HNP Mikrosysteme mzr-2521 User manual

Operating manual for micro annular gear pumps
mzr-2521 and mzr-2921
HNP Mikrosysteme GmbH
Bleicherufer 25
D-19053 Schwerin
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
http://www.hnp-mikrosysteme.de
Last update: June 2019

Impressum
Original instructions
Copyright
HNP Mikrosysteme GmbH
Bleicherufer 25
D-19053 Schwerin
All rights, including translation, reserved.
Without prior explicit written permission of HNP Mikrosysteme GmbH no part of
this manual may be, copied, reproduced or processed.
This manual has been prepared with care. HNP Mikrosysteme does assume no
liability for any errors in this manual and resulting consequences. Likewise, no
liability is assumed direct or subsequent damages arising from an incorrect use of
the devices.
While using micro annular gear pumps, the relevant standards regarding the
specifications of this manual have to be followed.
Subject to change without notice.

Contents Operating manual mzr-2521 and mzr-2921
Last update: June 2019 i
Contents
1General information 1
1.1 Application scope of the pumps 1
1.2 Product information 1
1.3 Measurements 3
1.4 Flow charts 4
1.5 Technical data of the micro annular gear pump mzr-
2521 and mzr-2921 5
1.6 Technical data of the drive 6
2Safety instructions 8
2.1 Safety symbols in this operating manual 8
2.2 Staff qualification and training 8
2.3 Safety-conscious work 8
2.4 Safety instructions for the operator 9
2.5 Safety instructions for maintenance, check and
assembly of the pump 9
2.6 Unauthorized pump conversions and spare part
manufacture 9
2.7 Improper modes of operation 10
2.8 General safety instructions 10
3Transport and intermediate storage 11
3.1 Shipment of the pumps and protection measures 11
3.2 Transport 11
3.3 Intermediate storage 11
4Description of the micro annular gear pump 12
4.1 Operating principle of the micro annular gear pump 12
4.2 Construction 14
4.3 Construction materials 14
4.4 Liquid supply 15
5Optional modules 18
5.1 Gear box module (optional) 19
5.2 By-pass module (optional) 20
5.3 Drive without encoder (optional) 22
5.4 Drive with a high resolution encoder (optional) 23
5.5 Stepper motor drive (optional) 24
5.6 Brushless DC motor as drive (option) 25
6System integration 27
6.1 Checkup before the first assembly 27
6.2 Mounting of the micro annular gear pump 27
6.3 General instructions for the assembly of the liquid
supply network 28
6.3.1 Assembly of the fluid connection fittings 28

Contents Operating manual mzr-2521 and mzr-2921
ii Last update: June 2019
6.3.2 Installation with the manifold assembly 28
6.3.3 Assembly instruction for tubing and accessories
manifold assembly 29
6.4 Filter selection and use 30
6.5 Operation with the S-ND control unit 31
6.6 Operation with the S-KD control unit (optional) 35
6.7 Operation with the S-KG control unit (optional) 38
6.8 Operation with the S-BL control unit (optional) 42
7The startup/shutdown of a pump 45
7.1 Preparing for operation 45
7.2 Startup of the micro annular gear pump 45
7.3 Flushing procedure after use 45
7.4 Shutdown of the micro annular gear pump 48
7.4.1 Conservation 50
7.4.2 Dismantling of the system 51
7.5 Trouble shooting 52
7.6 Return of the micro annular gear pump to the
manufacturer 52
8Software »mzr-pump control« 53
9»Motion Manager« software (optional) 56
9.1 Direct drive control 56
9.2 Programming of the control unit 58
9.3 Transfer of a mcl-file to the drive 58
10 Accessories for microfluidic systems 65
11 Non-liability clause 65
12 Problems and their removal 66
13 EU Directive 69
13.1 Electromagnetic Compatibility (EMC) 70
13.1.1 EMC Directive and Standards 70
13.1.2 Information on use as intended 71
14 Declaration of conformity 72
15 Service, maintenance and warranty 77
16 Contact person 78
17 Legal information 79
18 Safety information for the return of already
employed micro annular gear pumps and
components 80
18.1 General information 80

