Hanna Instruments HI 720 Instruction Manual page 15
Conductivity process controller with inductive probe
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Also See for HI 720:
- Instruction manual (84 pages) ,
- Manual (2 pages) ,
- Instruction manual (2 pages)
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( 3 )
When a wrong setup code or value is confirmed, the controller does not
move from the current window, and displays a blinking WRONG message till the
user changes the value. Note that the allowed values for some parameters de-
pend from other settings (e.g. to set a high setpoint to 10.00 mS, first set the
high alarm to a value greater than 10.00 mS).
( 4 )
Each time the controller is powered, the RTC is checked to detect if an RTC
reset occurred since last software initialization. If that happened, the RTC is ini-
tialized with the default date and time (01-01-2000 ; 00:00).
An EEPROM reset does not affect the RTC settings.
( 5 )
The error configuration value is always displayed together with each error
configuration item, and is coded as shown on this table
Error
Alarm
22 mA
Config. Relay
fault curr. fault curr. mode
00
OFF
OFF
01
ON
OFF
02
OFF
ON
03
ON
ON
04
OFF
OFF
05
ON
OFF
06
OFF
OFF
07
ON
OFF
08
OFF
ON
09
ON
ON
10
OFF
OFF
11
ON
OFF
12
OFF
OFF
13
ON
OFF
14
OFF
ON
15
ON
ON
16
OFF
OFF
17
ON
OFF
18
OFF
OFF
19
ON
OFF
20
OFF
ON
21
ON
ON
28
3.6 mA
Hold
Auto-
cleaning sending
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
ON
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
ON
ON
OFF
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
Error
Config. Relay
22
23
24
25
26
27
28
29
30
31
32
SMS
33
34
OFF
35
OFF
36
OFF
37
OFF
38
OFF
39
OFF
40
OFF
41
OFF
42
OFF
43
OFF
44
OFF
45
OFF
46
OFF
47
OFF
OFF
Note that the values in this table are used for error configuration through RS485.
OFF
( 6 )
The hold mode is never enabled by the control timing if the "hold time
OFF
start" is the same as the "hold time end". Items C.41 and C.42 apply to all days.
OFF
The hold mode can be enabled all day long by using items C.51 to C.57.
OFF
OFF
( 7 )
See "Temperature Compensation" section for more details about Auto-
matic and Manual temperature compensation functioning.
OFF
OFF
( 8 )
Whenever the measurement type (G.00) is changed, all conductivity and
Alarm
22 mA
3.6 mA
fault curr. fault curr. mode
OFF
OFF
ON
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
Hold
Auto-
SMS
cleaning sending
ON
ON
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
29
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