AEMC 205 - User Manual

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Overview

The AEMC Model 205 is a professional electrical measuring instrument designed for a wide range of electrical measurements.

Function Description:

The Model 205 combines multiple functions, including:

Current measurement (AC, DC, AC+DC)
Measurement of InRush current / overcurrent (True InRush®)
Voltage measurement (AC, DC, AC+DC)
Frequency measurement (Hz)
Measurement of harmonic distortion (THD, THDf, THDr)
Continuity test with buzzer
Resistance measurement (Ω)
Diode test
Power measurements (W, VA, var, and PF)
Phase order indication

Important Technical Specifications:

General:

Safety Standards: IEC-61010-1, IEC-61010-2-30, and IEC-61010-2-32 for voltages of 1000V in category III or 600V CAT IV.
Altitude: Less than 2000m, indoors.
Pollution Degree: Not exceeding 2.
Power Supply: 1x9V LF22 battery.
Battery Life: >120 hours (without backlighting).
Auto Power Off: After 10 minutes of inactivity.
Electromagnetic Compatibility: Compliant with EN-61326-1 (residential environment).
Mechanical Strength: Free fall: 2m (IEC-68-2-32).
Housing Protection: IP40 (IEC-60529).
Housing: Rigid polycarbonate shell with over-molded elastomer covering; UL94 V1.
Jaws: Polycarbonate, 1.3" (34mm) opening/clamping diameter.
Screen: LCD display unit with blue backlighting, 1.1 x 1.7" (28 x 43.5mm).
Dimensions: 8.7 x 3.0 x 1.65" (222 x 78 x 42mm).
Weight: 0.86 lbs (340g) with batteries.

Reference Conditions:

Temperature: 23°C ±2°C
Relative Humidity: 45% to 75%
Supply Voltage: 9.0V ±0.5V
Frequency Range: 45 to 65Hz
Sine Wave: Pure
Peak Factor: √2
Conductor Position: Centered in the clamp.
Adjacent Conductors/Magnetic/Electric Field: None.

Environmental Conditions:

Operating Temperature: -4° to +131°F (-20° to +55°C).
Storage Temperature: -40° to +158°F (-40° to +70°C).
Relative Humidity (RH): ≤90% up to 131°F (55°C) operating, ≤90% up to 158°F (70°C) storage.

Measurement Ranges & Accuracy (under reference conditions):

DC Voltage:

Ranges: 0.00 to 59.99V, 60.0 to 599.9V, 600V to 1000V.
Accuracy: ±(1% R + 10cts) for 0.00-5.99V, ±(1% R + 3cts) for 6.00-1000V.
Resolution: 0.01V, 0.1V, 1V.
Input Impedance: 10MΩ.
Note: Displays "+OL" above +2000V and "-OL" below -2000V in REL mode. Repetitive beep above 1000V.

AC Voltage:

Ranges: 0.15 to 59.99V, 60.0 to 599.9V, 600V to 1000V RMS (1400V peak).
Accuracy: ±(1% R + 10cts) for 0.15-5.99V, ±(1% R + 3cts) for 6.00-1000V.
Resolution: 0.01V, 0.1V, 1V.
Input Impedance: 10MΩ.
Note: Displays "OL" above 1000V (1400V in PEAK mode). Bandwidth in AC = 3kHz.

AC+DC Voltage:

Ranges: 0.15 to 59.99V, 60.0 to 599.9V, 600V to 1000V RMS (1400V peak).
Accuracy: ±(1% R + 10cts) for 0.15-5.99V, ±(1% R + 3cts) for 6.00-1000V.
Resolution: 0.01V, 0.1V, 1V.
Input Impedance: 10MΩ.
Note: Displays "OL" above 1000V (1400V in PEAK mode). Bandwidth in AC = 3kHz.

DC Current:

Ranges: 0.00 to 59.99A, 60.0 to 599.9A, 600A to 900A.
Accuracy (zero corrected): ±(1% R + 10cts) for 0.00-59.99A, ±(1% R + 3cts) for 60.0-900A.
Resolution: 0.01A, 0.1A, 1A.
Note: Displays "+OL" above 1800A and "-OL" below -1800A in REL mode. Residual current at zero can be corrected by "DC zero" function.

AC Current:

Ranges: 0.15 to 59.99A, 60.0 to 599.9A, 600A.
Accuracy: ±(1% R + 10cts) for 0.15-59.99A, ±(1% R + 3cts) for 60.0-600A.
Resolution: 0.01A, 0.1A, 1A.
Note: Displays "OL" above 900A (in PEAK mode). Bandwidth in AC = 3kHz. Values between 0 and 0.15A show "----".

