Schmidt IL 30.0 Series User manual

SCHMIDT®Volume Flow Sensor
IL 30.0xx
Instructions for Use

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 2
SCHMIDT®Volume Flow Sensor IL 30.0xx
Table of Contents
1Important information.......................................................................3
2Application range.............................................................................4
3Mounting instructions.......................................................................5
4Electrical connection........................................................................8
5Signalling.......................................................................................10
6Commissioning..............................................................................13
7Information concerning operation..................................................13
8Service information........................................................................14
9Technical data ...............................................................................17
10 Dimensions....................................................................................18
11 Declarations of Conformity............................................................19
Imprint:
Copyright 2021 SCHMIDT Technology GmbH
All rights reserved
Version: 557006.02D
Subject to modifications

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 3
1 Important information
The instructions for use contain all required information for a fast commis-
sioning and safe operation of SCHMIDT®volume flow sensors.
These instructions for use must be read completely and observed care-
fully, before putting the unit into operation.
Working on a pressurized system as well as assembly, electrical instal-
lation, commissioning and operation of the sensor may only be carried
out by trained specialists. Safety and accident prevention regulations
must be observed.
Any claims under the manufacturer's liability for damage resulting from
non-observance or non-compliance with these instructions will become
void.
Tampering with the device in any way whatsoever - with the exception
of the designated use and the operations described in these instruc-
tions for use - will forfeit any warranty and exclude any liability.
The unit is designed exclusively for the use described below (refer to
chapter 2). In particular, it is not designed for direct or indirect protec-
tion of personal or machinery.
SCHMIDT Technology cannot give any warranty as to its suitability for
certain purpose and cannot be held liable for errors contained in these
instructions for use or for accidental or sequential damage in connec-
tion with the delivery, performance or use of this unit.
Symbols used in this manual
The symbols used in this manual are explained in the following section.
Danger warnings and safety instructions. Read carefully!
Non-observance of these instructions may lead to injury of per-
sonal or malfunction of the device.
General note
All dimensions are given in mm.
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 4
2 Application range
The SCHMIDT®Volume Flow Sensor IL 30.0xx is designed as inline
sensor i.e. the tubular measuring section is already integrated in its basic
body.
Four variants with different diameters are offered:
Type
Inner-Ø
[mm]
Thread
connection
Volume flow
[Norm-m3/h]
Article No.
IL 30.005
16.1
DN 15 / G½
76.3
550 250
IL 30.010 MPM
27.3
DN 25 / G1
229
550 251
IL 30.015 MPM
41.9
DN 40 / G1½
417
550 252
IL 30.020 MPM
53.1
DN 50 / G2
712
550 253
Table 1
Connection to the pipe system is carried out by the internal threads on
both sides of the base body, suitable extended measuring sections are
offered by SCHMIDT Technology as optional accessory (see Table 2).
The IL 30.0xx measures both volume flow as well as the temperature of
pure air and other inert
1
gases which are classified in fluid group 2 accord-
ing to the Pressure Equipment Directive 2014/68/EU (PED), i.e. no
chemically aggressive components or abrasive particles are included.
The sensor and the aforementioned measuring sections are designed for
a maximum operating pressure of 16 bar and are covered by article 4,
paragraph 3 of the PED. Accordingly, the devices are designed and man-
ufactured in accordance with the sound engineering practice.
The sensor is based on the measuring principle of a thermal anemometer
and measures the standard volume flow of the measuring medium which
is output in a linear way as standard (respective: Norm) volume flow 
󰇗
(unit: m3/h), referred to standard conditions of TN= 1013.25 hPa and pN=
20 °C. Thus, the resulting output signal is independent of the pressure and
temperature of the measured medium.
The sensor features several special properties, notably due to the unique
Multi-Point-Measurement design (MPM) of its sensor elements:
o Best measurement results even in not fully smoothened air flows
o Excellent sensitivity
o High measurement dynamics
When using the sensor outdoors, it must be protected against
direct exposure to the weather.
1
Check suitability in individual cases.
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 5
3 Mounting instructions
General information on handling
The SCHMIDT®Volume Flow Sensor IL 30.0xx is a precision instrument
with high measuring sensitivity, which can be achieved only by a delicate
structure of its measuring probes. Therefore, applying mechanical forces
to the probe tips inside the housing should be avoided if possible. In case
of cleaning by the customer, this should preferably be made contactless
(e.g. with a spray) or only with appropriate care.
