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OCM-622 Precision Resistance Decade
Model OCM-622 is high accuracy resistance decade box with range from 1 Ohm to 1.2
MOhm. Basic accuracy is 0.005 %, best resolution on the lowest range is 10 µOhm.
Decade is formed from high stable foil resistors switched with combination of relays.
Build-in software contains function of RTD temperature sensor simulation with
parameters according to IEC (DIN) or US standards, temperature setting in degree
of Celsius or Fahrenheit.
Decade is supplied from internal accumulator or from external power line adapter.
Both model with RS-232 interface and GPIB bus is available.
Decade box is perfect for calibration laboratories for ohmmeter and multimeter
testing and for industry as device for quality testing as well.
Technical data
| Resistance range |
1 Ohm - 1.2 MOhm |
| Range of Pt sensor temperature simulation |
-200°C - +850°C |
| Range of Ni sensor temperature simulation |
-60°C - +300°C |
| Types of sensors |
Pt10 to Pt10000, Ni10 to Ni10000 |
| Temperature scales |
PTS68, ITS90 |
| Pt sensor standards |
DIN (1,385), US (1,392) |
| Ni sensor standards |
DIN 43760 (6180) |
| Connection |
2 and 4-wire |
| Remote control |
RS-232, optionally GPIB |
| Supplying |
internal ACCU/power line adapter (100-240V/50-60Hz) |
| Dimensions |
W 325 mm, H 111 mm, D 316 mm |
Resistance accuracy in 4-wire connection
| Resistance range |
Accuarcy |
| 1 - 400 Ohm |
0.003 % + 3 mOhm |
| 400 - 2000 Ohm |
0.005 % |
| 2000 - 10000 Ohm |
0.015 % |
| Maximal thermoelectric voltage on output terminals is less than 1 µV. |
Resistance accuracy in 2-wire connection
| Resistance range |
Accuarcy |
| 1 - 2 000 Ohm |
0.005 % + 10 mOhm |
| 2 - 200 kOhm |
0.005 % |
| 200 - 1 200 kOhm |
0.01 % |
| Maximal thermoelectric voltage on output terminals is less than 5 µV for resistances
below 2 kOhm, and less then 15 µV for resistances up to 1.2 MOhm. |
Accuracy of Pt sensor simulation
| Temperature |
Pt100 |
Pt200 |
Pt500 |
Pt1000 |
Pt10000 |
| -200 ... 200°C |
0.02°C |
0.02°C |
0.02°C |
0.04°C |
0.04°C |
| 200 ... 500°C |
0.03°C |
0.04°C |
0.06°C |
0.1°C |
0.06°C |
| 500 ... 850°C |
0.04°C |
0.06°C |
0.15°C |
0.2°C |
0.1°C |
! Application software included !
OCM-622 Modification
| OCM-622 |
Decade with RS-232 |
| OCM-622 GPIB |
Decade with interface GPIB |
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Indietro