AC+DC Intensity:

Ranges: 0.15 to 59.99A, 60.0 to 599.9A, AC: 600A, DC or PEAK: 600A to 900A.
Accuracy (zero corrected): ±(1% R + 10cts) for 0.15-59.99A, ±(1% R + 3cts) for 60.0-900A.
Resolution: 0.01A, 0.1A, 1A.
Note: Displays "+OL" above +1800A and "-OL" below -1800A in REL mode (DC). Displays "+OL" above 1500A in PEAK mode (AC/AC+DC). Bandwidth in AC = 3kHz.

True InRush® Measurement:

Ranges: 6 to 600AAC, 6 to 900ADC.
Accuracy: ±(5% R + 5cts).
Resolution: 1A.
Note: Triggering threshold is 10A if initial current is zero.

Continuity Measurement:

Range: 0.0 to 599.9Ω.
Open-circuit Voltage: ≤ 3.6V.
Measurement Current: 550μA.
Accuracy: ±(1% R + 5cts).
Buzzer Triggering Threshold: Adjustable from 1 to 599Ω (40Ω default).

Resistance Measurement:

Ranges: 0.0 to 599.9Ω, 600 to 5999Ω, 6 to 59.99KΩ.
Accuracy: ±(1% R + 5cts).
Resolution: 0.1Ω, 1Ω, 10Ω.
Open-circuit Voltage: ≤ 3.6V.
Measurement Current: 550μA, 100μA, 10μA.
Note: Displays "OL" above maximum display value.

Diode Test:

Range: 0.000 to 3.199VDC.
Accuracy: ±(1% R + 10cts).
Resolution: 0.001V.
Measurement Current: 0.55mA.
Indication: "OL" for measured voltage >3.199V (junction reversed or open-circuit).

Active DC Power Measurements:

Ranges: 0 to 5.999W, 6.00 to 59.99kW, 60.0 to 599.9kW, 600 to 900kW.
Accuracy: ±(2% R + 10cts) for 0-5.999W, ±(2% R + 3cts) for 6.00-900kW.
Resolution: 1W, 10W, 100W, 1000W.
Note: Displays O.L or ±O.L above ±1800kW in REL mode. Instability linked to current measurement (approx. 0.1A).

Active AC Power Measurements:

Ranges: 5 to 5999W, 6.00 to 59.99kW, 60.0 to 599.9kW, 600kW.
Accuracy: ±(2% R + 10cts) for 5-5999W, ±(2% R + 3cts) for 6.00-600kW.
Resolution: 1W, 10W, 100W, 1000W.
Note: Bandwidth in AC (voltage/current) = 3kHz. Power < 5W or V < 0.15V or I < 0.15A displays "----".

Active AC+DC Power Measurements:

Ranges: 5 to 5999W, 6.00 to 59.99kW, 60.0 to 599.9kW, 600 to 900kW.
Accuracy: ±(2% R + 10cts) for 5-5999W, ±(2% R + 3cts) for 6.00-900kW.
Resolution: 1W, 10W, 100W, 1000W.
Note: Bandwidth in AC (voltage/current) = 3kHz.

Apparent AC Power:

Ranges: 5 to 5999VA, 6.00 to 59.99kVA, 60.0 to 599.9kVA, 600kVA.
Accuracy: ±(2% R + 10cts) for 5-5999VA, ±(2% R + 3cts) for 6.00-600kVA.
Resolution: 1VA, 10VA, 100VA, 1000VA.
Note: Bandwidth in AC (voltage/current) = 3kHz.

Apparent AC+DC Power:

Ranges: 5 to 5999VA, 6.00 to 59.99kVA, 60.0 to 599.9kVA, 600 to 900kVA.
Accuracy: ±(2% R + 10cts) for 5-5999VA, ±(2% R + 3cts) for 6.00-900kVA.
Resolution: 1VA, 10VA, 100VA, 1000VA.
Note: Displays OL above 900kVA in single-phase (1000V x 900A). Bandwidth in AC (voltage/current) = 3kHz.

Reactive AC Power:

Ranges: 5 to 5999 var, 6.00 to 59.99 kvar, 60.0 to 599.9 kvar, 600 kvar.
Accuracy: ±(2% R + 10cts) for 5-5999 var, ±(2% R + 3cts) for 6.00-600 kvar.
Resolution: 1 var, 10 var, 100 var, 1 kvar.
Note: Bandwidth in AC (voltage/current) = 3kHz.

