Instruction manual

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OPERATION AND USE continued from page 9
detection display. If PPM display is selected, the measurement
auto-ranges to LEL at levels above 2000ppm. When equipped
with the optional percent volume sensor the measurement auto-
ranges at 100% LEL. The display will indicate by changing the
unit of measure below the reading to “%v/v”.
6. Prior to use, test the integrity of the sensor cap and tubing.
Use your finger to block the inlet of the sensor cap for 4-5 sec-
onds. The display will read FLOW BLOCKED if all seals are
intact. If this does not occur, change the sensor cap and “O”
rings. A spare sensor cap and “O” rings are supplied with each
instrument. During pump flow block, a beep will occur every 2
seconds and the green LED will flash until the pump restarts
and adequate flow is present.
7. It may be necessary to manually zero the instrument based
on company practices and environmental conditions. Always
zero the instrument in a clean air environment.
8. When testing areas with elevated temperatures such as ap-
pliance vents or flues, always attach the optional hot air probe to
the end of the sensor cap. These connections need only be
finger tight. Failure to use the approved probe can result in dam-
age to the instrument and may void the warranty.
CAUTION: Do not handle the steel portion of any hot
air probe after use as burns may occur!
9. When sampling high areas or overhead lines the use of the
optional extension adapter will allow a broom handle or painters
stick to extend the instrument to the area where sensing must
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OPERATION AND USE continued from page 10
(continued on page 12)
be accomplished. This adapter slides onto the battery sleeve
and is held in place by the locking nut assembly.
10. When sampling areas the appropriate sensors will cause
the display to update when a gas is encountered. Additionally, if
a combustible gas is encountered a series of LEDs on the front
of the instrument will illuminate when the preset concentrations
are reached. If any alarm condition exists for any sensor, based
on their preset alarm points, the red (HAZARD 3) LED will flash
and the alarm will sound unless it is muted.
Additionally, the reading for the gas exceeding the alarm set
point will also flash.
The standard factory preset LED indicators and alarm points
are:
a. Combustible gas: Methane, audio and visual alarm indicators
from 10% LEL to 100% LEL.
i. Green LED/Ready = 0% - 4.9%LEL Methane
ii. Amber LED/Low = 5% - 9.9%LEL Methane
iii. Red LED/Haz1 = 10.0% - 24.9% LEL Methane
iv. Red LED/Haz2 = 25.0% - 49.9% LEL Methane
v. Red Flashing LED/Haz3
METHANE: 50% LEL Methane to 17% volume* Methane
(LED indicator only above 17% volume Methane)
PROPANE: 50% LEL Propane to 12% volume* Propane
(LED indicator only above 12% volume Propane)
*When equipped with percent volume sensor.
b. Oxygen - below 19.5% and above 23.5%