- OMEGA OMB-DBK Option Cards/Module User Guide

DBK Option Cards and Module 879895 DBK16, pg. 31
Periodic Calibration Without Trimpots
Once the trimpots have been adjusted during initial installation, periodic trimming can be performed
through LogView’s 2-Point software calibration. The LogView procedure does not require the use of
trimmpots and should not be confused with the 2-point method discussed in this section of the manual.
Refer to the LogView chapter in the LogBook User’s Manual for information regarding 2-point calibration
via software.
DBK16 – Specifications
Name/Function: 2-Channel Strain-Gage Input Card
Input Connectors: Screw terminals for signal connections
Output Connector: DB37 male, mates with P1 using CA-37-x cable
Number of Channels: 2
Excitation Voltage Range: 1.50 to 10.50 VDC @ 50 mA (on-board adjustment for external source)
Gain Range: ×100-1250
Types of Bridges Accommodated:
Full Bridge, Kelvin Excitation (6-wire)
Full Bridge (4-wire)
Half Bridge (3-wire)
Quarter Bridge (2-wire)
Bridge Resistors: On-board provisions for 4 bridge-completion resistors per channel.
Type Input: Differential DC
Input Impedance: 100 MΩ (in parallel with 150 pF)
CMRR: 115 dB
Excitation Voltage Source: External 13-18 VDC @ 50 mA/circuit
Excitation Current Output: 50 mA max, current limited at 60 mA
Excitation Sensing: Local or Remote
Excitation Regulation:
Line Regulation: 0.025%
Load Regulation: 0.05%
Reference Voltages: 2.500 VDC
Reference Accuracy: 0.05%
Reference Drift: 3 ppm/ºC
Gain Calibration Reference: 5.00 mVDC
Reference Accuracy: 0.2%
Reference Drift: 20 ppm/ºC
Committed instrumentation amplifier [for each section], with a gain adjust
from ×100 to ×1250 via externally accessed 15-turn trimpot.
Gain Accuracy: 0.5%
Gain Drift: 50 ppm/ºC
Input Offset: 100 µV max
Offset Drift: 4 µV/ºC
Output Offset: 20 µV
Offset Drift: 200 µV/ºC
Offset Adjustment: 0-100% of range, 0-5.00 VDC (15-Turn trimpot)
Full-Scale Sensitivity Range:
@ 5.00 VDC Excitation: 0.8 to 10 mV/V
@ 10.00 VDC Excitation: 0.4 to 5 mV/V
Scaling Amplifier Gain Range: ×1 to ×10 (15-Turn trimpot)
Low-Pass Filter: 3 pole Butterworth, User By-Passable;
-9dB @ User-set Corner Frequency