Memmert WNB 7 User manual

Waterbath
WNB 7 - 45
OPERATING INSTRUCTIONS

BASIC
page 2

BASIC
page 3
1 General notes and
safety notes
safety notes
You have purchased a technically fully proven product which has been produced in Germany with the
use of high-grade materials and the application of the latest manufacturing techniques; it has been
factory tested for many hours.
For this waterbath we guarantee spare parts to be available up to 10 years.
Observation of the Operating Instructions is necessary for faultless
Observation of the Operating Instructions is necessary for faultless
operation and for any possible claims under warranty. If these
operation and for any possible claims under warranty. If these
Instructions are disregarded, all claims under warranty, guarantee
Instructions are disregarded, all claims under warranty, guarantee
and indemnifi cation are excluded!
This mark on the product means:
Note Operating Instructions
Note Operating Instructions
Warning – bath hot when operating
Warning – bath hot when operating
The right to technical modifi cations is reserved.
Dimensional details are not binding.
1.1
Transport
Transport
Always use gloves!
If the units WNB 22 to 45 have to be carried, 2 persons are required.
Place the bath accurately horizontal and
Place the bath accurately horizontal and
not on an infl ammable support!
not on an infl ammable support!

BASIC
page 4
2
Technical data
Model
7
10
14
22
29
45
Volume [liter]
7
10
14
22
29
45
Usable bath length A [mm]
240
350
350
350
590
590
Usable bath width B [mm]
210
210
290
290
350
350
Usable bath depth C [mm]
140
140
140
220
140
220
Housing length D [mm]
468
578
578
578
818
818
Housing width E [mm]
356
356
436
436
516
516
Housing height (with fl at cover) F [mm]
238
238
238
296
238
296
Housing height (with gable cover) G [mm]
337
337
347
405
343
401
Weight [kg]
11
14
16
17
24
26
Current consume [A]
5,2
5,2
7,8
8,7
10,4
12,2
Power [W]
1200
1200
1800
2000
2400
2800
Ambient conditions
Ambient temperature 5ºC - 40°C
rh max. 80% (no condensation)
Overvoltage Category: II
Contamination degree: 2
Setting temperature range
10°C to 95°C
with activation of the
boiling mode up to 100°C, see
section 4.3.1
Setting accuracy
0,1°C
Indication accuracy
0,1°C
Working temperature range
5ºC above ambient temperature to
nominal temperature
= maximum temperature (see rating plate)

BASIC
page 5
2.1
Material quality
Material quality
Memmert is using stainless steel (
Mat.Ref. 1.4301) for the external casing as well as for the interior, an
outstanding material because of its high stability, optimum hygienic features and corrosion resistance
against many (not all!)
chemical combinations (Attention e.g. at chlorine combinations!).
The load has to be tested for its chemical compatibility with the materials mentioned above.
A material-compatibility table covering all these materials can be requested from MEMMERT.
WARNING! Always pull out the supply plug before
WARNING! Always pull out the supply plug before
opening the bath cover!
opening the bath cover!
2.2
Electrical equipment
Electrical equipment
•
Operating voltage see rating label, 50/60 Hz
•
Protection Class 1, i.e. operating isolation with ground connection to EN 61 010
•
Protection IP20 to DIN EN 60 529
•
Interference suppression to EN55011 Class B
•
Bath protected by a fuse 250V/15A fast blow
•
Controller protected by a 80 mA fuse (200 mA on 115 V)
•
When connecting a MEMMERT bath to the electrical supply you have to observe any local
regulations which apply (e.g. in Germany DIN VDE 0100 with FI protection circuit)
2.3 Note on EMC (
2.3 Note on EMC (
electromagnetic compatibility)
electromagnetic compatibility)
This product is intended to operate on a supply network with a system impedance Z
max
at the transfer
point (building connection) of 0.292 Ohm max. The user has to ensure that the product is only operated
on an electrical supply network which meets these requirements. If necessary, details of the system
impedance can be obtained from the local electricity supply authority.
Note:
Any work which involves opening up the bath must only be
Any work which involves opening up the bath must only be
carried out by a properly qualifi ed electrician!
carried out by a properly qualifi ed electrician!
2.4
Brief technical description
Brief technical description
MEMMERT-waterbaths are electrically heated and electronically controlled.
The temperature of the thermostating liquid is continuously controlled by a microprocessor-controller
with pulse package control. Electronic microprocessor-PID-controller with continuous power matching
and
autodiagnostic system with fault indicator (see section 12), integral timer for digital programme
time selection.
The temperature is
measured using a
Pt 100 temperature sensor (4-wire circuit). The accuracy is as
follows:
WNB
Setting accuracy
0,1ºC
Temperature fl uctuation
±0,1ºC
The components of temperature control are controlled by integrated malfunction-recognition. The
heaters are installed outside - therefore no problems through dirt or limeresidue.

