Isolation SystemDM-8000H
Supports wide-band, multi-channel simultaneous measurement and ultra-high-voltage floating measurementFeatures
- 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 |
