DDM 1000 Precision Thermometer for Laboratory and Quality Assurance

The DDM 1000 is designed for precise temperature measurements as demanded in calibration-laboratory use and quality assurance. The accuracy is adapted to the uncertainties of fix-point-cells for precise sensor calibrations. Pt 10-, Pt-25- and Pt 100-Sensors can be used
 at the same time. The resolution of up to 0,02 mK often is needed in physical and chemical laboratories.

Product Description

Specification

Order Information

Main Features

• Accuracy: 0,1 mK
• Resolution: 0,02 mK
• Range: -220 °C to +1200 °C
• Pt100, -25 and Pt10-Sensors
• 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

Delivery:

Model : DDM 1000

Order No

5020-1000

Measuring range	-200°C up to 962°C (according to ITS-90)  -200°C up to 850°C (according to DIN EN60751)
Resolution	1 mK
Measuring uncertainty	10 mK (optionally 5 mK in the range of -50AC up to 250AC)
Measuring channels	2 (optionally up to 81 with external multiplexers)
Sensors	Pt-100/Pt-25/Pt-10 in a four-conductor-technology
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	260 x 80 x 240 (width x height x depth in mm)
Weight	about 2,5 kg
Technical data	The following specifications are only valid for a nominal operating voltage and a environmental temperature of 23AC.
Available accessoires	- external multiplexers with 8 or 16 channels   (up to 5 switches may be cascade-connected) - PC software for operation of instrument and measuring data acquisition - temperature sensors