Bacharach N2O Portable Monitor Instruction

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Page 1

Patent 6,590,690

N2O Portable Monitor

Portable Area Gas Monitor (PAGM) with Infrared Sensor for N2O Gas

Instruction 3015-4787

Operation & Maintenance

Rev. 8 – February 2013

Product Leadership • Training • Service • Reliability

Page 2

WARRANTY

Bacharach, Inc. warrants to Buyer that at the time of delivery this Product will be free from defects in material and manufacture and will conform substantially to Bacharach Inc.'s applicable specifications. Bacharach's liability and Buyer's remedy under this warranty are limited to the repair or replacement, at Bacharach's option, of this Product or parts thereof returned to Seller at the factory of manufacture and shown to Bacharach Inc.'s reasonable satisfaction to have been defective; provided that written notice of the defect shall have been given by Buyer to Bacharach Inc. within two (2) years after the date of delivery of this Product by Bacharach, Inc.

Bacharach, Inc. warrants to Buyer that it will convey good title to this Product. Bacharach's liability and Buyer's remedy under this warranty of title are li mited to the r emoval of any title defects or, at the election of Bacharach, to the replacement of this Product or parts thereof that are defective in title.

The warranty set for th in par a gr a ph 1 does not apply to parts the Operating Instructions designate as having a limited shelflife or as being expended in normal use (e.g., filters).

THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU OF (I) ANY AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE: AND (II) ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACT OR T ORT, WHETHER OR NOT ARISING FROM BACHARACH'S NEGLIGENCE, ACTUAL OR IMPLIED. The remedies of the Buyer shall be limited to those provided herein to the exclusion of any and all other remedies including, without limitation incidental or consequential damages. No agreement varying o r extending the foregoing warr a nties, remedies or this limitation will be binding upon Bacharach, Inc. unless in writing, signed by a duly authorized office r of Bachara ch.

www.mybacharach.com

Product improvements and enhancements are continuous; therefore the specifications and information contained in this document may change without notice.

Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

No part of this document may be photocopied, reproduced, or translated to another language without the pr ior written consent of Bacharach, Inc.

and logos referenced herein belong to their respective owners.

is a registered trademark of Bacharach, Inc. All other trademarks, trade names, service marks

ii Instruction 3015-4787

Page 3

N2O Portable Monitor Table of Contents

Table of Contents

1 INTRODUCTION ....................................................................................................................................... 1

1.1 How to Use This Manual ................................................................................................................. 1

1.2 Warning Statements ........................................................................................................................ 1

1.3 Caution Statements ......................................................................................................................... 1

1.4 Hazard Symbols on Monitor ............................................................................................................ 1

1.5 Safety Precautions ........................................................................................................................... 1

1.5.1 Hazardous Area Warning ................................................................................................. 1

1.5.2 Combustible/Flammable Gas Warning ............................................................................ 2

1.5.3 Explosive Atmosphere ....................................................................................................... 2

1.5.4 Misuse and Modifications to Monitor ............................................................................... 2

1.5.5 Altitude Limit .................................................................................................................... 2

1.5.6 Cleaning ............................................................................................................................. 2

1.6 Unpacking and Initial Checks ......................................................................................................... 2

1.7 Shipping Precaution ......................................................................................................................... 3

1.8 Features and Capabilities................................................................................................................ 3

1.9 Functional Overview ........................................................................................................................ 3

2 SPECIFICATIONS ..................................................................................................................................... 4

3 OPERATION .............................................................................................................................................. 5

3.1 Front Panel Display and Controls .................................................................................................. 5

3.2 Connecting Gas-Sample & Exhaust Lines ..................................................................................... 5

3.2.1 Overview ............................................................................................................................ 5

3.2.2 Connecting the Gas-Sample Line ..................................................................................... 5

3.2.3 Connecting the Exhaust Line (optional) .......................................................................... 6

3.3 Gas Detector Operation ................................................................................................................... 6

3.4 Time Weighted Average (TWA) Operation ..................................................................................... 8

3.4.1 Overview ............................................................................................................................ 8

3.4.2 Starting a New or Continuing TWA/twa.......................................................................... 8

3.5 Peak Reading Operation .................................................................................................................. 9

3.6 Leak Detector Operation ................................................................................................................. 9

3.7 Standby Mode ................................................................................................................................... 9

3.8 Battery – Charging and Using ...................................................................................................... 10

3.8.1 Charging the Battery ...................................................................................................... 10

3.8.2 Using the Battery ............................................................................................................ 10

3.9 Display Screens .............................................................................................................................. 10

3.9.1 Initial Power ON .............................................................................................................. 10

3.9.2 Filling the Purge-Air Bag ................................................................................................ 10

3.9.3 Data Display Screen ........................................................................................................ 10

3.9.4 Function Screens ............................................................................................................. 11

3.10 Working with System Faults ......................................................................................................... 14

3.10.1 Functional Overview ....................................................................................................... 14

3.10.2 Clearing / Silencing a Fault Alarm ................................................................................ 14

3.10.3 Viewing the Faults Log ................................................................................................... 14

3.10.4 Fault Codes ...................................................................................................................... 15

3.11 Working with the Gas Alarm ........................................................................................................ 16

3.11.1 Gas-Alarm Light .............................................................................................................. 16

3.11.2 Silencing a Gas Alarm ..................................................................................................... 16

3.12 Clearing the PPM & Faults Data .................................................................................................. 16

3.13 Working with the DIAG Function ................................................................................................. 16

3.13.1 Overview .......................................................................................................................... 16

3.13.2 Keypad Functions ............................................................................................................ 16

3.13.3 First Diagnostic Screen ................................................................................................... 17

3.13.4 Second Diagnostic Screen ............................................................................................... 17

3.14 Working with the P-CHK Function .............................................................................................. 18

3.14.1 Overview .......................................................................................................................... 18

Instruction 3015-4787 iii

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Table of Contents N2O Portable Monitor

3.14.2 Keypad Functions............................................................................................................ 18

3.14.3 Screen Display ................................................................................................................. 18

3.15 Print/Plot Logged Gas Levels ........................................................................................................ 19

3.16 Downloading Stored Data to a Personal Computer ..................................................................... 20

3.17 Importing Saved Data Into a Spreadsheet ................................................................................... 21

4 MAINTENANCE ...................................................................................................................................... 22

4.1 Disassembly.................................................................................................................................... 22

4.2 Internal Particulate / Hydrophobic Filter Replacement ............................................................. 23

5 PARTS AND SERVICE ........................................................................................................................... 24

5.1 Replacement Parts & Optional Items ........................................................................................... 24

Replacement Parts...................................................................................................................... 24

Item Description ......................................................................................................................... 24

Part Number ............................................................................................................................... 24

Item Description ......................................................................................................................... 24

Part Number ............................................................................................................................... 24

5.2 Service Centers .............................................................................................................................. 25

6 DECLARATION OF CONFORMITY ....................................................................................................... 26

iv Instruction 3015-4787

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N2O Portable Monitor Introduction

1 Introduction

1.1 How to Use This Manual

This manual provides important information on how to operate and service Bacharach’s Nitrous Oxide

O) Portable Monitor.

