Brugg Pipesystems GERMANPIPE LMS 120, Инструкция по эксплуатации и обслуживанию

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Operating and service instructions | LMS 120 11
4.4.1. Auto settings
Menu item 11 sets default values depending on the type of monitoring system. Under menu item 12 , the device
parameters are reset to factory settings. An overview of the default values can be found in Table 3 on page 9.
4.4.2. Channel settings
The type of the monitoring system is selected in menu items 21 and 31 . Following this selection the limits for
isolation and loop monitoring are limited to sensible levels.
Isolation alarm - menu 22/ 32
The limit for triggering an alarm can be set with the keys. If the
measurement for the isolation resistance falls below the limit, the LMS 120
switches to alarm .
Possible settings:
NORDIC/ SWISS/ BRANDES: 10 k Ω … 20 M Ω
Loop alarm - menu 23/ 33
The limit for triggering an alarm can be set with the keys. If the
measurement for the loop resistance exceeds the limit, the LMS 120 switches
to alarm .
Possible settings:
NORDIC/ SWISS: 200 Ω , 300 Ω , 500 Ω
BRANDES: 1 k Ω … 19 k Ω
Tolerance alarm - menu 24/ 34
The tolerance for triggering an alarm can be set with the keys. It is
selected in percent of the limit for the loop resistance.
If the measurement for the loop resistance exceeds or falls below the range,
the LMS 120 switches to alarm .
Possible settings:
NORDIC/ SWISS: not available
BRANDES: above limit, 10% ... 50%
When
above limit , only the top limit has effect, which is determined by menus 23 and 33.
Example;
Loop limit: 4.0 k Ω
Tolerance: 10%
Bottom limit: 3.6 k Ω
Top limit: 4.4 k Ω
If the measurement falls below 4.4 k Ω or if it falls below 3.6 k Ω , the LMS 120 switches to alarm.