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desA
m
desB
m
<ETX>”
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 <ETX> 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
NN
EVF
<CR> or
NN
EVN
<CR> command is
received by the instrument, the new events list is reset and
a following
NN
EVN
<CR> command will be answered
with “
NN
<STX>0<ETX>” if no event took place in the
meantime. Thus, if the answer to
NN
EVN
<CR> com-
mand is not received correctly, to update a remote monitor
for events, the
NN
EVF
<CR> command for the whole
event log file must be used.
Note
After a reset of the instrument, the answer to
NN
EVN
<CR>
is the same as
NN
EVF
<CR> (all events are new).
Note
A modified record due to the closing of an error is not trans-
mitted by
NN
EVN
<CR>, so again the
NN
EVF
<CR> com-
mand is needed.
A small subset of the event log file, with information about
the active errors, can be downloaded through the
NN
AER
<CR> command. The answer is:
“
NN
<STX>
C
1
C
2
C
3
C
4
C
5
C
6
<ETX>”
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”.