The Amprobe AM-550 is the best multimeter in its classdesigned for professional electricians who need to maintain service ortroubleshoot advanced electrical systems in the most demanding environments.Packed full of features such as true-rms, dual thermocouples for takingdifferential temperature measurements, a low impedance function to detect strayvoltage, and a low pass filter to accurately take measurements on variablefrequency drives, the Amprobe AM-550 Digital Multimeter allows for quickgo-no-go checks without the need for an additional tool.
AM-500 | AM-510 | AM-520 | AM-530 | AM-540 | AM-550 | |||
Multimeter Type | Auto-ranging | Com / Res | HVAC | Electrical | Adv. HVAC | Industrial | ||
F U N C T I O N | Safetey Rating | Safety | CAT III 600V | CAT III 600V | CAT III 600V Cat II 1000 | CAT III 600V Cat II 1000 | CAT III 600V Cat II 1000 | CAT III 600V Cat II 1000 |
Measure voltage in noisy environments | True rms | ■ | ■ | |||||
Electrical panels, AC outlets | AC Voltage (V) | 600 | 600 | 750 | 750 | 1000 | 1000 | |
DC systems, auto/marine batteries | DC Voltage (V) | 600 | 600 | 1000 | 1000 | 1000 | 1000 | |
AC Current – electrical panels, appliances | AC Current (A) | 10 | 10 | 10 | 10 | 10 | 10 | |
DC Current-electronics, DC motors | DC CURRENT (A) | 10 | 10 | 10 | 10 | 10 | 10 | |
Specified resistance and continuity | Resistance (MOhms) | 20 | 40 | 40 | 40 | 60 | 60 | |
Flame sensors | Microamps | ■ | ■ | ■ | ■ | ■ | ■ | |
Diodes in AC to DC converters | Diode Test | ■ | ■ | ■ | ■ | ■ | ■ | |
Fuses, lightbubls, wire connections | Continuity | ■ | ■ | ■ | ■ | ■ | ■ | |
Hosehold batteries | Battery test | ■ | ■ | |||||
Motor startup or run capacitors | Capacitance | ■ | ■ | ■ | ■ | ■ | ||
Frequency verification | Frequency | ■ | ■ | ■ | ■ | ■ | ||
Non-contact voltage test | Non-contact voltage | ■ | ■ | ■ | ■ | ■ | ||
Electrical load-time on vs time off | Duty cycle | ■ | ■ | ■ | ||||
Temp of air vents, fuses, transformers | Temperature inputs | 1 | 1 | 2 | 2 | |||
F E A T U R E S | Automatically selects measurement range | Autoranging | ■ | ■ | ■ | ■ | ■ | ■ |
Manually select measurment range | Manual ranging | ■ | ■ | ■ | ■ | ■ | ||
Voltage on variable frequency drives | Low pass filter | ■ | ■ | |||||
Detect stray voltages | Low Z | ■ | ||||||
Dimly lit areas | Built-in flashlight | ■ | ■ | ■ | ■ | ■ | ||
D I S P L A Y | Meter resolution | LCD Counts | 2,000 | 4,000 | 4,000 | 4,000 | 6,000 | 6,000 |
Dimly lit areas | Backlight | ■ | ■ | ■ | ■ | ■ | ||
Monitoring fast changing signals | Bar graph | ■ | ■ | ■ | ■ | |||
Two relative measurements on one screen | Dual display | ■ | ■ | |||||
E V E N T S | Data memory | Data hold | ■ | ■ | ■ | ■ | ■ | ■ |
Difference between two measurements | Relative reading | ■ | ■ | ■ | ■ | ■ | ||
Max/min peak measurement | Max/min hold | ■ | ■ | ■ | ■ | |||
Specialized signal measurements | Peak hold (crest) | ■ | ■ |