VTI Instruments EX1000A, Руководство пользователя

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EX10xxA Function Calls 231
vtex10xxA_set_channel_conversion
F
UNCTION
P
ROTOTYPE
ViStatus vtex10xxA_set_channel_conversion(ViSession vi , ViInt32 channels[] , ViInt32 numChannels , ViInt32
eu_conv );
F
UNCTION
P
ARAMETERS
vi = contains a session handle to the instrument. This handle is obtained by the function and remains valid until the
session is closed.
channels = the list of channels to which to apply the filter frequency selection. The list of channels can include
channels not currently in the scan list and can be a subset of the channels in the scan list.
numChannels = the length of the channels array. Value must be an integer in the range of 1 to 48.
eu_conv = an integer output value representing the EU conversion. Valid return values: 0 through 10. See
Description for more information.
D
ATA
I
TEM
R
ESET
V
ALUE
eu_conv = VTEX10XXA_CONV_MV for all channels
D
ESCRIPTION
This function sets the EU conversion for the specified channels. For the eu_conv parameter, the following values are
valid:
Decimal
Value
Hex
Value
#define eu_conv Description
0 0x00 VTEX10XXA_CONV_MV Voltage
1 0x01 VTEX10XXA_CONV_THERMO_TYPE_J Type J
2 0x02 VTEX10XXA_CONV_THERMO_TYPE_K Type K
3 0x03 VTEX10XXA_CONV_THERMO_TYPE_T Type T
4 0x04 VTEX10XXA_CONV_THERMO_TYPE_E Type E
5 0x05 VTEX10XXA_CONV_THERMO_TYPE_B Type B
6 0x06 VTEX10XXA_CONV_THERMO_TYPE_S Type S
7 0x07 VTEX10XXA_CONV_THERMO_TYPE_R Type R
8 0x08 VTEX10XXA_CONV_THERMO_TYPE_N Type N
9 0x09 VTEX10XXA_CONV_USER_DEF0 User-defined 0
10 0x0A VTEX10XXA_CONV_USER_DEF1 User-defined 1
NOTE To meet the accuracy specifications in the Thermocouple Accuracy in Table 1-2, the 67 mV range
must be used. Using other voltage settings for EU conversion will reduce the accuracy of the
measurements. See
E
XAMPLE
// channels 0-4 are E, channels 5-8 are T
#define TYPE_E 0x04
#define TYPE_T 0x03
ViInt32 e_channels[5] = { 0, 1, 2, 3, 4 };
vtex10xxA_set_channel_conversion(vi, e_channels, 5, TYPE_E);
ViInt32 t_channels[4] = { 5, 6, 7, 8 };
vtex10xxA_set_channel_conversion(vi, t_channels, 4, TYPE_T);