Bacharach ODOROMETER Manuale utente

INSTRUCTION 0023-9125

ODOROMETER

Portable Gas Odorant Tester

Part Number 5110-0200

Operation/Maintenance

Rev. 16 – May 2010

World Headquarters

621 Hunt Valley Circle, New Kensington, PA 15068

Ph: 724-334-5000 • Fax: 724-334-5001 • Toll Free: 800-736-4666

Website: www.mybacharach.com • E-mail: [email protected]

Printed in U.S.A. ®Registered Trademark

WARNING!

Because this instrument is used to detect and monitor materials and

conditions which are listed by OSHA or others as potentially hazardous

to personnel and property, the information in this manual must be fully

understood and utilized to ensure that the instrument is operating prop-

erly and is both used and maintained in the proper manner by qualiﬁed

personnel. An instrument that is not properly calibrated, operated and

maintained by qualiﬁed personnel is likely to provide erroneous infor-

mation, which could prevent user awareness of a potentially hazardous

situation for the instrument user, other personnel and property.

If, after reading the information in this manual, the user has questions

regarding the operation, application or maintenance of the instrument,

supervisory or training assistance should be obtained before use. Factory

assistance is available by calling 724-334-5000.

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 one (1) year 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 limited to the removal 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 forth in paragraph 1 does not apply to parts the Operating Instructions designate as having a

limited shelf-life or as being expended in normal use.

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 TORT, 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 inci-

dental or consequential damages. No agreement varying or extending the foregoing warranties, remedies or this

limitation will be binding upon Bacharach, Inc. unless in writing, signed by a duly authorized ofﬁcer of Bacharach.

Batteries, being expendable items, are excluded from the terms of this warranty.

Instruction 0023-9125 Page-3

ODOROMETER

The ODOROMETER is a portable instrument that can be used by gas

companies to check the odorization of the gas being distributed. The in-

strument provides an easy method of determining the odor intensity of a

gas stream at any convenient point in the gas distribution or transmission

lines, and is a faster method of determining odor levels at high or low

gas-air concentrations than the room-test method. The range of testing

on the standard instrument is from one-twentieth of 1% to slightly over

l% gas in air. This range enables the operator to check the accepted gas

concentrations for the detection of an odorant in natural gas.

The ODOROMETER may also be used to perform natural gas odor inten-

sity tests in accordance with ASTM D 6273-98. (ASTM is the American

Society for Testing and Materials.)

The ODOROMETER uses a constant-speed motor-driven blower to pro-

duce a constant ﬂow of air, which is discharged from a glass SNIFFING

FUNNEL through an opening in the top of the case, where the operator

can sniff it conveniently for the presence of detectable odor. The gas to be

tested is supplied to the instrument under its own pressure and metered

by a FLOWMETER (also known as a Rotameter) and needle valve. The

concentration of gas in the efﬂuent air is determined from the FLOWMETER

reading by reference to the calibration chart on the inside of the front cover.

The instrument components are mounted on an anodized aluminum panel

which, in turn, mounts inside an anodized aluminum case. All metal and

instrument surfaces have been chosen so that no outgas problems will

occur. Make sure not to use any chemicals on the instrument that would

give off residual odors.

The ODOROMETER is a DC model completely independent of the power

line and takes power from a battery pack consisting of ﬁve size-D Alka-

line cells. This model is adjusted at the factory for proper blower speed

and contains a front panel POWER LED which indicates that the unit is

working properly.

NOTE: Two older versions of the ODOROMETER, an AC and

DC model are still in use, and supported by Bacharach Inc.

The AC model uses a shaded-pole constant-speed motor to drive

the blower, and the instrument is equipped with a line cord for

convenient connection to any 115 volt 60 cycle power source.

The blower speed of the DC model is controlled by a rheostat

and is set using the reading of the built-in milliammeter.

Because there are slight differences in the three models, the old-

er models will be referred to in Appendix A, which only needs to

be referenced when using one of these older models.

OPERATING AND MAINTENANCE INSTRUCTIONS

For The

ODOROMETER

1. APPLICATION

2. DESCRIPTION

Page-4 Instruction 0023-9125

ODOROMETER

1. Make sure batteries are in place (See Appendix A-1 for AC models).

2. The gas supply should be connected to the inlet ﬁtting on the front

panel, and pressure should be below 5 psig. Connection should be

made with aluminum or plastic tubing only; do not use copper or

rubber, as these tend to remove odorant compounds. A 6 foot length

of suitable plastic tubing is supplied with the instrument.

3. Where possible, tests should be run in an odor and draft free area.

4. Set the instrument on a level bench or desk. Swing the handle down,

and the top cover open. Switch the unit "ON" (Clockwise), the green

POWER LED should light (See Appendix A-2 for older models).

NOTE: If the LED goes out after a few seconds, replace the batteries.

5. The GAS INLET NEEDLE VALVE is located in the center of the

panel. Open the valve slowly while snifﬁng the air being discharged

from the SNIFFER FUNNEL opening in the top of case.

ODOROMETER

3. OPERATING

INSTRUCTIONS

ODOROMETER

ON - OFF

SWITCH POWER

LED

GAS INLET

NEEDLE

VALVE

SNIFFING

FUNNEL

FLOWMETER

GAS

INLET

FITTING

AIR

INLET

Instruction 0023-9125 Page-5

ODOROMETER

6. The observer must be careful to hold his nose within one inch of the

SNIFFING FUNNEL to avoid dilution with the surrounding air

(placing the upper lip on the handle will allow the nose to be cen-

tered about one inch above the SNIFFING FUNNEL).

7. Odor level rating must be based on the ﬁrst sniff or two because the

olfactory senses fatigue rapidly with continued exposure to an odor.

