Hanna Instruments HI 720 Series User Manual
Page 33
64
65
desD
i
(calibration)
USED FOR COND. CALIBRATION ONLY
Cell constant or installation factor value
desD
i
(cleaning)
Not use
d
Events are logged in the event log file in chronological order, i.e. record number
1 refers to the oldest event. When the event log file is full, the oldest event is
replaced with the oncoming one.
The characters of the answer to the EVF command may be separated by delays,
because it is necessary to guarantee the execution of measurement and control
tasks while sending the long (and time consuming) answer.
A small subset of the event log file, with information about the active errors, can
be downloaded through the AER
ing controlling.
The answer is: “NN
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
de-
scribed below (e.g. B
2
= 0x1D, C
3
= “1”, C
4
= “D”), C
5
C
6
are the ASCII repre-
sentation 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
High alarm
B
3
bit 1
Low alarm
B
3
bit 2
Maximum relay ON time exceeded
B
3
bit 3
Life check error
B
3
bit 4
Conductivity input underflow
B
3
bit 5
Conductivity input overflow
B
3
bit 6
free for future use (and set to 0)
B
3
bit 7
free for future use (and set to 0)
B
2
bit 0
Calibration time-out
B
2
bit 1
Temperature probe broken
B
2
bit 2
free for future use (and set to 0)
B
2
bit 3
Digital transmitter error
B
2
bit 4
Power reset
B
2
bit 5
EEPROM corruption
B
2
bit 6
Watchdog reset
B
2
bit 7
Temperature level
B
1
bit 0
User compensation table temperature error
The meaning of “start_date
i
” and “start_time
i
” is:
• for errors: date and time at which the error was generated
• for setup events: date and time of a setup item change
• for calibration events: date and time of a calibration
• for cleaning events: start date and time of cleaning action
The meaning of “end_date
i
” and “end_time
i
” is:
• for errors: end date and time if the error is not active anymore
• for setup events: not used
• for calibration events: not used
• for cleaning events: not used
The token format is described here below:
event_code
i
(errors)
“E”
event_code
i
(setup)
“S”
event_code
i
(calibration)
“C”
event_code
i
(cleaning)
“L”
desA
i
(errors)
Error code label
(e.g. “Error 21”)
desA
1
(setup)
Group label
(e.g. “Control”)
desA
i
(calibration)
Calibration type
(e.g. “Conductivity calibrated”)
desA
i
(cleaning)
Cleaning type
(e.g. “Simple cleaning”)
desB
i
(errors)
Error description (e.g. “Temperature level”)
desB
1
(setup)
Item description
(e.g. “Control enable”)
desB
i
(calibration)
Not used
desB
i
(cleaning)
Not used
start_date
i
ddmmyy
(e.g. “010705” for July 1, 2005)
start_time
i
hhmm
(e.g. “1735” for 5:35 pm)
end_date
i
(active errors)
Not used
end_date
i
(not active err.)
ddmmyy
(e.g. “020705” for July 2, 2005)
end_time
i
(active errors)
Not used
end_time
i
(not active err.)
hhmm
(e.g. “0920” for 9:20 am)
desC
i
(errors)
Not used
desC
1
(setup)
Item prev. value
(e.g. “Off”)
desC
i
(calibration)
Calibration point (e.g. “solution: 0, 1413 uS”)
desC
i
(cleaning)
Not used
desD
i
(errors)
Not used
desD
1
(setup)
Item new value
(e.g. “On”)