Operation
4.3 Analyzer Functions
LDS 6
50
Operating Instructions, 01/2009, A5E00295894-05
2 Diagnostics Values
2 Diagnostics Val. Ch1 NH
3
1.000 m
Measuring Path
1013 mbar (absolute)
Pressure
314.0 °C
Temperature
98.00 %
Relative Transmission
101.3 Units
Absolute Transmission
You can use this function to display internal diagnostic values. These may be of
interest when assessing faults or for adjustment operations.
The absolute transmission is expressed in arbitrary units.
The relative transmission is expressed as a percentage of the nominal value.
The temperature and pressure reflect the measured or set conditions at the
measurement point, and the measuring path the effective length of the path.
Table 4- 4
3 Logbook
3 Logbook Ch1 NH
3
...Continue
X
Page 1
Signal quality
W3 12-11-03 23:54 +
Signal quality
W3 12-11-03 23:55 -
Optomodule Fault
S1 13-11-03 16:37 +
Optomodule Fault
S1 13-11-03 16:43 +
You can use this function to display logged messages. Any event which leads to a
maintenance request (W) or fault message (S) is listed in the logbook (for a more
detailed description of error handling see the chapter Alarms.
Limit alarms (LIM), transmission alarms (TR), and function check (CTRL) are also
recorded. However, these do not trigger a maintenance request or fault message.
The soft key can be used to acknowledge the respective fault entry. The dot will then
disappear. A "+" sign at the end of the entry means an activated alarm, a "-" sign an
inactivated alarm.
The logbook contains a maximum of ten pages, each of which can accommodate four
messages. It operates according to the principle of a circulating buffer, i.e. the oldest
message is overwritten when all ten pages are full (40 messages). Fault messages
are not deleted if they have not been acknowledged.
The logbook entries can be deleted or blocked (function 60), or also switched off
individually (function 88).
Note
If a fault occurs when the error message is switched off by function 88, there is no reaction at
the interface. This applies to the analog as well as to the relay outputs.
4 Display Measuring Ranges
4 Disp. Meas.Range Ch1 NH
3
0.00 100.0 mg/Nm
3
Start End value
You can use this function to display measuring ranges. However, you cannot use this
menu to modify the measuring ranges. To do so use function 41. The follwoing
parameters are displayed.
Start Value
This value corresponds to a 4mA current on the analog output.
End Value
This value corresponds to a 20mA current on the analog output.
See also
Alarms (Page 65)