Measurement Computing E-1608 User Manual page 14

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E-1608 User's Guide
Leave unused input channels either floating or tied to an AGND terminal. Source impedances should be kept as
small as possible to avoid settling time and accuracy errors.
Figure 4 shows DIFF channels 0-3 connected to a ground path resistor.
Channel-Gain queue
The channel-gain queue feature allows you to configure a list of channels, modes, and gains for each scan. The
settings are stored in a channel-gain queue list that is written to local memory on the device.
The channel-gain queue list contains one or more channel numbers, modes, and range settings. You can
configure up to 8 elements. The channels can be listed in any order, and can include duplicate channels for
sampling at different ranges.
An example of a 4-element list is shown in the table below.
Carefully match the gain to the expected voltage range on the associated channel or an over range condition
may occur. Although this condition does not damage the device, it does produce a useless full-scale reading,
and can introduce a long recovery time due to saturation of the input channel.
For more information about analog signal connections
For more information about analog input connections, refer to the Guide to DAQ Signal Connections (this
document is available on our website at www.mccdaq.com/signals/signals.pdf).
www.MicroDAQ.com
Figure 4. DIFF connections with ground path resistor
Sample channel gain queue list (SE mode)
Element Channel
0 CH5
1 CH1
2 CH3
3 CH5
14
Range
BIP5V
BIP10V
BIP1V
BIP5V
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Functional Details