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Related Manuals for Extech Instruments EX505-K
Summary of Contents for Extech Instruments EX505-K
- Page 1 User's Guide Autoranging True RMS Multimeter Extech EX505...
- Page 2 Introduction Congratulations on your purchase of the Extech EX505 True RMS Autoranging Multimeter. This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Diode Test, and Continuity plus Thermocouple Temperature. It features a waterproof, rugged design for heavy duty use This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
- Page 3 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.
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Page 4: Safety Instructions
SAFETY INSTRUCTIONS This meter has been designed for safe use, but must be operated with caution. The rules listed below must be carefully followed for safe operation. NEVER apply voltage or current to the meter that exceeds the specified maximum: Input Protection Limits Function Maximum Input... - Page 5 Controls and Jacks 1. 4,000 count LCD display 2. RANGE button 3. Hz and % button 4. Mode button 5. Function switch 6. mA, µA and 10A input jacks 7. COM input jack 8. Positive input jack 9. Backlight button 10.
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Page 6: Dc Voltage Measurements
Operating Instructions WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and should be measured with great care. ALWAYS turn the function switch to the OFF position when the meter is not in use. If “OL” appears in the display during a measurement, the value exceeds the range you have selected. -
Page 7: Dc Current Measurements
DC CURRENT MEASUREMENTS CAUTION: Do not make 20A current measurements for longer than 30 seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads. Insert the black test lead banana plug into the negative COM jack. For current measurements up to 4000µA DC, set the function switch to the µA position and insert the red test lead banana plug into the µA/mA jack. -
Page 8: Resistance Measurements
RESISTANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements. Remove the batteries and unplug the line cords. Set the function switch to the ΩCAP position. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into the positive ... -
Page 9: Temperature Measurements
TEMPERATURE MEASUREMENTS Set the function switch to the ºF or ºC position. Insert the Temperature Probe into the input jacks, making sure to observe the correct polarity. Touch the Temperature Probe head to the part whose temperature you wish to measure. Keep the probe touching the part under test until the reading stabilizes (about 30 seconds). -
Page 10: Autoranging/Manual Range Selection
FREQUENCY SENSITIVITY (ELECTRICAL) The frequency sensitivity is range dependent when the function is selected from while in the voltage or current measuring function. Below are typical sensitivities for the “electrical” measurement modes. Range Sensitivity Frequency width ( DC/AC ) 5Hz~10kHz ≥1.5V rms 40V, 400V 5Hz~20kHz... -
Page 11: Maintenance
Maintenance WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the back cover or the battery or fuse covers. WARNING: To avoid electric shock, do not operate your meter until the battery and fuse covers are in place and fastened securely. -
Page 12: Battery Installation
BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover. Turn power off and disconnect the test leads from the meter. Open the rear battery cover by removing two screws (B) using a Phillips head screwdriver. Insert the battery into battery holder, observing the correct polarity. -
Page 13: Specifications
Specifications Function Range Resolution Accuracy DC Voltage 400mV 0.1mV (0.5% reading + 2 digits) 0.001V (1.2% reading + 2 digits) 0.01V 400V 0.1V 1000V (1.5% reading + 10 digits) (2.0% reading + 10 digits) AC Voltage 400mV 0.1mV 0.001V (2.0% reading + 5 digits) 0.01V 400V 0.1V... - Page 14 Function Range Resolution Accuracy Resistance (1.2% reading + 4 digits) 400 0.1 (1.0% reading + 2 digits) 4k 0.001k 40k 0.01k (1.2% reading + 2 digits) 400k 0.1k 4M 0.001M (2.0% reading + 3 digits) 40M 0.01M (5.0% reading + 0.5nF) Capacitance 0.001nF (5.0% reading + 7 digits)
- Page 15 Enclosure Double molded, waterproof (IP67) Shock (Drop Test) 2 meters (6.5 feet) Diode Test Test current of 0.3mA typical, open circuit voltage 1.5V DC typical Continuity Check Audible signal will sound if the resistance is less than 100 (approx.), test current <0.3mA Temperature Sensor Requires type K thermocouple...