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TetraCon 700

Measuring / Operation

29

ba55320e05

11/2009

4.2

Application-dependent settings

The TetraCon 700 conductivity measuring cell is long-term stable. The 
conductivity measuring cell is immediately ready for operation for its 
authorized use in water/wastewater applications.

Adapting the cell

constant to the

installation location

In the case of special installation conditions, it may be necessary to 
adapt the cell constant (due to the influence of the measuring 
environment, e.g. of boundary fields).

In chapter 6 W

HAT

 

TO

 

DO

 

IF

 ... of this operating manual you will find the 

correct values to set for some products of the WTW accessory program 
that require a correction of the cell constant (if it is possible to give fixed 
values at all). If necessary, special installation recommendations for the 
TetraCon 700 can be found in the accessory operating manual. 

Note
Details on how to determine and set the cell constant can be taken from 
the operating manual of the measuring transmitter.

Summary of Contents for TetraCon 700

Page 1: ...ba55320e05 11 2009 TetraCon 700 Operating manual Conductivity measuring cell...

Page 2: ...est version of the present operating manual can be found on the Internet under www WTW com Copyright Weilheim 2009 WTW GmbH Reprinting even as excerpts is only allowed with the explicit written author...

Page 3: ...ral safety instructions 25 3 Commissioning 27 3 1 Scope of delivery 27 3 2 Installation 27 3 2 1 Connection to the measuring transmitter 27 4 Measuring Operation 28 4 1 Measuring 28 4 2 Application de...

Page 4: ...ructure of the TetraCon 700 conductivity measuring cell Fig 1 1 Structure of the TetraCon 700 conductivity measuring cell 1 Shaft 2 Closing head with protective ring 3 Voltage electrodes 4 Temperature...

Page 5: ...ces from primary or secondary polarization effects which ensures a high degree of measuring accuracy The modern epoxy casting technique reduces the danger of breaking the conductivity measuring cell i...

Page 6: ...y instructions in this operating manual can be recognized by the warning symbol triangle in the left column The signal word e g Caution indicates the danger level Warning indicates instructions that m...

Page 7: ...ecure technical condition The smooth functioning and operational safety of the conductivity measuring cell can only be guaranteed if the generally applicable safety measures and the specific safety in...

Page 8: ...es as described in this manual If you are in any doubt contact the supplier of your conductivity measuring cell Obligations of the operator The operator of the conductivity measuring cell must ensure...

Page 9: ...ection to the measuring transmitter The TetraCon 700 connection cable has a cable plug to be connected to the Cond input socket of a measuring transmitter It is connected to the terminal strip of a me...

Page 10: ...ation If the clearance is less than that the cell constant changes This leads to inexact measurement results Normally measuring transmitters have a correction function that can compensate for this inf...

Page 11: ...e necessary to adapt the cell constant due to the influence of the measuring environment e g of boundary fields In chapter 6 WHAT TO DO IF of this operating manual you will find the correct values to...

Page 12: ...curacy Therefore we recommend cleaning the conductivity measuring cell regularly according to visual checks Especially before measuring low conductivity values we recommend to clean the measuring cell...

Page 13: ...ng cell Boundary fields not observed At the electrodes the conduc tivity measuring cell must be surrounded by a clearance of at least 5 cm at the base and sides Otherwise the cell con stant will chang...

Page 14: ...and accessories TetraCon 700 32 ba55320e05 11 2009 7 Replacement parts and accessories Adapter Note Information on further accessories is given in the WTW catalog and on the Internet Model Order no AD...

Page 15: ...ter 40 mm approx 660 g without sensor connection cable Sensor head PVC epoxy filling material Electrodes housing of the temperature sensor Graphite Shaft Stainless steel 1 4571 Closing head POM Protec...

Page 16: ...1 Wiring diagram Pin assignment 7 pole screw plug Shield Thermistor NTC Thermistor NTC Current electrode I1 ring Voltage electrode U1 Voltage electrode U2 Current electrode I2 ring 6 1 2 3 5 7 4 NTC 3...

Page 17: ...23 EC pressure equipment directive 8 4 Characteristic data on delivery Temperature measurement Cell constant Measuring medium 0 C 50 C Storage transport 5 C 65 C storage in air recommended Max admissi...

Page 18: ......

Page 19: ...buildings factories and farms In more than 150 countries we have strong long standing relationships with customers who know us for our powerful combination of leading product brands and applications...

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