AEMC®Instruments Model 503
Clamp-on Meters [Cat 2117.22]
Characteristics:
- Compact size – fits into your pocket
- 400AAC current measurements
- 600VAC volts measurements
- Resistance measurements to 400Ω
- Continuity with beeper below 35Ω
- Hold function to “freeze” readings
- Large easy-to-read 4000-count display
- 42-segment bargraph
- Includes test leads and a soft carrying pouch
Application:
- Industrial, commercial, HVAC and residential troubleshooting
- Power panel, junction box and battery bank monitoring
- Electrical testing and troubleshooting on traditional and non-linear leads, such as adjustable speed drives and computers
Product Description:


The Model 503, Clamp-on Meter, is a general-purpose professional Clamp-on. A strong mechanical case design, quality materials, full ranges and compliance to international safety and quality standards ensure a professional and reliable tool. The Model 503 is auto-ranging, and provides the user with AC Volts, DC Volts, AC Amperes, DC Amperes, resistance, and continuity.The large and complete 4000-count LCD features comprehensive user interface symbols such as a low battery indicator. It is equipped with a Data Hold function, which freezes the measurement. The Model 503 is compact for comfortable one-handed operation, and the hooked jaw design is easy to maneuver in crowded wiring and breaker panels. The jaw opening for the Model 503 is 1.1″ (28mm).


Average Sensing | Model 503 | |
AC AMPERES | ||
Measurement Range | 0.05 to 400A | |
Resolution | 40A400A | 0.01A0.1A |
Accuracy | 50 to 60Hz60 to 500Hz | ±1.5% of Reading ± 10cts±2.5% of Reading ± 10cts |
Overload Protection | 600Arms | |
AC VOLTS | (Auto-Ranging) | |
Measurement Range | 0.5 to 600V | |
Resolution | 400V600V | 0.1V1V |
Accuracy | 50 to 60Hz60 to 500Hz | ±0.8% of Reading ± 5cts±1.5% of Reading ± 5cts |
Input Impedance | 10MΩ | |
Overload Protection | 600Vrms | |
DC AMPERES | (Auto-Ranging) | |
Measurement Range | 0.10 to 400A | |
Resolution | 40A400A | 0.01A0.1A |
Accuracy | ±2.5% of Reading ± 10cts | |
Overload Protection | 600Arms | |
DC VOLTS | (Auto-Ranging) | |
Measurement Range | 0.2 to 600V | |
Resolution | 400V600V | 0.1V1V |
Accuracy | ±1% of Reading ± 2cts | |
Input Impedance |
10MΩ
|
|
Overload Protection |
600Vrms
|
|
RESISTANCE-OHMS | (Ω) | |
Measurement Range | 0.2 to 400Ω | |
Resolution | 0.1Ω | |
Accuracy | ±1% of Reading ± 2cts | |
Max Test Voltage |
1.5VDC
|
|
Overload Protection |
600Vrms
|
|
CONTINUITY | ||
Beeper Activation | <40Ω | |
Max. Test Voltage | 1.5VDC | |
Overload Protection | 600Vrm |
General Specifications | |
Digital Display | 3 3/4 digits LCD display, 4000-count (max. reading 3999) |
Analog Display | Fast 42-segment analog bargraph display |
Symbol & Scale Range | Automatic according to range and input signal |
Polarity | Displayed when negative signal applied to input |
Overload | Displayed when input signal exceeds range |
Sample Rate | 2 samples/sec for the digital display, 20 samples/sec for the analog bargraph |
Power Source | Two 1.5V AAA batteries |
Auto-Off | 30 minutes |
Low Power Indication | Displayed when the battery is below the required voltage |
Jaw Opening Size Ø | 1.1″ (28mm) – faciliates 500MCM cable |
Dimension | 7.60 x 1.97 x 1.1″ (193 x 50 x 28mm) |
Weight | 8.11 oz (230g) with batteries |
ENVIRONMENTAL | |
Altitude | 2167 ft (2000m) max. |
Operating Temperature | 32° to 104°F (0° to 40°C),<80% RH, non-condensing |
Storage Temperature | 14° to 140°F (-10° to 60°C),<70% RH, battery removed |
Pollution Degree | 2 |
SAFETY | |
Safety Rating | EN 61010, 600V Cat. II, EN 61010, 300V Cat. III |
Double Insulation | Yes |
CE Mark | Yes |




Related links:
- Model 500 , (AC, 400AAC, 600VAC, Ohms, Continuity)
- Model 501 , (AC, 400AAC, 600VAC/DC, Ohms, Continuity)
- Model 502 , (TRMS, 400AAC, 600VAC/DC, Ohms, Continuity)
- Model 503 , (AC/DC, 400AAC/DC, 600VAC/DC, Ohms, Continutiy)
- Model 511 , (AC, 1000AAC, 1000VAC/DC, Ohms, Continuity)
- Model 512 , (TRMS, 1000AAC, 600VAC/DC, Ohms, Continuity)
- Model 514 , (AC/DC, TRMS, 1000AAC/DC, 600VAC/DC, Ohms,Continuity)
- Model 670 , Dual Display (AC/DC, TRMS, 1000AAC/DC, 1000/DC,Ohms, Continuity)
- Model 675 , Dual Display (AC/DC, TRMS, 1000AAC/DC,1000VAC/DC,Ohms, Continuity)
- Model F05 , (TRMS, 400AAC/DC, 600VAC/DC, Hz, Power (kW), Phase Rotation, Ohms, Continuity)
- Model F07, (TRMS, 400AAC/DC, 600VAC/DC, Hz, Ohms, Continuity, Temperature)
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