Thank you for buying this InPro® 7000-VP Series 2-electrode conductivity
sensor from METTLER TOLEDO. InPro 7000-VP Series 2-electrode conductivity sensors are intended to be used to measure conductivity in low
(high purity water) to medium conductivity water. The sensors are available in a wide selection of process connections to meet every application
need.
Markings
The printed markings on each InPro 7000-VP Series 2-electrode conductivity
sensor contain the following information:
Mettler Toledo Sensor manufacturer
InPro 700X-VP Type of sensor
Cell M: XXXXXX Cell constant
Temp M: XXXXXX Temperature constant
Serial No: XXXXXXXXX Serial number
Ex-classification II I/2 G Ex ia IIC T3/T4/T5/T6 Ga/Gb
(metallic sensors / metallic sensors with
plastic surface)
Examination certificate number: SEV 14 ATEX 0129 X
Notified body: Electrosuisse SEV, (No.: 1258)
1.2 Equipment and scope of delivery
Scope of delivery
The InPro 7000-VP Series sensors are delivered ready for use. Each sen-
sor is accompanied by this instruction manual, an individual «Certificate
of Quality», CE Declaration of Conformity Certificate and a Material Certificate
following EN 10204 (exceptions: InPro 7000-VP and InPro 7005-VP).
Other Certificates may be included as specified for the individual product.
Please check that the details given in the Certificate of Quality match the
sensor label. For each sensor, the relevant cell constant has been determined individually in an ultrapure water system at 25 °C (77 °F) during the
manufacturing process, and the value documented in the accompanying
«Certificate of Quality».It is not necessary to re-calibrate the sensor be fore
initial operation.
Packaging
The packaging consists of cardboard and plastic material.
Keep the packaging for later use during storage or transportation of the
sensor. Should you wish to dispose of the packaging material, please
observe your local regulations as well as those data and instructions given
in Chapter 5.3 of this manual.
Unpacking and inspection
Please check the sensors immediately during unpacking in order to deter-
mine possible damage or missing items. Any irregularities should immediately be reported to your carrier and to your supplier.
For each sensor, the cell constant and temperature constant have been
measure / established individually and the values documented in the accompanying Quality Certificate. All calibrations can be traced back to NIST
and / or ASTM Standards.
Both the measuring range and the system measurement accuracy strongly
depend upon which type of transmitter is employed.
The wetted material parts of the sensor (several different materials come
into contact with the sample medium) can under some circumstance be
incompatible with the particular composition of the process medium and/or
of the operating conditions. Responsibility to verify application compatibil ity
lies wholly with the user.
The compatibility of different types of material are outlined on
http://www.coleparmer.com/techinfo/chemcomp.asp.
Mettler-Toledo GmbH, Process Analytics accepts no responsibility whatso-
ever for the correctness or accuracy of such details.
METTLER TOLEDO InPro 7000-VP Series sensors are intended solely for
the precise measurement of conductivity in aqueous and some limited
non- aqueous solutions in industrial applications.
Any other use, or any operation over and above that intended by the
manufacturer, are not recommended and can lead to harm or injury to
material / equipment and persons. This is also relevant for applications
which do not comply with the technical data labeled on the sensor. For any
damage arising from such misuse, the user assumes full and sole
responsibility.
2.3 Safety measures
The InPro 7000-VP Series sensors have been manufactured in line with
state-of-the-art technology and in accordance with accepted technical
safety regulations. Nevertheless, the sensors can still represent a source
of risk and danger:
– if the sensors are operated by insufficiently trained personnel,
– if the sensors are employed incorrectly or not as intended by the
manufacturer,
– if the sensors are not regularly maintained or serviced.
Local legislation and regulations must be observed at all times. Such
stipulations do not form an integral part of this instruction manual.
It is necessary to use protective gear, including gloves, for persons coming
in contact with the fluid. It is recommended to use gloves when handling
the electrodes of the sensor to limit contamination of the sensor.
The user is responsible for the instruction and training of personnel. Addi-
tional copies of the instruction manual can be ordered from your supplier.
This instruction manual is an essential element of the sensor equipment
and must at all times be readily available to operators directly at the mea-
surement site.
Before the sensor is removed from the process/process adapter, it must be
ensured that the process pressure has been reduced to a safe level and the
process temperature lowered to a safe range. Any escape of hot process
fluid under pressure can cause damage to material/equipment or injury to
No modification whatsoever may be carried out on the sensors. Any
unauthorized modification or manipulation of the sensors results in immediate expiration of the full scope of warranty granted by the manufacturer.
