66
8024252/AE00/V1-0/2020-07| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-D
Subject to change without notice
9
STATUS MESSAGES
9
Status messages
9.1
Error messages
Error message
Relay contact Analog signal
output
Description
Hardware error
1-7
System error,
open
2.00 mA, if not
set otherwise
The error can occur at any time and signals a fault in one of the electronic
components. The O
2
sensor heating is switched off. Contact one of the
Sick Service points if the fault cannot be rectified by switching the system
off and on again.
Open circuit
thermocouple
System error,
open
2.00 mA, if not
set otherwise
The error can occur at any time and signals an interruption in the thermo-
element circuit. The O
2
sensor heating is switched off. It can be reset by
the user when the error cause has been eliminated.
Possible causes:
Contact problems of the thermoelement line on the
terminal points of the electronics or the probe, probe cable damaged or
thermoelement defective.
O
2
probe set point
temp. not reached
System error,
open
2.00 mA, if not
set otherwise
The error can occur during the heating process (max. 90 minutes) of the
O
2
sensor. The O
2
sensor heating is switched off. It can be reset by the
user to start a new heating attempt.
Possible causes:
Fuse F2 defective, contact problem of the O
2
sensor
heating cable on the terminals of the electronics or the probe, probe
cable damaged, short circuit thermoelement, reference air flow volume
greater than 60 l/h, power voltage too low, flow volume too high and/or
temperature in the process too low, electronics error.
O
2
probe tempera-
ture too low
System error,
open
2.00 mA, if not
set otherwise
The error can occur during measurement operation and indicates that the
O
2
sensor temperature has dropped 20 °C (68 °F) below the setpoint
temperature. The O
2
sensor heating is switched off. It can be reset by the
user to start a new heating attempt.
Possible causes:
Fuse F2 defective, contact problem of the O
2
sensor
heating cable at the terminals of the electronics or the probe, probe cable
damaged, short circuit thermoelement, reference air flow volume greater
than 60 l/h, power voltage too low, flow volume too high and/or
temperature in the process too low, electronics error.
O
2
probe tempera-
ture too high
System error,
open
2.00 mA, if not
set otherwise
The error can occur during measurement operation and indicates that the
O
2
sensor temperature has risen 20 °C (68 °F) above the setpoint
temperature. The O
2
sensor heating is switched off. It can be reset by the
user to start a new heating attempt.
Possible causes:
Process temperature too high, O
2
sensor heating cable
incorrectly connected to the control unit, electronic fault.
Open circuit
O
2
sensor
System error,
open
2.00 mA, if not
set otherwise
The error can occur at any time and signals an interruption in the circuit
of the O
2
sensor. It can be reset by the user when the error cause has
been eliminated.
Possible causes:
Contact problem of the O
2
sensor cable on the terminal
points of the electronics or the probe, probe cable defective, contact
problem of the inner part of the probe to the O
2
sensor.
O
2
sensor calibra-
tion failed
System error,
open
O
2
sensor adjustment failed for one of the following reasons. It can be
reset by the user; all entries subordinate to this error are then also reset.
Test gas flow rate
too low
System error,
open
The error can only occur during an O
2
sensor adjustment and signals an
insufficient test gas flow during the adjustment. It can be reset by the
user. A new successful adjustment also resets the error.
Possible causes:
Test gas cylinder empty, test gas flow volume incorrectly
set, test air flow volume incorrectly set, instrument air supply to the
system not available.
