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O

1/27/2021 

Kele, Inc. • 3300 Brother Blvd. • Memphis, TN  38133

 

S

ENSOR 

M

ODULE 

R

EPLACEMENT

When the sensor module is expired, the 
produce a steady 4 mA to indicate the sensor is not operational
replaced before the K-O2 will again operate normally.

Calibrated sensor modules are available from Kele.

 

Calibrated Oxygen
KMOD-O2 

 

6.1  F

IELD 

R

EPLACEMENT OF 

Sensor modules can be replaced when they reach the end 
service life.  To replace a sensor module
calibrated one, follow the steps below:

1.

 

Open the controller’s front cover

2.

 

Unplug the controllers power connector (refer to 

3.

 

Unplug the sensor module by pulling the sensor module 
firmly away from the main board 

4.

 

Plug the new sensor module into the vacant 
location, then press the module firmly until the 
standoff (shown in Figure 10) 
left side of the module board 

5.

 

Plug in the controllers power connector.

6.

 

Observe that the front cover indicator is no longer flashing 
red, and then close the controlle

 

 

OS-2 Oxygen Sensor 

Kele, Inc. • 3300 Brother Blvd. • Memphis, TN  38133 

 

 

EPLACEMENT

 

, the front cover LED will blink RED slowly and the module’s analog 

to indicate the sensor is not operational.    When this occurs, the sensor module must be 

O2 will again operate normally. 

Calibrated sensor modules are available from Kele. 

Oxygen Sensor 

Cal Kit 

UCK-3 kit

 

EPLACEMENT OF 

S

ENSOR 

M

ODULES

 

when they reach the end of their 

.  To replace a sensor module with a new factory-

, follow the steps below: 

front cover. 

Unplug the controllers power connector (refer to Figure 6). 
Unplug the sensor module by pulling the sensor module 

from the main board (Figure 10). 

ug the new sensor module into the vacant ‘Sensor 1’ 

ess the module firmly until the nylon 

 has ‘snapped’ the bottom-

board  

Plug in the controllers power connector. 

indicator is no longer flashing 

red, and then close the controller’s enclosure. 

Figure 10: Sensor Module Replacement

 

Page 10 of 14 

he module’s analog output will 

When this occurs, the sensor module must be 

 

: Sensor Module Replacement 

Summary of Contents for K-02

Page 1: ...Kele Inc 3300 Brother Blvd Memphis TN 38133 Revision 1 29 2021 Oxygen Ventilation and Alarm Controller User s Manual ...

Page 2: ...l Description 5 4 1 Special Modes 5 4 2 Warning Ventilation and Alarm Conditions 6 4 3 Setting Ventilation and Alarm Thresholds 6 4 4 Concentration Reporting 7 5 Sensor Calibration 7 5 1 Calibration Gases 7 5 2 Zero Calibration Procedure 8 5 3 Span Calibration Procedure 9 6 Sensor Module Replacement 10 6 1 Field Replacement of Sensor Modules 10 7 Warranty 11 7 1 Duration 11 7 2 Limited warranty an...

Page 3: ...wer Voltage 14 30 VAC RMS or DC Isolated power supply separate transformer not required Power Consumption 5W Control Relays 2 Separate SPDT line voltage capable relays for warning ventilation and alarm outputs 10 Amps max at 120 277 VAC RMS or 30 VDC Concentration Reporting Output Isolated powered 4 20 mA current loop output 4 mA output 0 concentration 20 mA 25 Maximum loop resistance 510Ω Termina...

Page 4: ...lectronics are attached to the front cover There are trade conduit knock on all sides for electrical connections In potentially damp locations the knock out on the bottom of the case should be used to minimize the possibility of water entry DO NOT USE THE VENT HOLES FOR WIRE ENTRY This unit is designed to mount to a rigid vibration free surface near the middle of the area to monitored about 5 feet...

Page 5: ...lvd Memphis TN 38133 NSTALLATION The controller is not equipped with a power switch it is operational whenever sufficient power is applied to the All electrical connections to the controller are made through screw terminals that can be unplugged er s enclosure contains conduit knockouts on all sides for flexibility during Figure 2 for details and dimensions of the enclosures ONNECTIONS The sensor ...

Page 6: ...r to the controller OS 2 Oxygen Sensor Kele Inc 3300 Brother Blvd Memphis TN 38133 Figure 6 Location of Power Terminal s for relay connection are provided in ventilation and Alarm relay Determine if the device being attached to the relay output should be wired in NO or NC configuration Unplug the relay output screw terminal voltage for the device being attached to the controller s relay output to ...

Page 7: ...normal operation ESCRIPTION is a ventilation and alarm controller that senses the oxygen concentration in the ambient space around it contact closure that can be used to operate ventilation fans when oxygen concentration approaches unsafe levels a second set of alarm contacts is operated to trigger an alarm a calibrated module that can be replaced with minimal effort when it reaches while leaving ...

Page 8: ...Setting Table 6 Concentration Settings Analog Output Relays Actuated Comment 20 mA Depends on concentration During normal operation 20 mA NONE During start up interval or any time during calibration 20 mA Depends on concentration Sensor nearing the end of service life Relays and analog output function normally 4 mA Warning Ventila tion After calibration of expired Sensor is no longer operational E...

Page 9: ...s from the sensor are reported by the controller The output connector location is shown in Figure 3 Output scaling is as shown in ALIBRATION calibration at the specified calibration interval listed in is maintained over its life Calibration is a the sensor module with oxygen free or and then a specific concentration or span gas Two calibration are provided on the main board as shown in During gas ...

Page 10: ...e calibration gas has been removed the calibration has been applied and the unit is in standby for two minutes while the sensor re equilibrates to the ambient atmosphere before normal operation resumes The calibration is complete when the status LED returns to steady GREEN OR 3B If NOT successful blinking RED The most likely cause of zero calibration sampling failure is insufficient gas flow or le...

Page 11: ...when the status LED returns to steady GREEN OR 3B If NOT successful blinking RED The most likely causes of span gas sampling failure are Insufficient gas flow or leaks around the calibration adapter not completely immersing the sensor in the calibration gas Verify that calibration gas cylinder has not run out and the calibration adapter is properly positioned The oxygen concentration in the calibr...

Page 12: ... indicator is no longer flashing red and then close the controlle OS 2 Oxygen Sensor Kele Inc 3300 Brother Blvd Memphis TN 38133 EPLACEMENT the front cover LED will blink RED slowly and the module s analog to indicate the sensor is not operational When this occurs the sensor module must be O2 will again operate normally Calibrated sensor modules are available from Kele Oxygen Sensor Cal Kit UCK 3 ...

Page 13: ...mpatible with those Products Unless KELE agrees otherwise to obtain service under this warranty Buyer must pack any nonconforming Product carefully and ship it postpaid or freight prepaid to Kele Inc at 3300 Brother Blvd Memphis TN 38133 before the expiration of the warranty period Buyer must include a brief description of the nonconformity Any actions for breach of this warranty must be brought w...

Page 14: ...failures If a failure is detected the front cover status LED will blink slowly RED the warning relay will be activated and the concentration reporting analog output will stay at 4 mA until the sensor is replaced 8 2 LIFE SAFETY This unit is not designed certified sold or authorized for use in applications where the failure of this device could be reasonably expected to result in personal injury or...

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