To assure operator safety and the proper use of the monitor, please read, understand, and follow the contents of this manual.

If you have a working knowledge of gas monitors, you will find this manual useful as a reference tool. If you are new to the use of gas monitors, you can educate yourself about the principles of gas detection and the proper operation of this device by reading this manual thoroughly.

1.2 Warning Statements

The use of the word WARNING in this manual denotes a potential hazard associated with the use of this equipment. It calls attention to a procedure, practice, or condition, or the like, which if not correctly performed or adhered to, could result in personal injury or death.

1.3 Caution Statements

The use of the word CAUTION in this manual denotes a potential hazard associated with the use of this equipment. It calls attention to a procedure, practice, condition, or the like, which if not correctly performed or adhered to, could result in damage to the equipment.

1.4 Hazard Symbols on Monitor

This symbol indicates the need to consult this operating instruction manual when opening the enclosure.

WARNING: A potential risk exists if the operating instructions are

not followed.

This symbol indicates the presence of electric shock hazards when the enclosure is opened.

WARNING: To avoid risk of injury from electric shock, do not open

the enclosure when power is applied.

1.5 Safety Precautions

1.5.1 Hazardous Area Warning

Hazardous Area Warning: This instrument has not been designed to be intrinsically safe for use in areas classified as hazardous locations. For your safety, DO NOT use it in hazardous (classified) locations.

Instruction 3015-4787 1

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Introduction N2O Portable Monitor

Item

Qty.

Part Number

N2O Portable Monitor

3015-4790

External Filter Assembly

3015-5324

Soft Carrying Case with Shoulder Strap

Battery Pack & Charger

3015-5739

Stainless Steel Probe

3015-5326

Instruction Manual

3015-4787

Elbow

3015-3234

Tubing (3 ft)

0003-6182

1.5.2 Combustible/Flammable Gas Warning

Combustible/Flammable Gas Warning: This is NOT a safety device. Some gases which this instrument can detect may be combustible/ flammable. When properly configured, this instrument is designed to alarm at concentrations that are lower than the explosive limit of the gas. As such, it is the buyer’s responsibility to initiate an immediate planned response to any gas leaks as soon as they are detected. This equipment should NEVER be used to measure or sample gases at or above their respective lower explosive limits.

1.5.3 Explosive Atmosphere

Explosive Atmosphere: Do not operate this equipment in the presence of flammable liquids, vapors or aerosols. Operation of any electrical equipment in such an environment constitutes a safety hazard.

1.5.4 Misuse and Modifications t o Monitor

The protection provided by the monitor may be impaired if the monitor is used in a manner not specified by these instructions. Changes or modifications to this monitor will void the warranty.

1.5.5 Altitude Limit

6,562 ft (2,000 m)

1.5.6 Cleaning

Clean the outside of the monitor’s case using a dry cloth — DO NOT use soap and water.

1.6 Unpacking and Initial Checks

Your N2O Portable Monitor was carefully inspected at the factory before shipment, and packed so as to be highly resistant to damage while in transport. When you receive the instrument, however, please unpack it promptly and make a visual inspection to make sure that no damage has occurred during shipment. Also check that all the following items have been received.

1 3015-5700

If damage was found, immediately file a claim with the carrier. If an item is missing, please contact Bacharach’s Service Department for assistance (refer to Section 5.2 Service Centers).

2 Instruction 3015-4787

Page 7

N2O Portable Monitor Introduction

1.7 Shipping Precaution

When shipping the instrument by air, deflate the purge-air bag to prevent it from bursting due to changes in air pressure. Deflate the bag by selecting the EMTYBAG function as described on page 11.

1.8 Features and Capabilities

• Detects, measures, and displays the level of N

• Measurement range of 0–1,000 ppm with a resolution of 1 ppm

• Self contained purge-air bag, allowing the monitor to be used in a contaminated atmosphere

• Automatically logs up to 200 gas readings that can be printed / plotted for analysis

• Eliminates false alarms with use of non-dispersive IR source and sample draw system

• Visual and audible gas alarm indictors that are turned ON when the detected gas level exceeds

a user defined trip-point

• Extensive self diagnostics, providing both visual and audible indications when a fault occurs

• Battery powered, providing 8–12 hours of operation

O gas in the area being monitored

1.9 Functional Overview

The Bacharach Nitrous Oxide (N2O) Portable Monitor is designed to detect, measure, and display the concentration of N self-zeros every 4 minutes using its internal supply of fresh air.

During normal operation the N detected on its front panel LCD. The monitor retains a log of previous readings that can be easily accessed at a later time for analysis.

Front panel indicators and an audible alarm are provided to signal gas alarm and instrument fault conditions. The audible alarm can temporarily be silenced by a push of a button, but will reactivate if the gas level is still above the alarm trip point after a user-defined time period has elapsed.

O gas in the area being monitored. To ensure accurate gas measurements, the monitor

O Monitor displays both the current gas level and the peak gas level

The N The monitor incorporates active diagnostics that continuously check the system for proper operation. A front panel indicator is provided to alert an operator of system malfunctions, and fault codes are generated that enable the operator to quickly identify the cause of the fault.

O Monitor requires only minor periodic maintenance such as the occasional replacement of filters.

Instruction 3015-4787 3

Page 8

Specifications N2O Portable Monitor

2 Specifications

Product Type ..................... Portable N2O Gas Monitor

Measuring Range ............. 0 to 1,000 ppm

Warm-Up Time ................. 15 minutes

Detector Type.................... Infrared, Non-Dispersive

Sensitivity ......................... 1 ppm

Accuracy ............................ ±1 ppm ±5% of reading from 0 to 100ppm

and ±10% of reading from 101 to 1000ppm.

