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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
© Weilheim 2000, WTW GmbH & Co. KG
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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