KEM SRZ Series User manual

Operation Manual
SRZ Helical Flow Meters
Küppers Elektromechanik

Operating Instructions for Helical Flow Meters Type SRZ
2 KEM
Contents
Liebigstr. 2 • 85757 Karlsfeld • Tel. [phone] • Fax [phone] ... Fehler! Textmarke nicht
definiert.
1General Information .......................................................................................... 3
1.1 At a Glance................................................................................................................... 3
1.2 Safety........................................................................................................................... 3
1.2.1 General Safety........................................................................................................................................3
1.2.2 Special requirements for Ex installations .................................................................................................3
1.3 Ordering Codes and Accessories .................................................................................... 4
1.3.1 Ordering Code........................................................................................................................................4
1.3.2 Accessories ............................................................................................................................................4
2Getting started .................................................................................................. 5
2.1 Unpacking.................................................................................................................... 5
2.2 Operating Elements....................................................................................................... 5
2.3 Pin Assignments ........................................................................................................... 5
3Installation ....................................................................................................... 6
3.1 Mechanical................................................................................................................... 6
3.1.1 Installing the SRZ...................................................................................................................................6
3.2 Electrical ......................................................................................................................7
3.3 Ex installation .............................................................................................................. 7
4Operation......................................................................................................... 8
4.1 Evaluation.................................................................................................................... 8
5Service and Maintenance .................................................................................... 9
5.1 Maintenance................................................................................................................. 9
5.2 Trouble shooting .......................................................................................................... 9
5.3 Service .........................................................................................................................9
6Listings ...........................................................................................................10
6.1 Warranty ....................................................................................................................10
6.2 Declaration of conformity.............................................................................................10
6.3 Technical Data.............................................................................................................10
6.3.1 General ................................................................................................................................................ 10
6.3.2 Electrical Data ...................................................................................................................................... 10
6.3.3 Ex Supply Data .................................................................................................................................... 11
6.4 Mechanical Drawings...................................................................................................11
6.5 WEEE 2002/96/EC........................................................................................................11
6.6 Address.......................................................................................................................12

Operating Instructions for Helical Flow Meters Type SRZ
KEM 3
1 General Information
1.1 At a Glance
The SRZ Helical flow meters are positive displacement meters with built-in hall sensors. They
provide high resolution and reverse-flow detection.
The SRZ meters are perfect for media with high viscosity (30 to 10 x 106mm²/s) featuring high
accuracy and low pressure drop.
The measurement is pulsation free and insensitive to pulsating flows.
1.2 Safety
1.2.1 General Safety
All statements regarding safety of operation and technical data in this manual will only apply when
the unit is operated correctly in accordance with this manual.
The data for Ingress Protection (IPxx) will only apply when all connectors are caped properly with
the corresponding counterpart with the same or better IP rating. Cable glands must be populated
with cables with the specified diameter and closed properly.
During operation all openings of the housing must be closed unless otherwise noted in this manual.
All connections to the load and to the supply must be made with shielded cables unless otherwise
noted in this manual. This unit must be grounded.
1.2.2 Special requirements for Ex installations
When used in hazardous area a suitable separation amplifier or zener barriers must be used.
When using long cables make sure that the maximum inductances and capacitances for the
respective voltage or gas group are not exceeded.

Operating Instructions for Helical Flow Meters Type SRZ
4 KEM
1.3 Ordering Codes and Accessories
1.3.1 Ordering Code
SRZ ** –**–* *–*
O-ring material
V = Viton
T = Teflon
Pickup
A, C, R= integral dual pickup
HR = integral dual high-resolution pickup
Material, connections
ST = standard stainless steel, G 3/4"
Size, measuring Range
40 (HR) = 0.4 up to 8 ltr./min
40 (A, C. R) = 0.4 up to 40 ltr./min
100 (A, C. R) = 1.0 up to 100 ltr./min
400 (A, C. R) = 4.0 up to 400 ltr./min
1.3.2 Accessories
Ordering Code Short description
Connector M12; 5 pin, male; 713
cable, 5-core, black, 5 m with connector M12
EWS* Intrinsically safe power supply and separation amplifier

