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7-2 Operation Test of Leakage Breaker
Using the failed leakage breaker may cause
electrical shocks because of short-circuit.
Operational test should be made once
a month or more.
Operational test of the earth leakage
breaker should be made.
Insert the power plug and press the test button
of the earth leakage breaker with the leakage breaker
is on. It is acceptable when it turns off by the operation
of the breaker.
Test Button
4. Replacement of Vacuum Hose
Refer to “Setting of the vacuum pump ” in 5-1.
Preparation for Operation
7-3 Replacement of Fuse
Before replacing the fuse, turn off the Power switch
(Earth Leakage Breaker) for safety.
(1) Insert a thin slotted screwdriver into the groove on the top
of the holder. Fuse can be removed with the holder.
(2) Insert an applicable fuse rated for specified capacity.
Its capacity is carved on the body of the fuse.
The fuse on the market is also available.
Optional fuse is tabulated on the left.
* If any unspecified fuse is used, it may not be blown
when the overcurrent is flown. This failure may result in fire.
* If the replaced fuse blows again, stop the operation
immediately. And inspect the optional devices.
Parts Name
Code No.
Fuse 3.15 A
147670
Fuse Holder Body
Fuse Holder Body
Fuse
(
3.15 A
)
Pow
e r
On
Off
Main Body (Left face)
CAUTION
7-4 Control of Vacuum Pump Oil
Oil conditions largely depend on ultimate pressure and the
lifespan of the pump. Therefore, to maintain the performance
of pump, check the oil level and contamination viewing from
the oil gauge window, and replace the oil earlier.
If the water entered into the pump, halt the operation for a
while. And discharge the water from the pump drain.
By doing this, to a certain degree, vacuum performance is
improved, and operation period of time can be prolonged.
MIN
MAX
*Oil level should be
within the specified
amount
Standard interval period for oil replacement is 250 operation
hours.
However, replace the oil earlier for the following cases.
Where oil level reaches almost maximum due to the
water or specimen flows into the vacuum pump.
●
Oil becomes cloudy or pale in brown
●
Where insufficient vacuum is caused by oil
*
Caution
Operating continuously under MAX level might cause
the damage of vacuum pump.