ACDC-620T Amprobe, ACDC-620T Datasheet - Page 32

• Manufacturer Part Number: ACDC-620T
• Description: DMM CLAMP-ON TRMS
• Manufacturer: Amprobe
• Type: Digital (DMM)r

Specifications of ACDC-620T

• Includes: Battery, Case, Test Leads
• Style: Clamp
• Display Digits: 4
• Display Type: LCD, Bar Graph
• Display Count: 4000
• Function: Voltage, Current, Resistance, Capacitance, Temperature
• Functions, Extra: Continuity, Diode Test
• Features: Auto Off, Hold, Min/Max/Ave, Sleep
• Ranging: Auto/Manual
• Response: True RMS
• Frequency: 45 Hz to 65 Hz
• Maximum Ac Current: 1 KA
• True Rms: Yes
• Voltage: 400 V/100 V
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption
• Other names: 2730822

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You can measure current, phase imbalance between phases, and true RMS neutral
current. True RMS measurement yields the effective value.
1) Set the rotary switch to " A ".
2) Clamp around a phase wire of the transformer. Be sure the jaws are completely
3) Observe the display for true RMS current.
4) Repeat your measurement for each phase to determine balance. Imbalanced
5) Observe the display for true RMS current reading. If the phases are balance, any
6) Press the HOLD/MAX MINbutton to freeze the digital display.
7) Press and hold the SHIFTbutton (>I sec) to enter the PEAK mode (DH MAX dis
8) Press and hold the SHIFT button (>11 sec) to exit the PEAK mode.
9) Press and hold the HOLD/MAX MIN (> 1 sec) to enter dynamic recording
10) Press and hold the HOLD/MAX MIN button (> 1 sec) to exit recording.
DISTRIBUTION TRANSFORMER MEASUREMENT
closed or measurement will not be accurate.
played). Measure the half cycle PEAK current. Divide first reading into the sec
ond reading to determine crest factor. Acrest factor other than 1.4 is an indication
of harmonic current.
phases and/or harmonics can cause neutral currents.
significant current flow on the neutral may indicate the presence of harmonic cur
mode. Momentarily press HOLD/MAX MIN button to review recorded maxi
rents.
mum, minimum, and average values.
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