BASIC
page 6
2.5
Standard equipment
Standard equipment
•
Electronic fuzzy-supported PID process controller with delayed programme start and
programmable hold time. The controller has permanent power matchinig and an
autodiagnostic system for rapid fault fi nding
•
Recessing push/turn control for simple operation of bath
•
Visual alarm indication
•
Mechanical temperature limiter (TB Class 1)
•
Monitor relay to switch off heating in case of fault
•
High-grade stainless-steel Pt100-temperature sensor (Mat.Ref. 1.4571) Class A in 4-wire circuit
•
Boiling mode for temperatures above 95°C
Special equipment (to be ordered separately as accessory): fl at cover with concentric ring sets, gable
cover to drain condensate, cooling device, various racks for test tubes, bottles etc
3
Installation
The unit must be placed on a
horizontal, non-flammable surface
which cannot tilt.
The vent openings in the left and back side
must
remain unobstructed. Minimum wall spacing on all
sides is 80 mm. The minimum spacing from the top of the bath to the next ceiling (rack, etc.) is 750 mm.
3.1
Initial start-up
Initial start-up
When the bath is started up for the fi rst time, it should be supervised continuously until steady conditions
have been reached.
3.2
Start-up - waterbath
Start-up - waterbath
Mains
connection The mains connection cable must be placed away from any hot surface.
space for
air circula-
tion
space for
air circula-
tion
min.
750mm
min.
80mm
min.
80mm

BASIC
page 7
Operation with non-fl ammable thermostating liquids only!
Operation with non-fl ammable thermostating liquids only!
drain valve
max water level
min water level
Note
•
The tray may suffer damage as a result of corrosion and pitting, causing the temperature control
fl uid to infi ltrate the heating system. Only ever use demineralised water with a conductance level of
5-10 microsiemens and a pH value between 5 and 7.
•
The tray may suffer damage if ultrapure water or DI water with an electrical conductance level
of below 5 microsiemens is used. Only ever use pretreated water with a conductance level of 5-10
microsiemens.
•
When fi lling the bath, make sure you stop when the
liquid level is between the two fi ll level
marks on the right inside wall of the tray. Water baths may have a
water level control feature (see
section 9).

BASIC
page 8
4
Bath construction and operation
Bath construction and operation
The
heating positioned on three sides around the tank ensures a natural
water circulation of the liquid
inside, thus securing an optimal
uniform temperature distribution.
4.1
Controls and
indications
relatively largest heat loss (since fur-
thest away from the heated ribs)
minimum heat loss (since
very close to the heated ribs)
bath
Insulation
heating elements
time-symbol
delay-symbol
(delayed switch-on)
hold-symbol
(hold time)
alarm-symbol
SET key
temperature display
heater-symbol
push/turn control
7 5. 0

BASIC
page 9
4.2
Switching on
Switching on
The bath is switched on by pressing the push/turn control
and can be operated in connection with
the SET-key.
Bath switched off: The push/turn control is
pushed in and protected against damage.
4.3 Setting the
4.3 Setting the
parameters
parameters
A parameter can be selected by rotating the push/turn control; all other parameters are then dimmed.
The selected parameter fl ashes brightly and can now be altered with the push/turn control while holding
down the SET key (protection against unintentional alteration).
If the push/turn control is rotated quickly the setpoint is altered in large steps; with slow operation it is
altered in single steps.
After the SET key has been released the newly set value is stored.
Further rotation of the push/turn control selects the next parameter.
Rotation of the push/turn control selects the following parameters (in the order indicated), to be altered
as described above:
1.
Temperature setpoint
2.
Delayed switch-on
3.
Hold time of the setpoint temperature

