Measurement Computing DBK Part 2 - Manual (Page 161)

DBK84
14-Channel Thermocouple Module
Overview …… 1
Hardware Setup …… 2
Module Connection …… 2
Open Thermocouple Detection …… 3
Module Configuration …… 4
DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration …… 5
DaqBook/2000 Series and DaqBoard/2000 Series Configuration …… 5
Software Setup …… 6
Using a Temperature Calibrator …… 7
DBK84 – Specifications …… 8
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 DBK84 is used in temperature measurement applications and provides connections for 14
thermocouples through convenient mini-TC connectors.
The DBK84 features 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
Up to fourteen external thermocouples can be connected to the DBK84 module. Channels 1 through 7 are
used for the first seven thermocouples, and channels 9 through 15 are used for the second set of seven.
Note: DBK84 has two on-board CJCs. They are 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 DBK84 modules can be attached to a single LogBook or Daq device, providing up to 224
temperature channels.
DBK Option Cards and Module 989494 DBK84 pg. 1