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3. PRE-OPERATION PROCEDURES
Installation Precautions
Air-dry unit completely after using low-temperature water.
When using cold water below room temperature, operate unit under the condition of room
temperature 20 ±5 °C, humidity 60 % RH. After operating with low-temperature water,
condensations may have formed inside unit. Leave unit in a well-ventilated place until it
dries completely to prevent the possibility of electrical leakage.
Safety Functions
Independent
1
overheat prevention
(fixed temperature)
Automatic overheat
2
prevention
Temperature upper
3
limit error
(E06)
Overcurrent
4
protection fuse
* If overheat prevention device activation and temperature upper limit error frequently occurs, contact
original dealer of purchase for inspection.
* Main function of overheat prevention function and temperature upper limit is to keep this unit from
overheating, NOT to protect test samples from damage. Likewise, it is NOT intended for protection
against accident or injury resulting from the negligent use of explosives and flammables.
Unit has a separate overheat prevention device, independent of the CPU
board for added safety. However, this is not designed to prevent empty
heating. Do not run unit without sufficient amount of fluid.
Bath reservoir is hot when the device is activated. Turn OFF (○) the
Power switch and disconnect power cable. Avoid touching the reservoir
until it cools.
See "Independent Overheat Prevention Device Reset" (P.21) for
procedure for resetting overheat prevention device.
This function shuts off heater circuit when temperature reading exceeds
set temperature to a certain degree. (Operation continues)
This function shuts off heater circuit when temperature reading exceeds
maximum operating temperature.
Activation temperature: approx. 105 °C (BM312-G)
approx. 220 °C (BO312-G)
Bath reservoir is hot when the device is activated. Turn OFF (○) the
Power switch and disconnect power cable. Avoid touching the reservoir
until it cools. Wait until the temperature of the reservoir falls below 60°C,
then turn the Power switch back ON (|). Unit will restart.
Unit is equipped with overcurrent protection fuse on the rear. The fuse
blows when overcurrent occurs during operation.
Check the fuse if unit does not turn on by turning the Power switch ON (|)
while independent overheat prevention device is not activated. Replace
the fuse by referring to "Maintenance and Inspection" (P.25).
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