ALTHEN NM1 4L Series User manual

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Althen GmbH Mess- & Sensortechnik
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Althen bv Sensors & Controls
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www.althen.de
V2.1
eng
1 / 2 Axis ilt Measuring System
NM1 / NM2-4L

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Content
1 General Information ............................................................................................................................. 3
1.1 Safety Instructions .................................................................................................................. 3
1.2 Qualified Personnel................................................................................................................ 3
1.3 Intended Use ............................................................................................................................ 3
2 Instructions for use of the measuring amplifier ........................................................................ 4
3 Technical Description ..........................................................................................................................
4 Terminal Assignment .......................................................................................................................... 6
4.1 Supply voltage ......................................................................................................................... 7
4.2 Galvanic isolation ................................................................................................................... 7
4.3 Analogue Outputs .................................................................................................................. 7
 Starting up .............................................................................................................................................. 8
 .1 Description od measuring axis .......................................................................................... 9
 .2 Calibration of the tilt measuring system ...................................................................... 11
 .3 Zero-point adjustment ....................................................................................................... 11
 .4 Adjustment / calibration of the amplifier ................................................................... 11
 . Calculation tilt angle ........................................................................................................... 12
6 Maintenance ........................................................................................................................................ 13
7 Old appliances disposal ......................................................................................................... 13
Appendix ................................................................................................................................................... 14
Datasheet....................................................................................................................................... 14
Order Designation ....................................................................................................................... 14
EMC-mounting ............................................................................................................................. 16
Datasheet Accustar .................................................................................................................... 17

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1 General Information
To ensure reliable and safe operation, the measuring amplifier must be operated in compliance with the
specifications according to this technical description only. These regulations must also be observed if
using accessories, that have been ordered from Althen Mess- & Sensortechnik GmbH together with the
measuring amplifier.
Notice: Every person who is in charge for the start-up or service of this measuring amplifier must have
read this technical manual and must have understood the safety instructions in particular.
1.1 Safety Instructions
When using the amplifier, the legal- and safety regulations for each case of application must be
observed. To avoid risks for the system or the operator the following points are to be considered.
■ If any visual damage or malfunctions are noticed, the measuring system must be switched off
and marked appropriately.
■ Disconnect the supply voltage before opening the device.
■ The complete measuring unit must be protected against contact and influence of
unauthorized persons.
■ In the case of a safety-relevant application, where a potential malfunction could cause
damage to property or persons, it is imperative that an additional, independent monitor is
provided.
■ In combination with sensors, the maximum loads / pressures etc. must never be exceeded.
If you have reasons to assume that safe operation is no longer possible, immediately take the device out
of operation and secure it against unintentional operation.
1.2 Qualified Personnel
This measuring system must be operated by qualified personnel and in compliance with the relevant
technical specifications only. Qualified personnel include such persons who are conversant with the
setting up, mounting and starting up of the measuring system and who have qualifications that are
appropriate for the tasks they're about to perform.
1.3 Intended Use
Amplifiers from Althen Mess- & Sensortechnik GmbH serve to measure the intended measurand and the
evaluation thereof in combination with one or more sensors. Any other use over and above that is
regarded as non-intended use.

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2 Instructions for use of the measuring amplifier
Notice: The parameterizations, closer information concerning the scaling as well as the customized
analogue output can be found on the additional sheet "Device-Configuration".
Since this amplifier is a highly sensitive measurement technology product, it must be used for its
intended use as well as the described operating conditions only. Initial start-up and changes in setup
and settings must be done by qualified personnel only. To prevent interventions / modifications made
by unauthorized personnel, suitable measures must be taken. Both function and calibration must be
checked regularly.
The amplifier must be operated with a separate power source used for measurement devices only.
Shielded cables, preferably twisted in pairs should be used only. The EMC-installation instructions must
be complied with.
The amplifier is contained in an aluminum housing which is equipped with an EMC- cover gasket as
well as EMC-cable glands. After initial start-up the lid is to be closed properly.
The tilt measuring system must be connected to clean earth-potential. Please refer to the EMC-
Mounting-Instructions in order to connect the sensor-shields correctly. To avoid possible potential
equalization currents over the shield of the cable to the following evaluation unit, this shield should be
connected over a suitable capacitor (10 nF / 200 V).
Overall the shield connections must be done properly to EMC-standards (as short as possible with large
wire cross-section) and connected to a central point (star grounding). In order to not increase the
disturbance sensitivity of the amplifier, all cables should be kept as short as possible and should not be
extended. Possible cable-bound disturbances (i.e. noise) must be blocked very near the cable ends
(evaluation unit) by suitable measures.
If it is to be expected that the amplifier is, as example, cleaned with a high-pressure cleaner/ steam jet
an additional protection shall be provided.
Notice: Changes of the measuring system of any kind demand for the explicit approval of Althen Mess-
& Sensortechnik GmbH. Changes of any kind done without that approval exclude all possible warranty
and/or liability of Althen Mess- & Sensortechnik GmbH.
Please note that the tilt measuring system responds not to inclination changes only, but as well to
vibrations and to acceleration forces. If necessary and been ordered, a low pass filter can be installed.
The one axis tilt measuring system is intended for sidewall montage.
The dual axis tilt measuring system is intended for base montage.

