TM8400B-L-00
1 November 2004
Step 2. Set TEMPERATURE SENSOR switch to NORMAL. Wait until both heater
lamps are cycling steadily.
Step 3. Set TEMPERATURE SENSOR switch first to 1 and then to 2, check that
the two heater lamps are initially on or off but begin to cycle within 4-5
minutes on each position.
Step 4. Return TEMPERATURE SENSOR switch to NORMAL.
5.2.5. CONDUCTIVITY CELL CHECK
Step 1. Install pick-up tube and cell drain tube as follows:
a) Connect suitable length of 9.4 mm (.37 in) ID plastic tube to CELL
DRAIN spigot.
b) Arrange tubing so as to drain into waste container, ensuring cell drain
arrangement complies with the following important specifications:
i. Ensure cell drain tube remains isolated from possible electrical
ground paths.
NOTE: If the CELL DRAIN tube provides an electrical leakage
path to ground, large intermittent jumps in the display occur.
Even a plastic tube with a wet outer wall can cause this error.
Arrange the tube so the water discharges into a plastic container
(preferably located on the floor) and the tube does not touch the
container or its contents.
ii. Never allow CELL DRAIN tube to form traps or loops,
causing water to fill an entire cross-section of tube. The
resulting siphoning action may empty the conductivity cell.
iii. Never elevate CELL DRAIN tube above level of cell. Water
in the tube may back up to the cell electrode arms, flooding the
flushing manifold.
c) Attach one piece of 1.6 mm (.065 in) ID tubing to metal tube protruding
from rubber stopper at sample bottle holder location, cutting tubing so it
can reach but not touch bottom of sample bottle.
Step 2. Select a bottle of saline water (any salinity from 5 to 40 PSU) and thoroughly,
but gently, agitate to eliminate gradients.
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