Operating Instructions for Helical Flow Meters Type SRZ
KEM 5
2 Getting started
2.1 Unpacking
Verify that you have received the following items:
• SRZ Helical flow meter
• Operational Manual
2.2 Operating Elements
1 = electrical Connector
2 = flow input
3 = flow output
2.3 Pin Assignments
Type Pin 1 Pin 2 Pin 3 Pin 4 Pin 5
SRZ-A + UB fAGND 2 * f fB
SRZ-C + UB GND 2 * f PE
SRZ-R + UB Direction GND 2 * f n. c.
SRZ-HR + UB fB GND fA n. c.
+UB = 12 … 30V DC
SRZ-A is not available as Ex.

Operating Instructions for Helical Flow Meters Type SRZ
6 KEM
3 Installation
Note
All installations murst be carried out by qualified service personnel.
3.1 Mechanical
Make sure the measuring range of the meter cannot be exceeded by more than 20%. Purge your
pipe system before installing the SRZ. Particles must not enter the SRZ as they could block the screw
spindles. This is particularly important for the smallest size SRZ 10.
As a precaution the use of the following filters for the measuring medium is recommended:
SRZ 10: .......... 120 micron
SRZ 40: .......... 200 micron
SRZ 100.......... 300 micron
SRZ 400 .......... 300 micron
3.1.1 Installing the SRZ
Mount the SRZ in a way that the main flow is in direction fo the arrow on the SRZ type plate. The
SRZ works independent of the mechanical orientation. However, we recommend a vertical
orientation with upwards going flow for low flow rates and low viscosities.
Connect the SRZ with the corresponding fittings (see chapter 6.4) and use the required sealants.
Note
Never use fibrous sealants such as hamp of teflon strip for sealing.

Operating Instructions for Helical Flow Meters Type SRZ
KEM 7
3.2 Electrical
Make sure that the flow meter is grounded.
Note
The housing of the SRZ* is connected to the shield of the cable. In bigger systems a separate
grounding of the meter might be required for avoiding high currents in the cable shield. In that case
the shield might be left open or grounded via a capacitance of e. g. 100nF to avoid ground loops.
Note
Inproper grounding and shielding may lead to bad EMC behaviour or danger to your health!
Connect the SRZ* via a shielded cable to the control unit. The SRZ is specified for a supply voltage of
15 V or 24 V and will operate at supply voltages from 12 V up to 30 V,
Note
Make sure that all cable and wires are connected and fixed properly before applying power to the
SRZ*!
Figure 1: Output stage of the VTE*
The output driver for the frequency output is an asymmetrical push pull output stage with the
protective resistors of R1 = 720 Ωand R2 = 470 Ωas shown in Note .
Note
The output can withstand a short circuit to ground for an infinite period whereas a short circuit to
the positive supply for longer than a few seconds might destroy the output stage!
3.3 Ex installation
The SRZ*-Ex is intrinsically save when operated with an EWS or zener barriers as described in the
technical data (see chapter 6.3)
Mount the SRZ* as described in chapter 3.1.
Connect the SRZ to the intrinsically safe power supply type EWS or to suitable the zener barriers.
Note
When used in hazardous areas the SRZ* must not be connected to any circuitry except our
intrinsically safe power supply type EWS or suitable zener barriers.

Operating Instructions for Helical Flow Meters Type SRZ
8 KEM
4 Operation
The SRZ* is ready to use and does not require any special settings. After applying the supply voltage
the unit immediately provides an output signal proporional to the flow.
4.1 Evaluation
The K-factor is individually determined for each SRZ, this factor specifies the exact pulse
rate per litre. The K-factor can be found in the calibration record, which is supplied with
every SRZ. The calibration record contains specifications to adjust the evaluation
equipment.
The actual flow is calculated as follows:
with
Q = flow rate in litres per minute
f = output frequency in Hz
K = K-factor of the SRZ in pulses per litre
Qf60
K
=⋅

