Edwards ELD500 Series

D135-10-880C - Safety
Page 2
Failure to observe the following precautions could result in damage to the pump.
 Unauthorized opening or modifications of the mechanical or electrical components of
the leak detector void the warranty.
 The leak detector must only be opened by such persons who have been authorised by
Edwards.
 The leak detector can be damaged when using the wrong voltage. The voltage must be
in the range 230 V (+/- 5%) or 115 V (+/- 5%) depending on the leak detector version.
Make sure that the mains voltage rating on the ELD500 coincides with the locally
available mains voltage.
 When the ELD500 is running in closed rooms the exhaust has to be put out of doors so
that the oil vapour can not be breathed in.
 Ensure a sufficient air cooling. The air inlet as well the air discharge openings must
never be obstructed.
 The ELD500 is designed for indoor use only.
 Operate the ELD500 only in the permitted temperature range between +10 °C and
+40 °C.
 Only synthetic oil (L31001) must be used in the wet pump.
Pumping condensible gases and steams: When pumping test sample water vapour that is
inside the test object can attain to the fore-pump. With the water vapour that is in the air -
especially in humid areas or when using humid or wet test samples - the acceptable
compatibility of water vapour or capacity of water vapour respectively can be exceeded.
The steam in the oil of the pump condenses when the water vapour rises over the acceptable
value. So the attribute of the oil changes and danger of corrosion occurs for the pump.
While using the leak detector with condensible gases and steams the oil of the fore-pump has
to be controlled regularly. So condensation of water vapour in the pump can be recognized.
Usually the oil is light and lucent. When water vapour is inside it gets blear and milky at
operating state temperature.
When turning the pump off water vapour condensates and raises the part of water in the oil.
The leak detector must not directly be switched off after the process, in which condensible
gases or steams are pumped, is finished. It must be running (at least 20 minutes) with opened
gas ballast valve until the oil of the pump is freed from detached steam.
When not taking care of this instruction there can be a corrosion within the pump, which will
not be covered by our warranty.
The height of the oil of the pump has to be controlled regularly.
The normal intervals of changing the oil from the producer have to be taken care of. See
instructions of the rotary vane pump.