LabJack LJU3-LV, Руководство пользователя

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Code Description
1 SCRATCH_WRT_FAIL
2 SCRATCH_ERASE_FAIL
3 DATA_BUFFER_OVERFLOW
4 ADC0_BUFFER_OVERFLOW
5 FUNCTION_INVALID
6 SWDT_TIME_INVALID
7 XBR_CONFIG_ERROR
16 FLASH_WRITE_FAIL
17 FLASH_ERASE_FAIL
18 FLASH_JMP_FAIL
19 FLASH_PSP_TIMEOUT
20 FLASH_ABORT_RECEIVED
21 FLASH_PAGE_MISMATCH
22 FLASH_BLOCK_MISMATCH
23 FLASH_PAGE_NOT_IN_CODE_AREA
24 MEM_ILLEGAL_ADDRESS
25 FLASH_LOCKED
26 INVALID_BLOCK
27 FLASH_ILLEGAL_PAGE
28 FLASH_TOO_MANY_BYTES
29 FLASH_INVALID_STRING_NUM
40 SHT1x_COMM_TIME_OUT
41 SHT1x_NO_ACK
42 SHT1x_CRC_FAILED
43 SHT1X_TOO_MANY_W_BYTES
44 SHT1X_TOO_MANY_R_BYTES
45 SHT1X_INVALID_MODE
46 SHT1X_INVALID_LINE
48 STREAM_IS_ACTIVE
49 STREAM_TABLE_INVALID
50 STREAM_CONFIG_INVALID
51 STREAM_BAD_TRIGGER_SOURCE
52 STREAM_NOT_RUNNING
53 STREAM_INVALID_TRIGGER
54 STREAM_ADC0_BUFFER_OVERFLOW
55 STREAM_SCAN_OVERLAP
56 STREAM_SAMPLE_NUM_INVALID
57 STREAM_BIPOLAR_GAIN_INVALID
58 STREAM_SCAN_RATE_INVALID
59 STREAM_AUTORECOVER_ACTIVE
60 STREAM_AUTORECOVER_REPORT
63 STREAM_AUTORECOVER_OVERFLOW
64 TIMER_INVALID_MODE
65 TIMER_QUADRATURE_AB_ERROR
66 TIMER_QUAD_PULSE_SEQUENCE
67 TIMER_BAD_CLOCK_SOURCE
68 TIMER_STREAM_ACTIVE
69 TIMER_PWMSTOP_MODULE_ERROR
70 TIMER_SEQUENCE_ERROR
71 TIMER_LINE_SEQUENCE_ERROR
72 TIMER_SHARING_ERROR
80 EXT_OSC_NOT_STABLE
81 INVALID_POWER_SETTING
82 PLL_NOT_LOCKED
96 INVALID_PIN
97 PIN_CONFIGURED_FOR_ANALOG
98 PIN_CONFIGURED_FOR_DIGITAL
99 IOTYPE_SYNCH_ERROR
100 INVALID_OFFSET
101 IOTYPE_NOT_VALID
102 TC_PIN_OFFSET_MUST_BE_4-8
112 UART_TIMEOUT
113 UART_NOT_CONNECTED
114 UART_NOT_ENABLED
5.4 - Calibration Constants
This information is only needed when using low-level functions and other ways of getting binary readings. Readings in volts already
have the calibration constants applied. The UD driver, for example, normally returns voltage readings unless binary readings are
specifically requested.
Calibration Constant
The majority of the U3's analog interface functions return or require binary values. Converting between binary and voltages
requires the use of calibration constants and formulas.
When using ModBus the U3 will apply calibration automatically, so voltages are sent to and read from the U3, formatted as a float.
Which Constants Should I Use?
The calibration constants stored on the U3 can be categorized as follows:
Analog Input
Analog Output
Internal Temperature
Analog Input: Since the U3 uses multiplexed channels connected to a single analog-to-digital converter (ADC), all low-voltage
channels have the same calibration for a given configuration. High-voltage channels have individual scaling circuitry out front, and
thus the calibration is unique for each channel. The table below shows where the various calibration values are stored in the Mem
area. Generally when communication is initiated with the U3, four calls will be made to the ReadMem function to retrieve the first 4
blocks of memory. This information can then be used to convert all analog input readings to voltages. Again, the high level
Windows DLL (LabJackUD) does this automatically.
Analog Output: Only two calibrations are provided, one for DAC0 and one for DAC1.
Internal Temperature: This calibration is applied to the bits of a reading from channel 30 (internal temp).
U3 Input Ranges
The U3 input ranges can be found in section 2.6.2 of the User's Guide. For your convenience, that table has been provided again
below.
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