The new OMB-DBK81/82/83/84 are designed to provide very low noise thermocouple and milli-volt measurements, with high accuracy and very close tracking between channels. These new models provide thermocouple accuracy of better than 0.5°C, and noise that is typically less than 0.2°C p-p, with no digital averaging required.
The performance of these new OMB-DBK cards is enabled through their use of very low-noise amplifiers on every channel. Built-in cold junction compensation and software-based linearization automatically provides you with quiet and stable temperature measurements, with no need to deal with the usual complexities associated with thermocouple measurements.
All software that supports the OMB-DAQBOARD-2000 Series and OMB-LOGBOOK also support these new OMB-DBK options, providing you with accurate and stable temperature readings on every channel. Four different models are offered so you can choose the one that best fits your application.
The OMB-DBK81 provides 7 differential thermocouple/mV inputs, and installs into any OMB-LOGBOOK and OMB-DBK enclosure. The OMB-DBK81 provides on-board screw-terminals for connection of thermocouple/ mV signals directly to the card.
The OMB-DBK82 provides 14 differential channels of thermocouple/mV inputs, and is physically taller than other OMB-DBK cards. The OMB-DBK82 installs into an OMB-DBK60 where it can be wired directly to the mini-thermocouple connector panels. Note that the OMB-DBK82 will not install into a single-height slot in the OMB-DBK10. Further, the OMB-DBK82 consumes two expansion slots in the OMB-DBK41 10-slot enclosure.
Specifications System Connector: All OMB-DBK options have a DB37 male, which mates with P1 on the OMB-DAQBOARD-2000, OMB-LOGBOOK or other OMB-DBK options. Thermocouple/mV Connector: OMB-DBK81: Board-mounted screw-terminals OMB-DBK82: Board-mounted screw-terminals OMB-DBK83: External pod-mounted removable screw-terminals OMB-DBK84: Mini-thermocouple connectors Input Types: Thermocouple types J, K, T, E, S, B, N; x100 (voltage)
Maximum Working Voltage (signal + common mode): ±10V Over-Voltage Protection: ±40V
Power Requirements: OMB-DBK81:35mA max from ±15V; 2mA max from ±5V OMB-DBK82: 60mA max from ±15V; 2mA max from ±5V OMB-DBK83: 60mA max from ±15V; 2mA max from ±5V OMB-DBK84: 60mA max from ±15V; 2mA max from ±5V Operating Temperature: 0 to 50°C (32 to 122 °F) Voltage Accuracy: ±(0.2% of rdg + 50 mV) Minimum Resolution:0.1°C for all thermocouple types Thermocouple Accuracy: valid for one year, 18 to 28°C