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K-O2 Wiring and Calibration Instructions
63.5
7.9
2.50
0.312 (4 PLS)
150.8
41.9
5.94
1.65
63.5
41.9
2.50
1.65
20.3
0.80
22.2
0.875 (4 PLS)
73.7
2.90
25.400
1.00
20.3
Conduit Knockout (4 PLS)
0.80
Air Vent (2 PLS)
K-O2 with hinged cover
A l a r m S e t t i n g s
WARNING /VENTILATION AND ALARM CONDITIONS
Two, 10 Amp, 120/277 VAC rated, dry-contact, SPDT relays activate during
warning/ventilation and alarm conditions: refer to (Section 3.2 of the Kele
K-O2 manual) for wiring information.
When the concentration of oxygen falls below its confi gured warning/
ventilation threshold, the WARNING/VENTILATION relay output is activated.
When the concentration falls below the alarm threshold, the controller's
ALARM relay is also activated. When the oxygen concentration rises above
the alarm threshold, the ALARM relay is deactivated; when it rises above
the ventilation threshold the WARNING/VENTILATION relay is also deacti-
vated.
SETTING VENTILATION AND ALARM THRESHOLDS
The four, factory-preset pairs of ventilation and alarm levels are shown in
Table 6. Each setting determines both the controller's warning/ventilation
and alarm thresholds.
The active threshold values are selected by setting the two DIP switches on
the main board as shown in the fi rst column of Table 6.
7.1
0.281 (4 PLS)
147.3
76.2
35.6
5.80
3.00
1.40
76.2
35.6
3.00
1.40
22.2
73.7
0.875 (4 PLS)
2.90
Conduit Knockout (4 PLS)
25.4
1.00
Air Vent (2 PLS)
K-O2 with screw cover
Dip switch
Setting
Table 6
Dry contact output
Present on relay 277 V AC,10A
Warning
Alarm
4-20 mA output
Present on analog
20 mA=>25%
<4 mA => sensor failed
Power 24 V AC/DC
OXYGEN %
Warn
Alarm
20.5
20.0
20.3
20.0
20.0
19.5
19.8
19.5
FIGURE 9: Location of SPAN & ZERO Controls
Electrical installation
•
Always install in accordance with local and national electrical
codes. If in doubt about the code requirements of your ap-
plication, consult a licensed electrician.
•
Both K-O2 enclosure styles have standard ½" conduit knock-
outs on all sides for power and signal wiring. Do not use the
vent openings for wiring.
Power connection
•
The K-O2 Series of sensors can be powered from 20 to 30 Volts
AC or DC. The operating power is connected to the two-posi-
tion screw terminal connector marked "24 VAC/DC"
K - O 2 C a l i b r a t i o n
SENSOR CALIBRATION
The sensor requires calibration at
the specifi ed calibration interval to
ensure its accuracy is maintained
over its life. Calibration is a two-step
process that provides the sensor
module with oxygen-free (or zero)
gas, and then a specifi c concentra-
tion (or span) gas. Two calibration
buttons (ZERO and SPAN) are pro-
vided on the main board as shown in
Figure 9.
Related Manuals for Kele K-02 Series
Summary of Contents for Kele K-02 Series
- Page 1 Two, 10 Amp, 120/277 VAC rated, dry-contact, SPDT relays activate during Setting The sensor requires calibration at warning/ventilation and alarm conditions: refer to (Section 3.2 of the Kele OXYGEN % the specifi ed calibration interval to K-O2 manual) for wiring information.
- Page 2 Calibration Kit UCK-3 kit been kept and the unit is in standby for two minutes while the sensor re-equilibrates to the ambient Kele atmosphere before normal operation resumes. The original calibration is completely restored when the K-O2 Series Oxygen Monitor Manual status LED returns to steady GREEN.