6. Check that the amber lamp does not illuminate during the control
mode. If it does the Limit Control is set too close to the Temperature
Control. Start back at Step 1 to reset the Limit Control.
Note
The amber limit lamp has no power to illuminate when the
temperature control is not calling for heat (green lamp off). The green
lamp goes off when the amber lamp is on.
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Please be advised that stainless steel can and will rust if not regularly
cleaned and properly maintained.
It is recommended that the bath be
cleaned at least on a monthly basis for moderate to heavy-use installations.
Follow these steps to empty and clean the unit after using it.
Note
While cleaning the chamber, be careful not to bend the temperature
control capillary tube which is located along the bottom of the bath
chamber.
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1. Turn off power, unplug the unit, and allow to cool completely.
2. If you have a water bath of 2 or 5 liter capacity, pour the liquid from
the unit into an appropriate disposal container.
3. If you have a larger size water bath, allow the unit to cool and pump
or siphon to empty the unit into an appropriate disposal container.
4. Remove the diffuser tray from the bottom of the bath chamber.
5. Clean the inside of the water bath with mild detergent (such as Joy
dishwashing detergent) and warm water. Do not scrub any surface
with steel wool. (Steel wool leaves small metal particles behind that
will rust, causing the pan to look rusty). In instances where a heavy
coating of residue has accumulated inside the tank or where there is
evidence that corrosion is beginning, the use of a stainless steel cleaner
(such as 3M Stainless Steel Cleaner and Polish) is recommended.
6. Rinse and wipe all tank surfaces with distilled water. The bath is now
ready for use.
Note
If Alarm Light comes on during normal cycling, turn backup
controller knob slightly clockwise and monitor. (If backup and digital
controls overlap, the bath will have a wider temperature control band.)
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Isotemp Economy Water Bath
5-3
Fisher Scientific
Section 5
Operation
Emptying and
Cleaning the Unit
Procedure 2
(continued))