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Detecting an open loop on a voltage input – Burkert Type 8619 User Manual

Page 99

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97

Adjustmentandcommissioning

Diagnostics

AI1/AI2

Mx:Inputs

Thresholds:

None
Low

Warn low:

ENTERING

Warn high:

ENTERING

Err low:

ENTERING

Err. high:

ENTERING

High
Both

if "Thresholds" = "Low" or "Both"

if "Thresholds" = "High" or "Both"

if "Thresholds" = "Low" or "Both"

if "Thresholds" = "High" or "Both"

A malfunction in your process may be revealed by too low or too high value received on the analogue input.

To be warned when the value received on the analogue input is out of range:

choose which thresholds have to be monitored, in the "Thresholds" function, and then

set one or two threshold values outside of which the multiCELL generates a "warning" event and displays the
icons

and

;

set one or two threshold values outside of which the multiCELL generates an "error" event and displays the
icons

and

X

.

When a "warning" or "error" event is generated by the multiCELL:

go into the "Information" menu to read the cause of generation of this event;

correct the problem according to the instructions given in chap. 9.3.

• The "warning" event may also be associated with one and/or other digital outputs. See chap. 8.10.22.

• A current of 22 mA may be emitted on one and/or other of the current outputs when an "error" event related

to either the monitoring of the fluid pH, redox, conductivity or temperature values or the monitoring of an
analogue input is generated. See chap. 8.10.21 to activate the mode.

• See also "If you encounter problems", chap. 9.3

WARN. LOW: Enter the analogue input value below which a "warning" event is generated.
WARN. HIGH: Enter the analogue input value above which a "warning" event is generated.
ERR. LOW: Enter the analogue input value below which an "error" event is generated.
ERR. HIGH: Enter the analogue input value above which an "error" event is generated.

8.12.3. Detecting an open loop on a voltage input

This function is available for an analogue input configured in "voltage" mode.

Refer to chap. 8.9 to access the Diagnostics menu.

Diagnostics

AI1/AI2

Mx:Inputs

Open loop:

ON/OFF

ON/OFF : Activate or deactivate the open loop detection.
When the function has been activated, an "error" event is generated and the message "Mx:E:AIx open" registered
in the data logger if no source is connected to the voltage input or if the wiring is incorrect.

Type 8619

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