wtw pH 5000 User manual

ba75752e01 08/2008
Trinkwassertafel
Drinking water panel
21
Betriebsanleitung
Operating instructions
Modular single parameter measuring systems

Accuracy when
going to press
The use of advanced technology and the high quality standard of our
instruments are the result of a continuous development. Consequently,
this may result in some differences between this operating manual and
your instrument. Also, we cannot guarantee that there are absolutely
no errors in this manual. Therefore, we are sure you will understand
that we cannot accept any legal claims resulting from the data, figures
or descriptions.
Note
The latest version of the present operating manual can be found on the
Internet at www.WTW.com.
Copyright ©Weilheim 2008, WTW GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of WTW GmbH, Weilheim.
Printed in Germany.

Trinkwassertafel Contents
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Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.1 User qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.2 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2.3 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 28
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.1 Installation prerequisites . . . . . . . . . . . . . . . . . . . . . . . . 31
3.2 Wall mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3 Connecting the voltage supply . . . . . . . . . . . . . . . . . . . . 33
3.4 Connecting the inlet and outlet . . . . . . . . . . . . . . . . . . . . 33
3.5 Installation of the sensors . . . . . . . . . . . . . . . . . . . . . . . 34
3.6 Wiring of the sample flow monitor (option) . . . . . . . . . . . 34
3.7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4 Maintenance and cleaning . . . . . . . . . . . . . . . . . . . . . . 37
4.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6 Accessories, maintenance equipment and replacement
parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.1 pH 5000 (pH/ORP) drinking water panel . . . . . . . . . . . . 41
6.2 Oxi 4000 (oxygen) drinking water panel . . . . . . . . . . . . . 41
6.3 LF 6000 (conductivity) drinking water panel . . . . . . . . . . 42
6.4 CL 7010 (chlorine) drinking water panel . . . . . . . . . . . . 42
6.5 General replacement and accessory parts . . . . . . . . . . 42

Contents Trinkwassertafel
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Trinkwassertafel Overview
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1Overview
Structure
Fig. 1-1 Overview of drinking water panel (example)
A mounted drinking water panel that is ready for operation consists -
depending on the order - of the following main components (Fig. 1-1):
zReady-mounted baseplate with:
– monitor, designed for the measured parameter (pos. 1)
– flow-through vessel, version depends on the measured
parameter (pos. 2)
– pressure regulator (pos. 3)
– throttle valve (pos. 4)
– pipe system (pos. 5)
– sample flow monitoring (option, pos. 6)
zsensor, depends on the measured parameter and measuring range
(pos. 7)
zsensor connection cable, depends on the sensor (pos. 8)

Overview Trinkwassertafel
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Trinkwassertafel Safety instructions
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2 Safety instructions
This chapter contains essential instructions that must be followed
during the commissioning, operation and maintenance of the drinking
water panel. Thus, it is essential for the operator to read this component
operating manual before carrying out any work with the system.
Some components (monitor, sensor) are delivered with their own
operating manual. It is also important to heed the SAFETY chapter in this
manual. Keep the collected operating manuals available close to the
drinking water panel where possible.
General safety
instructions
Safety instructions in this operating manual are indicated by the
warning symbol (triangle) in the left column. The signal word (e.g.
"Caution") indicates the danger level:
Warning
indicates instructions that must be followed precisely in order to
prevent serious danger to personnel.
Caution
indicates instructions that must be followed precisely in order to
avoid slight injury to personnel or damage to the instrument or the
environment.
Other labels
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. component
operating manuals.
2.1 User qualification
Target group The drinking water panel was developed for online analysis. Some
maintenance activities, such as changing the electrolyte in specific
sensors, require the safe handling of chemicals. Thus, we assume that
the maintenance personnel is familiar with the necessary precautions
to take when dealing with chemicals as a result of their professional
training and experience.

