Seaward ClareHAL - Manual (Page 160)

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arc_detect
For HV tests this is the arc detection level, 0 through 9. Set to 0 to
disable arc detection, otherwise 1 is the most sensitive detection level,
and 9 is the least sensitive level.
For EBOND and PWR tests this field is reserved and should be set to
zero.
Channel
For HV tests:
For a basic HAL this must be 0
For a HALSCAN use 0 through 4 represent the required
connection
For a G2 use 0 for the front panel connection, and 1 for the rear
connection
For EBOND tests the channel must be 0.
For PWRLK and PWRLK tests 0 represents standard polarity, and 1 for
reverse polarity.
For interim ACKs and final ACKs, the tester responds with the data
content representing the following structure. Again, multi-byte values
are in big-endian order.
typedef struct _sssack_haltest {
u8 test_state;
u16 test_time; // Test time in tenths of a second
union {
u16 w; // Generic access
u16 test_volts; // HIPOT/DCIR: Applied test volts
u16 milli_aps; // EBOIND: Applied test current
} test_applied;
union {
float r; // Generic access
float milli_amps; // Measured HIPOT leakage
float mega_ohms; // Measured DCIR value
float milli_ohms; // Measured earth bond resistance
} test_reading;
} sssack_haltest;
The time and readings are either the latest values (interim ACK), or the
values captured at the end of the hold phase (final ACK). Do not use
the values within a final ACK if the test was aborted (determined by
inspecting the test state).
Your HAL tester