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3700 Portable Samplers
Section 3 Programming Guidelines
Table 3-2 Bottle Volume Settings for Standard Bottle Configurations
Bottle Configuration
24 (polypropylene)
24 (polyethylene)
24 (glass)
12 (polypropylene, glass)
12 (polypropylene, glass)
4 (glass and polyethylene)
1 (glass and polyethylene)
1 (polyethylene)
(NOTE: Under Compatibility, S = 3700 Standard and C = 3700 Compact)
3.9.4 Suction Line
3-40
a nonstandard bottle, enter a bottle volume smaller than the
actual bottle capacity. This will help prevent overfilling. (There
are approximately 3,785 ml per gallon.)
Bottle Size
Bottle-Volume Setting
1000 ml
500 ml
350 ml
945 ml
300 ml
1 gal
2.5 gal
4 gal
Cumulative Error – The sample accuracy is the greater of 10%
of the sample volume or 20 ml and is repeatable to ± 10 ml. Since
samples of 200 ml can vary by 10% or ± 20 ml, the cumulative
error for four samples would be ± 80 ml. If the sampler consis-
tently places an actual sample volume of 220 ml for each of the
four samples, the total volume held by the bottle would be 880
ml. Again, to avoid possible overfilling, enter a bottle volume that
is less than the actual bottle capacity.
You can use the Suction Line configure option to configure the
sampler for the type (vinyl or TEFLON), diameter, and length of
the suction line used. The volumetric delivery varies with line
diameter, type, and length, so it is important that you enter these
settings accurately. An incorrect setting will impair the accuracy
of the sample volume. These settings can also determine the
number of post-sample purge counts. It is important to have suf-
ficient counts to completely clear the line.
If you change the current suction line settings, the ". . . CALCU-
LATING . . . PUMP TABLE VALUES" message will appear for a
short time. Because the volumetric delivery of the sample varies
with the diameter, type, and length of the suction line; the
sampler must revise the internal pump tables. The electronic
pump count uses the tables as reference for sample delivery.
There are three types of suction lines available for use with the
1
3700 sampler:
/
-inch vinyl,
4
("Teflon"). If you specify
for the line length immediately. If you specify
sampler prompts you to specify vinyl or PTFE before prompting
for the line length. (Display #s 230 and 231)
The sampler will accept suction line lengths of 3 to 99 feet. When
measuring the line, do not include the tube coupling or the
strainer in the measurement. The line should be cut to even foot
lengths, such as 6, not 6.5, feet. (Display #232)
Compatibility
1000
500
350
945
300
3800
9400
15,000
3
/
-inch vinyl, and
8
1
/
-inch line, the sampler will prompt you
4
S
C
S
S
C
S
S, C
S
3
/
-inch PTFE
8
3
/
-inch line, the
8
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