wtw PB 150 Operating instructions

ba74107e03 03/01

Sampler

PB 150

Operating manual

Sampler PB 150

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. This may

result in differences between this operating manual and your instru-

ment. 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.

Password The default password is: 6299

Copyright

Reprinting - even as excerpts - is only allowed with the explicit written

authorization of WTW GmbH & Co. KG, Weilheim.

Printed in Germany.

List of contents

3

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.2 Components of the sampler . . . . . . . . . . . . . . . . . . . . . . . 8

1.2.1 Operation unit . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.2.2 Dosage unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.2.3 Rotary distributor . . . . . . . . . . . . . . . . . . . . . . . 12

1.2.4 Membrane pump . . . . . . . . . . . . . . . . . . . . . . . 12

1.2.5 Valve system . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.3 Course of sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.4 Sampling modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.4.1 Sampling according to time . . . . . . . . . . . . . . . 15

1.4.2 Sampling according to flow . . . . . . . . . . . . . . . 16

1.4.3 Sampling according to events . . . . . . . . . . . . . 17

1.4.4 Combined sampling . . . . . . . . . . . . . . . . . . . . . 17

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 20

3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4 Principle operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.2 Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5 Programming the automatic sampling . . . . . . . . . . . . . 31

5.1 Determining the nominal values . . . . . . . . . . . . . . . . . . . 31

5.1.1 Tasks and requirements . . . . . . . . . . . . . . . . . 32

5.1.2 Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.1.3 Number of samples per bottle . . . . . . . . . . . . . 34

5.1.4 Dosing volume . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.1.5 Sampling pause . . . . . . . . . . . . . . . . . . . . . . . . 36

5.2 Sample programming . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.2.1 Tasks and requirements . . . . . . . . . . . . . . . . . 37

5.2.2 Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.2.3 Inputs in the menu of the sampler . . . . . . . . . . 38

5.3 Programming the sampling . . . . . . . . . . . . . . . . . . . . . . 39

5.3.1 Selecting the program . . . . . . . . . . . . . . . . . . . 39

5.3.2 Setting a program . . . . . . . . . . . . . . . . . . . . . . 40

5.3.3 Sampling according to time . . . . . . . . . . . . . . . 40

5.3.4 Sampling according to flow . . . . . . . . . . . . . . . 41

5.3.5 Sampling according to events . . . . . . . . . . . . . 43

5.3.6 Finishing the program . . . . . . . . . . . . . . . . . . . 44

List of contents

4

6 Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.1 Single sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.2 Automatic sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

6.3 During the automatic sampling . . . . . . . . . . . . . . . . . . . . 54

7 Service menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7.1 Calling up the service menu . . . . . . . . . . . . . . . . . . . . . . 59

