Bacharach ODOROMETER Manual - page 3
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 fl ow 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 effl uent 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 fi ve 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