- Omega 8 Channel Thermocouple USB Data Acquisition Module User's Guide

TC-08 User's Guide36

3.3.4.3

usb_tc08_legacy_get_temp

short usb_tc08_legacy_get_temp

(

long * temp,

short handle,

short channel,

short filtered

)

Once you open the driver and define some channels, you can call the

usb_tc08_legacy_run routine. The driver will then constantly take readings from the

USB TC-08. Temperatures are returned in hundredths of a degree Celsius and

voltages are returned in microvolts.

Arguments

channel

Specifies from which channel to read temperature. Should

be 0 for CJC, 1 for Channel 1, 2 for Channel 2 and so on.

temp

Pointer to a location where readings are to be placed. Each

reading should be compared with 2147483647L or

LONG_MAX (include limits.h) to check for overflows. An

overflow occurs when the input signal is higher than the

measuring range of the USB TC-08.

filtered

Specifies whether or not to filter the data. The readings

are median filtered if set to 1. 0 causes the unfiltered

temperature to be stored in temp. The filter has a depth

defined by the filter factor, set during a

usb_legacy_set_channel call.

Returns

Use usb_tc08_get_last_error.

Temperature retrieval successful.

Note: Do not call this function unless you are operating the USB TC-08 in legacy

mode, having called usb_tc08_legacy_run.