Reactive AC+DC Power:

Ranges: 5 to 5999 var, 6.00 to 59.99 kvar, 60.0 to 599.9 kvar, 600 to 900 kvar.
Accuracy: ±(2% R + 10cts) for 5-5999 var, ±(2% R + 3cts) for 6.00-900 kvar.
Resolution: 1 var, 10 var, 100 var, 1 kvar.
Note: Displays OL above 900 kvar in single-phase (1000V x 900A). Bandwidth in AC (voltage/current) = 3kHz.

Power Factor:

Range: -1.00 to +1.00.
Accuracy: ±(3% R + 3cts) for 0 to 50% of range, ±(2% R + 3cts) for 50 to 100% of range.
Resolution: 0.01.
Note: Displays "----" if calculation is impossible (OL, forced to zero).

Frequency Measurements:

Voltage Range: 5.0 to 599.9Hz, 600 to 5999Hz, 6.00 to 19.99kHz.
Accuracy: ±(0.4% R + 1ct).
Resolution: 0.1Hz, 1Hz, 10Hz.
Current Range: 5.0 to 599.9Hz, 600 to 2999 Hz.
Accuracy: ±(0.4% R + 1ct).
Resolution: 0.1Hz, 1Hz.
Note: Displays "----" if input signal is too low (V<3V or I<3A) or frequency < 5Hz.

Specifications in THDr:

Range: 0.0 to 100%.
Accuracy: ±(5% R ±2cts) in voltage, ±(5% R ±5cts) in current.
Resolution: 0.1%.

Specifications in THDf:

Range: 0.0 to 1000%.
Accuracy: ±(5% R ±2cts) in voltage, ±(5% R ±5cts) in current.
Resolution: 0.1%.
Note: Displays "----" if input signal is too low (V<5V or I<6A) or frequency < 5Hz.

Indication of Phase Order:

Frequency Range: 47 to 400Hz.
Acceptable Voltage Range: 50 to 1000V.
Acquisition Duration Period: ≤500ms.
Validity Duration Period: Approx. 10s at 50Hz, 2s at 400Hz.
Acceptable Phase Unbalance: ±10.
Acceptable Amplitude Unbalance: 20%.
Acceptable Level of Harmonics in Voltage: 10%.

Usage Features:

Rotary Switch: Six positions for selecting measurement functions (OFF, V, Ω, A, W, 1-2-3Φ).
Function Buttons:
- HOLD: Stores the last value on the display, performs DC zero correction, lead resistance compensation.
- Yellow Button (Second Function): Selects AC/DC/AC+DC measurement types, configures default values, cycles through continuity/resistance/diode test, resets phase order indication, displays total 3-phase power.
- Backlight Button: Enables/disables display backlighting (auto-disabled after 2 minutes).
- MAX/MIN/PEAK Button: Activates detection of MAX, MIN, PEAK+ (maximum instantaneous peak), and PEAK- (minimum instantaneous peak) values. Disables Auto Power Off.
- Hz Button: Performs frequency measurements, selects harmonic distortion measurements (THDf, THDr), displays powers (W, VA, var, PF). Not functional in DC mode.
- AREL Button: Stores a reference value, displays differential and relative values. Not functional in phase rotation mode.
Terminals: COM (black) and + (red) input terminals for voltage, resistance, continuity, and diode measurements.
Jaws: Opened by a trigger on the meter body for current measurements. Arrow on jaws indicates presumed direction of current flow. Optimal results when conductor is centered.
Configuration: Default parameters can be reset by holding the yellow button while turning the switch to A from OFF.
Auto Power Off: Enabled by default (10 minutes of inactivity). Can be disabled for certain modes (e.g., MAX/MIN/PEAK).
InRush Measurement: Initiated by a long press of the MAX/MIN/PEAK button in current mode. Measures starting or overcurrent.

Maintenance Features:

Battery Replacement: Indicated by a low battery symbol on the display. Requires unscrewing the battery compartment cover, replacing the 9V LF22 battery, and re-securing the cover. Test leads must be disconnected.
Cleaning: Disconnect all connections, set the switch to OFF. Use a soft cloth moistened with soapy water, rinse with a damp cloth, and dry thoroughly.
Calibration: Recommended at one-year intervals by the factory Service Center or as required by internal procedures. An NIST traceable certificate can be requested.
Repair: Requires obtaining a Customer Service Authorization Number (CSA#) from the Service Department before returning the instrument.
Safety Precautions: Emphasizes reading the manual, not using in explosive atmospheres, observing voltage/current limits, not using if damaged, checking insulation, using rated leads, not modifying the instrument, and performing configuration when disconnected from dangerous voltages.