6100CR Refrigerated Sampler - Isco

6100CR Refrigerated Sampler
Section 1 Introduction
1.1.1 Connection to
Pressurized Line
The Refrigerated Sampler is permanently connected to a pressurized
discharge line from which the sample liquid is periodically
drawn. A filter on this line prevents any solids present in
the effluent from entering the sampler. A valve allows sample to
flow only when the 6100CR needs to take a sample. A pressure
regulator reduces the line pressure to a safe fill value. Once
inside the refrigerated sampler, the sample flows through a serpentine
coil inside an aluminum container (the ballast) at the
bottom of the refrigerator for cooling before injection into the
sample vials. Waste sample is discharged from the drain line.
1.1.2 Controller Operation The microprocessor in the controller governs the operation of the
mechanism that selects, opens, fills, and closes the sample
bottles. A motor rotates the bottle rack placing each bottle
directly under the fill mechanism. The bottle rack is kept chilled
by its location inside the refrigerator. When the filled rack is sent
to a lab for analysis, it may be kept cold by filling the inside of
the rack with ice and placing in the styrofoam mailer to keep
samples cool during the transport to the lab for analysis.
The fill operation consists of:
• Purging the sample line
• Rotating the bottle rack to place the bottle in position for
filling
• Opening the valve on the sample bottle cap
• Lowering the fill needle into the sample bottle
• Filling the sample bottle with the liquid sample
• Withdrawing the fill needle from the sample bottle
• Closing the valve on the sample bottle
When filling the sample bottle, the 6100CR actually overflows
the bottle to comply with EPA protocol to fill and dump the
sample bottle. This overfilling keeps residual air pockets from
remaining between the bottle and the lid, thus providing a representative
sample. The excess water drains out of the sampler
through an overflow tube attached to a fitting on the back of the
controller. The controller also determines, through programming,
when and how the 6100CR takes its samples.
1.2 Quick-Start Operating
Procedure
Note that the quick-start procedure assumes you have some
familiarity with the unit. If you do not, please do not try to
operate the unit without first reading this entire document.
1. Put a new bottle rack in the unit. Make sure the handles
on the bottles are all closed (turned sideways 90° to the
bottles). See Figure 1-2. Improperly oriented handles will
jam the unit.
2. Turn the unit on by pressing the On/Off key on the keypad.
When the unit is off, the display will be blank. When
the unit is on, there will always be something on the display.
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