Doc No 360-0027-01
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• If the proper detector tube for a particular application is not chosen, correct
readings cannot be obtained. Choose detector tubes carefully using the tube
selection guide and pay strict attention to chemical names and measuring
ranges.
• When gases other than the target gas are also suspected, refer to the tube
instructions for a list of known interfering compounds and their relative affect
on the reading. Consult the tube selection guide or handbook for tubes that
can monitor those gases.
• A detector tube is designed for a single use; do not re-use detector tubes.
• A detector tube should be used immediately after breaking the ends. Detector
tubes exposed to the air for a long time after breaking the ends will give
erroneous readings, and may not respond to the target gas at all.
• Read the concentration immediately after completion of measurement. If not
read immediately, the stain may lengthen or fade, which can lead to
erroneous readings.
• A leaking pump will produce low readings. Always check the pump for
leakage before use in accordance with section “CHECKING PRIOR TO USE”.
• The temperature range for use of detector tubes in general is 0 to 40 degrees
C. When using detector tubes at temperatures outside of the above range,
refer to the section “MEASUREMENT UNDER SPECIAL CONDITIONS.”
• Do not drop or strike the pump. If the cylinder is dented, it will impede the
handle operation and possibly cause leakage.
• Should the pump be disassembled, hand tighten only on re-assembly. Over-
tightening can damage threads.
• Clean the pump only with a dry paper towel. Do not use water or solvents.
• Do not store the pump in the areas of high temperature or high humidity. Do
not store with the handle extended, as the pump shaft is susceptible to
bending under stress.
• It is recommended that service repair be done only by authorized service
centers. Any service or repair must be followed by a leak check prior to field
use.
• Note that the AP-20S pump is a vacuum pump only, and it cannot be used for
specialized detector tubes that require sample entry by pressure (Oxygen,
Hydrogen, Propane, etc.)
DISPOSAL OF DETECTOR TUBES
A detector tube contains a chemical reagent which reacts with the target
gas.The chemical reagents used vary among different types of detector
tubes,and may include substances regulated by laws for proper disposal.
When discarding used detector tubes, dispose of them in accordance
with local disposal regulations. For further information contact your local
distributor or the manufacturer’s head office or branches.
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