Omega Engineering OMB-DBK-34A, User Manual

Page: 192 / 250

“Mode = SetInputGain,” 5 milli-Volt Reference Route
3. Turn off all the channels in the system except for those DBK43A channels that are to be adjusted.
4. Click the Download button to send the current configuration to the LogBook.
5. Select Indictors \ Enable Input Reading Column from the menu bar to display the values for each
channel.
6. For the associated channel, set the voltage to [G
I
* G
F
* 0.005] for each transducer by adjusting the
trimpot labeled GAIN. Use the Input Amplifier Gain (G
I
) calculated earlier.
Note: If the filter is enabled, the filter gain (G
F
) is 2; otherwise G
F
= 1.
Example 1: If G
I
= 250 and the filter is disabled;
the GAIN trimpot would be adjusted to obtain 1.25V.
Example 2: If G
I
= 250 and the filter is enable; the GAIN trimpot would
be adjusted to obtain 2.50V.
7. Select Indictors \ Disable Input Reading Column from the menu bar.
Adjust the Scaling Amplifier Gain
Adjust the Scaling Amplifier Gain as follows:
1. In the Param1 column (see page 19 for location), select all of the DBK43A channels that are to be
adjusted.
2. Select Mode = SetScalingGain from the drop down list above the grid. This selection commands the
calibration multiplexer to route a 5mV reference through all of the amplification stages as shown
below.
“Mode = ScalingGain
,”
5 milli-Volt Reference Route
DBK16, pg. 24
879895
DBK Option Cards and Modules