Specifications

OWNER’S GUIDE  CONDITIONERS, DAQ | 13343
tion) are checked. The table below shows the shunt calibration result for typical strain gage resistor values.
Strain gage resistor Shunt resistor Result
120 Ω 50 kΩ 0.6 mV/V
120 Ω 100 kΩ 0.3 mV/V
350 Ω 50 kΩ 1.74 mV/V
350 Ω 100 kΩ 0.87 mV/V
The shunt resistor check is not possible in inductive bridge operation mode.
Cal
Independent of the value of the input signal, the CAL function sets the output to 80% of the actual range.
The base of this calibration signal is the excitation voltage. Therefore this is an easy check of the excitation
voltage. The typical reasons why the excitation is not working are short curcuit of the excitation at the cabling
or sensor defects, too high a load for the excitation amplier (please decrease the excitation level), or wrong
settings of the synchronization mode (no master assigned).
Synchronizing multiple ampliers
Due the high amplication of strain gage ampliers it is needed to synchronize the excitation voltage if mul-
tiple channels are used. This is done with Pin 8 of the back plane connector. See the detailed DAQ modules
manual for details about how to set up the synchronization of multiple DAQP-CFB modules.
Sensor connections
Inductive half bridge sensors LVDT sensors