Do you have a question about the HT COMBI420 and is the answer not in the manual?
Continuity Test | Yes |
---|---|
Diode Test | Yes |
Data HOLD | Yes |
MAX/MIN | Yes |
Auto Power OFF | Yes |
Backlight | Yes |
Display | 4000 counts |
Standard | IEC/EN61010-1 |
Safety | CAT III 600V |
Operating Temperature | 0°C |
Initial checks and safety guidelines before using the instrument.
Definitions and implications of different overvoltage categories for measurements.
Detailed overview of the instrument's physical components and controls.
Description of the function of each key on the instrument's keypad.
Configuration options for language, auto power off, voltage, and system.
Automatic sequence for earth resistance, RCD tripping, and insulation.
Measuring continuity of protective and equipotential conductors.
Measuring insulation resistance at various test voltages.
Testing general and selective RCDs for tripping time and current.
Measuring line/loop impedance and calculating fault current.
Measuring voltage, current, power, and harmonics.
Selecting and modifying test parameters like IdN, RCD type, UL, and VNom.
Steps for calibrating test cables for accurate measurements.
Setting Func, VNom, Lim, and Temp parameters for the test.
Explanation of AUTO, x1/2, x1, x2, x5, and RA modes for RCD testing.
Explanation of P-N, P-P, and P-PE modes for impedance testing.
Measuring air speed, humidity, temperature, dB, Lux, and voltage.
Connecting the clamp for indirect or direct leakage current measurement.
Explanation of PAR, HRM V, and HRM I modes for mains analysis.
Procedure for saving measurement data using the SAVE key.
Procedure and precautions for replacing the instrument's batteries.
Detailed specifications for continuity, insulation, and RCD tests.
Electrical safety ratings and compliance standards.
Terms and conditions for instrument warranty coverage.
Purpose, parts to check, and allowable values for continuity tests.
Purpose and procedure for insulation resistance tests.
Checking the proper functioning of general and selective RCDs.
Verifying the real tripping current of RCDs.
Measuring fault loop impedance and prospective fault current.
Understanding voltage/current harmonics and their effects.