Gastec 155 Instructions

GASTEC
No.155
Instructions for
Methyl Cyclohexanone Detector Tube
FOR SAFE OPERATION :
Carefully read this manual and the instruction manual of your Gastec Gas Sampling Pump.
,&
WARNING:
1. Use only Gastec detector tubes in a Gastec Pump.
2. Do not interchange or use non-Gastec parts or components in Gastec's detector tube and
pump system.
3. The use of non-Gastec parts or components in Gastec's detector tube and pump system, or
use of a non-Gastec detector tube with a Gastec pump, or use of a Gastec detector tube with
a non-Gastec pump may result in property damage, serious bodily injury, and death; voids all
warranties; and voids all performance and data accuracy guarantees.
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CAUTION : If you do not observe the following precautions, you may
suffer injuries or damage the product.
1. When breaking the tube ends, keep away from eyes.
2. Do not touch the broken glass tubes, pieces or reagent with bare hand(s).
3. The sampling time represents the time necessary to draw the air sample through the tube.
The tube must be positioned in the desired sampling area for the entire sampling time or until
the flow finish indicator indicates the end of the sample.
.6.NOTES : For maintaining performance and reliability of the test
results, observe the following.
1. Use Gastec Gas Sampling Pump together with Gastec Detector Tubes only for the purposes
specified in the instruction manual of the detector tube.
2. Use this tube within the temperature range of O - 40°C (32 - 104°F ).
3. Use this tube within the relative humidity range of O - 90%.
4. This tube may be interfered with by the coexisting gases. Please refer to the table
"INTERFERENCES" below.
5. Shelf life and storage condition of the tube are marked on the label of the box of tube.
APPLICATION OF THE TUBE :
Use this tube for detecting Methyl cyclohexanone in the air or in industrial areas and for
determining the environmental atmospheric condition.
SPECIFICATION :
(Because of Gastec's commitment to continued improvement, specifications are subject to
change without notice.)
Measuring Range 2-50 oom 50-80 ppm
Number of Pump Strokes
3
2
Correction Factor 1 1.6
Sampling Time
3 minutes oer oumo stroke
Detecting Limit 0.2 ppm ( n
=
3 )
Colour Change Pale Yellow
-+
Yellow
Methyl cyclohexanone reacts with 2,4-dinitrophenylhydrazine to
Reaction Principle form dinitrophenylhydrazone to produce yellow in colour
C1H120
+
CsH3(N02)2NHNH2
-+
(CH3)2C:NNHCsH3(N02)2
Coefficient of Variation : 15% (for 2 to 1 O ppm), 10% (for 1 O to 50 ppm)
**Shelf Life : Please refer to the validity date printed on the box of tubes.
**Store the tubes at 10°C (50°F) or below in a refrigerator.
CORRECTION FOR TEMPERATURE, HUMIDITY AND PRESSURE:
Calibration of the Gastec detector Tube No.155 is based on a tube temperature of 20°C
(68°F) and not the temperature of the gas being sampled, approximately 50% relative
humidity and normal atmospheric pressure.
Temperature : Correct for temperature by the table below :
Tube
True Concentration (ppm)
Reading
0°C 5°C 10°C 15°C 20°C 25°C
(ppm) (32°F) (41°F) (50°F)
(59°F)
(68°F) (77°F)
50 89 64 56 52 50
30 43
36 33
31
30
20
26 23 22 20 20
10 11 11 10 10 10
5 5 5 5 5 5
2 2 2 2 2 2
Humidity : No correction is required between O - 90% R.H.
Pressure : To correct for pressure, use the formula below
Tube Reading* (ppm)
x
1013 (hPa)
Atmospheric Pressure (hPa)
45
29
20
10
5
2
30°C
(86°F)
44
29
20
10
5
2
*
This value is after other correction(s), if any, are applied.
MEASUREMENT PROCEDURE:
35°C 40°C
(95°F) (104°F)
43 43
28 28
19 19
10 10
5 5
2 2
1. For checking the leakage of the pump, insert a fresh sealed detector tube into the pump.
Follow instructions provided with the pump operating manual.
2. Break tips off a fresh detector tube with the tube tip breaker of the pump.
3. Insert the tube into the pump inlet with arrow ( G► ) on the tube pointing toward pump.
4. Make certain the pump handle is all the way in. Align the guide mark on the pump body with
the guide mark on the handle.
5. Pull the handle all the way out until it locks at one pump stroke (100 ml). Wait three minutes
and confirm the completion of the sampling. Repeat the above sampling procedure two more
times.