DDM 900-8K, 8-channel bench thermometer, 1mK resolution
The DDM 900 is designed for precise temperature measurements as demanded in calibration-laboratory use and quality assurance.
Product features
- Resolution: 1 mK
- Range: -220 °C to +1200 °C
- Pt25 and Pt100
- User defined coefficients for ITS 90 and EN60751
- Fast measurements: up to 8/s
- Excellent long-time stability
- Compensation of self heating error
- No impairment of the measurement results through parasitic thermovoltage
- Extensible up to 81 measuring channels
- True 4-wire-technique with Lemo-plugs
- High EMC
- High data reliability in terms of sensor coefficients
Accessories such as e.g. multiplexers and sensors can be found in our reference temperature catalog. You can download it directly here
Order No.: 5020-0902
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Technical data
| Measuring range | -200°C up to 962°C (according to ITS-90) |
| Resolution | 1 mK |
| Measuring uncertainty | Pt25: 10 mK (5 mK -50°C...+250°C)
|
| Measuring channels | 8 (optionally up to 81 with external multiplexers) |
| Sensors | Pt-100, Pt500 and Pt1000 in 4-wire circiut |
| Connectors | Lemo 1S, quadripolar, in front panel |
| Measuring current | about 0,5 mA switched DC (about 1 mA for Pt-25) |
| Measuring time | about 1 sec. per channel, about 0,1 sec. per channel with reduced resolution |
| Long-term stability | 5 mK / year |
| Temperature coeff. | 1 mK/K |
| Display | LCD, LED backlight, 2 lines ¨¤ 16 characters, 9 mm height |
| Units | °C, °F, K, Ohm |
| Interface | RS-232, isolated |
| Operation | menu orientated, alternatively controllable by your PC |
| Memory | 128 KB (optionally 512 KB) |
| Suppy | 230 V, 50 Hz / 115 V, 60 Hz about 15 VA |
| Size | 300 x 160 x 300 (width x height x depth in mm) |
| Weight | 8.00 kg |