VisiFerm mA Sensors ™ Operating Instructions
TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents 1 General Information...................................................4 7 1.1 Intended Use.................................................................4 1.2 About this Operating Instruction....................................4 2 Liability........................................................................4 3 Safety Precautions and Hazards..............................5 3.1 General Precautions.........................................
General Information 1 General Information 1.1 Intended Use The VisiFerm mA sensors are intended for the measurement of dissolved oxygen (DO) and oxygen in gas phase (dust environment). The VisiFerm mA sensor is certified for use in explosive atmosphere. If these sensors are used in explosive atmospheres, the instructions in the chapter 3.3 must be followed.
Safety Precautions and Hazards the risk of contamination from spilled liquids exists. Installation and maintenance of sensors must be performed only by trained personnel. The mobile devices and sensors must be used for their intended applications, and in optimum safety and operational conditions. Use only wired digital or analog connection for the process control. The Arc wireless interface is designed for sensor monitoring, maintenance and service purposes.
Safety Precautions and Hazards Safety Precautions and Hazards Hamilton recommends the following power supply units: Maximum input power Pi Process and Ambient Temperature range [Ta/p] 750 mW -20 °C < Ta/p < 115 °C T 135 °C If the sensor is electrically disconnected, the following temperature has to be observed for the process.
Safety Precautions and Hazards Option 2: Glass or plastic tank (not connected to earth) The glass or plastic tank has no connection to earth and therefore it is necessary to connect the sensor shaft via a screw clamp to earth. X Product Description ATTENTION! If the power supply (220 VAC/24VDC) is switched off or disconnected the reading on the PCS is wrong. 3.
Product Description Installation 4.2 Hardware Description 4.3 Optical DO measurement The VisiFerm mA sensor consists of a sensor head with integrated electronic and a sensor shaft in contact with the measured medium. The sensor shaft is terminated by the optical dissolved oxygen (ODO) cap, carrying the oxygen sensitive luminophore. During development, special attention was paid to an optimum sanitary design. The optical measurement principle is based on the so-called luminescence quenching.
Installation Installation 5.2 Configuring the VisiFerm mA with ArcAir Application VisiFerm mA sensors require application specific configuration. Following parts are required to configure and calibrate Arc sensors: • Arc View Mobile (Ref 243690) or ArcAir computer Software Solution. • External Power supply with Sensor Power Cable M12 (Ref 355288). ATTENTION! For automatic sensor login a unique and global Operator Level S password for all intelligent sensors is required.
Installation Parameter Name Description Pressure Humidity Measuring interval Installation Default Value Configuration Location The partial 1013 mbar Required, pressure of application oxygen is dependent proportional to the atmospheric pressure or the pressure of the air supply to the process Measurement/ Parameter The concen100% Must tration of dissolved oxygen in gas phase is dependent on the humidity Measurement/ Parameter Parameter Name Description The measuring 3 sec.
Installation Installation 5.2.8 Defining a measuring point name for identification of the process Parameter Name Value Measuring point Default Settings Location User can 10070760 Optional define a XXXXYYYY* sensor name for better identification of the measuring point Descriptions Information / Info Userspace * XXXX = Sensor Information (Chapter 10) YYYY = Sensor Serial Number 5.
Installation Operation The Device Description or DD can be downloaded on the HART Communication Foundation webpage www.hartcomm.org (search for Device Descriptions / DD Library) or on the Hamilton webpage www.hamiltoncompany.com.
Maintenance NOTE: No oxygen measurement is performed at a temperature higher than 85°C to protect the optoelectronics and enhanced the sensor lifetime. ATTENTION! Please scan the barcode or enter the data into ArcAir prior first use of a replacement cap. Maintenance No communication between the sensor and ArcAir. This may be due to a hardware failure. Figure 11: Description of the traffic lights on ArcAir 7.
Maintenance Maintenance 7.3.2 Calibration in Air (Calibration Point Air) 3) Select the sensor in the sensor list 4) Open the Calibration tab 1) Make sure temperature, humidity and pressure values are constant (Figure 13) 5) Select Zero Point calibration 2) Power the VisiFerm and connect to ArcAir via the Arc Wireless Converter BT 6) Immerse the sensor into an oxygen-free environment (Figure 13) for e.g. nitrogen. Verify that the flow rate does not exceed 0.
Maintenance Troubleshooting isopropyl alcohol immediately from the membrane with deionised water and gently wipe over the membrane 6) After cleaning always perform a new calibration before carrying out measurements. (See chapter 7.3 in the corresponding Operating Instruction Manual) Figure 15: Effect of a product calibration (CP6) on an existing standard calibration function based on the Zero Point Calibration (CP 1) and the Air Calibration (CIP 2).
Troubleshooting Disposal 8.2 Getting Technical Support Warning Cause / Solution Measurement not running The measurement interval is set to 0 or the measurement temperature is out of the range DO calibration recommended Perform a calibration in order to ensure reliable measurement (Chapter 7.3.1) DO last calibration not successful The last calibration failed. The sensor is using the old successful calibration values. In order to ensure reliable measurement perform a new calibration (Chapter 7.3.
Ordering Information Ordering Information NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Ordering Information Ordering Information 11.2 Parts and Accessories Ref Description 10068400 ODO Cap H3 Wetted Materials Stainless steel 1.4435 Silicone (FDA and USP Class VI) Application: For general application in biotechnology, water treatment and monitoring as well as in breweries and wineries. Ref Product Name 355288 Sensor Power Cable M12 Description: This cable includes a power adapter to supply the sensor with operation power.
Ordering Information Ordering Information 11.3 Arc Services Hamilton service engineers are available in Europe and China in order to provide customers with on-site services. Hamilton offers a wide range of services from technical support to initial operation, qualification and maintenance of the sensors. Various tailored services are offered especially for the BioPharma, ChemPharma and brewery industries. Experienced service engineers ensure an optimal and professional service.
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