Maintenance - Endress+Hauser Proservo NMS5 Operating Instructions Manual

8 Maintenance

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8 Maintenance
NMS5 measuring instrument requires no special maintenance.
Exterior Cleaning
When cleaning the exterior of measuring devices, always use cleaning agents which will not cause corrosion
or other damage to the housing surface seals.
Seals Replacement
NMS5 O-rings may need to be replaced periodically, and more frequently in extreme climates. The period
between changes will depend on climate severity, ambient temperatures and process.
Repairs
The Endress+Hauser repair policy is based on the fact that the measuring devices have a modular design and
that customers are able to undertake repairs themselves. Spare parts are contained in corresponding kits along
with their related replacement instructions. Endress+Hauser provides spare parts for repairs of NMS5, which
are located with their order numbers on later pages (refer to "10.6 Spare Parts"). Contact Endress+Hauser ser-
vice representatives for further assistance regarding service and spare parts.
Repairs to Ex-approved devices
When performing repairs on Ex-approved devices, note the following:
• Repairs of Ex-approved devices may only be performed by trained personnel or by Endress+Hauser Service.
• Comply with the prevailing standards, national Ex-area regulations, safety instructions (XA) and other
relevant rules.
• Only use original spare parts provided by Endress+Hauser.
• When ordering spare parts, note the device information on the nameplate. Replace parts only with parts that
have the same device information.
• Perform repairs according to the instructions. When completing repairs, perform the specified routine test
on the device.
• Only Endress+Hauser service representatives may convert a certified device into a different certified variant.
• Document all repair work and conversions.
Replacement
After replacing NMS5 or electronic module, the adjustment of a new sensor is required.
Proservo NMS5
Endress+Hauser