BASIC
page 10
4.3.1 Temperature setpoint
4.3.1 Temperature setpoint
The bath starts to heat up
immediately to the set temperature.
Adjustment range:
Adjustment range:
10
°C to
95
°C or ca.
100
°C with
activation of the boiling mode
Setting and indication accuracy:
Setting and indication accuracy:
0,1
°C
Rotate the push/turn control until the
°C
symbol fl ashes.
The
setpoint temperature can then be selected with the SET key depressed,
as described in section 4.3. After releasing the SET key the display briefl y
fl ashes the setpoint. The display then changes to the actual temperature and
the controller starts to control to the selected setpoint temperature.
During heating the
symbol fl ashes in proportion to the actual heater power.
In order to reach water temperatures above 95°C (boiling point), waterbaths
are provided with the boiling mode. If this is selected, the heating is switched
on permanently.
Activating the
boiling mode by rotating the push/turn control beyond the
maximum value until the display shows “
CCC
“
The setting “boiling mode“ is not stored permanently. After the bath is switched
off and on again, the controller shows again the previously selected setpoint.
°C
°C
4.3.2
Delayed switch-on
Delayed switch-on
The bath starts to heat up to the previously
selected temperature only after the time of
the switch-on delay has elapsed.
Adjustment range:
Adjustment range:
1
min bis
99.59
hrs
Setting accuracy:
Setting accuracy:
1
min
Indication accuracy:
Indication accuracy:
<10 hrs:
1
min
≥10 hrs:
1
hr
Rotate the push/turn control until the
(delay) and the
symbol fl ashes.
The duration of the delayed switch-on can then be set with the SET key
depressed as described in section 4.3. After the SET key has been released
the bath briefl y fl ashes the setting of the switch-on delay.
The delayed switch-on is then activated and the display alternates between
the actual temperature and the running time of the switch-on delay. The time
is shown with a negative sign and runs down. In this way it is possible to
determine at any time how much longer the bath waits until it begins to heat
up.
If no delayed switch-on is required, it can be de-activated by the setting “
OFF
“.
°C
°C
°C
ϑ
t
90°C
ϑ
t
delay 12h
90°C

BASIC
page 11
4.3.3
Hold time of the setpoint temperature
Hold time of the setpoint temperature
The bath switches off the heating after
the end of the selected hold time. In this
case the hold time includes the heating-
up time.
Adjustment range:
Adjustment range:
1
min bis
99.59
hrs
Setting accuracy:
Setting accuracy:
1
min
Indication accuracy:
Indication accuracy:
<10 hrs:
1
min
≥10 hrs:
1
hr
Rotate the push/turn control until the
(hold) and the
symbol fl ashes.
The duration of the hold time can then be selected with the SET key depressed,
as described in section 4.3. After the SET key has been released the bath
briefl y fl ashes the hold time setting.
If no hold time has been programmed, the hold time is activated immediately
and the display alternates between the actual temperature and the running
time of the hold time. As with switch-on delay, the residual time is shown with
a negative sign and runs down.
If no hold time is required, it can be de-activated by the setting “
OFF
“
°C
°C
°C
5
Programming example of a programme sequence
Programming example of a programme sequence
1. Setpoint temperature setting
1. Setpoint temperature setting
Rotate the push/turn control until the
°C
symbol fl ashes. With the SET key
depressed, use the push/turn control to set the temperature setpoint to f.ex.
90.0
°C.
°C
2. Delayed switch-on setting
2. Delayed switch-on setting
Rotate the push/turn control until the
(delay) and the
symbol fl ashes.
With the SET key depressed, use the push/turn control to set the time f.ex.
6.00
hours.
°C
3. Hold time setting
3. Hold time setting
Rotate the push/turn control until the
(hold) and the
symbol fl ashes. With
the SET key depressed, use the push/turn control to set the time f.ex.
4.00
hours.
°
C
ϑ
t
90°C
hold 6h