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3 echnical Description
The described tilt measuring system is either a single-, or dual axis version. Each measuring channel is
in 4-wire technology. Which means there’s 2 wires for supply and 2 galvanically isolated ones for the
signal.
The input stage of the system is a precision difference amplifier with an input resistance of more than
3 Megaohms.
The on-board tilt sensor, type AccuStar, is supplied with an internal voltage of 10 V. The output signal
has a ground reference. With a tilt of 0 degrees the output signal of the sensor is 2, V. The signal,
which is 33 mV per degree tilt, is amplified to an analogue output of either 0 … 10 Volt, ± 10 Volt, 0 …
20 mA or 4 … 20 mA.
The system supply voltage is galvanically isolated from the internal supply for the sensor and the
analogue output.
A deviation of the zero-point of max. ± 1. degrees may be corrected with the N-potentiometer.

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4 erminal Assignment
The electrical connections of the tilt measuring system are made via EMC cable glands to terminal
blocks inside. The terminal numbering can be found on the blocks itself. The maximum cable cross
section is 2. mm². The EMC-installation instruction is to be complied with.
NM1-IP-4L-12E/24E:
Clamp Description
1 Supply voltage +Ub
2 GND operating voltage
Galvanic isolation
3 Analogue output
4 GND analogue output
NM2-IP-4L-12E/24E
, Description
1 Operating voltage +Ub
2 GND operating voltage
Galvanic Isolation
3 Analogue output y-axis
4 GND analogue output
Analogue output x-axis
6 GND analogue output
X-axis Y-axis X-axis

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4.1 Supply voltage
The supply voltage is with version -24E in the range of 18 to 30 VDC and with version –E12 within 10
to 18 VDC. The presence of the supply/ internal operating voltage is indicated by the 2 green LEDs on
the pcb.
To protect the electronics an (to the supply voltage version corresponding) internal self-healing
“polyswitch-resettable®” fuse is built in. Whether an external additional fuse is necessary is to be
considered. However, an additional external fuse of
SI extern 0,4 A slow is recommended.
4.2 Galvanic isolation
The supply voltage of the amplifier is galvanically isolated from analogue output, sensor supply and
sensor signal. To unset this isolation, just bridge clamp 2 and 4 (resp. 6).
4.3 Analogue Outputs
According to your order the following analogue outputs are available:
…-010-… Analogue output: 0…10 V Zero-point at V
…-B10-… Analogue output: ±10 V Zero-point at 0 V
…-020-… Analogue output: 0…20 mA Zero-point at 10 mA
…-420-… Analogue output: 4…20 mA Zero-point at 12 mA

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5 Starting up
NM1-IP-4L-12E/24E:
1. The measuring system is to be leveled vertically with the cable gland pointing down.
2. The tilt measuring system is to be mounted to a vertical surface on the object. The mounting holes
are visible after remove of the lid.
3. Connect the tilt measuring system according to the terminal assignment. Mind the EMC-instructions.
4. Switch on supply voltage.
. Allow the measuring system approx. 1 minutes to warm up.
6. The possibly necessary zero-point adjustment is to be performed.
7. The function and calibration of the tilt measuring system is to be checked
8. In order to accomplish the EMC and IP 6 protection, the lid is to be closed carefully right after the
initial start-up.
NM2-IP-4L-12E/24E:
1. The measuring system is to be leveled horizontally
2. The tilt measuring system is to be mounted to a horizontal surface on the object. The mounting
holes are visible after remove of the lid.
3. Connect the tilt measuring system according to the terminal assignment. Mind the EMC-instructions.
4. Switch on supply voltage.
. Allow the measuring system approx. 1 minutes to warm up
6. The possibly necessary zero-point adjustment is to be performed.
7. The function and calibration of the tilt measuring system is to be checked
8. In order to accomplish the EMC and IP 6 protection the lid is to be closed carefully right after the
initial start-up.

