2
)
Turn the pump handle right or left by 1/4
(
90
o
)
, push it toward to the pump.
3
)
Insert the new tube into the aspirating pump.
4
)
Pull the pump handle at a 1/2 stroke until it locks and wait for 30 seconds or until the completion of sampling
is confirmed with the flow indicator of the pump.
5
)
On completion of sampling, read the scale at the maximum point of the stained layer.
6
)
Then multiply the reading value by 2.
SPECIAL NOTE:
Ⅰ
. The scale is calibrated at 20
℃
(68°F), 50 %R.H. and 1013hPa. Readings
obtained in other circumstances should be corrected. (
REFER TO ITEM 4.
CORRECTION FOR AMBIENT CONDITIONS.
)
Ⅱ
. When the maximum point of the stained layer is unclear or oblique, read the
scale at the centre between the longest and shortest points.
3. CORRECTION FOR AMBIENT CONDITIONS:
①
Temperature; No correction is necessary.
②
Humidity; No correction is necessary.
③
Atmospheric Pressure; True concentration = Tube reading
×
1013
Atmospheric pressure
(
in hPa
)
4. INTERFERENCE:
Hydrogen sulphide produces yellowish brown stain and gives higher readings. Arsine and Hydrogen selenide
produces similar stain and gives higher readings. Mercaptans or Bromine produce yellowish stain and give
higher readings.
5. CHEMICAL REACTION IN THE DETECTOR TUBE:
By reacting with silver compound, reagent is discoloured.
6. DISPOSAL OF TUBES:
USED TUBES SHOULD BE DISPOSED CAREFULLY ACCORDING TO RELEVANT REGULATIONS,
IF ANY.
7. HAZARDOUS AND DANGEROUS PROPERTIES OF PHOSPHINE:
TLV-TWA
◆
: 0.05 ppm
Explosion range in air
: More than 1.8 %
◆
Threshold Limit Value established by the American Conference of Governmental Industrial Hygienists, 2019.
8. INSPECTION OF ASPIRATING PUMP:
Checking for leaks;
①
Insert a sealed and unbroken detector tube into the pump.
②
Align the guide marks on the shaft and stopper of the pump.
③
Pull the handle to a full stroke and wait for 1 minute.
④
Unlock the handle and allow it to return slowly into the pump with holding the cylinder and handle securely.
CAUTION
HANDLE WILL TEND TO SNAP BACK INTO THE PUMP QUICKLY.
⑤
If the handle returns completely to the original position, the performance is satisfactory. Otherwise, refer to
maintenance procedures shown in the instruction manual of the pump to correct the leakage.
9. USER RESPONSIBILITY:
It is the sole responsibility of the user of this equipment to ensure that the equipment is operated,
maintained, and repaired in strict accordance with these instructions and the instructions provided with
each Model AP-20, AP-20S, 400B aspirating pump, and that detector tubes are not used beyond their
expiration date or have a colour change different to that stated in the Performance specifications.
The Manufacturer and Manufacturer's Distributors shall not be otherwise liable for any incorrect
measurement or any damages, whether damages result from negligence or otherwise.
※
Product specifications are subject to change without any prior notice.
IME1218
Printed in Japan
