ROSH SMART DIGITAL MULTIMETER User Manual

ROSH SMART DIGITAL MULTIMETER

CAUTION
Before using the instrument, please read this manual lD carefully. and save ii well for future using,

Safety statement

caution,
Operation that may cause damage to meter or equipment.
“Warning”:
operation that may cause danger to users.

Safety Instructions
The meter conforms to IEC61010-1 CAT.Ill 600V overvoltage safety standard and pollution level 2.

Safety specification
warning
To avoid possible electric shock or personal injury, please observe the following specifications:

• Please read this manual carefully and pay special attention to safety warning information before using the meter.
• Operate the meter according to the manual, otherwise the protection function provided by the instrument may be damaged or weakened.
• Take special care when measuring values that exceed 60VDC, 30vac RMS, or 42V. This kind of voltage has the danger of electric shock.
• Do not measure voltage higher than the rated value between terminals or between terminals and ground.
• Measure the known voltage to check whether the meter works normally. If it is not normal or damaged, please do not use it again.
• Before using the meter, please check whether there are cracks or damaged plastic parts in the instrument shell. If so, please do not use it again.
• Before using the meter, please check whether the probe is cracked or damaged. If so, please replace the probe with the same model and the same electrical specification.
• Please use the meter according to the measurement category, voltage or current rating specified in the meter or manual.
• Please observe local and national safety regulations. Wear personal protective equipment (such as approved rubber gloves, masks and flame retardant clothing, etc.) to prevent injury caused by electric shock and electric arc when dangerous live conductors are exposed.
• When the “a” symbol is displayed on the meter, please replace the battery in time to prevent measurement error.
• Do not use the meter in the environment with explosive gas or steam or humid environment.
• When using the probe, please hold your fingers behind the probe finger guard.
• When measuring, please connect the null or ground wire first, then the live wire; when disconnected, please disconnect the live wire first, and then the null or ground wire.
• Remove the probe from the meter before opening the case or battery cover. Do not use the meter when the meter is disassembled or the battery cover is opened.
• The meter can only be used together with the probe provided to meet the requirements of the safety standard. If the probe is damaged and needs to be replaced, the probe of the same model and electrical specification must be replaced.

Overview

This meter is an intelligent true RMS digital multimeter.

1. Warning indicator
2. Display
3. key
4. lnput jack
5. Flashlight
6. NCV Sensor area

Power on / off
Press and hold the ” ” key for about 2 seconds to tum on or off.

Gear selection

Press the “FUNC” key to manual mode; then press to select shift position; press and hold the “FUNC” key for about 2 seconds to return to the intelligent (AUTO) measurement mode. Power on is in intelligent measurement mode by default.

Data hold

Press “H” key to turn on or off data holding.
Note, Invalid in NCV / Live.

Flashlight

Press and hold ” ” key for about 2 seconds to turn on or off flashlight.

Backlight

Press” ” key to turn on or off backlight.

Auto power off

After power on, auto power off will be on by default and “ ‘ symbol will be displayed. Without any key operation in about 15 minutes, the meter will automatically shut down to save battery energy.
Press and hold “FUNC” key to turn on meter, the auto power off function will be canceled. The “ ” symbol is not displayed.

Measurement operation
warning

• Do not measure the voltage higher than 600V, otherwise the meter may be damaged.
• Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury.
• Before use, test the known voltage with the meter to confirm that the meter is in good condition.

Smart (AUTO) measurement

This measurement mode is default when power on. In this mode, DC voltage, AC voltage, resistance, continuity can be measured, and the meter can automatically identify the measurement signal.

1. Press  key to power on, display Auto and enter the intelligent measurement mode
2. Insert the red probe into “INPUT” jack and the black probe into the “COM” jack.
3. Contact the probe of the probe with both ends of the measured power supply or resistance (parallel), and the meter will automatically recognize the measured signal.
4. Read the results from the display.

NOTE , The minimum measurable voltage of this mode: O.BV

Professional measurement
AC/DC voltage measurement

1. Press key to power on, display
   After power on, auto power off will AUTO a and enter the intelligent measurement mode.

2. Press “FUNC” key to select “ ” or “ ” gear.

3. Insert the red probe into “INPUT” jack and the black probe into the “COM” jack.

4. Contact the probe with both ends of the measured power supply (parallel).

5. Read the results from the display.

Resistance measurement

1. Press key to power on, display Auta and enter the intelligent measurement mode.
2. Press “FUNC” key to select “ ” gear.
3. Insert the red probe into “INPUT” jack and the black probe into the “COM” jack.
4. Contact the probe with both ends of the measured resistance (parallel).
5. Read the results from the display.

Continuity test

1. Press  key to power on, display Auto and enter the intelligent measurement mode.
2. Press “FUNC” key to select “0•1)” gear.
3. Insert the red probe into “INPUT” jack and the black probe into the “COM” jack.
4. Contact the probe with both ends of the measured resistance or Circuit (parallel).
5. When the resistance value is less than 50 n, the buzzer will sound and the alarm indicator will be on.
6. Read the results from the display.

Frequency measurement

1. Press  key to power on, display Auto and enter the intelligent measurement mode.
2. Press “FUNC” key to select “Hz” gear.
3. Insert the red probe into “INPUr jack and the black probe into the “COM” jack.
4. Contact the probe with both ends of the measured power supply
5. Read the results from the display.

Non-contact AC voltage detection

1. Press key to power on, display Auto and enter the intelligent measurement mode.
2. Press “FUNC” key to select “NCV ”
   • Low battery indication: “G” will be displayed.
   • Input polarity indication: display”-“.
   • Power requirement: 2 x 1.5V AAA batteries.

Accuracy Specifications

The accuracy applies within one year after the calibration.
Reference condition: the environment temperature 18°C to 28°C, the relative humidity is no more than 80%, accuracy:± (% reading+ word)

DC voltage AC voltage Resistance

Range

4000

| Resolution

0.1Q

| Accuracy

±(1.0%+5)

---|---|---
| 0.001 KO
40  K  o_

,__

400 KO

| _o.01 Ko_      ….

0.1 KQ

4MO| 0.001 MO
40 MO| 0.01 MO| ±(1.5%+10)

Overload protection: 250V

Continuity

<Approx. 500, Buzzer will sound and the indicator light will be on.,

Frequency

Range

4Hz

| Resolution

0.001Hz

| Accuracy

±(1.0%+3)

---|---|---
40Hz| 0.01Hz|
400Hz| 0.1Hz
4KHz

40kHz

| 0.001KHz

0.01kHz

400kHz| 0.1kHz
4MHz| 0.001MHz

Overload protection: 250V

Maintenance

Clean

When cleaning the meter, please follow the following steps:

1. Turn off the meter power and remove the probes.
2. Wipe the case with a damp cloth or mild detergent. Do not use abrasives or solvents. Wipe the contacts in each input socket with a clean swab soaked in alcohol.

warning
Always keep the inside of the meter clean and dry to prevent electric shock or damage to the meter.

Replace battery

1. Turn off the meter power and remove the probes.
2. Remove the screw fixing the battery cover and remove the battery cover.
3. Remove the old battery and replace it with a new one of the same specification. Please pay attention to the battery polarity.
4. Install the battery cover back to its original position, and fix and lock the battery cover with screws.

warning

• To avoid electric shock or personal injury caused by wrong reading, please replace the battery immediately when the battery is low. Do not discharge the battery by shorting it or reversing its polarity.
• To operate and maintain the meter safely, please take out the battery when it is not used for a long time to prevent the battery leakage from damaging the product.

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