Response Time .................. 90% of response within 3 seconds; 100% in 5 seconds

Temperature Drift ............ 1.5 ppm per °C between purge cycles

System Noise .................... Less than 40dB(A) at 10 ft (3 m)

Operating Temp................ 32 to 122°F (0 to 50°C)

Ambient Humidity ........... 5 to 90% RH (non-condensing)

Altitude Limit ................... 6,562 ft (2,000 m)

Power ................................. DC power pack, provides 8–12 hours of operation

Power Consumption ......... 15 Watts

Front Panel ....................... 3 Indicator lights:

ON – Green LED flashes during warm-up, and then glows steady during normal operation

FAULT – Yellow LED flashes when there is a system fault ALARM – Red LED flashes when the gas level is above its alarm setting

Audible Alarm .................. Internal audible alarm programmable for any of the following conditions:

OFF, FAULT/ALARM, ALARM

Dimensions ....................... 9D x 14.5L x 5W inches (229 x 368 x 127 mm)

Weight ............................... Less than 9 lbs (4 kg) including battery

Valid Calibration Period

to Specifications ................ 12 months

Warranty ........................... 2 Years from date of shipment

4 Instruction 3015-4787

Page 9

N2O Portable Monitor Operation

3 Operation

3.1 Front Panel Display and Controls

3.2 Connecting Ga s -Sample & Exhaust Lines

3.2.1 Overview

A single gas-sample line needs to be run from the N2O Monitor to the area to be monitored. If desired, an optional exhaust line can be installed to vent N

3.2.2 Connecting the Gas-Sampl e Line

To connect the gas-sample line to the monitor, simply push the tubing onto the elbow connector and attach the elbow onto the Gas Sample Port on the front of the monitor as shown in the illustration below.

The gas-sample line can be up to 50 ft (15.2 m) in length. All tubing bends should have a radius of no less than 5" to insure proper airflow. If kinks or obstructions occur in the line the monitor may not function properly.

The end of this line should be placed near the potential leak source and positioned to reduce the possibility of mists, aerosols, oil, water, dust, or other contaminates being drawn into the monitor.

An external filter (P/N 3015-5324) should be attached to the end of this line. See figure below.

Instruction 3015-4787 5

O gas away from the monitor.

Page 10

Operation N2O Portable Monitor

To connect the exhaust line to the exhaust

BACHARACH

PRESS ENTER FOR

3.2.3 Connecting the Exhaust Line (optional)

The optional exhaust line carries the exhausted gas sample away from the monitor.

The exhaust line can be up to 50 ft (15.2 m) in length. Ideally this line should terminate outdoors in a location that is not exposed to the elements.

Connect the exhaust line to the monitor by firmly pushing the tubing into the Exhaust Port’s push-toconnect (PTC) fitting. If the exhaust line terminates outside the building, position the tubing so that no water or moisture can enter the line. Note that this line does not require a termination filter.

port’s PTC fitting, firmly push the appropriate tubing into the hole in the center of the connector until it seats in the connector. Refer to the figures at the left.

To remove tubing from a PTC connector, push and hold the spring-l oad ed c ollar in war ds, then simultaneously withdraw the tubing. Refer to the figures at the right.

3.3 Gas Detector Operation

Turn ON the monitor as follows:

6 Instruction 3015-4787

CAUTION: Operate the monitor in its horizontal position (handle facing upwards).

Tilting the monitor to a vertical position while in operation may cause inaccurate measurements to occur.

1. Lift up the shield located in front of the handle

2. Press the red power ON/OFF toggle switch.

3. Observe monitor’s firmware version is briefly displayed.

VERSION x.xx

NEW TWA/twa

Page 11

N2O Portable Monitor Operation

MEASURE 2ndUNIT

PURGE 2ndUNIT

PURGE AIR EMPTY

WARM UP

4. Observe that the NEW TWA/twa screen may appear, depending on

the configuration of the monitor’s TWA/twa function (refer to Section 3.4 for detailed TWA operation).

5. Observe the monitor starts counting down its warm-up period of

900 seconds (15 minutes).

6. At the end of warm up, take the monitor to an area than contains

fresh air and press the ENTER button to fill the monitor’s internal purge-air bag with clean, fresh air that is of the same temperature and humidity as the area being monitored for gas. DO NOT fill the purge-air bag in an area that is contaminated with N

O gas.

After the purge-air bag is filled, observe the following as the monitor makes gas measurements in the area being sampled:

• MEASURE indicates when the monitor is actively measuring the

level of N

O gas at the sampling point. The screen to the right shows

that currently 100 ppm is being measured. The measurement cycle runs for 4 minutes.

A log of up to 200 previous measurements can be viewed using the PPM LOG function (page 12), or printed as described in 3.15.

The 2ndUNIT value (Blank, Peak PPM, Continuous TWA, or 8 Hr TWA) is user-selected (refer to 2ndUNIT function on page 13).

• PURGE indicates when the monitor is resetting its infrared detector

to a baseline of 0 ppm using the air contained in the monitor’s internal purge-air bag. The purge cycle runs for 10 seconds.

The monitor will operate for approximately 40 minutes before the purge-air bag needs refilled. When the message "PURGE AIR EMPTY" appears, take the monitor to a clean, fresh-air environment and press the ENTER button to refill the bag.

900

(ENTER) TO FILL

100ppm N2O

<ENTER> TO FILL

Work with gas alarms and system faults as follows:

ALARM (red) light turns ON if the detected gas level exceeds a programmed alarm point. An audible alarm also sounds if the AUDALRM function is activated (page 11) Pressing the front panel SILENCE button turns OFF the audible alarm, but the ALARM light will continue to flash for as long as the detected gas level is above the alarm point. The audible alarm will reactivate if the gasalarm condition is not cleared within the time period set by the SILENCE function (page 12).

FAULT (yellow) light turns ON if a fault occurs (see Fault Code list on page 15). An audible alarm also sounds if the AUDALRM function is activated (page 11). Pressing the front panel SILENCE button turns OFF the audible alarm, but the FAULT light continues to flash for as long as the fault is present. The audible alarm will reactivate if the fault condition is not cleared within the time period set by the SILENCE function (page 12). Both the FAULT light and audible alarm will automatically turn OFF after the cause of the fault has been eliminated. A log of the last 30 fault events can be viewed using the monitor’s FAULTS function (page 12).