Contents Operating manual mzr-2521 and mzr-2921
Last update: June 2019 iii
18.2 Declaration of media in contact with the micro annular
gear pump 80
18.3 Shipment 80
19 Declaration of media in contact with the micro
annular gear pump and its components 81
20 Appendix 82

1 General information Operating manual mzr-2521 and mzr-2921
Last update: June 2019 Technical data subject to change without prior notice! 1
1General information
This operation manual contains basic instructions to be followed during
integration, operation and maintenance of the mzr®micro annular gear pump.
For this reason it is necessary to read it carefully before any handling of the
device. The present manual should always be kept at the operation site of the
micro annular gear pump.
In case assistance is needed, please indicate the pump type visible on the
housing.
1.1 Application scope of the pumps
The micro annular gear pumps mzr-2521 and mzr-2921 described in this manual
are suitable for continuous delivery and discrete dosage of water, watery
solutions, solvents, methanol, oils, lubricating liquids, paints and varnishes as well
as many other liquids.
!
If you intend to handle any aggressive, poisonous or radioactive liquids, you
must conform to safety measures as according to the regulations in force. Any
project concerning handling of corrosive liquids should be previously discussed
with the pump manufacturer.
!
The micro annular gear pumps should not be used for "invasive" medical
applications, in which the liquid having had contact with the pump is re-
introduced to the body.
!
The micro annular gear pumps are not to be used in motor vehicles, rail
vehicles, aircraft and spacecraft. (Approval of the manufacturer necessary!)
!
Exception: The micro annular gear pumps can be used in or on watercrafts.
!
The data concerning resistance of the pumps to manipulated liquids is
elaborated according to the best of HNP Mikrosysteme's knowledge. However,
operating parameters varying from one application case to another, no
warranty for this information can be given.
!
The information given in this manual does not release the customer from
personal obligation to check the integrity, correct choice and suitability of the
pump for the intended use. The use of the micro annular gear pumps should
be conform with technical norms and regulations in force.
If you wish to receive more information than comprised in this manual please
contact directly HNP Mikrosysteme.
1.2 Product information
The present operating manual is valid for the micro annular gear pump types
mzr-2521 and mzr-2921 manufactured by HNP Mikrosysteme GmbH,
Bleicherufer 25, 19053 Schwerin, Germany.

1 General information Operating manual mzr-2521 and mzr-2921
2Technical data subject to change without prior notice! Last update: June 2019
The date of release of the present manual figures on the cover.

1 General information Operating manual mzr-2521 and mzr-2921
Last update: June 2019 Technical data subject to change without prior notice! 3
1.3 Measurements
The micro annular gear pumps mzr-2521 and mzr-2921 have the same outer
measurements.
The pumps are available in two versions featuring different liquid connectors.
figure 1 shows the version with Ø 2 mm slip fittings on which flexible tubes with
internal diameter < 2 mm are stuck. figure 2 shows the version with a manifold
assembly, which is screwed and fixed with a holding nut to a preadapted
support.
figure 1 Measurements of the micro annular gear pumps mzr-2521 and mzr-2921, version with fluid connections, slip
fitting Ø 2 mm
figure 2 Measurements of the micro annular gear pumps mzr-2521 and mzr-2921 with the manifold assembly M2

1 General information Operating manual mzr-2521 and mzr-2921
4Technical data subject to change without prior notice! Last update: June 2019
1.4 Flow charts
Liquid water Liquid oil
0
2
4
6
8
10
00,5 11,5
Differential pressure [bar]
Flow rate [ml/min]
6000
5000
4000
3000
2000
1000
Speed [rpm]
Viscosity 1 mPas
Liquid water
0
2
4
6
8
10
00,5 11,5
Differential pressure [bar]
Flow rate [ml/min]
6000
5000
4000
3000
2000
1000
Speed [rpm]
Viscosity 16 mPas
Liquid oil
figure 3 Flow charts of mzr-2521
Liquid water Liquid oil
0
5
10
15
20
012 3
Differential pressure [bar]
Flow rate [ml/min]
6000
5000
4000
3000
2000
1000
Speed [rpm]
Viscosity 1 mPas
Liquid water
0
5
10
15
20
0 1 2 3
Differential pressure [bar]
Flow rate [ml/min]
6000
5000
4000
3000
2000
1000
Speed [rpm]
Viscosity 16 mPas
Liquid oil
figure 4 Flow charts of mzr-2921