The sensor probes should not be touched or exposed to any
other mechanical effects.
Likewise, a touch can cause electrical damage to the ESD-sensitive sen-
sor elements.
The sensor probes can be damaged by ESD.
To protect the sensitive inside, SCHMIDT Technology delivers the sensor
with protective caps placed into both ends of its body which should be
removed only before final installation. And vice versa when dismounting
the sensor the protective caps should be attached in place immediately.
In general, great care is required when handling the sensor.
The housing of the sensor is made of anodized aluminium. This ensures
a low-friction screw-in of the installation pipes into the housing. Due to the
softness of the material, however, the thread windings could be irreversi-
bly damaged when tilting the pipes while screwing in.
The threads of the sensor body can take irreversible damage if
handled incorrectly, i.e. by tilting pipes when screwing in.
If the sensor is installed without the extended measurement sections,
which are offered optionally by SCHMIDT Technology, the dimensions
and tolerances prescribed by the manufacturer must be observed strictly
for the customized installation.
Corresponding dimensional drawings are available as download from
www.schmidt-sensors.com or www.schmidttechnology.de
The mounting position of the sensor is arbitrary.
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 6
Systems with overpressure
The IL 30.0xx is designed for a maximum working pressure of 16 bar. As
long as the measuring medium is operated with overpressure, make sure
that:
There is no overpressure in the system during installation.
Only appropriately pressure-tight mounting accessories are used.
All connections to pressurized systems are checked for pressure tight-
ness from time to time.
Mounting and dismounting of the sensor can be carried out only
as long as the system is in depressurized state.
The extended measuring sections, which are optionally available from
SCHMIDT Technology (see subchapter Accessories), are delivered with
two O-Rings which are intended as pressure seals for easy installation
(must be applied by customer). If the customer uses his own pipes, suita-
ble installation and sealing equipment must be used (e.g. sealing tape). In
any case take care that the threads are screwed into the housing without
tilting, to avoid damaging of the sensor body. Furthermore, before apply-
ing pressure, the sensor must be checked for a safe and firm installation.
After pressurization check for any leakages and eliminate them immedi-
ately if there are some.
Before applying pressure, make sure that all screw connections
are firmly seated and cannot be loosened. Unscrewing while the
system is under pressure can damage the sensor and can also
result in serious harm to your health.
The pressure sealing parts of the installation have to be checked
regularly for pressure tightness and safe installation.
Flow characteristics
Local turbulences of the medium can cause distortion of measurement
results. The resulting measurement distortions are reduced to a minimum
by the special sensor design “MPM” (Multi-Point-Measurement –all vari-
ants except IL 30.005). In order to get maximum accuracy it’s neverthe-
less advisable to smooth turbulences of the gas flow before applying it to
the sensor.
The simplest method is to provide a sufficiently long distance both in front
of (run-in distance) as well as behind the sensor (run-out distance) abso-
lutely straight and without disturbances.
The absolute length of the respective distances is indicated as a multiple
of the inner diameter D of the pipe.
!
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 7
For optimal measurement results it is recommended to provide standard
distances of at least 10•D before and 5•D after the sensor. Using sensor
types with MPM these distances can be reduced to at least 3•D before
and 3•D after it in case of modest sources of disturbance (e.g. 90° arcs).
If this is not possible, the run-in distance should take up ⅔of the available
measuring length and the run-out distance ⅓of it.
In particular, care must be taken to ensure that the inner diameters of the
attached pipes correspond exactly to that of the sensor. Steps in the pipe
cross-section lead to strong deviations of measurement results and re-
quire longer inlet distances.
Accessories for installation
For mounting of the SCHMIDT®Volume Flow Sensor IL 30.0xx, there
are several accessories available (see Table 2).
Type / article No.
