mercury CMTS01 Smart Digital Multimeter User Manual
- May 15, 2024
- Mercury
Table of Contents
Item ref: 600.113UK
CMTS01
Smart Digital Multimeter
User Manual
CMTS01 Smart Digital Multimeter
Please read this manual thoroughly and ensure all contents are fully
understood before using the apparatus.
Warning
To avoid possible electric shock or personal injury, and to avoid possible
damage to the tester or to the equipment under test, adhere to these following
rules:
- Before using the tester inspect the case. Do not use the tester if it is damaged or the case (or part of the case) is removed. Look for cracks or missing plastic. Pay attention to the insulation around the connectors.
- Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity.
- Do not apply more than the rated voltage, as marked on the tester, between the terminals or between any terminal and grounding.
- When the tester is working at an effective voltage over 60V in DC or 30Vrms in AC, special care should be taken for there is danger of electric shock.
- Always use the proper terminals and function for your measurements.
- Do not use or store the tester in an environment of high temperature, humidity, explosive, flammable, damp or of a strong magnetic field. The performance of the tester may deteriorate after being exposed to any of these elements.
- When using the test leads, keep your fingers behind the finger guards.
- Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes.
- Replace the battery as soon as the low battery indicator appears. With a low battery, the meter may produce false readings that can lead to electric shock and personal injury.
- Remove the connection between the testing leads and the circuit being tested and turn the meter power off before opening the meter case.
- The internal circuit of the meter shall not be altered at will to avoid damage of the meter and any accident.
- A soft cloth and mild detergent should be used to clean the surface of the tester on a regular basis. No abrasive and solvent should be used to prevent the surface of the tester from corrosion or damage.
- The tester is suitable for indoor use only.
- Turn the tester power off when it is not in use and take out the battery when not using for a long time. Check the battery regularly; replace the battery immediately if any signs of leaking appear. Battery acid will damage the tester.
Electrical & LCD Symbols
| Safety warning| ****| High voltage warning
---|---|---|---
| Grounding Conductor| 
| Double insulation
| EU Safety Certification| | Battery low voltage
| Live line judgment| | AC signal
| DC signal| | AC & DC signal
| Auto range| | Electromagnetic field
| Non – contact voltage| | Continuous test
| Auto power off symbol| | Diode test
| Capacitance test| | Power switch
General Specifications
Display: LCD, 6000 counts updates 2/sec
LCD Size: 35 x 25mm
Polarity Indication: “-” displayed automatically
Over-range Indication: “OL” displayed
Low Battery Indication: “ ” displayed
Range select: auto or manual
Operation Temperature: 0°C to 40°C, less than 80%RH
Storage Temperature: -10°C to 50°C, less than 85%RH
Battery Type: 1.5V x 2, AAA size
Jaw Size: 30mm
Dimension(H×W×D): 187×65×24mm
Weight: Approx 50g with battery
Technical Specifications
Accuracy is guaranteed for 1 year 23°C±5°C less than 80%RH
DC Voltage
| RANGE | RESOLUTION | ACCURACY |
|---|---|---|
| 500mV | 0.1mV | ±(0.8% of rdg + 5 digits) |
| 6V | 1mV | ±(0.8% of rdg + 3 digits) |
| 60V | 10mV | |
| 600V | 1V | ±(1.0% of rdg + 5 digits) |
Note: Voltages below 500mV cannot be accurately measured
Input Impedance: 10MΩ
Overload Protection: 600V DC or 600AC rms
Max. Input voltage: 600V DC
AC Voltage (auto ranging)
| RANGE | RESOLUTION | ACCURACY |
|---|---|---|
| 500mV | 0.1mV | ±(1.2% of rdg + 8 digits) |
| 6V | 1mV | ±(1.0% of rdg + 8 digits) |
| 60V | 10mv | |
| 600V | 1V | ±(1.2% of rdg + 8 digits) |
Note: Voltages below 500mV cannot be accurately measured.
Input Impedance: 10MΩ
Frequency Range: 40Hz~400Hz
Overload Protection: 600V DC or 600V AC rms
Response: Average, calibrated in rms of sine wave
Max. Input voltage: 600V AC rms
AC Current
| RANGE | RESOLUTION | ACCURACY |
|---|---|---|
| 0.3A | 10mA | ±(2.0% of rdg + 10 digits) |
| 2A | 10mA | |
| 20A | 10mA | ±(3.0% of rdg + 5 digits) |
| 200A | 100mA | |
| 600A | 1A |
Measuring voltage drop: 200mV
Frequency Range: 40 to 200Hz
Note: As the lowest calibration point is set to 10A, the accuracy
measurement below 20A is only for reference, and the accuracy below 03A cannot
be measured.
Resistance (auto ranging)
| RANGE | RESOLUTION | ACCURACY |
|---|---|---|
| 60Ω | 0.001Ω | ±(1.5% of rdg + 5 digits) |
| 60Ω | 0.01Ω | |
| 600Ω | 0.1Ω | |
| 6kΩ | 1Ω | |
| 60kΩ | 100Ω | |
| 6MΩ | 1kΩ | |
| 60MΩ | 10kΩ |
Open Circuit Voltage: about 0.25V
Overload Protection: 250V DC/AC rms
Diode and Continuity
| RANGE | INTRODUCTION | REMARK |
|---|---|---|
| The approx. forward voltage drop will be displayed | Open circuit Voltage: |
about 3V
| The built-in buzzer will sound if the resistance is less than about 30Ω|
Open circuit Voltage: about 3V
Overload protection: 250V DC/AC rms
For continuity test: When the resistance is between 30Ω and 100Ω, the buzzer
may sound or may not sound. When the resistance is more than 100Ω, the buzzer
won’t sound.