1 General information Operating manual mzr-2521 and mzr-2921
Last update: June 2019 Technical data subject to change without prior notice! 5
1.5 Technical data of the micro annular gear pump mzr-2521 and mzr-2921
mzr-2521
mzr-2921
Technical data
Displacement volume 1.5 µl 3 µl
Housing length without fluid connections 69 mm 69 mm
Housing length with fluid connections
−slip fitting version Ø 2 mm
− manifold assembly version
75 mm
71 mm
75 mm
71 mm
Diameter 13 mm 13 mm
Weight
−slip fitting version Ø 2 mm
−manifold assembly version
56 g
65 g
56 g
65 g
Internal volume 65 µl 67 µl
Housing material stainless steel
316L (1.4404),
epoxy resin adhesive
stainless steel
316L (1.4404),
epoxy resin adhesive
Fluid connector material stainless steel 316L (1.4404)
Rotor material tungsten carbide (WC-Ni)
Bearing material tungsten carbide (WC-Ni) / ceramics
Dynamic sealing graphite-reinforced PTFE, stainless steel spring 316L
Static sealing FKM; optional EPDM, FFKM
Performance parameters
Min. flow rate Q (at 1 rpm) 0.0015 ml/min* 0.003 ml/min*
Max. flow rate Q (at 6000 rpm) 9 ml/min (= 0.54 l/h) 18 ml/min (= 1.08 l/h)
Min. dosage volume 0.25 µl 0.5 µl
Differential pressure (at viscosity 1 mPas) 1.5 bar 3 bar
Max. applied inlet pressure 1 bar 1 bar
Viscosity 0.3 - -- 100 mPas
(1000 mPas*)
0.3 - -- 100 mPas
(1000 mPas*)
Dosage precision CV 1 % 1 %
Operating temperature -20 … 60 °C -20 … 60 °C
Ambient temperature -20 … 65 °C -20 … 65 °C
Storage temperature 10 … 40 °C 10 … 40 °C
Pulsation of flow (theoretical value) 1.5 % 6 %
NPSHR value 0.6 m 0,6 m
Legend: * with supplementary modules CV Coefficient of variation
NPSHR Net Positive Suction Head Required
table 1 Technical data and performance parameters of the micro annular gear pumps mzr-2521 and mzr-2921
Warning The material property of a liquid (e.g. viscosity, lubricating property, particle
content, corrosiveness) impacts the technical data and the service life of
pumps.
At appropriate conditions the characteristic values may be increased or
decreased.
Warning If you intend to operate the pump out of the range of the above given
specification, please consult the manufacturer. Modifications may be necessary
to ensure successful operation. Otherwise the pump or the system may be
damaged seriously.

1 General information Operating manual mzr-2521 and mzr-2921
6Technical data subject to change without prior notice! Last update: June 2019
1.6 Technical data of the drive
The micro annular gear pumps mzr-2521 and mzr-2921 are driven by
DC motors with graphite brushes. The motors are highly dynamic and suitable for
programmed dosage tasks performed by the micro annular gear pump.
Measurements
Diameter of the motor housing 13 mm
Length of the motor housing 42 mm
Performance parameters
Nominal voltage 18 V
Max. continuous torque 2,47 mNm
Power 3 W
No-load speed at 18 V 12,800 rpm
No-load speed at 9 V 6000 rpm
Max. continuous current 217 mA
Terminal resistance 21.5 Ω
Speed constant 738 rpm/V
Terminal inductance 0.75 mH
Speed range 1 - -- 6000 rpm
Cable length 150 mm
table 2 Technical data of the micro annular gear pumps mzr-2521 and mzr-2921
1
2
10 9
12
6 5
10-pole 6-pole
figure 5 Pin configuration of the connection socket
Pin
Description
1 Motor +
2 Vcc (5 VDC)
3 Channel A
4 Channel B
5 SGND
6 Motor - --
table 3 Pin configuration of the motor cable

