Measurement Computing DBK Part 2 - Manual (Page 21)

DBK Option Cards and Module 899892 DBK43A & DBK43B, pg. 1
DBK43A and DBK43B
8-Channel Strain Gage Modules
Overview …… 1
Hardware Connection …… 3
Power Connection …… 3
Signal Connection …… 3
Hardware Configuration …… 4
Bridge Applications …… 5
AC Coupling and Low-Pass Filter Options …… 11
P1 Output Channel and Card Address Selection …… 12
DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration …… 12
DaqBook/2000 Series and DaqBoard/2000 Series Configuration …… 13
Hardware Adjustment …… 13
Trimpots …… 13
CAL/NORM, CAL1/RUN, and CAL2/RUN Switches …… 13
Software-Controlled Setup …… 14
Selecting Channel Types in DaqView, or A Typical Setup Procedure with Embedded Examples ……16
GageCal, Calibration Program for DBK16, DBK43A, & DBK43B in Daq Applications ……21
Calibrating DBK16, DBK43A, & DBK43B for LogBook Applications ……25
Overview …… 25
Calibration Methods …… 26
Procedures Common to All Calibration Steps (Required) …… 27
Nameplate Calibration and Manual Calibration …… 30
Channel Calibration Procedure …… 33
2-Point Calibration …… 36
Shunt Calibration …… 38
Creating a Units Conversion Transfer Function …… 40
Periodic Calibration Without Trimpots …… 41
Specifications …… 42
Reference Notes:
o In regard to calculating system power requirements, refer to the section Power
Requirements in the DBK Basics section located at the beginning of the manual.
o Chapter 2, System Connections and Pinouts, includes pinouts for P1, P2, P3, and
P4. Refer to the pinouts that are applicable to your system, as needed.
Note: Due to flexibility in configuration, please review the entire section before attempting setup and
operation.
Overview
The DBK43A and DBK43B will condition signals from most bridge-circuit transducers that have a signal
output of less than 50 mV. Strain gages and load cells are common types. We will use the terms:
module(s), gage module(s), and strain gage module(s) to refer to both units, except when a feature or
function is exclusive to a specific module.
Primary Differences between the DBK43A and DBK43B
• Time Stamping – Can be used with DBK43B; Stamping should not be used for DBK43A*
• Event Marking – Can be used with DBK43B; Marking should not be used for DBK43A*
• Input Signal Connectors – DBK43A uses a mini-DIN6 connector for each channel.
DBK43B uses a removable screw terminal block for each channel.
• Calibration Switches – DBK43B has a two calibration slide switches (CAL1 and CAL2). The
DBK43A has one CAL/NORM switch.
• Power LED – The DBK43A and DBK43B have different locations for the Power LED.
* In DBK43A – Time Stamping and Event Marking result in erroneous readings at the time of the stamping or marking.