Frequency
| RANGE | ACCURACY |
|---|---|
| 0~10KHz (clamp) | ±(1.5% of rdg + 5 digits) |
Overload Protection: 250V DC/AC rms
Capacitance
| RANGE | ACCURACY |
|---|
6nF/60nF/600nF/6uF
60uF/60mF (15Sec)| ±(5.0% of rdg + 8 digits)
Overload Protection: 250V DC/AC rms
Operating Instructions
Turning on and off meter: Press and hold the power button to turn on the
meter, the meter will beep, and the LCD will display **Auto** symbol,
indicating that the meter has entered the test state of automatically
identifying the type of the measured signal. The AUTO symbol displayed on the
top of the LCD means that the measured signal is in the auto range measurement
mode.
Automatic Identify Mode
Insert the black lead into the COM jack and the red lead into the INPUT jack.
The meter can auto identify whether the measured signal is voltage or
resistance. The red lead should be connected to the positive pole of the
measured signal, otherwise the negative polarity symbol will appear. If the
measured voltage signal is less than 500mV AC/DC, the meter cannot identify.
If there is AC current flowing through the measured wire of the meter clamp,
the meter will enter the state of auto current measurement, and the current
measurement is the mode of auto range.
Voltage & Resistance Measurement
When the meter identifies the signal as voltage, the meter can auto identify
the AC or DC voltage signal. During measurement, the LCD directly displays the
voltage reading, and the red lead indicates the polarity of the DC voltage
signal. When the meter identifies the AC voltage signal, the LCD directly
displays the reading of AC voltage and displays the symbol of AC voltage. When
the meter identifies the signal as resistance, the LCD displays the reading of
resistance. When the test resistance is less than 50Ω, the meter will emit a
beep, indicating that the circuit under test is in short circuit state. When
the measured voltage exceeds 600V, the meter will issue a warning sound, and
the LCD displays the over range status OL.
Current Measurement
During AC current measurement, ensure that the wire under test is in
working condition. Please open the trigger of the clamp head and clamp only
one wire also try to make the wire perpendicular to the center of the clamp
head to get a more accurate value. The reading on the display is the value of
the AC current flowing through the conductor. Note: When more than two wires
are clamped, the measurement will not be carried out normally. In general
there are many wires in the cable, so the meter needs to find the separated
wire to the terminal for measurement.
Manual Selection of Functions
Press the SELECT button to enter the manual testing state, press this button
successively, and the meter will enter the test state of NCV (noncontact
voltage), capacitance and frequency. The LCD will display the corresponding
function symbol identifier. Press this button again to enter the state of
smart identification of test signal. Note: Resistance and voltage can only be
tested in smart identification state.
Manual Testing Tips
Under the above conditions, you need to carefully determine the type of
input model, select the correct measurement function on the meter, and connect
the lead to the object to be measured in parallel. The reading displayed on
the meter is the reading of the input signal.
Continuity Test
In manual function selection mode, the meter will beep when the test
resistance is less than 50Ω，At the same time, the light on the meter will be
continuously lit.
Capacitance Measurement
Press the SELECT button repeatedly to choose the capacitance function and the
LCD will display nF icon. Connect the black test lead to the “COM” jack and
the red to the “INPUT” jack. Connect test leads across the capacitor to
measure and be sure the polarity of the connection is observed.
Note: When the capacitance under measurement is above 100uF, the meter
needs at least 10 seconds to display a stable reading.
NCV (Non-Contact-Voltage) Test
In Auto mode press the SELECT button repeatedly to select NCV function, the
LCD will display EF only. “NCV” means “non-contact voltage detection” without
the use of test leads. Use the orange probe on top of the meter jaws to test
the target. When an AC voltage of 30~1000V is detected, the meter will make a
continuous sound, and the LCD will display the number of bars to indicate the
voltage intensity.
**Frequency Measurement
**
In AUTO mode, press the SELECT button repeatedly to select the Frequency
function and the LCD will display Hz only. Connect the black test lead to the
“COM” jack and the red to the “INPUT” jack. Connect test leads to the signal
carrier to be measured in parallel and the meter will then display the
frequency.
Back Light and Hold Functions
Press the button for more than one second to enter the LCD screen backlight
mode. Repeat the process to turn off the backlight function. A short press of
the same button will hold the current reading on the LCD screen for recording
etc. Only when you short press the button again can the meter be used for a
new measurement function.
Auto Power Off (APO) Function
The meter is fitted with an APO function to save battery wastage. This
function will switch off the meter after around 15 minutes of inactivity.
Battery Replacement
The symbol on the display indicates the batteries are running low and need
replacing. Remove the small screw on the bottom of the battery cover and
replace the 2 AAA batteries, ensuring you have the correct polarity for each
battery. Replace the cover and screw to secure the unit.
Accessories
- Remote cable test unit
- Set of test leads (red and black)
- 2pcs AAA batteries
- Instruction manual
EN61010–1:2010
**** This product is classed as Electrical or Electronic equipment and
should not be disposed with other household or commercial waste at the end of
its useful life. The goods must be disposed of according to your local council
guidelines.
Errors and omissions excepted.
Copyright© 2023 AVSL Group Ltd, Unit 2 Bridgewater Park,
Taylor Road, Trafford Park, Manchester. M41 7JQ.
AVSL (Europe) Ltd, Unit 3D North Point House,
North Point Bus. Park, New Mallow Road, Cork, Ireland.
www.avsl.com
600.113UK
Documents / Resources
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mercury CMTS01 Smart Digital
Multimeter
[pdf] User Manual
CMTS01 Smart Digital Multimeter, CMTS01, Smart Digital Multimeter, Digital
Multimeter
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