5
7.
OPERATION
CAUTION
EXERCISE CARE WHEN USING ACIDIC OR
CAUSTIC SOLUTIONS AS THEY WILL ATTACK
THE GALVANIZED STEEL BATH BODY IF SPILLED
INTO THE BATH. IF SPILLS DO OCCUR, THE BATH
LIQUID SHOULD BE IMMEDIATELY DRAINED AND
THE UNIT THOROUGHLY FLUSHED. SPILLS AND
C O N D E N S A T I O N S H O U L D B E C L E A N E D /
REMOVED FROM ALL METAL SURFACES AFTER
EACH USE.
WARNING
EXPLOSION, IMPLOSION OR THE RELEASE OF
TOXIC OR FLAMMABLE GASES RISING FROM
M A T E R I A L B E I N G H E A T E D I S T H E S O L E
RESPONSIBILITY OF THE USER.
7.01
When filling the bath with water, allowance
must be made for the displacement of water
upon immersion of samples. The maximum
liquid level should be 1 inch below the top of the
pan.
Do not use deionized water.
7.02
To conserve energy, reduce evaporation
and increase temperature control accuracy, use
the gable cover provided. Do not use aluminum
foil as a cover; as it may cause corrosion due to
an electrochemical reaction.
1. Add distilled water to bath. Position the
temperature probe tip 4 1/2" from the top
edge of pan. Adjust O-ring if necessary.
Probe must always be immersed in the pan
during operation. Water level should be at
least 1-1/2 inches above the top pump outlet
for adequate water circulation. The water
level should be approximately 1 to 1 1/2
inches from the top of the bath when the bath
is fully loaded.
2. Power up: Depress the power switch lo-
cated at the lower left hand corner of the
bath. The unit is fully operational upon appli-
cation of power and the display will read
actual bath temperature.
3. To Select the Operating Temperature:
Model 2860 has four user selectable
temperature setpoints of 35.0, 41.5, 44.5
and 45.5°C. To select the desired operating
temperature, press the
V
or down
W
button
until the desired temperature is displayed.
Press Enter button to accept the new setpoint.
The display will flash, indicating that the new
setting has been entered. When the flashing
stops, the display returns to actual bath
temperature.
4. To Calibrate:
a. Calibration should be performed to match
a stable bath's actual temp display to a
calibrated thermometer.
b. Press CALIBRATE button once. Display
flashes to indicate Calibrate mode.
c. Press
V
or
W
button until the display
matches the readout on a certified ther-
mometer. Press ENTER to set new value.
d. If ENTER is not pressed, the new value will
not be set and display will return to the
previously displayed temperature.
e. Display should now match your calibrated
thermometer. The unit will stabilize
automatically to the set temperature.
Periodic Safety Check
Test the operation of the Hi-Limit thermostat, as
follows, every three months.
1. Locate the Hi-Limit thermostat adjustment
to the right of the power switch.
2. When delivered, the thermostat adjustment
is turned fully clockwise. In this position,
the Hi-limit light is OFF.
3. After the bath temperature has stabilized,
use a standard, flatblade screwdriver to
adjust the thermostat.
4. Turn the thermostat adjustment counter-
clockwise until the Hi-limit light is ON.
5. Then turn the thermostat adjustment
clockwise 1/8 of a turn at a time, until the
Hi-limit light goes OFF.
At this setting, if the bath temp increases
above the selected setting, the Hi-limit
activates.