Safety instructions Trinkwassertafel
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Special user
qualifications
The following installation activities may only be performed by a
qualified electrician:
zConnecting the drinking water panel to the supply line (see
operating manual of the monitor).
zConnection of external, line voltage-carrying circuits to relay
contacts (see operating manual of the monitor).
2.2 Authorized use
The authorized use of the drinking water panel consists only of its use
in the analysis of drinking water, swimming pool water and similar
media.
Please observe the technical specifications according to chapter 5
TECHNICAL DATA. Only operation and running according to the
instructions in this component operating manual is authorized.
Any other use is considered to be unauthorized. Unauthorized use
invalidates any claims with regard to the guarantee.
2.3 General safety instructions
The monitor of the drinking water panel is constructed and inspected in
accordance with the relevant guidelines and norms for electronic
instruments (see chapter TECHNICAL DATA in the monitor operating
manual). It left the factory in a safe and secure technical condition.
Function and
operational safety
The fault-free functioning and operational safety of the drinking water
panel are only guaranteed if the generally applicable safety measures
and the special safety instructions in this operating manual are followed
during its use.
The fault-free functioning and operational safety of the components
are only guaranteed under the environmental conditions that are
specified in chapter 5 TECHNICAL DATA.

Trinkwassertafel Safety instructions
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Safe operation If safe operation is no longer possible, the drinking water panel must be
taken out of operation and secured against inadvertent operation.
Safe operation is no longer possible if components:
zhave been damaged in transport
zhave been stored under adverse conditions for a prolonged period
of time
zare visibly damaged
zno longer operate as described in this manual.
If you are in any doubt, contact the supplier of your drinking water
panel.
Obligations of the
operator
The operator of the drinking water panel must ensure that all relevant
regulations are followed when dealing with chemicals such as:
zEEC directives for protective labor legislation
zNational protective labor legislation
zAccident prevention regulations

Safety instructions Trinkwassertafel
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Trinkwassertafel Installation
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3 Installation
3.1 Installation prerequisites
Requirements of the
measurement location
The drinking water panel is intended for mounting on a flat, vertical wall.
The measurement location must meet the environmental conditions
specified in chapter 5 TECHNICAL DATA. Make sure there is good
accessibility for maintenance and setting work.
The following facilities are assumed on the operator side at the site:
z230 or 115 V AC power supply with interrupt facility (for details, see
operating manual of the monitor)
zSample intake line DN 10 or hose line 1/2" (requisite sample flow,
see chapter 5 TECHNICAL DATA)
zSample outlet dimensioned for open channel drain according to the
sample flow.

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3.2 Wall mounting
The base plate has four holes at the corners for attaching to a wall.
Make sure the wall has the necessary stability for the weight of the
drinking water panel. Only use mounting material which is suitable for
the wall material (screws, dowels, etc.). The spacings of the drilled
holes are indicated in the following figure:
Fig. 3-1 Drilled hole distance for the drinking water panel (dimensions in mm)
Note
Make sure that there is sufficient space under the drinking water panel
for connecting the sample inlet and outlet and that the display of the
monitor is easy to access and read.
310 mm
20 mm
20 mm20 mm
20 mm
20 mm20 mm
20 mm20 mm
1060 mm
Diameter of the drilled
holes 8.5 mm
Clearance of the rear side
to the wall 20 mm. Use the
spacer bolts provided for
this.

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3.3 Connecting the voltage supply
The monitor of the drinking water panel is supplied with mains voltage.
The mains voltage must comply with the specifications given on the
nameplate and in the operating manual of the monitor. The power line
and all lines to current outputs and relays can be laid via the two
openings at the back of the base plate.
Note
The connection of the voltage supply is described in detail in the
operating manual of the monitor.
3.4 Connecting the inlet and outlet
The connection of the inlet and outlet line can be carried out in two
ways:
zConnection via hoses (inside diameter 1/2") via the mounted hose
connection pieces. Secure the hose connections with the aid of the
hose clamps provided.
zRigid pipe union via the couplings (diameter DN 10) after removing
the hose connections.
Note
For reasons of safety we recommend the installation of a stopcock
before the sample inlet in order to be able to quickly interrupt the
sample flow if necessary.
Caution
The outlet of the drinking water panel may only be connected to
an open channel flow that is virtually pressureless. A water
column of max. 0.5 m relating to the lid of the flow through
armature may be applied. Check the tightness of your
connections after the installation.

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3.5 Installation of the sensors
Note
Heed the instructions for installation in the sensor operating manual.
Installation in the
drinking water panel
3.6 Wiring of the sample flow monitor (option)
The sample flow monitor consists of a switch (flow control) that closes
when the flow-through reaches a specific level. The switching threshold
is typically 30 l/h. By wiring up the contacts of the flow control with the
analog output of measured values of the monitor (current output in the
REC operating mode) the flow-through can be monitored and recorded.
1Install the sensor in the flow-through vessel. Depending on the
type, the sensor is screwed into the installation opening up to
the stop or plugged in and then fixed with a coupling ring.
2 If necessary, connect the plug of the connection cable with the
sensor and the free cable ends with the terminal strip of the
monitor (see operating manual of the monitor).
3The two openings in the base plate enable the cable to be
stowed between the rear wall and base plate.

