USER GUIDE 400Amp True RMS AC/DC Clamp Meter Model MA435T
Introduction Congratulations on your purchase of this Extech MA435T True RMS Clamp Meter. This meter measures AC/DC Current, AC/DC Voltage, Resistance, Capacitance, Frequency, Diode Test, Duty Cycle and Continuity. Special features include Thermocouple Temperature and Non-Contact Voltage detection. The double molded case is designed for heavy duty use. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
SAFETY NOTES Do not exceed the maximum allowable input range of any function. Do not apply voltage to meter when resistance function is selected. Set the function switch OFF when the meter is not in use. Remove the battery if meter is to be stored for longer than 60 days. WARNINGS Set function switch to the appropriate position before measuring. When measuring volts do not switch to current/resistance modes. Do not measure current on a circuit whose voltage exceeds 600V.
Description Meter Description 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
Operation NOTES: Read and understand all Warning and Caution statements in this operation manual prior to using this meter. Set the function select switch to the OFF position when the meter is not in use. Non-Contact Voltage Detector WARNING: Risk of Electrocution. Before use, always test the Voltage Detector on a known live circuit to verify proper operation. 1. Rotate the Function switch to any position. 2. Place the detector probe tip on the conductor to be tested. 3.
AC/DC Voltage, Frequency, Duty Cycle Measurements CAUTION: Do not measure voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. 1. Rotate the function switch to the V position. 2. Press the MODE button to select AC or DC Voltage. 3. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive V jack. Touch the black test probe tip to the negative side of the circuit.
Capacitance Measurements WARNING: To avoid electric shock, discharge the capacitor before measuring. 1. Rotate the function switch to the CAP capacitance position. 2. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive CAP jack. 3. Touch the black test probe tip to one side of the device. Touch the red test probe tip to the other side of the device. 4. Read the capacitance value in the display. Type K Temperature Measurements 1.
Data Hold To freeze the LCD reading, press the HOLD button. The HOLD icon appears on the LCD. Press the HOLD button again to return to normal operation. Relative Press the REL button (REL will appear in the display) to zero the reading and create a reference point. All future reading will be the difference between the actual reading and the stored “REL” reading. In the REL mode, autoranging is disabled and measurements are limited to the range active when the REL button was pressed.
Maintenance WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input terminals, and turn OFF the meter before opening the case. Do not operate the meter with an open case. Cleaning and Storage Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solvents. If the meter is not to be used for 60 days or more, remove the battery and store it separately. Battery Replacement 1.
Specifications Accuracy (% of reading + digits) Function Range Resolution AC Current* 40.00 A 0.01A 400.0 A 0.1A DC Current 40.00 A 0.01A 400.0 A 0.1A ±(2.8% + 5 digits) AC Voltage* 400.0mV 0.1mV ±(1.5% + 30 digits) 4.000 V 0.001V 40.00 V 0.01V 400.0 V 0.1V 50/60Hz TRMS 50/60Hz TRMS 600 V DC Voltage Capacitance Frequency ±(2.5% + 5 digits) ±(1.5% + 8 digits) 1V ±(2.5% + 5 digits) 400.0 mV 0.1mV ±(0.8% + 2 digits) 4.000 V 0.001V 40.00 V 0.01V 400.0 V 0.
General Specifications Clamp jaw opening Display Continuity check Diode test Low Battery indication Over-range indication Display rate Thermocouple sensor Input Impedance AC bandwidth AC response Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Battery Auto power OFF Dimensions & Weight Safety Approvals 30mm (1.18") approx. 4,000 count LCD Threshold <150; Test current < 0.5mA Test current of 0.3mA typical; Open circuit voltage 1.