Instruction 3015-4787 7

Page 12

Operation N2O Portable Monitor

PURGE 00TWA

PURGE 00twa

PRESS ENTER FOR

ELAPSED TWA TIME

3.4 Time Weighted Average (TWA) Operation

3.4.1 Overview

In addition to displaying the current N2O level, the monitor can also calculate and display a Time Weighted Average ppm value. This value is available in two formats (8 Hour or Continuous). This provides

users with the most appropriate data on their average ppm N

TWA operation is selected by using the 2ndUNIT function (page 13).

The two TWA formats are identified by the appearance of either “TWA” or ‘twa” in the upper-right corner of the Data Display screen.

• TWA (upper case letters) is calculated over an 8-hour period. This format is designed to show the

user’s average ppm N asterisk (*) will be displayed but the TWA will continue to be updated.

O exposure level during a typical work day. After 8 hours has expired, an

O exposure in the working environment.

100ppm N2O

• twa (lower case letters) is continuously calculated over the operating time of the monitor. This

mode is useful for monitoring an area for a few minutes or more and is the preferred mode of operation for checking operating room atmospheres.

100ppm N2O

3.4.2 Starting a New or Continuing TWA/twa

When the monitor is turned ON the following message appears if the monitor is set up to display TWA/twa.

Press either . . .

NEW TWA/twa

• ENTER to start a new TWA/twa

• ESC to continue with the current TWA/twa.

Tip: If NO button is pressed within 60 seconds the monitor automatically continues with the current TWA/twa.

Note: During the time the monitor is OFF, the gas measurement is assumed to be zero and will be factored into the TWA/twa calculation.

After selecting whether to start or continue a TWA/twa, the next screen shows the current elapsed TWA/twa time.

IS xx MINUTES

Where: xx is the accumulated time used by the monitor in calculating the TWA/twa.

8 Instruction 3015-4787

Page 13

N2O Portable Monitor Operation

PURGE 500pk

STAND BY

PURGE AIR EMPTY

RECHARGING PURGE

3.5 Peak Reading Operation

In addition to displaying the current N2O level, the monitor can also be set up to display its peak ppm measurement.

The peak reading display is selected by using the 2ndUNIT function (page 13).

100ppm N2O

The display above shows that currently the monitor is detecting 100 ppm N measurement of 500 ppm has occurred.

The peak reading is reset by pressing the ENTER button.

O and that a peak

3.6 Leak Detector Operation

The monitor can be configured to operate as a Leak Detector by setting the AUDALRM function (page 11) to LEAK DETECTOR.

When configured as a Leak Detector, the monitor will produce a leak detector type of audible feedback. At zero ppm there will be a tic every 2 seconds with the tic rate increasing up to 20 tics/second when the ppm level reaches the ALRMLVL (page 11) setting.

3.7 Standby Mode

After becoming operational, the monitor can be placed into a Standby Mode. When taken out of standby the monitor is ready for operation without waiting an additional 15 minutes to warm up. While in standby the monitor will stop taking gas samples and stops purging itself from the purge-air bag.

Place the monitor into its Standby Mode by pressing both the ENTER and ESC buttons at the same time.

Take the monitor out of standby by again pressing both the ENTER and ESC buttons.

When the monitor is taken out of standby the operator must refill the purge-air bag by pressing the ENTER button. Refilling the bag after coming out of standby re-establishes the monitor’s ambient pressure reading and ensures that the purge-air bag is filled at the start of taking gas measurements.

WARNING: Fill the purge-air bag in a clean, fresh-air environment that is at the

same temperature and humidity as the area being checked for gas. DO NOT fill the bag in an area that is contaminated with N

<ENTER> TO FILL

AIR...

O gas.

As soon as the purge-air bag has been refilled with fresh air, the Data Display screen appears and the monitor resumes normal operation.

Instruction 3015-4787 9

Page 14

Operation N2O Portable Monitor

BACHARACH

WARM UP

MEASURE 2ndUNIT

100ppm N2O

PURGE 2ndUNIT

100ppm N2O

PURGE AIR EMPTY

RECHARGING PURGE

3.8 Battery – Charging and Using

3.8.1 Charging the Battery

The monitor is powered b y a rechargeable batter y pack located in a pouch on the side of the m onitor’s soft carrying case. The battery pack can be recharged at any time, regardless of the battery’s current charge state.

The AC adapter provided acc epts voltage inputs of 100 to 240 VAC. Plu g the adapter into the wall, then into the battery. Discon nect the adapter when the batter y is fully charged. A fully charged battery pack will power the monitor for approximately 8-12 hours.

3.8.2 Using the Battery

The PAGM is designed for a 16VDC input. Following the instructions for the par ticular battery in use, set t he output voltage to 16V. Plug the batter y into the instru ment's battery input port and the instrum ent is re ady f or use.

3.9 Display Screen s

3.9.1 Initial Power ON

When the monitor is first powered ON, all front panel lights turn ON and a splash screen appears showing the monitor’s current firmware revision level. After a brief moment the Warm Up screen is displayed along with the front panel ON light (green) blinking.

The monitor requires 15 minutes to warm up from a cold start; after which, the ON light glows steady and the Data Display screen appears.

If the monitor is turned OFF and then turned back ON, the latter warm-up time may be less than 15 minutes depending on the temperature of the IR detector.

VERSION x.xx

3.9.2 Filling the Purge-Air Bag

CAUTION: Fill the purge-air bag in a clean, fresh-air environment that is at the

same temperature and humidity as the area being checked for gas. DO NOT fill the bag in an area that is contaminated with N

The following message is displayed and an audible alarm is sounded when the monitor’s purge-air bag is empty. This message appears immediately after warm-up, and approximately every 40 minutes during normal operation. Press the ENTER button to start the refill process.

<ENTER> TO FILL

After the air bag has been filled, the monitor starts or resumes normal operation by displaying the Data Display screen.

AIR...

O gas.

3.9.3 Data Display Screen

10 Instruction 3015-4787

Page 15

N2O Portable Monitor Operation

>FILLBAG EMTYBAG ALRMLVL AUDALRM

>PPM LOG LOG INT FAULTS DIAG

>SILENCE P-CHK

FILLING BAG...

DRAINING BAG...

AUDIBLE ALARM IS

EDIT ALARM LEVEL

>2ndUNIT PRINT PLOT PC-DUMP

During normal operation the Data Display screen shows when the monitor is performing the following two functions:

MEASURE indicates that the monitor is actively measuring gas. In the screen shown above the monitor is currently detecting 100 ppm of N 8 Hr TWA) is user-selected (refer to 2ndUNIT function on page 13). The measurement cycle runs for 4 minutes.