2.4 Use in Ex-zones
Note!For intended installation in an Ex-classified area, please observe the fol-
lowing guidelines:
Ex- classification: II 1/2 G Ex ia IIB T3/T4/T5/T6 Ga/Gb (plastic sensors)
II 1/2 G Ex ia IIC T3/T4/T5/T6 Ga/Gb (metallic sensors/metallic
sensors with plastic surface)
Marking and number of the test certificate:SEV 14 ATEX 0129 X
Introduction
1. The conductivity sensors made of plastic are according to Directive
94/9/EC (ATEX 95) Annex I equipment group II, category 1/2G after
RL 99/92/EC (ATEX 137) in the zones 0/1 or 0/2 or 1/2 and the gas
groups IIA and IIB, explosion hazards due to flammable substances
in the field of temperature classes T1 to T6, may be used.
2. The conductivity sensors made of metal or metal coated with plastic
to Directive 94/9/EC (ATEX 95) Annex I to equipment group II, category 1/2G after RL 99/92/EC (ATEX 137) in zones 0/1 or 0/2 or 1/2
and gas groups IIA, IIB and IIC, explosion hazards due to flammable
substances in the field of temperature classes T1 to T6, may be used.
3. For use/installation, the requirements according to EN 60079-14
must be observed.
4. The metal body of the conductivity sensors or the safety weld-in socket
or the fitting InFit 76*-*** or InTrac 7**-*** or other appropriate fitting
must be electrically connected to the equipotential bonding system.
5. The metal body of the conductivity sensors or the safety weld-in socket or
the fitting InFit 76*-*** or InTrac 7**-*** or other appropriate fitting is
optionally included in the routine pressure test of the system.
3 Initial start-up
3.1 Installation
The sensors are to be mounted in such a way that the sample medium
flows directly into the sensor through the orifice at the tip and re-emerges
through the vent holes. Any other installation position of the sensors can
create the risk of formation of airlocks, or of contamination through deposits of solid matter.
Flow direction
Flow
direction
Orientation in fluids
with low velocity
Vent hole
Sensor
T-piece
Flow of sample medium must be toward the face of the sensor. Air bubbles
and solid matter deposits are to be avoided. A minimum clearance of 0.6
cm (1/4") between sensor and pipe wall must be maintained at the tip of
the sensor.
Vertical mounting (top entry) in a pipe is recommended only if the pipe is
full and no air bubbles are able to develop in the flow.
In the event of side mounting (side entry) of the sensor, vertical upward
All of the InPro 7000-VP Series sensors can be connected to the asso ciated
transmitter using the appropriate multiwire cable from METTLER TOLEDO.
Depending on which type of transmitter is employed, not all cable strands
may have to be used.
Colors and function of the cable strands (supplied separately)
Connection to the relative transmitter must be followed according to the
wiring diagram below.
2-electrode sensorColor
Inner electrodewhite
Outer electrodewhite / blue
RTDgreen
RTD sensered
RTD / GNDBare shield
Connection to the relative transmitter must be followed according to the
wiring diagram (see respective transmitter instruction manual for detail).
METTLER TOLEDO supplies the cables. Please refer to chaper 7 “Accesso-
METTLER TOLEDO guarantees the quality of materials and workmanship
within a narrow range of manufacturing tolerances, so that the product
purchased is free from any substantial deviations from material and
manufacturing quality standards. The warranty is valid for a period of
one year from date of delivery: If within this warranty period, any repair or
replacement should become necessary, and such cause is not due to
misuse or incorrect application, please return the sensor, freight pre-paid,
to your appropriate METTLER TOLEDO supplier. Repair work will be carried out free of charge. Final decision on whether the defect is due to a
manufacturing error or to incorrect operation of the sensor by the customer
is made at the option of the Customer Service department of METTLER
TOLEDO. After expiration of the warranty period, sensors will be repaired
or replaced on an exchange basis against payment of the costs involved.
4.2 Maintenance
Dirty or contaminated sensors can deliver incorrect measurement values.
If fouling is presumed, the sensor is to be removed from operation and the
electrodes as well as the insulation between the electrodes cleaned with
a soft cloth. Suitable cleaning solutions are mild detergents or diluted
acids (< 0.5 % by wt.) such as nitric acid. Never use clean ing agents that
are not compatible with the material to be cleaned.
When handling acids, precautionary measures are to be taken.The sensor must be thoroughly flushed with distilled or deionized water
prior to re-installation.
Following cleaning and re-installation into the process, it can take from
several minutes up to several hours until the sensor delivers the originally