AIR SYSTEMS CO2-91IS Manuale utente

C US



INTRINSICALLY SAFE, CLASS I

DIVISION I, GROUPS C AND D

1072398

OPERATING INSTRUCTIONS AND REPLACEMENT PARTS

Models: CO2-91IS and CO2-91ISLA

AIR SYSTEMS INTERNATIONAL, INC.

829 Juniper Crescent, Chesapeake, Va, 23320

Telephone (757) 424-3967

Toll Free 1-800-866-8100

Fax No. (757) 424-5348

www.airsystems.com.

e-mail: [email protected]

This manual must be read carefully and followed by all persons who have or will have the responsibility

for using or servicing this equipment. This equipment will perform as designed only if used according

to the instructions. Otherwise it could fail to perform as designed, causing personal injury or death.

WARNING

Air Systems’ manufactured equipment is warranted to the original user against defects in workmanship or materials under

normal use for one year from the date of purchase. Any part which is determined by Air Systems to be defective in mate-

rial or workmanship will be, as the exclusive remedy, repaired or replaced at Air Systems’ option. This warranty does not

apply to electrical systems or electronic components. Electrical parts are warranted, to the original user, for 90 days from

the date of sale. During the warranty period, electrical components will be repaired or replaced at Air Systems’ option.

NO OTHER WARRANTY, EXPRESSED OR IMPLIED, AS TO DESCRIPTION, QUALITY, MERCHANTABILITY, FIT-

NESS FOR A PARTICULAR PURPOSE, OR ANY OTHER MATTER IS GIVEN BY AIR SYSTEMS IN CONNECTION

HEREWITH. UNDER NO CIRCUMSTANCES SHALL THE SELLER BE LIABLE FOR LOSS OF PROFITS, ANY OTHER

DIRECT OR INDIRECT COSTS, EXPENSES, LOSSES, OR DAMAGES ARISING OUT OF DEFECTS IN, OR FAILURE

OF THE PRODUCT OR ANY PART THEREOF.

The purchaser shall be solely responsible for compliance with all applicable Federal, State and Local OSHA and/or MSHA

requirements. Although Air Systems International believes that its products, if operated and maintained as shipped from

the factory and in accordance with our “operations manual”, conform to OSHA and/or MSHA requirements, there are no

implied or expressed warranties of such compliance extending beyond the limited warranty described herein. Product

designs and speciﬁ cations are subject to change without notice. Rev. 2, 12/98

Air leaks are not covered under warranty except when they result from a defective system component, i.e. an on/off valve

or regulator or upon initial delivery due to poor workmanship. Air leaks due to poor delivery or damage will be covered un-

der delivery claims. Minor air leaks are part of routine service and maintenance and are the responsibility of the customer

just as are ﬁ lters and oil changes.

Warranty

SYSTEM MAINTENANCE

Filter Housing/Bowls: Periodic cleaning of the polycarbonate bowls may become necessary. Remove the auto drains and

clean the bowls with a mild soapy solution. The auto drains may also be cleaned with a mild soapy solution at this time.

Dry and reinstall into the ﬁ lter housing.

Filter Change: The ﬁ ltration system consists of ﬁ lter change indicators which will gradually change from green to orange

when ﬁ lter life is spent.

Note: Air must be ﬂ owing through the ﬁ lters before the ﬁ lter change indicators will function. With system pressurized, close

inlet ond outlet ball valves. Release the ﬁ lter trio pressure by pressing the manual drain assembly to the side. Remove the

bowl assemblies by releasing the lock ring.

Calibration: Monitor calibration should be done monthly or whenever the reading may be questionable. A calibration date

sticker should be afﬁ xed for future reference. To obtain an accurate calibration, we recommend the use of Air Systems’

calibration kits.

Part Number:

BBK-10 Canadian calibration kit for CO monitor; 10ppm CO, zero air, regulator and case - 17 liter size.

BBK-20 Calibration kit for CO monitor; 20ppm CO, zero air, regulator and case - 17 liter size.

BBK-20103 Calibration kit for CO monitor; 20ppm CO, zero air, regulator and case - 103 liter size.

BBG-O2 Oxygen sensor test gas, 20.9% oxygen - 17 liter size.

DECAL085CD Calibration decal, sold in sheet of 14.

To assure sensor accuracy, calibration of monitor is required. If you cannot obtain an accurate calibration, sensor replace-

ment may be necessary. Consult Repair Service Department before ordering.

Part Number:

CO-91NS Replacement CO sensor

CO2-O2 Replacement O2 sensor

CAUTION: Always depressurize the system before performing service.