7.2 Operating individual components . . . . . . . . . . . . . . . . . . 60

7.2.1 Manually operating the membrane pump . . . . 60

7.2.2 Manually operating the pinching valve . . . . . . . 61

7.2.3 Manually operating the valve system . . . . . . . . 62

7.3 Displaying the info memory and input signals . . . . . . . . 63

7.3.1 Displaying the input signals . . . . . . . . . . . . . . . 63

7.3.2 Info memory . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

7.4 System settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

7.4.1 Entering the password . . . . . . . . . . . . . . . . . . . 66

7.4.2 Prepurging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

7.4.3 Postpurging . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

7.4.4 Aeration time . . . . . . . . . . . . . . . . . . . . . . . . . . 69

7.4.5 Maximum suction time . . . . . . . . . . . . . . . . . . . 70

7.4.6 Pinching valve open . . . . . . . . . . . . . . . . . . . . . 71

7.4.7 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

7.4.8 Pinching valve pause . . . . . . . . . . . . . . . . . . . . 73

7.4.9 Pump speed . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

7.4.10 Pinching valve power . . . . . . . . . . . . . . . . . . . . 75

7.4.11 Valve system power . . . . . . . . . . . . . . . . . . . . . 76

7.4.12 Pulse duration . . . . . . . . . . . . . . . . . . . . . . . . . 77

7.4.13 Changing the password . . . . . . . . . . . . . . . . . . 78

8 Cleaning, maintenance, disposal . . . . . . . . . . . . . . . . . 79

8.1 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

8.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

8.2.1 General information . . . . . . . . . . . . . . . . . . . . . 80

8.2.2 Replacing the dosage tube . . . . . . . . . . . . . . . 80

8.2.3 Replacing the pump . . . . . . . . . . . . . . . . . . . . . 81

8.2.4 Replacing the fuses . . . . . . . . . . . . . . . . . . . . . 81

8.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

9 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9.1 Error messages in the display . . . . . . . . . . . . . . . . . . . . 83

9.2 Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

10 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

11 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

11.1 Menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

List of contents

5

11.1.1 Main menu level . . . . . . . . . . . . . . . . . . . . . . . 91

11.1.2 Changing the program . . . . . . . . . . . . . . . . . . . 92

11.1.3 Program start . . . . . . . . . . . . . . . . . . . . . . . . . . 94

11.1.4 Manual operation . . . . . . . . . . . . . . . . . . . . . . . 94

11.1.5 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

11.1.6 Service menu . . . . . . . . . . . . . . . . . . . . . . . . . 95

11.2 Default settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

11.3 Circuit diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

11.4 Dimensions of stationary sampler, PB 150 . . . . . . . . . 101

11.5 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

11.6 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

12 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

List of contents

6

Overview

7

1Overview

The PB 150 sampler is a compact, stationary sampler for outdoor use.

The PB 150 sampler facilitates simple and reliable sampling from liquid

media according to time, flow and events. The sample volume can be

set in a range of 20 to 350 ml.

Sampling is performed pneumatically using a membrane pump (pres-

sure/vacuum) to a suction depth of approx. 7 m (from the dosage

vessel).

The sample is dosed into the sample bottles via a distributor.

Note

Information on accessories is given in the WTW catalog, O

NLINE

I

NSTRUMENTATION, or via the Internet.

Overview

8

1.1 Scope of delivery

l Sampler PB 150

l Sample bottles with closing cap (number depends on the model)

l 5 m suction hose

l Hose end piece

l Operating manual

1.2 Components of the sampler

1 Operation unit with operation field

2 Rotary distributor

3 Dosage unit

4 Door of the control unit compartment

5 Sample bottles

6 Door of the sample compartment

1

3

2

5

4

6

Overview

9

1.2.1 Operation unit

Operation field At the operation field you make all the important settings and start the

sampling.

The display shows the current state of the sampler. It also informs you

about the current settings.

Using the keys you operate the sampler.

1 Display

2 Keypad

1

2

Overview

10

Connections

Note

The RS 232 interface to connect the sampler to a PC can be connected

to the circuit board or to external plug-in connectors, according to

requirements.

1 Terminal box with

armored thread joints

Ground cable

Mains connection (shockproof socket)

Signal connector

1

}

Overview

11

1.2.2 Dosage unit

The dosage unit is in the upper part of the sampler next to the operation

unit.

1 Hose connector of the dosage tube

2 Air connection

3 Fixing screw for the dosage tube

4 Sealing

5 Packing ring

6 Coupling ring

7 Electrodes

8 Dosage tube

9 Duran 50 dosing glass

10 Silicone drain tube

11 Motive squeezing valve

Overview

12

1.2.3 Rotary distributor

The sample bottles (2) stand in a carrying tub (3) in the lower part of the

sampler. The bottles are filled via the distributor (1).

The distributor (1) is driven by a motor with pulser. A fork light barrier

controls the positions.

When the next sample bottle is to be filled, the sampler always runs via

position 1 first.

1.2.4 Membrane pump

The membrane pump to create pressure or vacuum is located within

the operation unit.

The membrane pump used has proved its worth in samplers for many

years and has a high efficiency (min. suction height 6.0 m).

