Operating Instructions

5Operating Instructions VisiFerm
™
mA Sensors
SAFETY PRECAUTIONS AND HAZARDSGENERAL 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 environ-
ment). 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.
If the sensor is used in contact with gaseous or liquid organic
solvents, the resulting measurement accuracy in this application
must be separately checked and validated by the customer.
ATTENTION! The VisiFerm mA sensor has a built-in
temperature sensor (NTC 22k). This temperature
sensor is to be used only for monitoring the sensor
conditions, not for controlling the process temperature.
ATTENTION! The measurement values transmitted
over wireless communication are not intended to be
used for process control.
ATTENTION! The VisiFerm mA sensor can only be
autoclaved with the corresponding autoclavation cap.
1.2 About this Operating Instruction
These Operating Instructions are designed to support the
integration, operation and qualification of the VisiFerm mA sensors.
To achieve this, it will describe the features of VisiFerm mA and its
integration in Process Control Systems (PCS). Both the hardware
and the communication between the VisiFerm mA and Process
Control Systems are detailed in this manual. After reading this
manual the user should be capable of installing and operating
VisiFerm mA sensors.
ATTENTION! Essential information for avoiding
personal injury or damage to equipment.
NOTE: Important instructions or interesting information.
2 Liability
The liability of Hamilton Bonaduz AG is detailed in the document
«General Terms and Conditions of Sale and Delivery».
Hamilton is expressly not liable for direct or indirect losses arising
from use of the sensors. It must in particular be insured in this con-
junction that malfunctions can occur on account of the inherently
limited useful life of sensors contingent upon their relevant applica-
tions. The user is responsible for the calibration, maintenance and
regular replacement of the sensors. In the case of critical sensor ap-
plications, Hamilton recommends using back-up measuring points
in order to avoid consequential damages. The user is responsible
for taking suitable precautions in the event of a sensor failure.
NOTE: The VisiFerm mA sensor is not intended and
specified as a safety device. A SIL (Safety Integrity Level)
certification is not available. It is in the sole responsibility
of the user to validate the VisiFerm mA sensor according
the safety requirements of his application.
3 Safety Precautions and
Hazards
ATTENTION! Read the following safety instruc-
tions carefully before installing and operating the
VisiFerm mA sensor.
3.1 General Precautions
For safe and correct use of VisiFerm mA, it is essential that both
operating and service personnel follow generally accepted safety
procedures as well as the safety instructions given in this docu-
ment, the VisiFerm mA operating instructions.
The specification given in the «Specification Sheet» as regards
temperature, pressure etc. may under no circumstances be ex-
ceeded. Inappropriate use or misuse can be dangerous.
The lifetime of the VisiFerm mA highly depends on the specific
conditions of the application. Temperature, pressure, chemicals
used may accelerate the ageing of both the sensor and its ODO
cap. See chapter 7 for maintenance.
Cleaning, assembly and maintenance should be performed by per-
sonnel trained in such work. Before removing the sensor from the
measuring setup, always make sure that no process medium can
be accidentally spilled. When removing and cleaning the sensor, it
is recommended to wear safety goggles and protective gloves.
The sensor can not be repaired by the operator and has to be
sent back to Hamilton for inspection.
Necessary precautions should be taken when transporting the
sensors. For repair or shipment the sensor should be sent back
in the original reusable packaging box. Every VisiFerm mA sent
back for repair must be decontaminated.
If the conditions described in these operating instructions are not
adhered to or if there is any inappropriate interference with the
equipment, all of our manufacturer’s warranties become obsolete.
3.2 Operation of VisiFerm mA Sensor
When using the VisiFerm mA sensors in process environment
suitable protective clothing, safety glasses and protective gloves
must be worn, particularly when dealing with a malfunction where