Lighthouse ApexPortable Operating Manual
A-14 248083440-1 Rev 5
Note: Particle data is a
cumulative raw count
regardless of the
instrument’s settings.
The timestamp field indicates when the data record was recorded.
Timestamps are stored as the number of seconds since 1/1/1970, the
Unix time epoch. This value can be written directly into a C/C++
time_t data type to be used by ANSI C time functions.
Device Status Word
The registers used for the Sample Status Word are 30007-30008 to
sample status.
The bit order of the Device Status Word is 7 to 0 (right to left), where
bit 7 is the most significant bit and bit 0 is the least significant bit.
The bits within the Device Status Word are flagged to indicate
particular conditions of the currently indexed data record.
If multiple states occur, the bits are added together. For example, a
Flow Alert and a Particle Overflow would return a value of 6 in register
30008 (bits 1 and 2 are set TRUE).
14 ApexPortable:
Photodiode health status
0 = Photodiode good. 1 = Photodiode failure
16 ApexPortable:
Calibration due date status
0 = Unit has not passed calibration date. 1 = Unit has
passed calibration.
Table A-13: Instrument Current Status
Value Action
Table A-14 Device Status Word
Bit Description
0 LASER Alert Status
0 = LASER is good 1 = LASER Alert
1 Flow Alert Status
0 = Flow Rate is good 1 = Flow Rate Alert
3 Instrument Service Status
0 = Working correctly 1 = Instrument malfunction detected.
4 Particle Threshold Exceeded Status
0 = Threshold not exceeded 1 = Threshold exceeded
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