1 General information Operating manual mzr-2521 and mzr-2921
Last update: June 2019 Technical data subject to change without prior notice! 7
The standard motor is delivered with a 16 counts per turn digital magnet
encoder.
Encoder
Voltage supply Vcc 3.8 - -- 24 VDC
Number of channels A, B 2
Counts per turn 16
Output signal Vcc = 5 VDC compatible TTL
Power consumption at Vcc = 5 VDC max. 8 mA
Phase difference 90°
Operating temperature -20 … + 80°C
table 4 Technical data of the digital magnet encoder
The motor can alternatively be delivered:
−with a gear box module as reduction gears (see chapter 5.1)
−without encoder (see chapter 5.3)
−with a high resolution encoder 256 counts per turn (see chapter 5.4)
−with a stepper motor (see chapter 5.5)
−with a 6-pole connection plug (see chapter 6.7)

2 Safety instructions Operating manual mzr-2521 and mzr-2921
8Technical data subject to change without prior notice! Last update: June 2019
2Safety instructions
Please comply not only with the general safety instructions listed below, but also
with specific safety instructions mentioned in the following chapters.
2.1 Safety symbols in this operating manual
Non respect of the safety instructions marked with the following signs represents
danger to people:
Danger symbol High voltage symbol
!
Safety symbol according to
DIN 4844 - -- W9
Safety symbol according to
DIN 4844 - -- W8
Non compliance with the safety instructions marked with the following sign
represents a risk of damage to the micro annular gear pump:
Warning
Operating instructions machined directly on the pump such as the indication of
liquid input and output should be followed and kept in a clearly readable
condition.
2.2 Staff qualification and training
The staff operating, servicing, inspecting and assembling the pumps must
evidence the appropriate qualification for these works. Areas of responsibility and
competence as well as monitoring of the staff must be precisely regulated by the
operator in charge. If the personnel do not have the necessary knowledge, they
must be trained and instructed accordingly. If necessary, this can be implemented
by the supplier or the manufacturer on behalf of the operator. Furthermore, the
operator in charge must ensure that the content of the present manual has been
fully understood by the personnel.
2.3 Safety-conscious work
The safety instructions listed in this operating manual, applicable national
regulations concerning accident prevention as well as internal work, operation
and safety regulations of the operator must be complied with.

2 Safety instructions Operating manual mzr-2521 and mzr-2921
Last update: June 2019 Technical data subject to change without prior notice! 9
2.4 Safety instructions for the operator
The surface temperature of the motor under full load may exceed 60°C. If
needed, this surface should be protected on site against contact in order to avoid
skin burns.
The drive should be protected against dust, water vapor condensation, humidity,
splash water, aggressive gases and liquids. Please provide for an adequate air
ventilation and thus cooling of the motor.
The micro annular gear pumps mzr-2521 and mzr-2921 must not be used in
areas exposed to explosion risks or in proximity of inflammable gases and vapors.
Possible leaks of dangerous liquids (for example from the shaft sealing) should be
guided away in a way not to represent any danger for the personnel and the
environment. The pump should be regularly checked for possible leakage. All
legal requirements in this matter should be complied with.
Take care that all risks resulting from the electric energy are excluded. For details
please refer to the instructions provided by the authorities in charge or your
power supplier.
Warning Please insure, that the totality of the liquid supply system such as tubes, hoses,
filters etc. are free from dust or dirt particles. Impurities such as metal swarf,
plastic or glass splinters may impair or damage the pump leading to its failure.
Warning Please, operate the pump with a filter featuring 10 µm or smaller pores. It will
protect the pump.
2.5 Safety instructions for maintenance, check and assembly of the pump
As a rule all maintenance work on the device should be performed when it is at a
standstill. The turning-off procedure described in this manual must be followed.
Pumps delivering liquids hazardous to health must be decontaminated.
Immediately after the work had been completed all safety equipment and
protection measures should be applied.
Before starting the operation, please take notice of the instructions listed in the
chapter 7.
Warning Should a malfunction of the mzr-pump occur, do not dismantle the pump on
your own but contact one of HNP Mikrosysteme service staff for professional
assistance.
2.6 Unauthorized pump conversions and spare part manufacture
Conversions or modification to the device are only permitted with prior consent
of the manufacturer. Original spare parts and accessories authorized by the
manufacturer ensure safety. The use of other parts will annul the liability of the
pump manufacturer for any resulting consequences.

