance measurement
1. Connect the red test lead to the “VΩmA” jack and the black test lead to the
“COM” jack.
2. Set the range switch to the desired resistance range (Ω).
3. Connect the test leads across the resistor to be measured and read the
resistance value on the LCD display.
Measure resistance

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CAUTION: If the resister to be measured is connected to a circuit, to avoid damage to the
meter or to the equipment under test, disconnect circuit power and discharge all
capacitors before measuring resistance.
When measuring resistance at 200Ω range, the wires of test leads will add 0.1 Ω ~ 0.3 Ω of
measurement error. To achieve accurate measurement, you may reduce the reading by the
resistance of the leads. To test the leads, touch the probe tips together and read the
resistance of the leads.
When the resistance to be measured was above 1MΩ, it would take several seconds for
the meter to get a stable reading. This is a normal phenomenon.
Diode measurement
1. Connect the red test lead to the “VΩmA” jack and the black test lead to the
“COM” jack.
2. Set the range switch to the desired diode range ( ).
3. Connect the red test lead to the anode of the diode to be tested and the black
test lead to the cathode of the diode.
4. Read the value on the LCD display.
Measure diode
CAUTION: If the diode to be measured is connected to a circuit, to avoid damage to the
meter or to the equipment under test, disconnect circuit power and discharge all
capacitors before measuring diodes.
You could use the diode range to test the voltage drop of diodes or other semiconductor
junction. A typical junction has forward voltage drop from 0.5V to 0.8V. If the connection
is reversed (open circuit), only figure “1” will be displayed on the LCD.