PURGE is displayed when the monitor is resetting its infrared detector to a baseline of 0 ppm using the fresh air in the monitor’s internal purge-air bag. The purge cycle runs for 10 seconds.

O gas. The 2ndUNIT value (Blank, Peak PPM, Continuous TWA, or

3.9.4 Function Screens

The Function screens are used to set up the monitor and display stored data.

From the Data Display screen, press both the Keypad Left and Right buttons at the same time to display the first Function Menu screen. Next, use the Keypad buttons to move the arrow (>) until it points to the desired function, and then press the ENTER button to select that function.

Once a function has been selected, use the Keypad to scroll through the displayed data or to change a parameter associated with that function. Press ENTER to save any newly entered parameters. Press the ESC button to return to the previous screen without saving.

Note that if no buttons are pressed within 90 seconds after selecting a function, the unit returns to the Data Display screen.

GAS CLOCK

FILLBAG – Press ENTER to manually fill the purge-air bag.

WARNING: Fill the purge-air bag in a clean, fresh-air environment

that is at the same temperature and humidity as the area being checked for gas. DO NOT fill the bag in an area that is contaminated with N

O gas.

EMTYBAG – Press ENTER to manually empty the purge-air bag. Use

this function to drain the bag if it becomes contaminated with gas.

ALRMLVL – Detected gas level that causes the front panel ALARM

(red) light to turn ON and the audible alarm to sound (if AUDALRM function is set to ALARM or ALARM/FAULT).

AUDALRM – The internal audible alarm is programmable to function as

follows:

• OFF – Audible alarm is disabled.

• ALARM – Alarm sounds when detected gas level exceeds the ALRMLVL level as evidenced by the front

panel ALARM (red) light turning ON.

Instruction 3015-4787 11

0300 ppm

ALARM

Page 16

Operation N2O Portable Monitor

#025 7PPM @

LOG INTERVAL IS

4.2159v <0000>

SILENCE TIMEOUT

#15 <1000> @

• ALARM/FAULT – Alarm sounds when either the detected gas level exceeds the ALRMLVL value, or if

a system fault occurs, as evidenced by the front panel ALARM (red) light or FAULT (yellow) light turning ON.

• LEAK DETECTOR – When selected, the monitor will produce a leak detector type of audible feedback.

At zero ppm there will be a tic every 2 seconds with the tic rate increasing up to 20 tics/second when the ppm level reaches the ALRMLVL setting.

• TWA ALARM – Audible alarm sounds when the TWA or twa, whichever is selected by the 2ndUNIT

Function, exceeds the ALARMLVL value.

The audible alarm can be temporarily silenced by pressing the SILENCE button (page 12).

PPM LOG – Contains records of the last 200 measurements. Each

record shows the measurement’s date, time, and ppm level. Measurements are logged at an interval determined by the LOG INT function. After all 200 locations are filled the newest entries overwrite the oldest entries.

Use the Keypad Up and Down buttons to change the record number by a factor of 1. Use the Right and Left buttons to change the record number by a factor of 10. Press ESC to return to the previous screen.

07/11/05 15:35

To the right, record #025 shows that a gas level of 7 ppm was measured on 07/11/05 at 15:35.

The PPM Log can be cleared per Section 3.11.

LOG INT – Sets the interval at which measurements are logged to

memory from 1 to 9999 minutes. Factory default is 1 minute. The logged measurements can be viewed using the PPM LOG function. Use the Keypad to enter the desired value, and then press ENTER to save that value and return to the previous screen.

FAULTS – Contains records of the last 30 fault events. The most recent

event is displayed when the Fault screen is first displayed. After 30 events have been recorded, the newest record overwrites the oldest. Each record lists an event’s numeric fault code (refer to Section 3.10) plus the date and time at which the event occurred. Use any of the Keypad buttons to scroll through the other fault events. Press ESC to return to the previous screen.

To the right, record #15 shows that a Purge Flow Fault (fault code <1000>) occurred on 07/11/05 at 12:37.

0001 min

07/11/07 12:37

DIAG – Enters the diagnostic function. Refer to Section 3.13.

SILENCE – Sets the length of time the internal audible alarm is turned

OFF when the front panel SILENCE button is pressed. The factory default is 30 seconds. If the cause of the gas-alarm has not been cleared at the end of this time period, the internal audible alarm will reactivate. Use the Keypad to enter the desired time period, and then press ENTER to save that value and return to the previous screen.

12 Instruction 3015-4787

29.05cD 14.58psi

0030 sec

Page 17

N2O Portable Monitor Operation

14.07 * AMB14.05

-0.02dif <1000>

SET DATE & TIME

SELECT GAS TYPE

MEASURE 00500pk

2ndUNIT >PRINT

2ndUNIT PRINT

P-CHK – The Pressure Check function displays the current manifold

pressure and the stored ambient pressure in psia, along with the difference between these two pressures and the current fault code. Refer to Section 3.14.

GAS – Displays Nitrous Oxide (N

gas types are available for selection.

O) as the gas being monitored. No other

CLOCK – Sets the monitor’s date and time. Use the Keypad to enter

the correct date and time, and then press ENTER to save those values and return to the previous screen. Note that time is displayed in a 24 hour format, while the date is displayed as mm/dd/yy.

2ndUNIT – One of following second measurements can be selected to

appear in the upper-right hand corner of the Data Display Screen:

• NONE – Blank

• Peak PPM – Peak gas reading

• Cont twa – Time Weighted Average calculated on a continuous basis

• 8hr TWA – Time Weighted Average calculated over an 8 hour period

PRINT – Refer to Section 3.15 Print/Plot Logged Gas Levels.

PLOT – Refer to Section 3.15 Print/Plot Logged Gas Levels.

PC-DUMP – A personal computer can be connected to the monitor’s DB9

RS-232 connector (refer to illustration in Section 3.15) for the purpose of downloading logged ppm measurements. These measurements can later be analyzed using any common spreadsheet program. Refer to Section 3.17 for detailed instructions on how to transfer stored data to a personal computer.

