AM300

User's Guide Extech AM300 300A AC Analog Clamp Meter Introduction Congratulations on your purchase of the Extech AM300 Analog Clamp Meter. This device measure AC Voltage and Current, DC Voltage, and Resistance. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Safety International Safety Symbols This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information. This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be present Double insulation SAFETY NOTES • Do not exceed the maximum allowable input range of any function. Function A AC V DC, V AC • • • • • • • • • • • • Maximum Input 300A AC 600V DC/AC Do not apply voltage to meter when resistance function is selected. 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. When changing ranges always disconnect the test leads from the circuit under test. CAUTIONS Improper use of this meter can cause damage, shock, injury or death. Read and understand this user manual before operating the meter. Always remove the test leads before replacing the battery or fuses. Inspect the condition of the test leads and the meter itself for any damage before operating the meter. Repair or replace any damage before use. Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC. These voltages are considered a shock hazard. Always discharge capacitors and remove power from the device under test before performing Resistance tests. Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the recessed electrical contacts. Other means should be used to ensure that the terminals are not "live". If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. • 2 AM300 V1.1 6/07 STANDARDS PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level. Note – Examples include protected electronic circuits. OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation. Note – Examples include household, office, and laboratory appliances. OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations. Note – Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation. OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation. Note – Examples include electricity meters and primary over-current protection equipment 3 AM300 V1.1 6/07 Description Meter Description 1. 2. 3. 4. 5. 6. 7. 8. 9. Current clamp Clamp opening trigger Function Selector Switch Scale Display POINTER LOCK switch Meter zero adjust Zero ohms adjust COM negative input jack for black test lead OHMS positive input jack for red lead 1 2 5 6 7 9 8 10 3 4 10. VOLT positive input jack for red lead Specifications Function AC Current (50/60Hz) AC Voltage (50/60Hz) DC Voltage Resistance Ranges Accuracy 6, 15, 60, 150, and 300A AC ± 3% of Full Scale for 50/60Hz 300 and 600V AC ± 3% of Full Scale 75V DC 2000Ω (20Ω mid-scale) ± 3% of Full Scale ± 3% of Scale Length Clamp jaw opening Display Input Impedance AC bandwidth Ambient conditions Operating Altitude Battery Fuse Dimensions & Weight Safety 1.5" (38mm) max. Analog with Zero Adjustment 240kΩ (75VDC range), 530kΩ (300VAC range, 1MΩ (600VAC range), 50 to 60Hz (50 to 400Hz for 15 through 300ACA ranges) o o Temperature 32 - 104 F (0 - 40 C); Relative Humidity