Measurement Computing DBK81 - Manual

DBK81, DBK82, and DBK83
Thermocouple Cards
DBK81 – 7 Channel Card
DBK82 – 14 Channel Card
DBK83 – 14 Channel Card with
External Connection Pod
Overview …… 1
Hardware Setup …… 2
Card Connection …… 2
Open Thermocouple Detection …… 3
Installing the DBK82 in the DBK41 Enclosure ……3
Using the Connection POD, DBK83 Only…… 4
POD-1 Dimensions ….. 5
Card Configuration …… 6
DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration …… 6
DaqBook/2000 Series and DaqBoard/2000 Series Configuration …… 6
Software Setup …… 7
Using a Temperature Calibrator …… 8
DBK81, DBK82, DBK83 – Specifications …… 9
Reference Notes:
o Chapter 2 includes pinouts for P1, P2, P3, and P4. Refer to pinouts applicable to
your system, as needed.
o In regard to calculating system power requirements, refer to DBK Basics located
near the front of this manual.
Overview
The DBK81, DBK82, and DBK83 are used in temperature measurement applications that make use of
thermocouples. The DBK81 provides connections for 7 thermocouples. Both the DBK82 and the DBK83
provide connections for 14 thermocouples. The two 14 channel cards differ from each other in that the
input connectors of the DBK82 are on the board, but connectors of the DBK83 are located in an external
connection pod.
All three cards feature on-board cold junction compensation (CJC) for direct measurement of type J, K, T,
E, N28, N14, S, R, and B thermocouples. The following table provides the temperature range for each of
these thermocouple types.
Thermocouple Temperature Ranges
T/C Type J K T E N28 N14 S R B
Temperature
Range °C -200 to
760 -200 to
1200 -200 to
400 -270 to
650 -270 to
400 0 to
1300 -50 to
1768 -50 to
1768 50 to
1780
Temperature
Range °F -328 to
1400 -328 to
2192 -328 to
752 -454 to
1202 -454 to
752 32 to
2372 -58 to
3214 -58 to
3214 122 to
3236
The three DBK cards connect to external thermocouples via channels, as follows:
• DBK81 – up to seven thermocouples can be connected, using channels 1 through 7, inclusive
• DBK82 and DBK83 - up to fourteen thermocouples can be connected, using channels
1 through 7 for the first seven and channels 9 through 15 for the second set of seven.
Note: On the DBK81, there is one CJC. It is measured on channel 0. On the DBK82 and DBK83 there
are two CJCs, measured on channels 0 and 8.
In addition to thermocouple measurements, each input channel can be configured for a fixed voltage gain
of 100. When in this mode, voltage can be measured in the range of ±100 mV, or ±50 mV, depending on
the type of Daq device being used.
Up to sixteen DBK81, DBK82, or DBK83 cards can be attached to a single LogBook or Daq device,
providing up to 224 temperature channels. The cards need not be the same. For example, you could have
ten DBK81 cards, three DBK82 cards, and three DBK83 cards in one system.
DBK Option Cards and Modules 989494 DBK81, DBK82, and DBK83 pg. 1