N2O

07/11/05 15:30

100ppm N2O

PLOT PC-DUMP

>PLOT PC-DUMP

PLOT >PC-DUMP

Instruction 3015-4787 13

Page 18

Operation N2O Portable Monitor

FAULT CODE <1800>

#03 <0800> @ 07/11/05 08:17

#04 <0000> @

3.10 Working with System Faults

3.10.1 Funct ional Overview

If a system malfunction occurs (see Fault Code list, page 15), the front panel FAULT light will flash and the audible alarm, if activated (refer to AUDALRM function page 11), will start beeping.

3.10.2 Cl e aring / Silencing a Fault Alarm

The FAULT light and audible alarm will automatically turn OFF after the cause of the fault has been eliminated.

Pressing the SILENCE button while a fault condition still exists causes the internal audible alarm to turn OFF for a period of time as set by the SILENCE function (page 12). The front panel FAULT light will continue to flash as a reminder that a fault condition still exists. At the end of the silence period if the cause of the fault has not been corrected the audible-alarm circuit will reactivate.

3.10.3 Viewing the Faults Log

From the Data Display screen, press any of the Keypad buttons to display the first Function Menu screen. Next, use the Keypad buttons to move the arrow (>) until it points to the FAULTS function, and then press the ENTER button to display the Faults Log screen.

The Faults Log screen shows the monitor’s current fault status. If the fault is still present when the FAULTS function is selected, then the current cause of the fault is displayed along with the date and time it occurred. If the cause of the fault has been cleared, then the Faults Log screen will show <0000> along with the date and time the fault was

07/11/05 09:00

12 SAMPLE FLOW

13 PURGE FLOW

The Fault Log can be cleared as described in the “Working with the Gas Alarm" section.

Gas-Alarm Light

If the detected gas level reaches the gas-alarm level as set by the ALRMLVL function, the front panel ALARM (red) light will flash and the audible alarm, if activated (refer to AUDALRM function on page

11), will start beeping. The ALARM light and audible alarm will automatically turn OFF once the detected gas level drops below the gas-alarm level.

cleared. Use the Keypad buttons to scroll through the fault log. In the screens shown to the left, record #03 shows that a Sample Flow Fault (fault code <0800>) occurred on 07/11/05 at 08:17, while record #04 shows that the fault was cleared on 07/11/05 at 9:00.

The cause of the fault is identified by a numeric fault code. To convert the fault code into a text description of the fault, first press the ENTER button and then use the Keypad buttons to scroll through the display until the text description of the fault appears. If the fault code is a combination of two or more faults, then continue to use the Keypad buttons until all fault text descriptions have been displayed. For example, the fault code <1800> represents the combination of both a Sample Flow <0800> and a Purge Flow <1000> fault as shown to the left.

Silencing a Gas Alarm

Pressing the SILENCE button while the alarm circuit is activated causes the audible alarm to turn OFF for a period of time as set by the SILENCE function (page 12). The front panel ALARM light will continue to flash as an indication that an alarm condition still exists. At the end of the silence period if the detected gas level is still above the gas-alarm level the audible alarm will reactivate.

14 Instruction 3015-4787

Page 19

N2O Portable Monitor Operation

FAULT CODES ARE ADDITIVE. For example:

<0200> Gain Set Fault: The digipot autotune

3.10.4 Fault Codes

A fault code of <0003> indicates that both a Box Temperature Fault <0001> and a Bench Temperature Fault <0002> have occurred.

<0001> Box Temperature Fault: Enclosure temperature is outside normal range (or IR detector has failed). Check that the monitor is not being subjected to extreme temperatures. Use the function to check the Box Temperature.

<0002> Bench Temperature Fault: Optical bench is outside normal operating range (or IR detector has failed). Check that the monitor is not being subjected to extreme temperatures.

<0004> Manifold Pressure Fault: The manifold pressure is outside its normal operating range (or IR detector has failed). Enter the

DIAG function and

record ALL data. Call the factory with this information for further instructions.

<0040> Fill Flow: The purge-air bag’s pressure drop is outside expected limits. Use the

FILLBAG functions to refill the purge-air bag. If

and the fault still occurs, check for a punctured bag or disconnected tubing.

<0080> Over Range Fault: Monitor exposed to a gas level that exceeded 65,000 ppm.

<0100> Zero Filter Fault: The air-purge bag is contaminated with gas. Take monitor to a clean-air area and use the

EMTYBAG and FILLBAG functions

several times to decontaminate the purge-air bag.

DIAG

EMTYBAG

sequence has failed. This fault will only occur on first boot up or after a firmware upgrade. Call the factory for further instructions.

<0400> A/D Fault: A fault has occurred in the analog-to-digital circuitry. Contact the factory with this information for further instructions.

<0800> Sample Flow Fault: Check for: A restriction in the gas-sample inlet or exhaust; a blocked internal filter; or a failed pump.

<1000> Purge Flow Fault: Check for: A restriction in the gas-sample exhaust; a blocked internal filter; or a failed pump. Once the purge air stream has been restored, the monitor will return to normal operation after it completes a purge cycle.

<2000> Bag Fill Time: The purge-air bag did not fill within the expected time allotment, or too many purge cycles occurred indicating a leak in the purgeair system. Check for a punctured bag or disconnected tubing.

<4000> Zero Range Fault: The IR detector’s output voltage is out of tolerance. Enter the

DIAG

function and record all data. Call the factory with this information for further instructions.

<8000> Clipping Fault: The detector voltage may be out of tolerance. Use the

DIAG function to check

the IR detector voltage. Call the factory with this information for further instructions.

Instruction 3015-4787 15

Page 20

Operation N2O Portable Monitor

3.11 Working with the Gas Alarm

3.11.1 Gas-Alarm Light

11), will start beeping. The ALARM light and audible alarm will automatically turn OFF once the detected gas level drops below the gas-alarm level.

3.11.2 Silencing a Gas Al arm

3.12 Clearing the PPM & Faults Data

Up to 200 gas measurements and 30 fault events are stored by the monitor.

To clear stored data, first display the data to be cleared by selecting the PPM LOG or FAULTS function per Section 3.9.4. Next, press both the ENTER and Keypad Right buttons at the same time. A single, long tone should be heard when the data has been successfully cleared.

3.13 Working with the DIAG Function

3.13.1 Overview

The DIAG function displays sensor data and status information useful to a service technician for troubleshooting various fault conditions. Explanations of the data shown in these screens are given below.

3.13.2 Keypad Functions

From the Data Display screen, press any one of the Keypad buttons to display the first Function Menu screen. Next, use the Keypad buttons to move the arrow (>) until it is next to the DIAG function, and then press ENTER to display the first of two Diagnostic screens.