1 Distributor plate with rotary distributor

2 Sample bottles

3 Carrying tub for sample bottles

1

3

2

Overview

13

1.2.5 Valve system

The motive valve system is especially safe in operation, maintenance

free and wear resisting. None of its components touches the sample

medium (water / waste water).

1 Exit to the pump, vacuum

2 Squeezing rolls

3 Exit to the dosage unit

4 Exit to the pump, pressure

5 Exit to the air filter

1

4

2

3

5

Pressure

twist direction

Vacuum

twist direction

Overview

14

1.3 Course of sampling

Sampling is performed in the following steps.

1 Blowing free the dosage unit and suction hose:

The squeezing valve closes the sample outlet.

The membrane pump creates pressure and pumps air into the

dosing glass. By this, the sample left in the connected suction

hose is displaced and the suction hose is cleaned.

2 Taking in sample:

The valve system switches to vacuum. The vacuum in the

dosage vessel created by the membrane pump leads to a

suction effect at the suction hose connected.

The dosing glass is filled with sample.

As soon as the sample reaches the electrodes (conductive fill-

ing level measurement via the conductivity of the medium), the

membrane pump is switched off.

3 Adjusting the sample volume:

The valve system switches to pressure. The membrane pump

creates a pressure in the dosage vessel. This pressure

displaces the superfluous sample from the dosing glass. The

sample quantity is adjusted to the height of the dosage tube.

The sample left in the connected suction hose is displaced and

the suction hose is cleaned.

4 Bottling the sample:

After the specified ventilation time the squeezing valve opens

and the sample flows off into a sample bottle.

zu zu zu auf

Druck DruckVakuum

Leitung

freiblasen

Freies

Ablaufen

Probe ansaugen

bis Kontakt

Leitung freiblasen,

Probe abdosieren

Probe

abfüllen

Overview

15

1.4 Sampling modes

A sample to be analyzed must be representative for the sampling loca-

tion and the conditions prevailing there.

Using the different modes of the PB 150, you can adjust the sampling

to the local conditions.

The following sampling modes are possible:

l Sampling according to time

l Sampling according to flow

– with analog flow signal

– with digital flow signal

l Sampling according to events

(example: if the measured value is above or below the limit value, a

signal is transmitted to the sampler)

l Combined sampling:

according to time or flow and according to events

1.4.1 Sampling according to time

Samples are taken at regular intervals, e. g. every 10 minutes. The

dosing volume of the individual samples remains the same.

Example: Setting in the menu:

Time interval: 10 min

Filling of the sample bottles: 2 hours

Result:

Each sample bottle is filled with the specified dosing

volume 12 times within 2 hours.

Overview

16

1.4.2 Sampling according to flow

Note

For the sampling according to flow, a flow quantity counter is required

additionally.

The sampling according to flow can be performed using an analog or a

digital flow signal.

Analog

flow signal

The number of samplings per time unit depends on the flow signal. The

number of samplings in case of the maximum analog flow signal (0-20

mA) is fixed.

The dosing volume of the individual samples remains the same.

In case of maximum flow, an analog flow counter sends the maximum

flow signal (e. g. 20 mA).

Digital

flow signal

The number of samplings per time unit depends on the flow signal. The

number of samplings in case of the maximum analog flow signal (puls-

es/time unit) is fixed.

The dosing volume of the individual samples remains the same.

In case of maximum flow, a digital flow counter sends e. g. 1000 pulses

per hour (setting at the flow counter).

analog

signal

the frequency of the sampling corresponds to the

strength of current that occurs

digital

signal

the frequency of the sampling corresponds to the

number of flow pulses per time unit

Example: Setting in the menu:

Flow signal: analog 0-20 or 4-20 mA

Maximum number of samples per hour: 40

Result:

With a flow signal of 20 mA, 40 samples per hour are

taken.

With a flow signal of 20 mA, 10 samples per hour are

taken.

