Hanna Instruments HI 504910 - Manual (Page 25)

48 49
desA
m
desB
m
”
where m is the number of events. Each token is followed
by a blank space, except the last one (“desB
m
”), directly
followed by the character.
“new_events_no” is the number of new events and its
format is the ASCII format for a number (“1”, “2”.... “99”,
“100”).
When a NNEVF or NNEVN command is
received by the instrument, the new events list is reset and
a following NNEVN command will be answered
with “NN0” if no event took place in the
meantime. Thus, if the answer to NNEVN com-
mand is not received correctly, to update a remote monitor
for events, the NNEVF command for the whole
event log file must be used.
Note After a reset of the instrument, the answer to NNEVN
is the same as NNEVF (all events are new).
Note A modified record due to the closing of an error is not trans-
mitted by NNEVN, so again the NNEVF com-
mand is needed.
A small subset of the event log file, with information about
the active errors, can be downloaded through the
NNAER command. The answer is:
“NNC
1
C
2
C
3
C
4
C
5
C
6
”
where C
1
C
2
are the ASCII representation of byte B
1
described
below (e.g. B
1
= 0xF3 C
1
= “F”, C
2
= “3”), C
3
C
4
are the
ASCII representation of byte B
2
described below (e.g. B
2
= 0x1D
C
3
= “1”, C
4
= “D”), C
5
C
6
are the ASCII representation of
byte B
3
described below (e.g. B
3
= 0xBE C
5
= “B”, C
6
=
“E”).
The meaning of B
1
, B
2
, B
3
is:
B
3
bit 0 free for future use (and set to 0)
B
3
bit 1 free for future use (and set to 0)
B
3
bit 2 free for future use (and set to 0)
B
3
bit 3 Life check error
B
3
bit 4 pH electrode broken or leakage
B
3
bit 5 Reference electrode broken or leakage
B
3
bit 6 Old pH probe
B
3
bit 7 Dead pH probe
B
2
bit 0 No calibration
B
2
bit 1 Temperature probe broken
B
2
bit 2 free for future use (and set to 0)
B
2
bit 3 free for future use (and set to 0)
B
2
bit 4 Power reset
B
2
bit 5 EEPROM corruption
B
2
bit 6 Watchdog reset
B
2
bit 7 free for future use (and set to 0)
B
1
bit 0 free for future use (and set to 0)
B
1
bit 1 free for future use (and set to 0)
B
1
bit 2 free for future use (and set to 0)
B
1
bit 3 free for future use (and set to 0)
B
1
bit 4 free for future use (and set to 0)
B
1
bit 5 free for future use (and set to 0)
B
1
bit 6 free for future use (and set to 0)
B
1
bit 7 free for future use (and set to 0)
Each bit is equal to 1 if the correspondent error is ON
and equal to 0 if the correspondent error is OFF.
Note When a “NAK” or “CAN” char is sent, the whole instrument
reception buffer is cleared.
Note When the meter is receiving and answering to commands
other than “PHR”, “MVR”, “TMR”, “AER”, “STS”, the pri-
mary LCD of HI 504920 (in HI 504910 terminal mode) or
the primary LCD of HI 504910 displays “r485”.