8
4. Open the gas supply outlet valve and the ODORATOR 2 Flow Metering Valve fully for
about 10 seconds to purge the air out of the sample hose and condition the instrument. Do
not sniff the exhaust while conditioning.
5. It is recommended to perform a Flow Self-Test at the start of each day of testing or when a
test reading is suspect. With the Flow Metering Valve fully open, to perform a Flow Self-
Test
, press the “SELF TEST” key. If no gas flow is detected, “OPEN” “VALVE” and the
ERROR icon will be displayed for 5 seconds before returning to live readings. Check the
gas supply and all valves prior to repeating the Flow Self-
Test by again pressing the “SELF
TEST” key. To pass Flow Self-Test the flow must be sufficient to produce a reading greater
than or equal to the calibration target value (typically 1.00 %) and then SELF TEST OK and
the reading will be displayed for 5 seconds before returning to live readings. If the Flow
Self-Test reading is less than the calibration target value the Flow Self-Test will fail -
ERROR and the reading will be displayed for 5 seconds before returning to live readings.
Check the gas supply and all valves prior to repeating the Flow Self-Test by again pressing
the “SELF TEST” key. It is recommended to not use the ODORATOR 2 for odor level
testing if the Flow Self-Test fails. All Flow Self-Test results are recorded. Fully close the
Flow Metering Valve after performing a Flow Self-Test, wait about 30 seconds and do not
sniff the exhaust port during a Flow Self-Test.
6. Close the Flow Metering Valve.
Do not force, finger tighten only!
7. Wait about 30 seconds and then position the nose approximately 3/4 inch (20 mm) above
the exhaust port and sniff the exhaust. The exhaust must be un-odorized. If odorant is
detected, the ODORATOR 2 must not be used for odor level testing.
8. Press the
“ZERO” key to automatically zero the reading. If gas flow is detected, “CLOSE”
“VALVE” will be displayed for 5 seconds before returning to live readings. Verify all valves
are closed before repeating zeroing by again pressing the “ZERO” key. While zeroing, the
ZERO icon will flash. When complete, the new zero reading along with the non-flashing
ZERO and VIEW icons will be held in the display.
9.
Press the “READ” key and the LCD will show “TDL” for performing a
Threshold Detection
Level
(TDL) test.
10. To perform a TDL test, slowly open the Flow Metering Valve counter-clockwise by 1/4
– ½
turn, wait about 30 seconds, position the nose approximately 3/4 inch (20 mm) above the
exhaust port and sniff the exhaust. Your upper lip may lightly touch the front edge of the
exhaust port.
11. If no odor is detected in the exhaust, repeat step 10.
**NOTE**
The operator should frequently pause when sniffing for odorant by moving the
nose away from the instrument, breathing fresh air and then continue testing. This
precaution is necessary because the sense of smell fatigues rapidly during this type of
test.
12. The
first faint smell
of odor is called the TDL level. Considerable variation will exist
among individuals in detecting this threshold level. When detected,
press the “READ” key
to record the corrected TDL reading level along with GNSS location and timestamp.
13.
The LCD will show “RDL” for performing a
Readily Detectable Level
(RDL) test. Slowly
open the Flow Metering Valve another 1/4
– 1/2 turn, wait about 30 seconds, position the