Example: Setting in the menu:

Flow signal: digital

Pulse divider: 25

Result:

With 1000 pulses per hour, 40 (= 1000:25) samples are

taken.

With 500 pulses per hour, 20 (= 500:25) samples are

taken.

Overview

17

1.4.3 Sampling according to events

Note

For sampling according to events a measuring instrument (e. g. a pH

meter) is required additionally. During a defined event (e. g. when the

measured value is above or below the limit value) this measuring

instrument sends a signal to the sampler.

If the sampler is set to sampling according to events, samples are only

taken when the sampler receives an event signal.

While the event signals are being received, samples are taken at regu-

lar intervals. The dosing volume of the individual samples remains the

same.

1.4.4 Combined sampling

Example: Combined sampling guarantees a minimum sample quantity

during a sampling according to flow.

Note

For the combined sampling according to flow and events, a flow

counter and a measuring instrument (e. g. a pH meter) are required

additionally. During a defined event (e. g. when the measured value is

above or below the limit value) this measuring instrument sends a

signal to the sampler.

Example: Setting in the menu:

Event interval: 3 min

Result:

During an event, a sample is taken every 3 minutes.

When the criterion for the event is no longer met, the

measuring instrument sends no more signals to the

sampler. Sampling according to events is finished.

Example: Setting in the menu:

Flow signal: digital

Maximum number of samples per hour: 20

Event interval: 2 min

Result:

Up to 20 samples per hour are taken.

If an event occurs (example: a measured value is below

a limit value), the bottle is automatically changed. During

an event, samples are taken every 2 minutes. If the

measuring instrument sends no more signals to the

sampler, the bottle is changed and the sampling accord-

ing to flow is active again.

Overview

18

Safety

19

2 Safety

This operating manual contains basic instructions that you must follow

during the commissioning, operation and maintenance of the sampler.

Consequently, all responsible personnel must read this operating

manual before working with the sampler.

The operating manual must always be available within the vicinity of the

sampler.

Safety instructions In the individual chapters of this operating manual, the following safety

instructions indicate different danger levels:

Warning

indicates notes that have to be exactly observed to avoid possibly great

danger for people.

Caution

indicates notes that have to be exactly observed to avoid possible slight

injuries or damage to your instrument or the environment.

Further notes

Note

indicates notes that draw your attention to special features.

Note

indicates cross-references to other documents (e. g. operating manu-

als).

2.1 Authorized use

The sampler is authorized exclusively for taking liquid, aqueous

samples in an environment that is not potentially explosive.

The technical specifications as given in chapter 10 T

ECHNICAL DATA

must be observed.

Only the operation and running of the sampler according to the instruc-

tions given in this operating manual is authorized.

Any other use is considered unauthorized.

Safety

20

2.2 General safety instructions

The sampler has been built and tested according to the EN 61010 safe-

ty regulations. It left the factory in a safe and secure technical condition.

Function and operating

safety

The smooth functioning and operational safety of the sampler can only

be guaranteed if the generally applicable safety measures and the

specific safety instructions in this operating manual are followed during

operation.

The smooth functioning and operational safety of the sampler can only

be guaranteed under the environmental and electrical operating condi-

tions that are in specified in chapter 10 T

ECHNICAL DATA.

If the sampler was transported from a cold environment to a warm envi-

ronment, the formation of condensate can lead to the faulty functioning

of the sampler. In this event, wait until the temperature of the sampler

reaches room temperature before putting the sampler into operation.

Warning

If the sampler is used in areas that are biologically or chemically

contaminated, there is danger to health. In this case, observe the regu-

lations for handling dangerous substances when doing repair or main-

tenance work.

The operating unit of the sampler must only be opened by specialist

personnel authorized by WTW.

Dangers in case of

noncompliance with the

safety instructions

Noncompliance with the safety instructions can endanger the operating

personnel and the environment and the sampler as well.

Noncompliance with the safety instructions leads to the loss of any

warranty claims.

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wtw PB 150 Operating instructions

wtw PB 150 Operating instructions

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