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Model 2032 and 2036 Baths ______________________________________________________________Routine Maintenance
4.4 Overtemp Safety Thermostat and Temp Safety
Indicator Light
The overtemp safety thermostat should be set slightly
above the operating temperature of the bath. In the event of an
overtemp condition, the overtemp safety thermostat will:
1. Cause the safety control indicator to light.
2. Shut off power to the heaters and maintain the tempera-
ture at the overtemp control point.
The overtemp control is not directly calibrated. The num-
bers (0 to 10) on the dial are for reference only and do not cor-
respond to any specific temperature. When an overtemp condi-
tion occurs, the cause of the problem must be determined and
corrected before normal operation under the main temperature
controller can be resumed.
Refer to Section 3.7 for instructions in setting the overtemp
safety thermostat.
4.5 Mechanical Timer
The mechanical timer mounted on the control panel is
designed to notify the operator when the thawing time has
elapsed. The timer can be set for thirty minutes or less by turn-
ing the knob to the desired setting. For any time setting under
five minutes, the dial must be first turned past the 5 minute
mark, then reversed to the desired setting. A bell rings when the
time has elapsed. Refer to Section 3.10 for setting the timer.
Section 5 - Routine Maintenance
5.1 Cleaning the Bath
It is a safe practice to wear gloves and a breathing
mask whenever cleaning blood bank equipment.
Follow established laboratory procedures.
The bath should be given a thorough cleaning at least once
a month.
a. Exterior
Clean the outside of the bath with soap and water or with
any non-abrasive commercial spray cleaner. Disinfect the bath
interior with a general-use laboratory disinfectant, diluted
according to the manufacturer's instructions. Rinse the surface
thoroughly after each cleaning and wipe the surfaces dry.
Always rub in the direction of the finish polish lines.
Do not use chlorinated solvents on stainless steel
as they can cause rusting and pitting.
b. Interior
Clean the bath interior with a general purpose laboratory
disinfectant and rinse with water with a quality of 50K to 1M
Ohm.
Clean the bath as follows:
1. Disconnect the bath from the power supply and drain the
liquid from the tank.
2. Remove the two screws securing the top of the baffle
screen, and pull the screen out by the bottom. Clear any
solid debris from the bath, baffle screen and pump out-
let.
3. Refill the bath with water and a low concentration of
laboratory cleaner and disinfectant.
4. Connect the bath to the power source and run the bath
for 5 to 10 minutes.
5. Disconnect the bath from the power source and scrub
the bath interior and probes with a sponge or non-metal-
lic abrasive pad.
6. Clean the pump outlet with a bottle brush.
7. Drain the bath and rinse the interior and the pump.
8. Refill the bath and resume normal operation.
5 - 1
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