Amprobe DM-III S Power Quality Recorder

 Amprobe DM-III S
The DM-IIIS represents a new approach to the world of electrical measurement. Computer assisted instruments such as the DM-IIIS permit an easy and fast analysis of a huge quantity of data.

The DM-IIIS is able to:

• Display in real time the electrical parameters of a single phase and three-phase systems (with or without neutral wire) and the harmonic analysis of voltages and currents
• Conduct a direct Energy measurement (without memorizing).
• Memorize (pressing SAVE key) the sampled values of the Parameters present at the instrumentﾒs input generates a "Smp" record inside the instrumentﾒs memory. It will be possible to analyze the memorized data ONLY by transferring it to a PC.
• Record simultaneously (pressing the START key after a proper setting): RMS values of voltages, currents, corresponding harmonics, active, reactive and apparent powers, power factors and cos?, active, reactive and apparent energies, voltage sag and surge with 10ms resolution. It will be possible to analyze the recorded data ONLY by transferring them to a PC.

Voltage Measurement

Range	Accuracy	Resolution	Input impedance
15-370V	±(0.5%+2digit)	0.2V	300kO (phase-neutral) 600kO (phase-phase)
310-635V		0.4V

Voltage anomoalies detection (manual selection of range)
Voltage

Range	Accuracy	Resolution	Input impedance
15-370V	±(0.5%+2digit)	0.2V	300kO (phase-neutral) 600kO (phase-phase)
30-635V		0.4V

Time

Accuracy (ref. to 60Hz)	Resolution
±8.33ms (½ period of fundamental)	8.33ms (½ period of fundamental)

Current measurement (using external transducer)

Range	Accuracy	Resolution	Input impedance	Protection against overloads
0.005-0.26V	±(0.5%+2digit)	0.0001V	100kO for STD or FlexEXT 8.3kO for FlexINT (1000A) 9.4kO for FlexINT (3000A)	5V
0.26-1V		0.0004V

Minimal Current measurable is equal to 0.5% of Clamp Full Scale

Power measurement (cosf: 0.5c ﾖ 0.5i)

Value	Ranges	Accuracy	Resolution
Active power	0 ﾖ 999.9W 1KW ﾖ 999.9KW 1MW ﾖ 999.9MW	±(1.0%+2digit)	0.1W 0.1KW 0.1MW
Reactive power	0 ﾖ 999.9VAR 1KVAR ﾖ 999.9KVAR 1MVAR ﾖ 999.9MVAR		0.1VAR 0.1KVAR 0.1MVAR
Apparent power	0 ﾖ 999.9VA 1KVA ﾖ 999.9KVA 1MVA ﾖ 999.9MVA		0.1VA 0.1KVA 0.1MVA
Active energy	0 ﾖ 999.9Wh 1KWh ﾖ 999.9KWh 1MWh ﾖ 999.9MWh		0.1Wh 0.1KWh 0.1MWh
Reactive energy	0 ﾖ 999.9VARh 1KVARh ﾖ 999.9KVARh 1MVARh ﾖ 999.9MVARh		0.1VARh 0.1KVARh 0.1MVARh

Cosf measurement

Cosf	Resolution	Uncertainty (expressed in degrees)
0.20	0.01	1.0
0.50		0.7
0.80		0.6

Harmonics measurement
Voltage

Range	Accuracy	Resolution
DC ﾖ 25h 26h ﾖ 33h 34h ﾖ 49h	±(5.0%+2digit) ±(10.0%+2digit) ±(15.0%+2digit)	0.1V

The voltage harmonics will be null under the following threshold:
- DC: if <1V or <2% of 1st harmonic
- 1st harmonic: if <2V
- 2nd divided by 49th: if <1V or <2% 1st harmonic

Current

Range	Accuracy	Resolution
DC ﾖ 25h 26h ﾖ 33h 34h ﾖ 49h	±(5.0%+2digit) ±(10.0%+2digit) ±(15.0%+2digit)	0.1A

The voltage harmonics will be null under the following threshold:
- DC: if <2% of 1st harmonic or <0,2% of clamp full scale
- 1st harmonic: if < 0,2% of clamp full scale
- 2nd Divided by 49th: if <2% 1st harmonic or <0,2% of clamp full scale
Setting the FLEX option the DC componenet will be ignored

Frequency measurement
Instrument set to 50Hz

Range	Resolution	Accuracy
47 ÷ 53	0,1 Hz	±(1.0%+1digit)

Instrument set to 60Hz

Range	Resolution	Accuracy
57 ÷ 63,6	0,1Hz	±(1.0%+1digit)

General Specifications

Mechanical features
Dimensions:	8.9ﾔ(L) x 6.5ﾔ (La) x 4.1ﾔ(H)  225(L) x 165(La) x 105(H) mm
Weight:	3.3 Lb (1.5kg)
Internal power supply	6 batteries 1.5V series AA LR6
Battery Life:	50 hours
External power supply	Use only Amprobe power supply Adapter code DMT-EXTPS
Display:	dot matrix with backlight
Resolution	128 x 128 dots (16384 dots)
Dot size	0.5mm x 0.5mm
Visible area	2.9ﾔ x 2.9ﾔ (73mm x 73mm)
Sampling speed:	130.21usec a 60Hz.
No. of samples per period	128
Clamp (FLEX3)
Maximum diameter of the cable:	5.9ﾔ (150 mm)
Operating conditions
Reference temperature:	73°F ± 2°F (23°C ± 1°C)
Operating temperature:	32°F to 122°F (0°C to 50 °C)
Relative humidity:	<70%
Storage temperature:	14°F to 140°F (-10°C to 60 °C)
Storage humidity:	<80%

For full Amprobe DM-III specifications, please click here: Amprobe DM-III

Amprobe DM-III S Three Phase Power Quality Recorder

Display in real time the electrical parameters of a single phase and three-phase systems (with or without neutral wire) and the harmonic analysis of voltages and currents

Includes (3) Amprobe DM-CT-HT Current Clamps, Carrying Case & Accessories As Listed

DMIII S DM III

Amprobe DM-III S DM III S Power Quality Recorder Models On Sale Warranty Calibration Backed by The Best Service and Lowest Prices in the Industry.

BC# 15943

• Amprobe DM-III S Digital Recorder (BC# 15943)
• (3) Amprobe DM-CT-HT Current Clamps
• (4) Amprobe Test Leads w/ Alligator Clips
• AC Adapter/Charger
• Power Cord
• RS232 PC Interface Cable
• User Manual On CD-ROM
• Carrying Case w/ Strap

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