ACD-330T Amprobe, ACD-330T Datasheet - Page 25

• Manufacturer Part Number: ACD-330T
• Description: DMM CLAMP-ON W/BACKLIGHT
• Manufacturer: Amprobe
• Type: Digital (DMM)r

Specifications of ACD-330T

• Includes: Battery, Case, Test Leads
• Style: Clamp
• Display Digits: 4
• Display Type: LCD, Bar Graph
• Function: Voltage, Current, Resistance, Frequency
• Functions, Extra: Continuity, Diode Test
• Features: Auto Off, Backlight, Hold, Min/Max/Ave
• Ranging: Auto/Manual
• Response: True RMS
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption
• Display Count: -
• Other names: 2730749

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 ".
or measurement will not be accurate.
3) Observe the display for true RMS current.
4) Repeat your measurement for each phase to determine balance. Imbalanced phases
and/or harmonics can cause neutral currents.
5) Observe the display for true RMS current reading. If the phases are balance, any sig-
nificant current flow on the neutral may indicate the presence of harmonic currents.
7) Press and hold the SHIFT button (>lsec) to enter the PEAK mode (DH MAX dis-
played). Measure the halfcycle PEAK current. Divide first reading into the second read-
ing to determine crest factor,A crest factor other than 1.4 is an indication of harmonic cur-
and average values.
10) Press and hold the HOLD/ MAX • MIN button (>lsec) to exit recording.
2) Clamp around a phase wire of the transformer. Be sure the jaws are completely closed
6) Press the HOLD/ MAX • MIN button to freeze the digital display.
rent.
8) Press and hold the SHIFTbutton (>lsec) to exit the PEAK mode.
9) Press and hold the HOLD/ MAX • MIN (>lsec) to enter dynamic recording mode.
Momentarily press HOLD/ MAX • MIN button to review recorded maximum, minimum,
DISTRIBUTION TRANSFORMER MEASUREMENT
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