int rn_anaInRdCalib(int handle, int channel,
int opmode, int gaincode, rn_AinData *adata,
int reserved);
Reads the calibration constants, gain, and offset from a device with analog inputs.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to estab-
lish the handle.
channel is the analog input channel number (0 to 7) corresponding to AIN0–AIN7
channel
0
1
2
3
4
5
6
7
SINGLE
+AIN0
+AIN1
+AIN2
+AIN3
+AIN4
+AIN5
+AIN6
+AIN7
DIFF
+AIN0 -AIN1
+AIN2 -AIN3
+AIN4 -AIN5
+AIN6 -AIN7
mAMP
+AIN0
+AIN1
+AIN2
+AIN3
+AIN4 *
+AIN5 *
+AIN6 *
+AIN7 *
* These channels need to be configured for current measurements
as explained in Section 3.4.1.
opmode is the mode of operation for the specified channel:
RNSINGLE —single-ended input line
RNDIFF —differential input line
RNmAMP —4–20 mA input line
gaincode is the gain code of 0 to 7 (use a gain code of 4 for 4–20 mA operation)
Gain Code
Multiplier
Voltage Range
Single-Ended Differential
0
1
2
3
4
5
6
7
×1
×2
×4
×5
×8
×10
×16
×20
0–20 V
0–10 V
0–5 V
0–4 V
0–2.5 V
0–2 V
0–1.25 V
0–1 V
± 20 V
± 10 V
±5V
±4V
± 2.5 V
±2V
± 1.25 V
±1V
rn_AinData *adata is a pointer to the structure where the calibration constants, gain, and offset
are written to after being calculated
reserved is reserved for future use. Set to 0.
User ’s Manual
75
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