BASIC
page 12
6
Monitoring the programme sequence
Monitoring the programme sequence
Bath does not heat up
During the delayed switch-on the
symbol
fl ashes and the display alternates between
residual time and actual temperature
°C
°C
Bath heats up
After the end of the delayed switch-on the
symbol goes dark and the bath heats up to
the selected setpoint temperature. Heating is
indicated by the
symbol.
°C
Bath holds setpoint
temperature
During the hold time the
symbol fl ashes
and the display alternates between the
residual time and the actual temperature.
°C
°C
Heating is switched off
After the hold time has elapsed the
symbol
goes dark, the heating is switched off, and
the display alternates between the actual
temperature and “
end
“.
°C
°C
ϑ
t
90°C
hold 4h
delay 6h
ϑ
t
90°C
delay 6h
hold 4h
ϑ
t
90°C
hold 4h
delay 6h
ϑ
t
90°C
delay 6h
hold 4h

BASIC
page 13
7
Temperature
Temperature
monitor and protection devices
monitor and protection devices
7.1 Mechanical temperature monitor:
7.1 Mechanical temperature monitor:
temperature limiter
temperature limiter
All waterbaths are fi tted with a mechanical temperature limiter (TB)
Protection Class 1 to
DIN 12880
.
If the electronic control unit should fail during operation and the fi xed factory-set maximum temperature
is exceeded by approx. 30°C the temperature limiter switches off the heating permanently as a
fi nal
protective measure
protective measure
. The
symbol
lights up
lights up
continuously as warning.
7.2
Low-level protection
Low-level protection
In addition to its function as overtemperature protection the TB also operates as
low-level protection
low-level protection
,
i.e. the heating is switched off permanently if the liquid drops below a certain level. As a warning the
symbol
lights up
lights up
continuously.
Fault rectifi cation after the
TB cut-out has been activated:
1.
Switch off the bath and allow it to cool down
2.
Rectify the fault (e.g. top up the liquid, replace temperature probe) and where appropriate contact
customer service
3.
The bath is again ready for operation only after it has cooled down and after the fault has been
rectifi ed
7.3
Monitor relay
Monitor relay
In addition the bath is equipped with an electronic monitor relay.
If a fault occurs during operation or if the selected setpoint temperature is exceeded by 10°C, then the
monitor relay continues control of the heating at this temperature in emergency operation.
The
symbol
fl ashes
as warning.
Fault rectifi cation after the monitor relay may been activated:
Check the controller for error messages (see section 12) and where appropriate contact customer
service.
Example:
With a setpoint temperature of 80°C, if a fault occurs in the power unit (faulty triac) the bath continues
to operate in emergency operation at approx. 90°C.

BASIC
page 14
8 Use of the cover (special equipment)
8 Use of the cover (special equipment)
Gable
cover
The gable cover (may be ordered as already mounted special equipment) should always
be closed in order to prevent
evaporation of thermostating liquid and to obtain optimal
temperature distribution. The gable shape of the cover makes sure that condensed water
will not drop down into the loads.
Flat cover
For positioning of test fl asks on top of the bath, a fl at cover (special equipment) may be
used. The size of the holes in this cover can be adapted to the fl asks with ring inserts.
The rings may therefore only be inserted or taken off, if the bath is cooled down.
Note that during operation the fl at cover and the gable cover
Note that during operation the fl at cover and the gable cover
heat up to the temperature of the thermofl uid!
heat up to the temperature of the thermofl uid!
9
Level control (special equipment)
Level control (special equipment)
2 different fi lling levels can be maintained constant if the unit is fi tted with a level control system. When
using water as thermostating liquid, connect the feed pipe with tubing to the mains water supply. The
drain must be connected with tubing to an appropriate container or sink.
Make sure, that the tubing cannot be clogged or bended, and that it continually runs downhill.
Please note, that the outfl owing water may be hot!
Please note, that the outfl owing water may be hot!
Supply and drain are indentifi ed by arrows. Use temperature
resistant material for the tubing.
If the second overfl ow is not required, it must be closed with
a sealing cap.
The evaporation loss can be compensated through a
slightly open water supply (dripping) and can be monitored
through the “observation window“.
The level control system cannot be retrofi tted!
Warning – bath hot when operating
Warning – bath hot when operating
observation
window
supply
drain
drain