Press the Keypad Up button to toggle between the First and Second Diagnostic screen.

16 Instruction 3015-4787

Page 21

N2O Portable Monitor Operation

0.1ppm 0.01

PPM Level µMole/Liter

4.20885v <0000>

Bench Voltage Fault Code

0.00075n <0000>

Noise Fault Code

3.13.3 Fi rst Diagnostic Screen

29.05cD 14.58psi

35.40cB 14.59psi

In the First Diagnostic screen, the user can toggle between displaying Bench Voltage / Detector Temperature, and Noise / Box Temperature by pressing the Keypad Right button.

Bench Voltage – This is the current peak-to-peak output of the IR detector. In the absence of gas this value can range from 3.90000V to 4.50000V.

Noise –The Noise value is a 16 point running average of the noise portion of the IR detector’s output. This reading is valuable mainly when gas is NOT present.

Detector Temperature – This is the current detector temperature in °C.

Box Temperature – This is the current internal enclosure temperature in °C.

Fault Code – Current fault code. A value of <0000> indicates that no faults are being detected.

Pressure Reading – This is the pressure as measured every purge cycle with the sample pump off and

the gas-sample inlet open. Its value is weather and altitude dependent and can range from 10.0 to

15.5 PSIA.

Detector Temperature °C ∗ Pressure Reading

Box Temperature °C ∗ Pressure Reading

Purge Valve Asterisk (∗) – The purge valve can be opened and closed by pressing the Keypad Left button. An asterisk appears on the display when the purge valve is open causing the monitor to draw air from its purge-air port.

3.13.4 Sec ond Diagnostic Screen

0.00004au 4.210v

PPM Level – Parts Per Million Level is the current detected gas level, and is the volume concentration referenced to standard temperature and pressure.

Average Absorption Unit – This is the optical absorbency. In the absence of gas the absorbency is

0.00000 au. When sampling gas, its value varies proportionally with the gas concentration.

µMoles/Liter – This is the absolute concentration in micro-moles per liter of gas.

Detector Voltage – This is a running average of the IR detector’s bench voltage.

Purge Valve Asterisk (∗) – The purge valve can be opened and closed by pressing the Keypad Left

button. An asterisk appears on the display when the purge valve is open causing the monitor to draw air from its purge-air port.

Avg. Absorption Unit ∗ Detector Voltage

Instruction 3015-4787 17

Page 22

Operation N2O Portable Monitor

14.59 AMB14.75 Pressure Difference Fault Code

3.14 Working with the P-CHK Function

3.14.1 Overview

The P-CHK function (Pressure Check function) (page 13) is useful to a service technician for troubleshooting a flow-fault problem. The monitor will trigger a flow fault if the pressure drop from ambient is less than 0.2 psi during a purge cycle, and 0.5 psi during a measurement cycle.

3.14.2 Keypad Functions

From the Data Display screen, press both the Keypad Left and Right buttons at the same time to display the first Function Menu screen. Next, use the Keypad buttons to move the arrow (>) until it points to the P-CHK function, and then press ENTER to display the Pressure screen.

The Keypad Left button toggles the purge valve open and closed. Note that an asterisk (*) appears when the purge valve is open causing the monitor to draw air from the purge-air bag.

The Keypad Down button toggles the pump ON and OFF.

Pressing the ENTER button stores the current manifold pressure shown on the left to the ambient pressure shown on the right (must be done with the pump OFF).

3.14.3 Screen Displa y

-0.16dif <0000>

Current Manifold Pressure – Current manifold pressure in psia.

Stored Ambient Pressure – Stored ambient pressure in psia.

Pressure Difference – The difference between the current manifold pressure and the stored ambient

pressure.

Fault Code – Current fault code (page 15).

Purge Valve Asterisk (∗) – The purge valve can be opened and closed by pressing the Keypad Left

button. An asterisk appears on the display when the purge valve is open causing the monitor to draw air from the purge-air bag.

Current Manifold Pressure ∗ Stored Ambient Pressure

18 Instruction 3015-4787

Page 23

N2O Portable Monitor Operation

2ndUNIT >PRINT

3.15 Print/Plot Logged Gas Levels

A printout or plot of the last 200 N2O ppm measurements can be made by connecting the optional Bacharach printer and printer cable to the monitor as follows (refer to Section 5.1 for printer and cable part numbers):

1. For a printout or plot to be made, the monitor must have been set up to record gas measurements

using the LOG INT function (page 12).

2. Interconnect the RS-232 connectors located on the printer and monitor.

3. If not already done, refer to the printer manual and set the printer’s communication

parameters to:

• Data bit = 8

• Parity = None

• Baud rate = 19200

• Handshaking = DTR

4. From the Data Display screen, press both the Keypad Left and

Right buttons at the same time to display the first Function Menu screen. Next, use the Keypad buttons to move the arrow (>)

until it points to either PRINT to produce a printout, or PLOT to generate a plot.

5. Press ENTER to start the print/plot process.

PLOT PC-DUMP

Instruction 3015-4787 19

Page 24

Operation N2O Portable Monitor

3.16 Downloadin g Stored Data to a Person al Computer

Using the monitor’s PC DUMP feature (page 13), the last 200 N2O gas readings that were stored in memory can be downloaded to a personal computer in ASCII text, comma-delimited format, which can then be imported into most spreadsheet programs for analysis.

The following describes how to download data to a computer using Windows® HyperTerminal as the communications program. If a different operating system and/or communications program is being used, then consult the appropriate instruction manuals for those products.

1. Install serial data cable P/N 0104-4027 (straight through, 6 foot, DB9 male to DB9 female)

between the computer’s COM port and the analyzer’s RS-232 connector. (For computers having a 25-pin COM port, either use a 25-pin to 9-pin adapter, or use a serial cable with appropriate connectors on each end.)

2. At the computer, start HyperTerminal by doing one of the following:

• If HyperTerminal has already been set up to communicate with the N

O Monitor, then click Start,

point to Programs, point to Accessories, point to Communications, click HyperTerminal, and double-click the file name or icon that has been associated with the N

• If HyperTerminal has never been run in association with the N

O Monitor.