2 Safety instructions Operating manual mzr-2521 and mzr-2921
10 Technical data subject to change without prior notice! Last update: June 2019
2.7 Improper modes of operation
The safety of operation of the delivered device can only be insured by correct use,
as described in chapter 1. The limit values given in this manual must not be
exceeded in any case.
2.8 General safety instructions
Please observe the following safety instructions
!
The pump may operate at high pressures. For this reason please use only the
delivered accessories and ensure that the employed fittings and tubing have
been prescribed and approved for these pressures.
!
In order to decrease the pressure, provide the system with a pressure control
valve directing the excess liquid to the initial tank or back onto the suction
side.
!
At a standstill, the liquid may flow through the pump in the direction of falling
pressure. In order to avoid this unwanted movement, please integrate non-
return valves (see accessories). This applies also to elevated liquid containers.
!
Protect the micro annular gear pump and the electric drive against strokes and
shocks.
!
Under normal working conditions the shaft sealing rings integrated in the
pump prevent the liquid from leaking out of the device. The micro annual gear
pumps are "technically leak-proof" however not "hermetically sealed" which
means it may occur that gases or liquids enter to or escape from the pump.
The allowed electrical parameters of the drive must not be exceeded. In
particular an incorrect polarity setting of the supply voltage may lead to
damage of the control unit.
Warning Please insure, that the totality of the liquid supply accessories such as tubes,
hoses, filters etc. are absolutely free from dust or dirt particles. Impurities such
as metal swarf, plastic or glass splinters may impair or damage the pump
leading to its failure.
Warning Please, operate the pump with a filter featuring 10 µm or smaller pores. It will
protect the pump.

3 Transport and intermediate storage Operating manual mzr-2521 and mzr-2921
Last update: June 2019 Technical data subject to change without prior notice! 11
3Transport and intermediate storage
3.1 Shipment of the pumps and protection measures
The pumps leaving the factory are secured against corrosion and shocks. The
inlets and outlets of the pumps are protected with plastic plugs in order to
prevent any foreign bodies from penetrating into the device.
3.2 Transport
In order to avoid any transport-related damage, the package must be protected
against shocks. HNP Mikrosysteme guarantees that all goods leave the factory in
the best condition. Any noticed damage should be reported to the concerned
forwarding agent, authorized dealer or to HNP Mikrosysteme
as manufacturer.
3.3 Intermediate storage
Following points concerning pump storage should be observed:
−necessary conservation procedure (see also chapter 7.4.1)
−the protective caps must be put on
−the pump should not be stored in humid places
−for storage temperature - refer to chapter 1.5 of the present manual