BASIC
page 15
10
Cooling system (special equipment)
Cooling system (special equipment)
If the waterbath is fi tted with a cooling device
for quicker cooling of the bath liquid, the “water
supply“ has to be connected by a
hose f.ex. to
a cold water supply line. The “discharge“ has
to be lead into a drain.
(Use temperature resistant material for the
tubing)
Please note, that the outfl owing water may be hot!
Please note, that the outfl owing water may be hot!
The discharge must be connected with tubing to an appropriate container or sink. Make sure, that the
tubing cannot be clogged or bended, and that it continually runs downhill.
11
Cleaning and
Cleaning and
maintenance
By regular cleaning of the easy to clean the tank, residues are
By regular cleaning of the easy to clean the tank, residues are
avoided which at continuous infl uence can impair the outfi t and
avoided which at continuous infl uence can impair the outfi t and
function of the waterbath.
Please use only detergents and antiliming agents appropriate for
Please use only detergents and antiliming agents appropriate for
stainless steel for the cleaning of the tank and the housing
stainless steel for the cleaning of the tank and the housing
(stainless
(stainless
steel detergents usual in the trade)!
steel detergents usual in the trade)!
steel detergents usual in the trade)!
steel detergents usual in the trade)!
steel detergents usual in the trade)!
After cleaning and after draining the water the
After cleaning and after draining the water the
stainless steel tank must be rinsed thoroughly with clear water
stainless steel tank must be rinsed thoroughly with clear water
and dried carefully!
and dried carefully!
and dried carefully!
and dried carefully!
and dried carefully!
water supply
discharge
It is important to ensure that no rusting objects come into contact with the stainless steel bath tank or
the stainless steel housing. Rust sediments lead to
contamination.
If
rust stains caused by contamination occur on the tank surface, the affected areas must be cleaned
and polished immediately.
On units with gable cover we recommend that the
hinge bolts are oiled from time to time if the bath is
used frequently.

BASIC
page 16
12
Check list
for
fault rectifi cation
In case of a malfunction contact an authorized service station for Memmert equipment or please inform
the Memmert service department (see section 16).
In case of queries always specify model and serial number (on the rating label).
13 Action on
supply failure
supply failure
After a failure of the supply, operation continues with the previously set parameters.
14
Glossary
Glossary
•
nominal temperature = themaximum adjustable
setpoint temperature of the bath.
•
ambient temperature = the continuous temperature of the room in which the bath is set up.
Main switch ON,
no indication on the display
Main fuse 15A or instrument fuse T80mA 250V~ on circuit board
55167.x has blown
Controller faulty
Electrical supply interrupted
symbol not alight
Ambient temperature too high
Temperature in bath above the selected setpoint temperaturer
symbol alight
Temperature protection (TB) has operated
Liquid level too low
symbol fl ashes
Monitoring relay has operated
C O N F
Error on self test
E - 1
Power module triac faulty
E - 2
Power module faulty
E - 3
Pt100-temperature probe faulty
E - L
Communication to power unit interrupted

