HYDROCAL 1001+ Installation and operation manual Page 34/76
4.3.1.6. LED bar level - Gas
The HYDROCAL unit contains an additional LED bar level monitoring to give the user a rough over-
view of the absolute gas concentration, gas concentration daily trend and gas concentration weekly
trend. It is completely independent form the alarm level monitoring and is visualized with 1 green-
and 3 red single color LEDs. The gas concentration absolute, gas concentration daily trend and gas
concentration weekly trend have each 3 configurable levels (level 1 ... 3) but their status will be illus-
trated with the same 4 LEDs.
The LEDs illustrates the status of the gas concentration absolute as follow:
Gas sensor not active - measurement function stopped
Gas concentration < Level 1
Gas concentration < Level 2
Gas concentration < Level 3
Gas concentration ≥ Level 3
Gas sensor active - error
As the levels for gas concentration (absolute, daily- and weekly trend) can be reached in parallel the
individual status of the LEDs is illustrated as following color sequences:
Note: To keep it as simple as possible the levels of the gas concentrations (absolute, daily- and
weekly trend) are specified as follow in the color sequence tables:
0 < Level 1 (Level 1 not reached)
1 < Level 2 (Level 1 reached)
2 < Level 3 (Level 2 reached)
3 ≥ Level 3 (Level 3 reached)
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