4 Description of the micro annular gear pump Operating manual mzr-2521 and mzr-2921
12 Technical data subject to change without prior notice! Last update: June 2019
4Description of the micro annular gear pump
4.1 Operating principle of the micro annular gear pump
Micro annular gear pumps are positive displacement pumps. They contain two
rotors bearing slightly eccentrically to each other; an externally toothed internal
rotor and an annular, internally toothed external rotor (see figure 6). Due to their
cycloid indenting, the rotors remain interlocked at any time, forming during
rotation a system of several sealed pumping chambers. As the rotors revolve
around their offset axis, the pumping chambers increase on the induction
(suction) side and simultaneously decrease on the delivery side of the pump (see
figure 7). A homogenous flow is generated between the kidney-like inlet and
outlet.
internal
rotor
external
rotor
delivery sideinduction side
inlet outlet
figure 6 Principle of the micro annular gear pump
figure 7 Operating principle of the micro annular gear pump
In the case of rotary displacement pumps, the delivered amount of liquid may be
easily calculated form the displacement volume Vgof the pump and the number
of revolutions of the rotor n. Displacement volume stands for the volume of liquid
that is moved within one revolution cycle of the rotor. This relation is illustrated
by the following formula:
nV
QgVol ⋅⋅
= η
The volumetric efficiency
η
Vol shows the relation between the actual and the
theoretical flow rate values. The existing differences result from internal
movement of the liquid during the operation.

4 Description of the micro annular gear pump Operating manual mzr-2521 and mzr-2921
Last update: June 2019 Technical data subject to change without prior notice! 13
Example: According to the formula mentioned above the mzr-2521 pump
featuring a displacement volume of 1.5 µl, delivers at 3000 rpm and with a
volumetric efficiency of 100% 4.5 ml/min. The table 5 shows theoretical flow rate
values depending on speed expressed in ml/min and ml/h.
mzr-2521
mzr-2921
Speed [rpm]
Q [ml/min]
Q [ml/h]
Q [ml/min]
Q [ml/h]
500 0.75 45 1.5 90
1000 1.5 90 3 180
2000 3 180 6 360
3000 4.5 270 9 540
4000 6 360 12 720
5000 7.5 450 15 900
6000 9 540 18 1080
table 5 Theoretical flow rate of the micro annular gear pumps mzr-2521 and mzr-2921
The pressure generated by the pump is determined by the configuration of the
liquid delivery system and results from both the hydraulic pressure and the
hydraulic resistance (tubing, narrow passes etc.). The volumetric efficiency of the
pump decreases when the differential pressure rises.
The viscosity of the handled liquid has an important impact on the volumetric
efficiency. The volumetric efficiency increases for higher viscosity values because
the internal leakage values go down.
Cavitation is an effect which, starting form a certain limit speed value, may
reduce the volumetric efficiency of a pump. In the case of high viscosity liquids
this limit speed value is lower. That happens because of the liquid-specific drop of
vapor pressure in the induction (suction) tube which leads to gas formation inside
the pump.
The particularity of the mzr-pumps is their highly precise construction design,
which provides for both high operating pressures and a high dosage precision.
The gap between both rotors and between the rotors and the adjacent case parts
lies in the range of a few micrometers. This precision is the key factor enabling to
achieve volumetric efficiency close to 100%.

4 Description of the micro annular gear pump Operating manual mzr-2521 and mzr-2921
14 Technical data subject to change without prior notice! Last update: June 2019
4.2 Construction
The micro annular gear pump (figure 8) is composed of the pump head, the drive
unit and the connection cable with plug. The micro annular gear pump head is
available with two different fluid connection versions.
Slip fittings Ø 2 mm Fluid connection manifold assembly
10-pole
connector
motor with
encoder
connection
cable
pump head
fluid connectors
motor with
encoder
connection
cable
10-pole
connector
pump head
fluid connectors
cap nut
figure 8 Layout of the micro annular gear pumps mzr-2521 and mzr-2921
4.3 Construction materials
Wetted parts
Construction material
Housing stainless steel 316L (1.4404)
(optional: nickel silver), epoxy resin, adhesive
Fluid connectors stainless steel 316L (1.4404)
Rotors tungsten carbide (WC-Ni)
Bearing ceramics and tungsten carbide (WC-Ni)
Dynamic sealing (shaft sealing) graphite-reinforced PTFE,
spring: stainless steel 316L
Static sealing (O-rings) FKM (fluoroelastomer),
optional EPDM, FFPM (perfluoroelastomer)
table 6 Construction materials of the wetted parts mzr-2521 and mzr-2921
Resistance of the construction materials to the delivered liquids should be verified
by the operator for each individual application. For non-lubricating liquids service
life of the pumps is shorter.