running machine - H-P-COSMOS Sports and Medical
running machine - H-P-COSMOS Sports and Medical
running machine - H-P-COSMOS Sports and Medical
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[10.E] Voltage at the device housing / electric shock<br />
[10.E1] Open (interrupted) earth wire / ground<br />
file: n:\article\cos14310m5-v1_06hpc-en\20120215_cos14310m5-v1.06hpc-en_manual_h-p-cosmos_<strong>running</strong>_<strong>machine</strong>.doc<br />
© 2012 h/p/cosmos sports & medical gmbh email@h-p-cosmos.com created 15.02.2012 printed 15.02.2012 page: 145 of 213<br />
trouble shooting<br />
In case the earth wire (ground) is not connected (for example due to defect in the building installation), on the<br />
metal frame of the device a voltage will be life via the „Y-noise-suppression-capacity“. This characteristic is very<br />
common with almost all electrical equipment with metal housing <strong>and</strong> EMC-fault clearance filters. The earth wire<br />
<strong>and</strong>/or contactor at the wall socket [1] in the building or at any other part of the AC-power line/feeder is open [2]. In<br />
this case a voltage of approximately 110 volt runs via the capacitor, of the EMC-fault clearance filter (to be found in<br />
the device) between housing <strong>and</strong> earth. Via the capacitors of the incorporated EMC-filters a voltage [5] of approx.<br />
110 volts AC is live between frame [3] <strong>and</strong> grounding [4], e.g. via the floor or heating radiator system or other<br />
grounded parts or <strong>machine</strong>s.<br />
a) If the device is flawless (at device category sports = without Potential-Isolation-Transformer) the current flow<br />
is significant noticeable in case of touching any bare metal parts (for example screws).<br />
b) If the device is flawless (at device category medical = with Potential-Isolation-Transformer) the current flow is<br />
almost not noticeable in case of touching any bare metal parts (for example screws).<br />
c) If the device is defective (at device category sports <strong>and</strong> also medical), e.g. because of a defective isolation<br />
inside the device, the current flow may be life-threatening high in case of touching any bare metal parts (for<br />
example screws).<br />
Take the device out of operation immediately, unplug it <strong>and</strong> secure it against new start-up.<br />
Order an authorised electrician to repair the contactor circuit in the building or/<strong>and</strong> at the<br />
device.<br />
Read <strong>and</strong> follow the directives <strong>and</strong> information concerning check of ground-wire terminals <strong>and</strong> functions in the<br />
chapters installation, maintenance <strong>and</strong> safety checks of this operation <strong>and</strong> service manual.<br />
[10.F] Malfunctions of the heart rate measurement system POLAR<br />
Possible sources of interference:<br />
N Screens, computer, printer, mobile phones <strong>and</strong> any radio engineering system<br />
N Electric devices, electric motors, transformer<br />
N High-voltage transmission lines, also from trains<br />
N Strong fluorescent tubes near by<br />
N Central heating radiators<br />
N Other electric devices