Analytical Technology A15 Spécifications télécharger pdf (Page 36)

ATI A15/66 Residual Sulfite Monitor

O&M Manual

Rev-W (8/10)

PUMP TUBING REPLACEMENT

Peristaltic pump tubing should be changed every 6 months. One set of replacement tubing is

supplied with the unit and additional tube sets are available in packages of 5 (see spare parts list). If

tubing wear or leakage is noted in less than 6 months, tubing should also be replaced immediately. It is

unlikely that reagent feed tubing will require more frequent replacement, but grit in the incoming sample

can cause wear on the sample tubing, shortening the replacement interval.

Prior to replacing reagent pump tubing, carefully remove the pickup tube from the acid bottle and

place the end in a container of tap water. Allow the system to run for 15 minutes to purge the inside the

tubing of acid. Do not replace acid pump tubing without first purging with water.

Prior to replacing the sample pump tubing, remove the pickup tube from the inlet of the overflow

assembly. Allow the pump to run for 2-3 minutes to pump out all of the sample.

Replacement of pump tubing is very simple with the quick loading pump heads used in this

system. Follow the procedure below for both the sample and reagent pump heads. Turn off power to the

chemistry module prior to replacing pump tubes.

1. Remove the tubing clamp plate from the rear of the pump. This is done by gently pressing in on the

sides of the plate and pulling it backward. See figure 11 for an exploded view.

2. Pull the tube retaining blocks out of the slots on the top and bottom of the pump. The tubing and

blocks will come free from the pump drive.

3. Replacement tubes are precut to the proper length. For acid feed tubes, place the tubing into the

retaining blocks and reinstall the bottom block. Pull the tube around the roller and install the top

block.

4. Sample tube replacement is a little more involved as you need to remove the 3-way valve is part of

the assembly. Remove the tubing clamp plate at the back of the pump and then remove the top and

bottom retaining blocks. The valve will be attached to the bottom retaining block. Remove the valve

and set it aside. Push on the tubing from inside the retaining block so that the fitting slides out of the

block. Pull the old tubing off the fitting and replace with a new tube, making sure that the tubing is

pushed onto the connector up to the stop. Attach the valve to the fitting before inserting the fitting in

the retaining block. Rotate the fitting so that one of the inlet barbs on the valve points straight down

when the retaining block is reattached to the pump. Put the clamp plate onto the back of the pump.

5. Before restarting sample flow, be sure to reconnect the sample tube on the right side of the 3-way

valve. Inspect all other fitting to be sure everything is properly assembled and then restart sample

flow.

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Analytical Technology A15 Spécifications Page 36