O Monitor, then a new

HyperTerminal connection needs to be made as follows:

a) Click Start; click Run. In the Run box, type “hypertrm.exe” and click OK. The New

Connection dialog box should appear.

b) Type in a New Connection Name such as “N2O”. Click OK to select the default icon (if

desired, select a different icon before clicking OK). The Connect To dialog box should appear.

c) Click the Connect using drop-down menu and choose the COM port to which the analyzer

is connected. Then click OK to display the COM Properties dialog box for that COM port.

d) Set Port Settings to:

- Bits per second: 19200

- Data bits: 8

- Parity: None

- Stop bits: 1

- Flow control: None

Then click OK to display HyperTerminal’s main window.

e) Click File; click Save. This creates a file with an .ht extension in the folder C:\Program

Files\Accessories\Hyper Terminal, using the name that was entered in Step b.

3. After HyperTerminal is running: click Transfer, click Capture Text, and then click Start to accept

the default drive\directory\filename to which all received data will be stored as an ASCII text file.

Note: By default, the captured text file will be stored on the hard drive at C:\Program

Files\Accessories\HyperTerminal\CAPTURE.TXT. If desired, click Browse to select a different drive, directory and filename. The next time data is captured, it will be stored under the same location and filename.

Tip: Changing the filename extension to “CSV” (comma separated variable) will allow the file to be

directly opened in the spreadsheet program. For example, double clicking the filename CAPTURE.CSV in Windows Explorer will automatically start Microsoft Excel and load the file.

20 Instruction 3015-4787

Page 25

N2O Portable Monitor Operation

2ndUNIT PRINT

4. From the Data Display screen, press both the Keypad Left and Right buttons at the same time

to display the first Function Menu screen. Next, use the Keypad buttons to move the arrow (>) until it points to PC-DUMP, and then press the ENTER button to begin the download process.

PLOT >PC-DUMP

5. Observe that the N

is being received. After all data has been transmitted, the N

O Monitor’s screen goes blank and that HyperTerminal displays the data as it

O Monitor re-displays the Function

Menu screen.

6. To stop capturing data and save it, click Transfer, click Capture Text, click Stop.

7. HyperTerminal and the connection to the N

O Monitor can now be closed.

3.17 Importing Saved Data Into a Spreadsheet

A text file that was created as described in Section 3.17 can be imported into spreadsheet programs that are capable of importing comma-delimited files.

The following describes how to generate a spreadsheet from a comma-delimited text file using Microsoft Excel 2003. If you are using a different spreadsheet program, please refer to its instruction manual for information on how to import comma-delimited text files.

1. Start Microsoft Excel.

2. Click Data, Import External Data, and Import Data to display the “Select Data Source” dialog box.

3. Locate file saved earlier. Select file, then click “Open” to display Excel’s “Text Import Wizard.”

4. Choose the “Delimited” original data type option and click Next.

5. Check the “Tab,” “Comma,” and “Space” delimiters and click Finish.

6. Choose “Existing worksheet” or “New worksheet” and click OK to create spreadsheet.

Note: A worksheet must be open in order to import data.

Instruction 3015-4787 21

Page 26

Maintenance N2O Portable Monitor

4 Maintenance

4.1 Disassembly

When servicing the parts inside the N2O Monitor, disassemble the monitor’s metal chassis as follows:

Items Required:

• Medium Phillips head screwdriver

Procedure:

1. Remove monitor and its battery pack from the soft carrying case.

2. Unplug battery pack from monitor.

3. Remove a total of 10 screws from the locations shown in the illustrations below.

4. Carefully separate the metal chassis.

22 Instruction 3015-4787

Page 27

N2O Portable Monitor Maintenance

4.2 Internal Particulate / Hydrophobic Filter Replacement

Items Required:

• Replacement filter (P/N 0007-1654)

• Medium Phillips head screwdriver

Procedure:

1. Disassemble the monitor’s metal chassis per Section 4.1.

2. See illustration below and locate the internal particulate / hydrophobic filter.

3. Pull off tubing from both ends of filter and remove filter from instrument.

4. Attach tubing to new filter

5. Reassemble monitor.

Instruction 3015-4787 23

Page 28

Parts and Service N2O Portable Monitor

5 Parts and Service

5.1 Replacement Parts & Optional Items

Replacement Parts

Item Description Part Number

N2O Monitor 3015-4790

Replacement Battery Kit 3015-5739 Soft Carrying Case with Shoulder Strap 3015-5700 Bladder Bag Kit 3015-5325 Stainless Steel Probe 3015-5326

Filters:

External Filter Hydrophobic Filter External Filter Assembly

Tubing (3 ft) 0003-6182

Replacement Pump 3015-4239

Battery (for main PCB board) 0204-0020

Replacement Bench Kit 3015-5247

3015-2906 0007-1654 3015-5324

Optional Accessories

Item Description Part Number

IrDA Printer Kits, Parts, Accessories

120 VAC (includes printer, 120 VAC adapter, 12V in car charger, belt clip, instruction manual)

230 VAC (includes printer, 230 VAC adapter, 12V in car charger, belt clip, instruction manual)

Thermal Paper Roll 0006-8733 Battery Pack, rechargeable, 7.2V, Li-ion 0024-1244

0024-1229

0024-1230

Cable (DB9 to RJ45) 3015-4214

AC adapter: 120 VAC 230 VAC 12V in car charger

Computer Communications Cable (DB9 male to DB9 female)

24 Instruction 3015-4787

0024-1243 0024-1245 0024-1250

0104-4027

Page 29

N2O Portable Monitor Parts and Service

5.2 Service Centers

Service and replacement parts can be obtained by contacting any of the following Bacharach Service Centers:

United States

Bacharach, Inc. 621 Hunt Valley Circle New Kensington, PA 15068 Phone: 724-334-5051 Fax: 724-334-5723 Email: help@mybacharach.com

Canada

Bacharach of Canada, Inc. 20 Amber St. Unit #7 Markham, Ontario L3R SP4 Canada Phone: 905-470-8985 FAX: 905-470-8963 E-mail: bachcan@idirect.com

Instruction 3015-4787 25

Page 30

Declaration of Conformity N2O Portable Monitor

6 Declaration of Conformity

26 Instruction 3015-4787

Page 31

N2O Portable Monitor

Notes:

Instruction 3015-4787 27

Page 32

621 Hunt Valley Circle, New Kensington, PA 15068-7074

Toll Free: 800-736-4666 • Tel: +1-724-334-5000 • FAX: +1-724-334-5001

Website: www.MyBacharach.com • E-mail: help@MyBacharach.com

Printed in U.S.A. ® Registered Trademark of Bacharach Inc.

Headquarters: