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? AIN_CALMA_CH.C —Demonstrates how to recalibrate a 4–20 mA A/D converter channel
using two known currents to generate constants for that channel that are rewritten into the
A/D Converter Card flash memory. The currents being monitored will be displayed contin-
uously.
Before you run this sample program, place jumpers across pins
1–2, 3–4, 5–6, and 7–8 of header JP1 on the A/D Converter
Card. Connect an external power supply (make sure the power
supply is set at 0 V and is turned off) between one of the analog
0?10 V
500 W
0
A
AIN x
input channels and GND with a 500 ? resistor and an ammeter
connected as shown in the diagram. If you do not use the 500 ?
GND
resistor to simulate a 4–20 mA current source from a voltage
swing of 0–10 V, your power supply voltage output cannot exceed 2.0 V.
Now power up the master and the A/D Converter Card, and compile and run the sample
program. Turn the external power supply on and follow the prompts in the Dynamic C
STDIO window.
? AIN_CALSE_ALL.C —Demonstrates how to recalibrate all the single-ended A/D con-
verter channels for one gain using two known voltages to generate constants for each chan-
nel that are rewritten into the A/D Converter Card flash memory. A hardware reset will be
issued to complete writes to flash memory once the constants are written, and the hardware
watchdog will be set.
Before you run this sample program, make sure your 0–10 V external power supply is off
and is set to 0 V. Connect the power supply between one of the AIN00–AIN07 analog
channels and GND. Connect a voltmeter across the power-supply connections.
Now power up the master and the A/D Converter Card, and compile and run the sample
program. Turn the external power supply on and follow the prompts in the Dynamic C
STDIO window.
? AIN_CALSE_CH.C —Demonstrates how to recalibrate one single-ended A/D converter
channel using two known voltages to generate constants for that channel that are rewritten
into the A/D Converter Card flash memory. A hardware reset will be issued to complete
writes to flash memory once the constants are written, and the hardware watchdog will be set.
Before you run this sample program, make sure your 0–10 V external power supply is off
and is set to 0 V. Connect the power supply between one of the AIN00–AIN07 analog
channels and GND. Connect a voltmeter across the power supply connections.
Now power up the master and the A/D Converter Card, and compile and run the sample
program. Turn the external power supply on and follow the prompts in the Dynamic C
STDIO window.
? AIN_RDDIFF_CH.C —Demonstrates reading a differential A/D converter channel using
two known voltages and constants for that channel. The voltage being monitored will be
displayed continuously in the STDIO window.
Before you run this sample program, make sure your 0–10 V floating-point external power
supply is off and is set to 0 V. Connect the power supply to one of the differential channel
pairs such as +AIN0 and –AIN1.
Now power up the master and the A/D Converter Card, and compile and run the sample
program. Turn the external power supply on and follow the prompts in the Dynamic C
STDIO window.
User ’s Manual
63
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