LaMotte JT-1 User manual
WATER SAMPLER
MODEL JT-1 • CODE 1077
INTRODUCTION
The LaMotte Water Sampler is designed to take a 1.0 liter sample in water
with a depth of 5 meters or more. It is attached to a calibrated line which
is used to measure the depth at which samples are obtained. The line is
marked at 0.5 meter and 1 meter increments. A horizontal triggering
device is activated by a brass messenger which is sent down the line to trip
the closing mechanism and release the two fitted plungers. These plungers
provide a positive seal and prevent the sample from mixing with
intermediate layers of water as the sample is brought to the surface. A lead
collar has been added to the water sampler to insure rapid descent and to
minimize drifting due to current movements. The materials which were
chosen to make the sampler were selected for their ability to prevent any
contamination of the sampled water. Attached to the sampling chamber is
a special drain outlet for removing sample aliquots. All components of the
LaMotte Water Sampler are made with non-corrosive materials.
LMott
Messenger
Trigger A
Plunger A
Plunger A Cable
Outlet
Trigger B
Plunger B
Plunger B Cable
Outlet
Retaining Cables
METHOD FOR COLLECTING WATER SAMPLES
1. To set the trigger mechanisms, hold the sampler by the brass handle
with triggers in the “up” position. Pull the cable attached to Plunger
A outward and hook the loop over Trigger A. This will remove
Plunger A from sampling chamber.
2. After the loop is hooked over Trigger A, attach the other loop to
Trigger B. This will remove Plunger B from sampling chamber.
3. The water sampler is now cocked and ready to be lowered into the
water.
4. While holding the brass messenger in one hand, steadily lower the
water sampler by the calibrated line until the desired depth is
reached. The line is marked at 0.5 meter and 1 meter increments.
5. Hold the line in a vertical position over the sampler and release the
messenger to travel down the graduated line. After the messenger
trips the closing mechanism, the sample within the collection
chamber is sealed from mixing with unsampled water.
NOTE: A slight tug on the line after the messenger had been
released signals the sampler has closed.
6. Gradually pull the water sampler to the surface with the line and
carefully rest sampler on level surface.
7. Aliquots or portions of the sample are carefully taken by standing the
water sampler upright on Plunger A and unclamping the outlet
tubing. Partially remove Plunger B to prevent formation of a vacuum.
NOTE: Using the JT-1 sampler at a depth of less than 5 meters may
damage the trigger.
LaMOTTE COMPANY
Helping People Solve Analytical ChallengesSM
PO Box 329 • Chestertown • Maryland • 21620 • USA
800-344-3100 • 410-778-3100 (Outside U.S.A.) • Fax 410-778-6394
Visit us on the web at www.lamotte.com
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