Meilhaus Electronic redlab 1208fs, Руководство пользователя

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RedLab 1208FS User's Guide Functional Details
17
Analog input terminals (CH0 IN - CH7 IN)
You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 (
CH0 IN
through
CH7 IN
.) Refer to the pinout diagrams on page 16 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. The input signal is referenced to signal ground (GND), and delivered through two wires:
ƒ The wire carrying the signal to be measured connects to CH# IN.
ƒ The second wire connects to AGND.
The input range for single-ended mode is ±10 V. No other ranges are supported in single-ended mode. Figure 5
illustrates a typical single-ended measurement connection.
Figure 5. Single-ended measurement connection
Battery voltage should read as expected when the hardware is configured for single-ended mode.
Single-ended measurements using differential channels
To perform a single-ended measurement using differential channels, connect the signal to "CHn IN HI" input,
and ground the associated "CHn IN LO" input.
Differential configuration
When all of the analog input channels are configured for differential input mode, four analog channels are
available. In differential mode, the input signal is measured with respect to the low input.
The input signal is delivered through three wires:
ƒ The wire carrying the signal to be measured connects to CH0 IN HI, CH1 IN HI, CH2 IN HI, or
CH3 IN HI.
Pin 1
CH0
Pin 3
GND