ISCO 6700SR - How Does the Sampler Work

6700SR Refrigerated Sampler
44
How Does the Sampler Work?
When the sampler takes a sample, it draws liquid through the
strainer and suction line to the pump tube. The liquid flows
through the pump tube, past the liquid detector, which senses the
liquid. From the detector, the liquid follows the pump tube through
the pump to the bulkhead fitting and then through the discharge
tube to the sample bottle.
A typical sampling cycle consists of:
1. The sampler moves the distributor arm over the bottle that
is to receive the sample.
2. The pump reverses for the presample purge.
3. The pump direction changes, filling the suction line.
4. When the detector senses liquid, the sampler begins measur-
ing the sample. (See Measuring Sample Volume on page 45.)
5. After depositing the sample, the pump again reverses for the
postsample purge.
S
TRAINER
D
IMENSIONS
A
PPLICATION
M
AXIMUM
D
EPTH
Stainless Steel
Priority-
pollutant
sampling.
Vinyl Line:
22 feet.
Teflon Line:
15 feet.
Polypropylene
Routine
applications.
Vinyl Line:
11 feet.
CPVC
Highly acidic
liquids.
Vinyl Line:
4 feet.
Stainless Steel
Low-Flow
Very low flow
stream depths.
Vinyl Line:
7 feet.
Notes: • The suction lines will float when filled with air during the purge cycles and when depths exceed the listed
ratings. Secure the suction lines when sampling at depths exceeding the maximum ratings.
• All strainer dimensions are in inches.
• Teflon suction line is compatible only with the 1 inch diameter, stainless steel strainer.
Table 7 Selecting the Right Strainer
9-9/32
23/32
1.0
diameter
1-1/8
diameter
.430
diameter
9-5/8
23/32
1.0
diameter
1-1/4
diameter
.430
diameter
11-1/4
1-5/8
diameter
1-1/4
diameter
23/32
.430
diameter
9/16
diameter
7
1
.430
diameter