Pro'sKit MT-1210 Digital Multimeter

Safety Information

This multimeter is designed according to IEC 1010 concerning electronic measuring instruments with an overvoltage category (CAT II) and pollution 2. Follow all safety and operating instructions to ensure the meter is used safely and kept in good operating condition. Full compliance with safety standards is guaranteed only with supplied test leads. If necessary, they must be replaced with the type specified in this manual.

Safety Symbols

• ! Important safety information, refer to the operating manual.
• ⚡ Dangerous voltage may be present.
• ⏚ Earth ground.
• □ Double insulation (Protection class II).
• ⛑️ Fuse must be replaced with rating specified in the manual.

Maintenance

• Before opening the case, always disconnect test leads from all energized circuits.
• For continued protection against fire, replace fuse only with the specified voltage and current ratings: F 500mA/250V (Quick Acting).
• Never use the meter unless the back cover is in place and fastened completely.
• Do not use abrasives or solvents on the meter. Clean it using a damp cloth and mild detergent only.

During Use

• Never exceed the protection limit values indicated in specifications for each range of measurement.
• When the meter is linked to the measurement circuit, do not touch unused terminals.
• Never use the meter to measure voltages that might exceed 500V above earth ground in category II installations.
• When the value scale to be measured is unknown beforehand, set the range selector at the highest position.
• Before rotating the range selector to change functions, disconnect test leads from the circuit under test.
• When carrying out measurements on TV or switching power circuits, always remember that there may be high amplitude voltage pulses at test points, which can damage the meter.
• Always be careful when working with voltages above 60V DC or 30V AC RMS. Keep fingers behind the probe barriers while measuring.
• Before attempting to insert transistors for testing, always be sure that test leads have been disconnected from any measurement circuits.
• Components should not be connected to the hFE socket when making voltage measurements with test leads.
• Never perform resistance measurements on live circuits.

General Description

The meter is a handheld 3 1/2 digital multimeter for measuring DC and AC voltage, DC current, Resistance, Diode, Transistor, and Continuity Test and 1.5V battery test. The back light of the display is optional.

Front Panel Description

1. Display: 3 1/2 digit, 7 segment, 15mm high LCD.

2. Back light: When this button is pushed, the back light of the display is on; press the back light button once, and the back light is turned off.

3. Rotary switch: This switch is used to select functions and desired ranges as well as to turn on/off the meter.

4. Hold button: When this button is pushed, the display will keep the last reading and a "H" symbol will appear on the LCD until it is pushed again.

5. "10A" jack: Plug in connector for red test lead for 10A measurement. "COM" jack.

6. "VmA" jack: Plug in connector for black (negative) test lead.

7. "VΩmA" jack: Plug in connector for red (positive) test lead for voltage, resistance, and current (except 10A) measurements.

Specifications

Accuracy is specified for a period of one year after calibration and at 18°C to 28°C (64°F to 82°F) with relative humidity up to 80%.

General

• Maximum voltage between terminals and earth ground: CAT II 600V
• Fuse protection: F 500mA/250V
• Power: 9V battery, NEDA 1604 or 6F22
• Display: LCD, 1999 counts, updates 2-3/sec.
• Measuring method: Dual-slope integration A/D converter
• Overrange Indication: Only figure "OL" on the display
• Polarity indication: "-" displayed for negative polarity
• Operating environment: 0 to 40°C
• Storage temperature: -10°C to 50°C.
• Low battery indication: "<0xE5><0x85><0x89>" appears on the display
• Size: 147mm x 74mm x 35mm
• Weight: Approx. 180g.

DC Voltage

Overload Protection: 250V rms. For 200mV range and 500V DC or rms. AC for other ranges.

DC Current

Overload Protection: F 500mA/250V fuse. (10A range unfused)

AC Voltage

Overload Protection: 500V DC or rms. AC for all ranges. Frequency range: 40Hz to 400Hz. Response: Average responding, calibrated in rms. of a sine wave.

Diode & Continuity

Resistance

Maximum Open Circuit Voltage: 2.8V. Overload Protection: 250V DC or rms. AC for all ranges.

Transistor hFE Test (0-1000)

Battery Testing

Operating Instructions

DC Voltage Measurement

1. Connect the red test lead to the "V.Ω.mA" jack and the black lead to the "COM" jack.
2. Set rotary switch at desired DCV position. If the voltage to be measured is not known beforehand, set range switch at the highest range position and then reduce it until satisfactory resolution is obtained.
3. Connect test leads across the source or load being measured.
4. Read voltage value on the LCD display along with the polarity of the red lead connection.

DC Current Measurement

1. Connect the red test lead to the "V.Ω.mA" jack and the black test lead to "COM" jack. (For measurements between 200mA and 10A, remove red lead to "10A" jack.)
2. Set the rotary switch at desired DCA position.
3. Open the circuit in which the current is to be measured, and connect test leads in series with the circuit.
4. Read current value on LCD display along with the polarity of red lead connection.

AC Voltage Measurement

1. Connect the red test lead to "V.Ω. mA" jack and the black test lead to the "COM" jack.
2. Set the rotary switch at desired "V~" range position.
3. Connect test leads across the source or load being measured.
4. Read voltage value on the LCD display.

Resistance Measurement

1. Connect the red test lead to "V. Ω. mA" jack and black test lead to the "COM" jack. (The polarity of red lead is positive "+".)
2. Set the rotary switch at desired "Ω" range position.
3. Connect test leads across the resistor to be measured and read LCD display.
4. If the resistance being measured is connected to a circuit, turn off power and discharge all capacitors before applying test probes.

Diode Test

1. Connect the red test lead to "V.Ω.mA" jack and the black test lead to the "COM" jack (The polarity of red lead is positive "+".).
2. Set the rotary switch at "🔊︎" position.
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. The approx. forward voltage drop of the diode will be displayed. If the connection is reversed, only figure "OL" will be shown.

Transistor Test

1. Set the rotary switch at "hFE" position.
2. Determine whether the transistor under testing is NPN or PNP and locate the emitter base and collector leads. Insert the leads into proper holes of the hFE socket on the front panel.
3. Read the approximate hFE value at the test condition of base current 10μA and Vce 2.8V.

Audible Continuity Test

1. Connect red test lead to "V.Ω.mA", black test lead to "COM".
2. Set range switch to "🔊︎" position.
3. Connect test leads to two points of circuit to be tested. If continuity exists, built-in buzzer will sound.

Battery Test

1. Connect the red test lead to "V.Ω.mA" jack and black test lead to the "COM" jack.
2. Set the rotary switch at desired "1.5V mA + " position.
3. Connect the red test lead to the battery "+" and the black test lead to the battery "-".
4. Read mA value on the LCD display. If the value is less than 40mA, it means the battery is low.

Battery & Fuse Replacement

WARNING: To avoid electric shock, be sure the thermocouple has been removed before changing to another function measurement.

If "<0xE5><0x85><0x89>" appears on display, it indicates that the battery should be replaced.

Fuse rarely needs replacement and blows almost always as a result of operator's error.

To replace battery & fuse (500mA/250V), remove the 2 screws in the bottom of the case. Simply remove the old one and replace with a new one.

Be careful to observe battery polarity.

WARNING: Before attempting to open the case, always be sure that test leads have been disconnected from measurement circuits. Close case and tighten screws completely before using the meter to avoid electrical shock hazard.

Accessories

• Operator's instruction manual
• Set of test leads
• Holster