Kele KCO-NO2, Руководство пользователя

Страница: 9 / 16

KCO-NO2 User’s Manual
90-0201-01 Kele • 3300 Brother Blvd. • Memphis, TN 38133
Page: 9
WWW.KELE.COM
The controller has four factory-preset, pairs of warning and alarm levels for each gas (see Figure 8).
Each setting determines both the sensor’s warning and alarm thresholds (see
Section 4.2 ).
When the concentration of either CO or NO
2
rises above its configured warning threshold, the
WARNING relay output is activated.
When either CO or NO
2
concentration rises above its alarm threshold, the controller’s ALARM
relay is also activated (refer to Section 4.2 ).
When both the CO and NO
2
concentrations are below the warning threshold, the WARNING relay
is deactivated; the same action occurs for the ALARM relay.
The front cover has two LEDs indicators, one for the CO and the other for the NO
2
sensor module.
These LEDs illuminate different colors to indicate normal (green), warning (yellow), alarm (red)
and error (blinking red) conditions (see Table
3
).
The concentrations of CO and NO
2
in the ambient air are reported at each senor’s analog output.
The analog outputs range from 4 to 20mA during normal operation (see Table 4).
4.2 Startup
At startup, the controller has a short (less than 1 minute) warm-up period before it begins normal
operation; during this time the controller will:

Illuminate both the CO and NO
2
status LEDs green

Output the minimum value of 4mA for both CO and NO2. Analog outputs.

Deactivate both the Alarm and Warning relay outputs.