8. Between sniffs the observer should breathe deeply but slowly

through his nose to “regenerate” his perception.

1. Have the observers sniff the unodorized air stream.

2. Adjust the gas ﬂow rate to the estimated threshold value and let the

observers sniff again to see if they can smell any foreign odor.

3. Adjust the gas concentration upward or downward, as indicated by

the above test, and have the observers sniff again.

4. Repeat this procedure until the threshold value is obtained for each

observer. It is best to take several readings on both sides of the

threshold and to run an occasional blank using air with no added

gas.

5. Calculate the average threshold value of each observer. Then

calculate the total average value, using these individual averages.

This procedure is advisable because considerable variation is found

among individuals in detecting threshold value. Thus, if the observ-

ers take different numbers of readings, a “straight” average of all

these values would give more weight to the observer with the larger

number of readings.

6. It is essential for this type of determination that the odor level rat-

ing be based on the ﬁrst sniff only, because fatigue is very rapid in

this range.

1. Have the observers sniff the unodorized air stream.

2. Adjust the gas rate to the desired concentration.

3. Have the observers sniff the efﬂuent air stream, rating the odor in-

tensity as (1) absent, (2) barely detectable, (3) readily detectable, (4)

strong, (5) very strong (obnoxious).

4. If desired, a description of the character of the odor, such as onion,

garbage, reﬁnery, etc., can also be obtained.

5. Repeat the test after a short time to check the ﬁrst determination.

4. THRESHOLD

ODOR

DETERMINATION

5. ODOR

CHARACTERISTICS

AT STANDARD

CONCENTRATION

Page-6 Instruction 0023-9125

ODOROMETER

The instrument has two ranges, obtained by using a lightweight glass

and a heavier metal ﬂoat, both in the same metering tube. Take readings

on the glass ﬂoat when both are within the range of measurement; take

readings on the metal ﬂoat when the glass ﬂoat reaches the top of the tube.

Useful ranges are approximately 0.04 to 0.4% for the glass ﬂoat, and 0.2

to 1.1% for the metal ﬂoat.

When taking readings, observe the FLOWMETER graduation corresponding

to the bottom of the ball ﬂoat. Find the gas concentration corresponding to

this reading by looking at the calibration chart on the inside of the front

cover. This chart has been drawn to give the percent gas concentration over

the useful ranges for natural gas with a speciﬁc gravity of 0.620 relative

to air. Concentrations of gases of other densities may be read using the

correction factors shown on the graph below the calibration chart.

The FLOWMETER tube and ﬂoats must be kept clean to prevent

sticking of the ﬂoats in the tube. To disassemble, press the sides of the

plastic cover and pull out. Remove the spring lock clip at the top of tube,

lift the tube connector and pull tube out, by lifting from the bottom con-

nectors. Tube and ﬂoats can be washed in alcohol, trichloroethylene or

other solvent.

When the odor (mercaptan) in gas has been detected, observe the reading

indicated by the FLOWMETER ﬂoat. Depending on the range required,

use either the upper glass ﬂoat (colored) for values 0.04 to 0.4% or lower

metal ﬂoat (silver) for values 0.2 to 1.2%.

EXAMPLE: FLOWMETER (silver ﬂoat) indicates 7; use second curve and

observe that percent gas indicated by the chart is 1.1% (%

GAS IN ODOROMETER EFFLUENT). If speciﬁc gravity of

gas under test is 0.620, the correct percentage of gas is as

noted on the curve (1.1%). If speciﬁc gravity differs, use the

CORRECTION CHART below.

EXAMPLE: Speciﬁc gravity of gas under test is 0.55, the correction factor

noted on the chart is 1.06. The correct gas concentration is

obtained by multiplying the following:

1.1% x 1.06 = 1.166% (Gas in ODOROMETER Efﬂuent).

6. RANGE OF

MEASUREMENT

7. MAINTENANCE

8. HOW TO USE THE

ODOROMETERGAS

CALIBRATION

CHART

Instruction 0023-9125 Page-7

ODOROMETER

ODOROMETER GAS CALIBRATION CHART

This chart is intended as an example only and does not reﬂect the cali-

bration of your instrument. See actual calibration graph on your instru-

ment.

Your ODOROMETER was calibrated against standards traceable to

Page-8 Instruction 0023-9125

ODOROMETER

the National Institute of Standards and Technology (NIST) prior to its

shipment from the factory. To ensure the instrufment’s continued ac-

curacy and reliability, Bacharach recommends periodic calibration by an

authorized Bacharach Service Facility. For best results, the instrument

should be initially calibrated after no longer than one year of service.

Thereafter, the calibration interval should be set as needed to ensure

continued reliability. If calibrated by a Bacharach Service Facility,

the assigned interval will be based upon the instrument’s condition as

received, in or out-of-tolerance and degree of drift since the last calibra-

tion.

Bacharach recommends that service on portable instruments, in or out

of warranty, be performed at one of our Service Centers. Should service

be required, please pack the instrument carefully, include all necessary

identifying papers (with description of service needed), and ship prepaid

to one of the below:

9. SERVICE

United States

Bacharach Sales/Service Center

621 Hunt Valley Circle

New Kensington, PA 15068

Phone: 724-334-5051

Fax: 724-334-5723

Email: [email protected]

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: [email protected]

Instruction 0023-9125 Page-9

ODOROMETER

APPENDIX A OLDER VERSIONS OF THE ODOROMETER

1. Instruments designed to operate from AC will operate from any 115

volt, 60 Hz power source.

2. For the DC model, start motor by turning switch clockwise to “ON”

and rotating the knob clockwise until air ﬂow is achieved. Set am-

meter to red mark for proper amount of air ﬂow. For the AC model,

just plug in line cord and turn on switch to start air ﬂow. Pilot light

will indicate that power is connected to motor.

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