The monitor will analyze the air sample and display the oxygen % and CO concentration in parts per million (ppm). The

system’s green “NORMAL” operation light will illuminate and the red “HIGH CO” light will ﬂ icker approximately every sec-

ond when the CO level is below 10ppm (5ppm Canadian) and the oxygen level is above 19.5%. If the CO concentration

level exceeds the alarm set point, the green “NORMAL” light will turn off, the red “HIGH CO” light will illuminate, and the

audible alarm will sound. Once the CO concentration levels drop below the alarm set point, all alarm indicators will deac-

tivate and the unit will return to “NORMAL” operation. If oxygen levels drop below 19.5%, the green “NORMAL” light will

turn off, the red “LOW O2” light will illuminate, and the audible alarm will sound. Once the oxygen levels exceed 19.5%, all

alarm indicators will deactivate and the unit will return to “NORMAL” operation.

Carbon Monoxide/Oxygen Monitor System Components

Carbon Monoxide/Oxygen Monitor Specications

Maintenance Items

Size 2.75”H X 9.8”L X 5.1”W

Weight 3.2 lBS. (1.45kg.)

Case Extruded Aluminum

Anodized Black

Voltage

9 VDC

(9 Volt Batteries Only -

Intrinsically Safe)

Shielding Internal RFI/EMI ﬁ lters

Operating

Temperature

4° to 113° Fahrenheit

(-15.5° to 45° Celcius)

Humidity

Range 10% to 90% relative humidity

Flow

Requirement 50 - 100 cc/min

Display 3 digit LCD - CO concentration

3 digit LCD - O2 percentage

Test Circuit Manually activated

Sensor Type Sealed electrochemical sensors for

Carbon Monoxide and Oxygen

Accuracy +/-1% full scale

Response 90% in 10-15 seconds

Detectable

Range

0-200 ppm CO

15-23% O2

Calibration Manual CO zero and span adjustments

Manual O2 adjustment

Alarm Setting 10 ppm CO (5 ppm - Canadian)

19.5% O2

Warning

Signals

Normal Operation - Green Light

High CO - Red Light

High CO/Low O2 - Audible Alarm

Low O2 - Red Light

Low Battery - Amber Light

Warranty 2 years from original date of purchase for

monitor and CO sensor, 1 year on O2 sensor

NOTE: Model CO2-91IS has the indicator lights and audible alarm mounted on bottom of housing and Model CO2-91ISLA

has the indicator lights mounted on top of housing with the audible alarm being mounted on the left endplate.

Carbon Monoxide/Oxygen Monitor System Components

ITEM # DESCRIPTION PART #

1 LCD Display MONC703

2Span Poten ometer MONC702A

3Alarm Set Point Poten ometer MONC702A

4Zero Poten ometer MONC702

5 Air Sample Inlet Socket MONC001

6 Air Sample Plug MONC002

7 Air Exhaust Port MONC003

8On/Oﬀ /Test Switch MONC007

9 CO2-91IS/CO2-91ISLA Faceplate Assembly CO2-91EXFP

10 Faceplate/Endplate Screw MONC023

11 Main Circuit Board Assembly CO2-91IPCB

12 Power Supply Board CO2-91EXPS

13 Ba ery Box Connector (Soldered To PCB) MONC516

14 PPM/Serial No. S cker MONC031

15 Ba ery Box MONC006

16 9 Volt Ba ery ELB9V

17 Calibra on Tool MONC028

18 End Plate CO-91BEP

19 Audible Alarm (CO2-91ISLA) ELLS004IS

20 Aluminum Housing MONC021A

21 Led Socket MONC009LA

22 Yellow LED MONC008NS

23 LED Socket And Yellow LED CO-91LED

24 Red LED (CO2-91ISLA) MONC035NS

25 Green LED (CO2-91ISLA) MONC036NS

26 Oxygen % Decal DECAL051

27 CO Sensor Connector (Soldered To PCB) MONC509

28 O2 Sensor Connector (Soldered To PCB) MONC511

29 LED Connector (Soldered To PCB) MONC511

30 CO Sensor CO-91NS

31 CO Sensor Holder MONC810

32 CO Sensor Electrical Leads CO-91SL

33 90° Hose Barb MONC811

34 O2 Sensor CO2-O2

35 O2 Sensor Holder MOCAPREM

36 O2 Sensor Electrical Leads CO2-91SL

37 Audible Alarm (CO2-91IS) ELLS008

38 Lamp Socket (CO2-91IS) ELDS004

39 Clear Lens (CO2-91IS) ELDS013

40 Red LED (CO2-91IS) MONC004

41 Green LED (CO2-91IS) MONC005

Carbon Monoxide/Oxygen Monitor System Components

SENSOR REPLACEMENT

Replacement CO sensors are shipped with a metal clip installed between the electrodes. Do not remove the clip until the

sensor is to be installed in the monitor. O2 sensors do not require a clip installed between the electrodes.

STEP 1)

Disconnect all external connec-

tions and remove CO/O2 monitor

from the unit.

STEP 2)

Remove the four screws from the mon-

itor’s left endplate.

STEP 3)

Remove endplate to gain access to the

sensor cups.

STEP 4)

Remove sensor from sensor cup and remove leads. Take the new

sensor and remove the metal clip (CO sensor only). Reattach leads

to the proper colored terminals on the new sensor. Install new sensor

into sensor cup. O2 sensor connections are as follows: grey lead -

positive, white lead - negative.

STEP 5)

Reassemble monitor and reinstall in unit.

Connect all cables and air sample hose. Al-

low monitor to stabilize 30 minutes to 1 hour

and recalibrate.

UNUSED

CONTROL

(BLACK)

SENSING

(RED)

REFERENCE

(BLUE)

CO SENSOR

O2 SENSOR

CO SENSOR

Sensor Replacement

CALIBRATION PROCEDURE

Do not use inert gases to zero the monitor. This will cause premature failure of the sensor.

CO/O2 Monitor Zero Adjustment

To zero the monitor, follow the steps below. Zero calibration gas should be used to properly “zero” the monitor

and assure that a valid calibration is achieved. If zero adjustment cannot be made as indicated, sensor replacement may

be necessary. After each monitor adjustment outlined in the steps, allow time for the changes to stabilize.

STEP 1)

Place the “ON/OFF/TEST” switch in the “ON” position.

STEP 8)

Allow digital readout to stabilize approximately 15-30

seconds.

STEP 10)

Turn the regulator off and disconnect the regulatorfrom

the zero gas cylinder.

STEP 2)

Allow 30 seconds for the readout to stabilize. The green

indicator will illuminate.

STEP 3)

Hold the “ON/OFF/TEST” switch in the “TEST” position.

The following will occur:

Audible alarm will sound

“LOW O2” and “NORMAL” indicators blink

together and alternate with the “HIGH CO”

indicator.

Amber “LOW BATTERY” indicator on monitor

will illuminate.

This test ensures the circuitry is operable and continuity

to the sensor is proper. Release the switch.

STEP 4)

Remove the air sample inlet tube.

STEP 5)

Install regulator on the zero air cylinder reference gas.

STEP 7)

Attach the clear tubing with the male plug to the air sam-

ple inlet on the monitor.

STEP 6)

Turn the knob on the regulator counterclockwise to allow

the ﬂ ow of gas thru the hose. Verify ﬂ ow of gas thru the

hose via touch or sound.

STEP 9)

Adjust the “zero” adjustment screw (clockwise to increase

or counterclockwise to decrease) until a reading of “00” is

obtained.

Calibration Procedure

CALIBRATION PROCEDURE

CO/O2 Monitor Span Adjustment

Use only 10-20ppm CO gas for calibration. Using a higher concentration may decrease accuracy at lower scale

readings. Note: 10ppm gas must be used to satisfy Canadian calibration requirements.

STEP 1)

Install regulator on the CO calibration gas cylinder.

STEP 3)

Connect the plug to the air sample inlet on the monitor.

STEP 2)

Turn the knob on the regulator counterclockwise to allow

the ﬂ ow of gas thru the hose. Verify ﬂ ow of gas thru the

hose via touch or sound.

STEP 4)

Allow digital readout to stabilize 15-30 seconds.

STEP 5)

Adjust the “span” adjustment screw (clockwise to in-

crease or counterclockwise to decrease) until the digital

readout reads the same as the concentration (ppm) as

printed on the calibration gas cylinder.

STEP 6)

Turn the regulator off and repeat the “zero” adjustment

procedure. The digital readout should return to a “00”

reading.

The monitor is now calibrated and should be recalibrat-

ed monthly or if accuracy is questionable. Check local

requirements and recalibrate as required.

O2 Sensor Adjustment

STEP 7)

Make sure the monitor is not located in an oxygen deﬁ -

cient atmosphere during testing. Using Air System’s P/N

BBG-O2, 20.9% oxygen test gas, repeat steps 1-4. Turn

the “O2 ADJ.” screw until a reading of 20.9% is achieved.

To test the low O2 alarms, turn “O2 ADJ.” screw until dis-

play reads approximately 19.5%. When ﬁ nished testing

alarms reset to 20.9%.

Note: Normal ambient oxygen level is 20.9%

Calibration Procedure

Notes:

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