ODOROMETER
Instruction 0023-9125 Page 7
8. HOW TO USE THE ODOROMETER GAS CALIBRATION CHART
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 70; 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).
NOTE:
The chart below is intended as an example only and does not reflect the calibration of
your instrument. See actual calibration graph on your instrument.
Your ODOROMETER was calibrated against standards traceable to the National Institute of Standards and
Technology (NIST) prior to its shipment from the factory. To ensure the instrument’s continued accuracy 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 calibration.
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 locations.
Bacharach Sales/Service Center
621 Hunt Valley Circle
New Kensington, PA 15068
Phone: 724-334-5051
Fax: 724-334-5723
Email: help@bacharach-inc.com
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
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 ammeter 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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