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3700 Portable Samplers
Section 4 Options and Interfacing Equipment
4.1 Introduction
4.2 Composite Sampling
4.2.1 Conversion Procedure
This section discusses major options available with the Teledyne
Isco 3700 Standard and Compact Samplers. Included is infor-
mation about:
• Conversion for composite sampling
• Programming and configuring the controller for
composite sampling
• Connection to Teledyne Isco and non-Isco Flow meters
• Interface devices
• Master/Slave operation
• Use with the 1640 Liquid Level Actuator
The 3700 Standard and Compact Samplers are fully program-
mable for time-paced and flow-paced composite sampling. The
object of composite sampling is to collect a series of discrete,
equal-volume samples at known time or flow intervals, and to
place these samples into a single composite sample container.
To prepare your 3700 Standard for composite sampling, you must
convert the center section. To do so, remove the distributor arm
assembly, install a shorter pump tube, and install the optional
composite shut-off float cage assembly. With the portable, com-
plete the preparation by the adding a composite sample con-
tainer and locating ring in the standard bottle base or an
optional composite base. With the compact, remove the inner
sleeve and install the proper bottle configuration for composite
sampling.
These are the listed steps needed to convert the 3700:
1. Separate the center section from the remainder of the sam-
pler.
2. Remove the pump tube and distributor arm from the sam-
pler, as described in Removing the Pump Tube (Section 5).
3. Turn the center section over, as shown in Figure 4-1, and
install the optional float and float cage. You should install
the shaft on the "diving-bell" float in the hole in the distrib-
utor shaft, as shown. Attach the float cage to the underside
of the center section using the four screws and the 1-inch
spacers provided with the float-cage kit.
When attaching the cage, reuse the existing lockwash-
ers.Be sure the float cage is oriented with the tube guide
positioned as shown in Figure 4-1. The float and float cage
direct the discharge of the sample into the composite con-
4-1
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