Memmert ONE 7 - 45 User Manual

Operating instructiOns

Waterbath

WNE 7 - 45
WPE 45

Oilbath

ONE 7 - 45

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1 General notes and safety notes ............................................................................................................4

1.1 Transport .................................................................................................................................4

2 Technical data ..................................................................................................................................... 5

2.1 Material quality .......................................................................................................................6

2.2 Electrical equipment ................................................................................................................6

2.3 Note on EMC (electromagnetic compatibility) ...........................................................................6

2.4 Brief technical description ........................................................................................................6

2.5 Standard equipment ................................................................................................................7

3 Installation ..........................................................................................................................................7

3.1 Initial start-up .......................................................................................................................... 8

3.2 Installation - waterbaths .......................................................................................................... 8

3.3 Installation - oilbaths ............................................................................................................... 9

4 Bath construction and operation ....................................................................................................... 10

4.1 Controls and indications ........................................................................................................ 10

4.2 Switching on ......................................................................................................................... 11

4.3 Setting the parameters .......................................................................................................... 11

4.3.1 Temperature setpoint ..........................................................................................................12

4.3.2 Delayed switch-on .............................................................................................................. 12

4.3.3 Hold time of the setpoint temperature ................................................................................ 13

4.3.4 Setpoint-dependent waiting time ........................................................................................13

4.3.5 Circulating pump (WPE 45 only) .........................................................................................14

4.3.6 Temperature monitor ..........................................................................................................15

4.3.7 Level monitor......................................................................................................................15

4.3.8 Setup menu ........................................................................................................................15

4.3.8.1 Calibration .......................................................................................................................16

4.3.8.2 Selection of temperature monitor (waterbaths only) ......................................................... 17

5 Programming example of a programme sequence ............................................................................. 17

6 Monitoring the programme sequence ...............................................................................................18

7 Temperature monitor and protection devices ..................................................................................... 19

7.1 Mechanical temperature monitor: temperature limiter............................................................19

7.2 Electronic temperature monitor .............................................................................................19

7.2.1 Adjustable temperature monitor (TWW) Protection Class 3.1 to DIN 12880 ......................... 20

7.2.2 Adjustable temperature limiter (TWB) Protection Class 2 to DIN 12880 ................................ 20

7.3 Monitor relay .........................................................................................................................20

8 Use of the cover (special equipment) .................................................................................................21

9 Level control (special equipment) .......................................................................................................21

10 Cooling system (special equipment) ................................................................................................. 22

11 Cleaning and maintenance ..............................................................................................................22

12 Check list for fault rectification ........................................................................................................23

13 Action on supply failure .................................................................................................................. 23

14 Glossary .......................................................................................................................................... 23

15 CE Conformity of Declaration ..........................................................................................................24

16 Address and customer service ..........................................................................................................25

17 Index .............................................................................................................................................. 26

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1 General notes and 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.
In addition we guarantee the supply of spare parts over 10 years.

Observation of the Operating Instructions is necessary for faultless

operation and for any possible claims under warranty. If these

Instructions are disregarded, all claims under warranty, guarantee and

indemnification are excluded.

This mark on the product means:

Note Operating Instructions

Warning – bath hot when operating

The right to technical modifications is reserved.
Dimensional details are not binding.

1.1 Transport

Always use gloves!
If the units W../O.. 22 to 45 have to be carried, at least 2 persons are required.

Place the bath accurately horizontal and not

on an inflammable support.

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2 Technical data

Model 7 1014222945
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 flat 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 5°C - 40°C

rh max. 80% (no condensation)
Overvoltage Category: II
Contamination degree: 2

Setting temperature range 10ºC to 95ºC on waterbaths

with activation of the boiling mode to 100°C, see section

4.3.1

20ºC to 200ºC on oilbaths
Setting accuracy: 0,1°C
Indication accuracy 0,1°C
Working temperature range From 5ºC above ambient temperature on water-

and oilbaths or 15°C above ambient temperature

on waterbaths with circulating pump to nominal

temperature = maximum temperature (see rating plate)

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2.1 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

opening the bath cover!

