Omega Engineering OMB-DBK-34A, User Manual

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4. Verify the jumper position for each input channel.
-
JP1 for channel 0
-
JP21 for channel 1
-
JP41 for channel 2
-
JP61 for channel 3
Low-Pass Filter Selection (Analog Input Circuit Only)
The low-pass filter removes high-frequency noise that could otherwise fool
the DBK7 into detecting a higher frequency. To set the low-pass
filter:
1. Determine the highest frequency you expect
to measure on each input channel.
2. Select the next higher cutoff frequency (30 Hz,
300 Hz, or 100 kHz) for each corresponding channel
(see figure
Typical Sine-Wave Sensitivity vs Frequency
later in this section). Verify that the DBK7’s sensitivity
will accommodate the expected input signal strength.
Default
100 kHz
3. Set jumpers for low-pass filter selection.
- JP2 for channel 0
- JP22 for channel 1
- JP42 for channel 2
- JP62 for channel 3
Card Connection
After the DBK7 hardware is configured, the card can be safely connected to the signal inputs and to the
primary acquisition device. You can connect up to four sensors to the DBK7’s input BNC connectors.
A CA-37-x (or CA-131-x) cable is used to connect the card to a LogBook or Daq device [possibly through
an expansion module] via the card’s DB37 connector. Connection steps follow.
WARNING
Electric shock hazard! Do not exceed a sensor input of 30 Vrms (42 Vpeak, 84 Vp-p)
for analog or
±
15 Volts for digital. Exceeding these values may present an electric
shock hazard that could possibly result in injury or death, in addition to DBK7
damage.
Connect the DBK7 card as follows:
1. Connect each sensor’s BNC connector to a mating connector on the card. Channel labels (CH0 to
CH3) are printed just below the corresponding connector. Label each sensor with its corresponding
channel, card sub-address, and DBK7 input channel.
2. For a single DBK7 card, connect one end of the P1 cable to the card’s male DB37 output connector.
For DaqBook applications - use a CA-37-1 cable
•
•
•
•
For DaqBoard/2000 Series or /2000c Series boards - use a CA-37-1 with a DBK200 Series
adapter
For DaqBoard [ISA type] boards - use a CA-131-1 cable
For Daq PC-Card, use a CDK10 (expansion, power module) with CA37-1 and CA-134
cables.
DBK Option Cards and Modules
879895
DBK7, pg. 7