miniLAB 1008 User's Guide
Functional
Details
Analog input terminals (CH0 In - CH7 In)
Connect up to eight analog input connections to the screw terminal connections labeled
CH0 In
through
CH7 In
. Refer to the
on page 4-6 for the location of
these pins.
You can configure the analog input channels as eight single-ended channels or four
differential channels. When configured for differential mode, each analog input has
12-bit resolution. When configured for single-ended mode, each analog input has 11-bit
resolution, due to restrictions imposed by the A/D converter.
Single-ended configuration
When all of the analog input channels are configured for single-ended input mode, eight
analog channels are available. In single-ended mode, the input signal is referenced to
signal ground (GND). The input signal is delivered through two wires:
The wire carrying the signal to be measured connects to CH# IN.
The second wire connects to GND.
The input range for single-ended mode is ±10 V, max, with a gain of 2. No other gains
are supported in single-ended mode.
Figure 4-4
Figure 4-4. Single-Ended Measurement Connection
illustrates a typical single-ended measurement connection.
GND
CH0
CH1 (differential configuration)
1.5
+
-
Single-ended measurements using differential channels
To perform a single-ended measurement using differential channels, connect the voltage
to an analog input with an even-number, and ground the associated odd-numbered
analog input. This configuration is shown in Figure 4-4.
4-7