|
High precision bench instrument |
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 features |
•
Accuracy: 5 mK
• Resolution: 1 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
|
|
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 |
|
Technical data |
The
following specifications are only valid for a nominal
operating voltage and a environmental temperature
of 23°C. |
|
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 -50°C up to
250°C) |
|
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 |
|
Order No. |
5020-0900 |
