KROHNE ALTOSONIC III EN - Manual (Page 5)

Installation and operating instructions
5 ALTOSONIC III
1. Introduction
1.1 Cautions
For flowmeters supplied with a voltage over 50 V AC:
• Refer all maintenance or service to trained KROHNE service engineers.
• Mains power shall be disconnected from the product before performing any maintenance.
• This product is prepared for and can only function with the rated AC mains or DC supply voltage as indicated on
the type plate.
For 100 – 240 V AC supplied flowmeters:
• This product is a Class 1 device (earthed) and requires a correct connection to protective earth. The protective
earth conductor of the main power shall be properly connected to the marked protective earth terminal to ensure
safety from electric shock for the operator and its environment.
1.2 Unpacking and
inspection
• The product has been thoroughly inspected and tested before shipment and is ready for operation.
• After carefully unpacking, inspect for shipping damage before attempting to operate. If any indication of mechanical
damage is found, immediately contact the responsible transport service and your local KROHNE representative.
• A simple operating check of the electronics after unpacking and before permanent installation is advisable to
ascertain whether it has suffered damage during shipment.
• Confirm for the correct mains voltage printed on the type plate. If it differs from the ordered product please contact
your local KROHNE representative.
• After connecting to the mains, check if there is any indication on the display and if the backlight of the display is
lighted. If not, contact your local KROHNE representative.
1.3 System description The ALTOSONIC III ultrasonic flowmeter is a precision instrument designed for linear, bi-directional flow measurement
of liquids. Flow measurement values can be outputted via the standard analog and-or pulse/frequency outputs. Via a
user friendly operator interface (HMI) the flow can be read. Next to actual volumetric flow measurement the converter
can be configured to perform measurement and output of the liquid sonic velocity and acoustic signal attenuation.
1.4 Approvals
CE Approvals
EMC, Electromagnetic Compatibility Directive
EMC directive 89/336/EEC.
Low Voltage Directive
73/23/EEC and is designed in accordance with EN IEC 61010-1 first and second edition.
Pressure Equipment Directive 97/23/EC / Module H
The KROHNE organization complies with the requirements of Module H of the Pressure Equipment Directive 97/23/EC
(full quality assurance).
ATEX directive ATEX Directive 94/9/EC
Both the flow sensor and the flow converter are in compliance with the European Directive 94/9 EG (i.e. ATEX 100A).