Drawing
Mounting
Connecting cable
fixed length:
5m 523 565
- Threaded ring, hexagon
- Plug injection-moulded
- Wires: 5 x 0.34 mm2
- Material:
Stainless steel
PUR, PVC
Connecting cable
optional length:
xm 523 566
x= 2 … 100 m
(Step: 1 m)
- Threaded ring, hexagon
- Wires: 5 x 0.34 mm2
- Material:
Stainless steel
PA, PUR, PP
Free of halogen2
Coupler socket
Thread locking
system (VA)
523 562
- Threaded ring, hexagon
- Material:
Stainless steel
PA, PUR, PP
- Connection of leads:
Bolted (5 x 0.75 mm2)
Extended measur-
ing sections
½”: 556 954
1”: 556 955
1½“: 556 956
2”: 556 957
- Type of thread:
G and R
- Material:
Stainless steel (pipe)
NBR 70 (O-rings)
Table 2
2
According to IEC 60754
L=5m
14
5,1
42
L=XXm
20
54
4,6
für Kabel- 4-6mm
20
54
For cable-
150
R

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 8
4 Electrical connection
The sensor features two connectors:
Main connector:
- Connection of voltage supply
- Output of measuring signals
Module connector:
For connection of an optional ex-
tension module.
Figure 1
Main connector
This connector is a 5-pin plug, type M12 (male, A-coded) with a thread for
the connecting cable
3
(pin assignment: Figure 2 and Table 3).
Figure 2:
View on connector
of sensor (male)
Pin
Designation
Function
Wire colour
1
Power
+US(+24 V)
Brown
2
Analogue 
󰇗
Volume flow
White
3
GND
GND
Blue
4
Analogue TM
Temperature of medium
Black
5
Impulse
Volume
Grey
Table 3 Pin assignment
The specified lead colours are valid for connecting cables from SCHMIDT
Technology (see subchapter Accessories).
During electrical installation ensure that no voltage is applied and
inadvertent activation is not possible.
The plug housing, and thus also a possibly screen of a plugged connection
cable, is electrically connected to the metal housing of the sensor.
The appropriate protection class III (SELV) respective PELV
(according EN 50178) has to be considered.
3
The spigot nut is located at the connecting cable.
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 9
Power supply
For proper operation the sensor requires direct voltage with a nominal
value of 24 V with permitted tolerance of ±10 %.
Deviating values lead to deactivation of measuring of the volume flow or
even to defects and, therefore, should be avoided. As far as it is function-
ally possible, the LED indication reports the faulty operational conditions
(see chapter 5).
Only operate sensor within the defined range of supply voltage
(US= 24 VDC ± 10 %).
Undervoltage may result in malfunction; overvoltage can lead to
irreversible damage.
Specifications for operating voltage apply to the connection at the sensor.
Voltage drops generated due to line resistances must be considered by
the customer.
The operating current
4
of the sensor is at minimum 25 (15) mA up to a
maximum of 300 (180) mA.
Wiring of analogue outputs
Both analogue outputs (volume flow and temperature of medium) are de-
signed as short-circuit protected current interfaces (4 …20 mA).
The respective load RLmust be connected to the reference potential
(GND) of the sensor.
Load specification: RL≤500 ; CL≤10 nF
Wiring of impulse output
The pulse output (volume) is designed as highside driver (P-MOSFET,
open drain) connected to the (reverse protected) operating voltage. The
output is protected by two methods, a serial diode against higher external
voltage as well as generally by an analogue current limitation with a limit
of typical 50 mA (max. 65 mA).
The load has to be connected to GND.
Module connector
The SCHMIDT®Volume Flow Sensor IL 30.0xx comes with an additional
connector (M12, female, A-coded, 5-pin) for connecting optional expan-
sion modules (see Figure 1).
Only expansion modules from SCHMIDT Technology may be
connected to the module connector.
4
Current of impulse output not included; operation current of IL 30.005 in brackets.
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 10
5 Signalling
Light emitting diodes
The SCHMIDT®Volume Flow Sensor IL 30.0xx has four Duo-LEDs (see
Figure 3) to indicate its operational status (see Table 4):
In error-free operation: Volume flow (bar graph mode)
Problems in operation: Cause of detected error
Figure 3
No.
State
LED 1
LED 2
LED 3
LED 4
1
Ready for operation & volume flow < 5 %5
2
Volume flow > 5 %
3
Volume flow > 20 %
4
Volume flow > 50 %
5
Volume flow > 80 %
6
Volume flow > 100 % = overflow
7
Sensor element defective
8
Operating voltage too low
9
Operating voltage too high
10
Electronic temperature too low
11
Electronic temperature too high
12
Medium temperature too low
13
Medium temperature too high
Table 4
LED off
LED on: orange
LED on: green
LED flashes (1 Hz): rot
5
„%“ of final value of measuring range of volume flow
LED 1