2.2 Electrical equipment

• Operating voltage see rating label 50/60 Hz, WPE 45: 50Hz

• 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 ( electromagnetic compatibility)

This product is intended to operate on a supply network with a system impedance Z

at the transfer point

max

(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 carried out

by a properly qualified electrician!

2.4 Brief technical description

MEMMERT-water and oilbaths 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 Pt100 temperature sensor (4-wire circuit). The accuracy is as
follows:

WNE ONE
Setting accuracy 0,1ºC 0,1ºC
Temperature fluctuation ±0,1ºC ±0,2ºC

The components of temperature control are controlled by integrated malfunction-recognition. The heaters
are installed outside - therefore no problems through dirt or limeresidue.

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2.5 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 finding

• 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

• Boiling mode for temperatures above 95°C

• Setpoint-dependent waiting time

• Digital overtemperature monitor (on waterbaths choice between TWB Class 2 or TWW Class 3.1,
on oilbaths TWB Class 2)

• Additional digital display of monitoring temperature

• Two separate, stainless-steel Pt100 temperature sensors (Mat.Ref. 1.4571) Class A in 4-wire circuit
for control and monitoring

• Built-in sounder as alarm on overlimit, as audible signal at programme end, and to acknowledge
input (key click)

• Warning at low liquid level

• Convenient calibration directly on the controller at one freely selected temperature

• Manually switched circulating pump, also pump switch-off at programme end (WPE 45 only)

Special equipment (to be ordered separately as accessory): flat cover with concentric ring sets, gable cover
to drain condensate, cooling device, various racks for test tubes, bottles etc.

3 Installation

min.

750mm

space for

air circula-

tion

min.

80mm

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.

space for

air circula-

tion

min.

80mm

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3.1 Initial start-up

When the bath is started up for the first time, it should be supervised continuously until steady conditions
have been reached.

3.2 Installation - waterbaths

Mains
connection

Filling

The mains connection cable must be placed away from any hot surface.

max water level
min water level

drain valve

In order to garant the high quality of the stainless steel it is recommended by the
steel producer to fill the waterbath with deionised water.

IMPORTANT! The water level in the bath must be between the

two markings at the right side of the tub!

Waterbaths can be fitted with a

level control system (see section 9).

Draining The tank can be drained through the drain valve. The thermostating fluid must be cooled

to room temperature before draining. Drain the fluid either directly into an appropriate
container or connect an appropriate hose to the drain valve.

NOTE: Polluted fluids may not be drained directly into the public
wastewater system. If the thermostating fluid is polluted, please

make sure that it will be properly filtered or dumped according to the

applicable regulations.

Operation with non-flammable thermostating liquids only!

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3.3 Installation - oilbaths

Mains
connection

Filling

The mains connection cable must be placed away from any hot surface.

max water level
min water level

drain valve

IMPORTANT! The liquid level in the bath must be between the two

markings at the right side of the tub! The spacing between top edge

of oilbath and liquid level must be at least 30 mm as the oil expands

strongly on heating.

Draining The tank can be drained through the drain valve. The thermostating fluid must be cooled

to room temperature before draining. Drain the fluid either directly into an appropriate
container or connect an appropriate hose to the drain valve.

NOTE: Polluted fluids and oils may not be drained into the

public wastewater system. Please make sure, that the oil will be

properlydumped according to the applicable regulations.

For safety reasons the flash point of the oil must be at 300ºC or higher.

The manufacturer of the oil may also have special regulations for oil-

changing intervals due to pollution oraging of the oil which have to be

observed.

In case of fire never extinguish with water.

Use a suitable damping-down medium (e.g. fire blanket)!

An overheated bath must never be refilled or topped up!!

Warning - bath hot when operating

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