Hanna-instruments HI 720 Series Instrukcja Użytkownika Pobierz pdf (Strona 38)

(*): When the digital transmitter is used, these errors are generated in the digital

transmitter, but they are handled as if they were generated in the controller.

• The 3.6 mA fault current is always off unless the 4-20 mA output has been

configured; the 22 mA fault current is always off unless the 0-20 mA or 4-20

mA output has been configured.

The 3.6 mA and the 22 mA fault current cannot be both set to ON. If two

errors are active when output is configured as 4-20 mA (#1 or #2), and one

of them is configured for the 22 mA fault current, while the other one is config-

ured for the 3.6 mA fault current, the 22 mA current is let out to the analog

output.

The fault current is automatically disabled when the analog output is used for

controlling (item O.10 equal to “Control-setpoint 1”), no matter whether the

fault current itself has been configured “On” or “OFF”.

• In case of a “Temperature probe broken” error, the fault current, if configured,

is let out to both analog outputs (unless O.20 is equal to “Control-setpoint 2”).

In all the other cases only the first analog output can let out the fault current.

• The “GSM/Modem module error” is never activated if P.00 is not set to

“HI504900 GSM module” or “HI504901 GSM supervisor”. The error will be

active if the instrument is not able to communicate with the GSM/modem en-

gine (for example the serial cable is broken or the engine is not powered), if the

number of available SMS is finished (setup item P.14) or if the SIM expiration

date is overrun.

• The “Power reset” and the “Watchdog reset” errors are active only for the short

time of the start-up session (selftests, meter name and version displaying). That

start-up session ends when the first measurement is acquired and displayed.

• When the Hold mode is enabled for the “Life check error”, this error can be

closed automatically if the measurement vary enough.

Note The alarm relay (when configured to be activated) is de-energized

(fail-safe ON) continuously or with a pulse of about 5 seconds. This

parameter can be configured through setup item E.99 (Level or Pulse).

If the “Pulse” option is selected, a new pulse will be let out upon

every new error, no matter whether the red LED is already blinking

(i.e. some error is active) or not. When the pulse finishes, the relay is

energized but the error remains still active (red LED blinking) until

the error is closed.

Note The “Digital Transmitter error” is generated by one of the following

causes: 1. Digital transmitter is off

2. Connection problems between controller & transmitter

ALARM - ERROR CONFIGURATION

This section is dedicated to all the possible error causes for alarm generation,

and to the actions performed according to the alarm configuration (setup menu

“Error configuration”).

Each alarm cause can be referred to an error to which an error code is assigned

and which is logged in a dedicated memory space (see “Event logging” section

for more details).

Five configuring actions are foreseen upon generation of an alarm:

1. Alarm relay de-energized

2. Auto-cleaning (control actions are stopped during auto-cleaning mode)

3. 3.6 or 22 mA fault current for the 4-20 mA output; 22 mA fault current for

the 0-20 mA output

4. Hold mode (entered in any case for EEPROM corruption or serial bus error)

5. Alarm SMS submission to the selected phone numbers

Note The red LED flashes in any case upon an alarm generation, i.e. it

can not be disabled by changing the error configuration.

Errors, error codes & default error handling configuration are listed in this table:

ERROR Error Alarm 22 mA 3.6 mA Hold Auto- SMS

Code Relay Fault Fault Mode clean. Send

Curr. Current

Low alarm 01 ON OFF OFF --- OFF OFF

Max relay ON time 02 ON ON OFF --- OFF OFF

Life check error (*) 03 ON ON OFF ON OFF OFF

Cond. input overflow (*) 10 ON ON OFF OFF OFF OFF

Calibration timeout 12 OFF OFF OFF --- --- OFF

Broken temp. probe (*) 20 ON ON OFF OFF --- OFF

Temperature level 21 ON ON OFF --- --- OFF

Dig.Transmitter error 40 ON ON OFF ON --- OFF

GSM/Modem module err. 50 ON ON OFF --- --- ---

Temp. compensation error 60 ON ON OFF --- --- OFF

Temp. out of conc. table 61 ON ON OFF --- --- OFF

Cond. out of conc. table 62 ON ON OFF --- OFF OFF

Conc. out of conc. table 63 ON ON OFF --- --- OFF

Power reset 90 OFF OFF OFF --- --- OFF

EEPROM corruption 91 ON ON OFF --- --- OFF

Watchdog error 92 OFF ON OFF --- --- OFF

Level or pulse signal 99 Level (default value) or Pulse

1 2 ... 33 34 35 36 37 38 39 40 41 42 43

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