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Summary of Contents for Major tech MT350
- Page 1 INSTRUCTION MANUAL MT350 LOOP IMPEDANCE & PSC TESTER...
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Page 2: Table Of Contents
Contents Page no 1. Safety Information................3 2. Safety Symbols..................3 3. Operating Instructions...............3 3.1. Voltage Test................3 3.2. Loop Test................4 3.3. Prospective Short Current Test...........4 4. Features...................4 5. Electrical Specifications..............5 5.1. Loop Resistance...............5 5.2. Prospective Short Current............5 5.3. AC Voltage (50Hz)..............5 6. Parts & Controls................5 7. -
Page 3: Safety Information
1. SAFETY INFORMATION • Read the following safety information carefully before attempting to operate or service the meter. • To avoid damages to the instrument do not apply the signals which exceed the maximum limits shown in the technical specifications tables. •... -
Page 4: Loop Test
3.2. Loop test Turn the tester to 20, 200 or 2000Ω range. Push the test button, LCD will display the value and unit, the tester will beep once after the test is over. To get better value turn the tester to lower range as possible. If LCD flash "... -
Page 5: Electrical Specifications
5. ELECTRICAL SPECIFICATIONS Accuracies are specified in the way: ± (…% of reading +…digits) at 23°C ± 5°C,below 80% RH. 5.1. LOOP RESISTANCE Range Resolution Test Time Full Scale Accuracy 20Ω 0.01Ω 25A/20ms ± 2% of F.S ± 5d 200Ω 0.1Ω... -
Page 6: Measurement Of Loop Impedance And Prospective Short Current
7. MEASUREMENT OF LOOP IMPEDANCE AND PROSPECTIVE SHORT CURRENT If there is a RCD or fuse in the circuit, they must be bridged out prior to testing the loop impedance. According to IEC 60364, every loop should meet the formula: Ra≤50/la Ra: loop impedance 50: max of touch voltage Ia: the current than can make the protection device break down the circuit... -
Page 7: Battery Replacement
8. BATTERY REPLACEMENT 1. When the low battery symbol " " appears on the LCD, the six 1.5V 'AA' batteries must be replaced. 2. Turn the meter off and remove the test leads 3. Unsnap the tilt stand from the rear of the meter 4. - Page 8 MAJOR TECH (PTY) LTD South Africa Australia www.major-tech.com www.majortech.com.au sales@major-tech.com info@majortech.com.au...
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