The NEO 94-002 Digital Multimeter is a versatile electronic measuring instrument designed for a wide range of electrical measurements. It conforms to IEC-61010 standards for electronic measuring instruments, featuring a CAT II 600V measurement category and pollution degree 2 protection.
Function Description:
This digital multimeter is equipped with a 3½-digit LCD display, capable of showing a maximum reading of 1999. It is designed to measure DC voltage (VDC), AC voltage (VAC), AC current (ACA), resistance, temperature, and to perform diode and continuity tests. Key functions include auto polarity indication, data hold (retaining the displayed reading), maximum value hold (retaining the highest measured value), overrange indication, and automatic power-off. The clamp jaw allows for non-contact AC current measurement, with the conductor ideally placed in the center of the jaws for accuracy.
Important Technical Specifications:
- Display: 3½-digit LCD, max. reading 1999.
- Overrange Indication: "OL" or "-OL" on the display.
- Automatic Zeroing Function: Yes.
- Sampling Rate: Approximately 3 times per second.
- AC Current Sensor: Clamp-shape transformer.
- Jaw Opening Capability: 37mm.
- Max. Measurable Conductor Diameter: Ø37mm.
- Battery: 2 x 1.5V AAA batteries.
- Low Battery Indication: "+" symbol on LCD.
- Operating Temperature: 0°C to 40°C, <75% RH.
- Storage Temperature: -20°C to 60°C, <85% RH.
- Dimensions: 230mm x 77mm x 32mm.
- Weight: Approximately 220g (including batteries).
DC Voltage (VDC) Measurement:
- Ranges: 200mV, 2V, 20V, 200V, 600V.
- Resolution: 0.1mV (200mV), 1mV (2V), 10mV (20V), 100mV (200V), 1V (600V).
- Accuracy: ±(0.8%+3) for 200mV, ±(0.8%+1) for 2V-200V, ±(1%+3) for 600V.
- Input Impedance: 10MΩ.
- Overload Protection: 600V rms.
- Max. Input Voltage: 600V.
AC Voltage (VAC) Measurement:
- Ranges: 2V, 20V, 200V, 600V.
- Resolution: 1mV (2V), 10mV (20V), 100mV (200V), 1V (600V).
- Accuracy: ±(1.2%+5) for 2V-200V, ±(1.5%+5) for 600V.
- Input Impedance: 10MΩ.
- Frequency Response: 40Hz to 400Hz.
- Overload Protection: 600V DC/AC rms.
- Max. Permitted Input Voltage: 600V rms.
- Display: Sine wave rms, average response.
Resistance (Ω) Measurement:
- Ranges: 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ, 20MΩ.
- Resolution: 100mΩ (200Ω), 1Ω (2kΩ), 10Ω (20kΩ), 100Ω (200kΩ), 1kΩ (2MΩ), 10kΩ (20MΩ).
- Accuracy: ±(1.2%+2) for 200Ω, ±(1%+2) for 2kΩ-200kΩ, ±(1.2%+2) for 2MΩ, ±(1.5%+2) for 20MΩ.
- Overload Protection: 600V rms.
Temperature Measurement (°C, °F):
- Ranges: -20°C to 1000°C, -4°F to 1832°F.
- Resolution: 1°C, 1°F.
- Accuracy:
- -20°C to 0°C: ±(4%+5)
- 0°C to 400°C: ±(1%+5)
- 400°C to 1000°C: ±(2%+10)
- -4°F to 32°F: ±(4%+9)
- 32°F to 752°F: ±(1%+9)
- 752°F to 1832°F: ±(2%+20)
- Overload Protection: 600V rms.
Diode and Continuity Test:
- Diode: Approx. forward-voltage will be displayed (opencircuit voltage ~1.48V).
- Continuity: Buzzer sounds if resistance is below about 50Ω.
- Overload Protection: 600V rms.
AC Current (ACA) Measurement (Auto Range):
- Ranges: 2A, 20A, 200A, 600A.
- Resolution: 0.001A (2A), 0.01A (20A), 0.1A (200A), 1A (600A).
- Accuracy:
- ≤0.4A: ±(5%+20)
-
0.4A: ±(4%+10) for 2A range
- ≤4A: ±(4%+10)
-
4A: ±(3%+8) for 20A range
- ±(2.5%+5) for 200A and 600A ranges.
- Overload Protection: 600A rms.
- Frequency Range: 50Hz to 60Hz.
Usage Features:
- Function/Range Switch: Used to select the desired measurement function and range, and to turn the meter on/off (OFF position).
- RANGE Button: Toggles between autorange (indicated by "AUTO") and manual range modes. In manual mode, each press increments the range. Holding the button for 2 seconds returns to autorange.
- FUNC. Button: Switches between different sub-functions within a mode (e.g., °C/°F for temperature, diode/continuity for diode mode).
- MAX H Button: Activates Maximum Value Hold, displaying the highest reading since activation. Press again to exit.
- DATA H Button: Activates Data Hold, freezing the current reading on the display. Press again to exit.
- Backlight Button: Press and hold for 2 seconds to turn the backlight on/off. It automatically turns off after 15 seconds.
- Automatic Power-Off: The meter automatically turns off after about 15 minutes of inactivity to conserve battery life. Five short beeps are emitted before shutdown, followed by a long beep. Rotating the function/range switch or pressing any button will re-activate the meter. If DATA H is active, auto power-off is disabled.
- Always inspect the meter and test leads for damage before use.
- Do not use the meter if it operates abnormally or in explosive environments.
- Do not apply voltage exceeding the meter's rated limits.
- Exercise caution when working with voltages above 30V AC rms, 42V peak, or 60V DC, as these pose a shock hazard.
- Always connect the common (black) test lead first and disconnect the live (red) test lead first.
- Remove test leads before opening the battery cover or meter case.
- Replace batteries when the low battery indicator appears to avoid false readings.
- Do not touch live circuit elements.
- For resistance, diode, continuity, and temperature measurements, disconnect circuit power and discharge all capacitors first.
- Ensure proper function and range selection for measurements.
- Disconnect test leads and remove the clamp jaw from the circuit before changing functions or ranges.
Maintenance Features:
- Cleaning: Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
- Terminal Cleaning: Turn the meter off, remove test leads, shake out any dirt, and clean terminals with an alcohol-soaked swab.
- Battery Replacement: When the low battery indicator appears, replace the 2 x 1.5V AAA batteries. Use an appropriate screwdriver to gently rotate the rotary lock on the battery cover 90 degrees counter-clockwise to open, replace batteries, and then rotate 90 degrees clockwise to secure. Avoid excessive force to prevent damage.
Included Accessories:
- Instruction manual
- Test leads (1 pair)
- K-type thermocouple (for temperature measurement)
This multimeter is designed for ease of use and reliability, making it an ideal tool for various electrical measurement tasks in low-voltage installations and for portable equipment.
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