BASIC
page 17
15
CE Conformity of Declaration
CE Conformity of Declaration
Modelljahr 2006 D10286 / 03.07.08
EC Declaration of Conformity
Manufacturer´s name and address: MEMMERT GmbH + Co. KG
Äußere Rittersbacher Straße 38
D-91126 Schwabach
Product: Waterbath
Type: WNB...
Sizes: 7 / 10 / 14 / 22 / 29 / 45
Nominal voltage: AC 230 V 50/60 Hz
alternative AC 115 V 50/60 Hz
The designated product is in conformity with the European EMC-Directive
2004/108/EEC
including amendments
Council Directive of 03 May 1989 on the approximation of the laws of the Member States relating to
electromagnetic compatibility.
Full compliance with the standards listed below proves the conformity of the designated product with the essential
protection requirements of the above-mentioned EC Directive:
DIN EN 61326:2004-05 EN 61326:1997
EN 61326/A1:1998
EN 61326/A2:2001
EN 61326/A2:2003
The designated product is in conformity with the European Low Voltage Directive
2006/95/EEC
including amendments
Council Directive on the approximation of the laws of the Member States relating to Electrical
equipment for use within certain voltage limits.
Full compliance with the standards listed below proves the conformity of the designated product with the essential
protection requirements of the above-mentioned EC Directive:
DIN EN 61 010-1 (VDE 0411 part 1):2002-08 EN 61 010-1:2001
DIN EN 61 010-2-010 (VDE 0411 part 2-010):2004-06 EN 61 010-2-010:2003
Schwabach, 03.07.08
______________________________
(Legally binding signature of the issuer)
This declaration certifies compliance with the above mentioned directives but does not include a property assurance. The
safety note given in the product documentation which are part of the supply, must be observed.

BASIC
page 18
Standard units are safety-approved and bear the test marks:
This product is subject to the Directive 2002/96/EC by the European
Parliament and the EU Council of Ministers which concerns Waste
Electrical and Electronic Equipment (WEEE). This product has been
put on the market after 13 August 2005 in countries which have already
incorporated this Directive into National Law. It should not be
disposed
off as part of domestic refuse. For disposal please contact your dealer or
the manufacturer. Products which are infected, infectious or contaminated
with health-endangering substances are excluded from return. Please note
also all further regulations in this context.
16
Address and
customer service
MEMMERT GmbH+Co.KG
PO Box 17 20
91107 Schwabach
Germany
Phone: [phone] / 925-0
Fax:: [phone]
E-mail: [email protected]
Internet: www.memmert.com
Customer service:
Phone: [phone] / 925-143
or 00 49 9122 / 925-126
E-mail: [email protected]
In case of queries always specify model and serial number (on the rating label).
© by MEMMERT GmbH+Co.KG

BASIC
page 19
17 Index
A
address 18
alarm symbol 13
ambient conditions 4
ambient temperature 16
autodiagnostic system 5, 16
B
bath construction 8
boiling mode 4
boiling mode, activate 10
brief technical description 5
C
CCC 10
CE conformity of declaration 17
check list for fault rectifi cation 16
chemical compatibility 5
cleaning 15
contaminations 7, 15
controls 8
cooling system 15
cover, fl at 14
cover, gable 14
customer service 18
D
deionised water 7
delayed switch-on 10
DIN 12880 13
disposal 18
draining 7
drain hose 14, 15
drain valve 7
E
electrical equipment 5
electromagnetic compatibility 5
evaporation loss 14
F
fault rectifi cation 16
fi lling 7
G
glossary 16
H
heating 8
hinge bolts 15
hold time of the setpoint temperature 11
I
indications 8
initial start-up 7
installation 6
L
level control system 7, 14
liquid level 7
low-level protection 13
M
maintenance 15
Mat.Ref. 1.4301 5
material quality 5
monitoring the programme sequence 12
monitor relay 13
monitor unit 13
N
nominal temperature 4, 16
P
parameter settings 9
polluted fl uids 7
programming example 11
Protection Class 1 13
Pt 100 temperature sensor 5
R
rust deposits 15
S
safety notes 3
setpoint temperature 16
setpoint temperature, selection 10
standard equipment 6
start-up 7
supply failure 16
switching on the bath 9
T
TB 13
technical data 4
temperature fl uctuation 5
temperature limiter (TB) 13
temperature measurement 5
temperature monitor 13
thermofl uid 7
transport 3
U
uniform temperature distribution 8
W
water circulation 8
working temperature range 4

Memmert GmbH + Co. KG | Postfach 1720 | D-91107 Schwabach | Tel. [phone] / 925 - 0 | Fax [phone] / 145 85 | E-Mail: [email protected] | www.memmert.com
15.06.2018
Waterbath BASIC englisch
D10329