Operating Instructions for Helical Flow Meters Type SRZ
KEM 9
5 Service and Maintenance
5.1 Maintenance
The SRZ* does not require regular maintenance.
For best performance, however, we recommend a recalibration every year if operated 24 hours a day
or every 2 years if the unit is running less than 24 hours a day.
When used with aggressive or abrasive media the SRZ* should be checked and recalibrated even
more often.
If there is no flow over a longer period, the SRZ* should be emptied and cleaned. This is especially
important if curing media like paints are measured.
For recalibration and test, please contact your nearest dealer or directly KEM.
For the addresses see chapter 6.6
5.2 Trouble shooting
In case the VTE* does not work properly, first check the following items:
No output signal
All cables properly connected?
Îconnect the missing cables
VTE* properly mounted?
ÎCheck mounting position and, if necessary, mount the VTE* properly
Output frequency too low
All cables properly connected?
Îreconnect the loose cables
Meter working properly?
ÎCheck and, if necessary, replace the meter
Output frequency too high or unstable
Most probably EMC problems
Shield and ground properly connected?
ÎConnect shield properly. If necessary, try additional means of grounding and shielding
5.3 Service
The SRZ* does not contain any user serviceable parts.
In case of malfunction, please contact your nearest dealer or directly KEM.
For the addresses see chapter 6.6

Operating Instructions for Helical Flow Meters Type SRZ
10 KEM
6 Listings
6.1 Warranty
KEM warrants material and production for a period of 18 months after installation and start up, max.
24 months from delivery date.
6.2 Declaration of conformity
See separate sheet
6.3 Technical Data
6.3.1 General
SRZ 40 HR
SRZ 40
SRZ 100
SRZ 400
0,40
0,40
1,00
4,00
33,000
3,500
850
214
5,000
1,740
1,750
1,800
Type
size
Measuring Range
ltr./min
K-Factor
pulses/ltr.
Frequency Range
in Hz
up to
up to
up to
up to
8
40
100
400
20
20
8
14
up to
up to
up to
up to
Measuring media: fluids free of ferro-magnetic particles
Linearity: ±0.5% of actual flow at 30 mm²/s or higher
±0.25% of actual flow at 100 mm²/s or higher
Repeatability: ±0.1%
Operating temperature: –20 up to +70°C
Materials: SS 303 or SS316Ti/SS316L
Ingress protection: IP67
Measuring ranges and accuracy are valid for viscosities of 30 mm²/s of higher. K-factors and
frequencies are average values – individual values are included in calibration records.
6.3.2 Electrical Data
Nominal supply voltage: 15 VDC and 24 VDC
Supply voltage range: 12 up to 30 VDC
Supply current: typically < 20 mA at no load
Output type: Push pull
Max output current: > 10 mA max. (typically 20 mA)
Output short circuit to GND: infinite
to +UB < 1 s

Operating Instructions for Helical Flow Meters Type SRZ
KEM 11
6.3.3 Ex Supply Data
Supply circuit (pin 1 and 3)
Voltage Ui = DC 30V
Current Ii = 120mA
Power Pi = 850mW
effective internal capacitance Ci = 8 nF
Signal current ciruit push/pull (pin 4 and 3)
Voltage Ui = 30 V
Current Ii = 24.6 mA
Power Pi = 185 mW
effective internal capacitance Ci = 8 nF
6.4 Mechanical Drawings
Type G L D PN
SRZ 40
SRZ 100
SRZ 400
¾"
1"
1½"
155 mm
221 mm
318 mm
85 mm
110 mm
134 mm
400 bar
400 bar
400 bar
6.5 WEEE and RoHS
The unit described herein is not subject to the WEEE directive and the corresponding national laws.
At the end of life forward the unit to a specialised recycling company and do not dispoes it of f as
domestic waste.
The unit described herein fully complies with the RoHS directive.

Operating Instructions for Helical Flow Meters Type SRZ
12 KEM
6.6 Address
Main office
KEM
Küppers Elektromechanik GmbH
Liebigstr. 2
DE-85757 Karlsfeld
Germany
Phone [phone]
[email protected]
www.kem-kueppers.com
Please see our website for worldwide contacts.
Subject to change without notice, St Rev. 001/11/08