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Wiring diagram
Fig. 3-2 Wiring diagram for the sample flow monitoring
Note
Set the current range of the output ideally between 4 and 20 mA in
order to reliably detect any decrease in sample flow to below the
switching threshold even at low measured values.

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3.7 Commissioning
To commission the drinking water panel, proceed as follows:
Adjusting the sample
flow
Set the sample flow to at least approx. 30 l/h (corresponds to
0.5 l/min). A higher sample flow has no negative effect on the
measurement.
Change the sample flow via the pressure setting on the pressure
reducer or the position of the throttle valve. The 180° fine scaling of the
throttle valve enables a fine setting. The sample flow can be measured,
for example, by volumetric measurement of an amount of water
collected within a specific time at the sample outlet (bucket and stop
watch).
The through-connection threshold of the sample flow monitoring
(option) is typically 30 l/h. Increase the sample flow if necessary until
the flow control connects reliably through.
Caution
Check the tightness of the pipe systems after the commissioning
(visual control). Pay attention to traces of escaping water at the
joints while doing so.
Note
Heed any warm-up period for specific sensors (see operating manual
of the sensor).
1Switch on the supply voltage for the monitor and wait until the
monitor has started up.
2 Make the necessary settings on the monitor (see operating
manual of the monitor).
3Open the sample inlet and adjust the sample flow (for values,
see chapter 5 TECHNICAL DATA).

Trinkwassertafel Maintenance and cleaning
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4 Maintenance and cleaning
4.1 Maintenance
Maintenance activities
4.2 Cleaning
Panel and components Clean the wall mounting panel, tubes and component surfaces by
wiping them with a moist cloth.
Tubes, inside cleaning Basically, it is not necessary to clean the insides of the tubes. If
required, the pipe system can be cleaned as follows:
Note
For cleaning, remove the sensors from the flow-through vessel and,
where necessary, clean them according to the instructions in the
respective sensor operating manual.
Component Maintenance
Pipe system Regularly check all joints for
traces of escaping water (visual
control)
Monitor (see monitor operating manual)
Sensors Depending on the sensor type
(see sensor operating manual)
Other components See component operating manual
Contamination Cleaning agents Implementation
Lime and hydroxide
coatings
Acetic acid (10 %) – Close the inlet
and outlet
– Pour cleaning
agent into the
flow-through
vessel from above
and leave to take
effect
– Subsequently
rinse thoroughly
with water.

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Algae, biofilm Water and household
washing-up liquid
– Dismantle pipe
system
– Clean innner
surfaces with
brush/cloth and
washing-up liquid
– Subsequently
rinse thoroughly
with water
(carefully remove
any residues of
washing-up
liquid!).
Contamination Cleaning agents Implementation

Trinkwassertafel Technical data
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5 Technical data
Wall mounting panel
Mounting Through four drillings in the panel, diameter 8.5 mm, drilled hole
diagram, see Fig. 3-1.
Ambient conditions
Note
The drinking water panel is designed for operation in closed rooms and
is not suitable for outdoor installation.
Permissible
overpressure
Required sample flow 10 ... 70 l/h (depending on the sensor)
Sample flow monitoring,
flow control (option)
Through-connection threshold: approx. 30 l/h (0.5 l/min)
Medium overflow Into open channel flow, virtually pressureless. A water column of max.
0.5 m relating to the lid of the flow through armature may be applied.
Power supply Depending on version ordered (depending on the monitor)
Application range Drinking water and swimming pool water
Connections for inlet
and outlet
Can be realized as hose line (hose diameter 1/2") or rigid pipe union
(DN 10).
Dimensions (H x W x D) Approx. 1100 x 350 x 13 mm
Clearance to the wall 20 mm via rear
spacer bolts on the plate
Material PVC rigid foam, spumed, white
Temperature
Operation 0 °C ... + 40 °C
Storage 0 °C ... + 40 °C
Before pressure
regulator (inlet)
0 ... 10 bar
After pressure regulator 0 ... 6 bar

Technical data Trinkwassertafel
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