Isolation System DM-8000H

Isolation SystemDM-8000H

Features

• Frequency bandwidthDC~500MHz
• Multi-channel simultaneous measurement(2ch~24ch)
• High voltage measurement and operation parts are separated with fiber-optic isolation
• The high voltage measurement part is battery operated (continuous operation for about 12 hours)

Ideal for these applications

• Simultaneous measurement of the upper and lower arm signals of inverters
• Power module loss measurement
• Long-distance surge measurement of switches, etc. (maximum transmission distance 200m)
• Lightning surge waveform observation

Advantages of complete isolation

When measuring the Vce and Vge of the upper arm of an inverter, it is necessary to measure the gate voltage and the collector voltage based on the output waveform. It is dangerous to use the single-ended input probe supplied with an oscilloscope so it cannot be used.

In the past, differential probes have been used for such measurements, but due to in-phase removal ratio and in-phase voltage resistance constraints, waveforms become distorted and it has been difficult to ensure sufficient measurement bandwidth.
In this isolation system, optical fiber and battery-powered isolation allow accurate signal observation without the above constraints.

System configuration example

3-phase inverter upper and lower arm simultaneous measurement

Simultaneous measurement of Vce, Vge, Ic, and output voltage and current waveforms of the inverter upper and lower arms is possible. In addition, parameters such as dv/dt, di/dt, and power loss can be measured.

Measurement screen example

[Click the image to enlarge. ]

Product name		Order number	Qty.
	Main unit	DM-8000H	1
	Acquisition control card	DM-610A	1
	Transceiver card	DM-600A	4
	Isolation unit(16ch)	DM-900A	8
	Optical fiber cable(5m)	DM-005	8

Single-phase inverter upper and lower arm simultaneous measurement

Product name	Order number	Qty.
Main unit	DM-8000H	1
Acquisition Control card	DM-610A	1
Transceiver card	DM-600A	1
Isolation unit(4ch)	DM-900A	2
Optical fiber cable(5m)	DM-005	2

Long-distance multi-point surge measurements such as switches

In surge measurements for switches, when the distance between the high-voltage measurement part and the operation part is separated, it is possible to measure a distance of up to 200m by extending the optical fiber cable.

Product name	Order number	Qty.
Main unit	DM-8000H	1
Acquisition Control card	DM-610A	1
Transceiver card	DM-600A	1
Isolation unit(4ch)	DM-900A	2
Optical fiber cable(100m)	DM-009	2