32
33
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Troubleshooting
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2.
Cleaning
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For cleaning use only a soft cloth
E44395_Power meter_PT_IM_PRINT.indd 32-33
gap between the course of current and voltage,
i.e. the current follows the course of the cur-so
the voltage or vice versa.W
ith the phase angle φ
gets then the relationship between the effective
power, reactive power and apparent power.The
reactive power ensures that a coilor an electric
motor generates a field magnéti-co. The energy
of the reactive power is initially stored in the
magnetic field, but with each periodic magnetic
field reduction back to be sent to the network.
So, for the power we have then the following
formula, taking into account the actual values
U
e I:
p = U * I * cosφ – U * I * cos(2ωt+φ)
The expression contains a sum independent
of time, the active power P
= U * I * cosφ,
A summation with temporal dual frequency
and amplitude S = U * I,
a variant whose average sum is zero.
The size S is called apparent power.
Indications not common in the visu-screen
Demoralization
If the display screen presents information not
common or if it does not react to touch the
buttons there should be an initiation device.
Remove the appliance.
Remove batteries briefly and then return to
place them as shown on page 33.
Caution:
When removing the batteries, all
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have to be re-introduced later.
Danger of electric shock!
Always turn off the meter of the current cost of
electricity when cleaning it.
The system can not be washed or submerged in
liquid-Gido.