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5.1 Description / measuring axis
NM1-IP-4L-12E/24E:
M16 EMC
-
Cable Gland
Terminal Clamps
1 – Supply Voltage
2 – Comm.
------galvanic isolation------
3 – Analogue Output
4 – GND analaogue Output
Zero
-
point potentiometer
Sensor
Control
-
LEDs 2x green
Aluminum enclosure
Protection class IP6
Version
..010..
Version..B10..
Version..420..
0 Volt … + Volt … +10 Volt
-10 Volt … 0 Volt … +10 Volt
0 mA … 10 mA … 20 mA
Scaling of
analogue
output
Axis
Notice:
The enclosure is to be
mounted on an grounded
machine part
Version..020..
4 mA … 12 mA … 20 mA

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NM2-IP-4L-12E/24E:
0 Volt … + Volt … +10 Volt
-10 Volt … 0 Volt … +10 Volt
4 mA … 12 mA … 20 mA
Messachse
0 Volt … + Volt … +10 Volt
-10 Volt … 0 Volt … +10 Volt
4 mA … 12 mA … 20 mA
0 mA … 10 mA … 20 mA
0 mA … 10 mA … 20 mA
Clamps
1 – Supply Voltage
2 – Comm.
-------------galvanic isolation
3 – Analogue Output y axis
4 – GND analaogue Output
– Analogue Output x axis
6 – GND analogue output
Sensor y-axis
Sensor x-axis
Zero-Point
potentiometer
y-axis
Control
-
LEDs 2x green
Scaling analogue output Scaling analogue output
X-AXIS Y-AXIS
Zero-Point potentiometer
x-axis
M16 EMC-Cable
Gland
Version -010-
Version -B10-
Version -420-
Version -020-
Measuringaxis

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5.2 Calibration of the tilt measuring system
Notice: The measuring system has been conscientiously calibrated and tested, therefore no change of
amplification/end value should be necessary.
Due to slight inaccuracies while and after montage, or not too straight walls, an adjustment of the
zero-point might be reasonable. The calibration of gain/ end value has to be checked. This setting
should not be changed. However, if an adjustment of gain/ end value is inevitable please refer to
chapter
5.3 Zero-point adjustment
1. Connect a multimeter to the according analogue output, please refer to chapter 4:
Terminal assignment
2. Level the measuring system with the help of e.g. precision spirit level.
3. Now adjust the zero-point according to the table below.
Version Analogue Output Zero-point
NM1/NM2-IP-4L…010 0 … 10 Volts + V
NM1/NM2-IP-4L…B10 ± 10 Volts 0 V
NM1/NM2-IP-4L…020 0 … 20 mA 10 mA
NM1/NM2-IP-4L…420 4 … 20 mA 12 mA
Notice: If the maximum zero-point adjustment range of ± 1. degrees should not be sufficient, a
remounting is to be considered.
5.4 Adjustment / calibration of the amplifier
The gain/ end value potentiometer has been marked with Tamper Evident Seal.
1. Connect a multimeter to the according analogue output, please refer to chapter 4:
Terminal assignment
2. Level the measuring system with the help of e.g. precision spirit level.
3. Now adjust the zero-point.
4. Now tilt the measuring system about 80 … 100% of its maximum range.
. Now use the gain /end value potentiometer to set the analogue output to the desired
value.

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5.5 Calculation tilt angle
Version -010-
Analogue Output = V+
defined angle
full range
x V
Version -B10-
Analogue Output =
defined angle
full range
x 10 V
Version -420-
Analogue Output = 12 mA+
defined angle
full range
x 8 mA
Version -020-
Analogue Output = 10 mA+
defined angle
full range
x 10 mA

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6 Maintenance
The flawless function and calibration of the whole measuring system is to be checked regularly. This
inspection is also necessary after every repair or change of any component of the measurement
system.
7 Old appliances disposal
According to European and German law, it is prohibited to dispose of old electronic
devices into household waste, but must be collected and disposed of separately.
Amplifiers and measurement units manufactured and sold by Althen Mess- & Sensortechnik GmbH
serve B2B purposes only. Therefore, those old appliances must not be given to the communal disposer,
but must be given back to the seller or disposed of properly. If you need any further information, please
contact your local authorities.
These measures serve to protect the environment and allow recycling and recovery of valuable
materials. Furthermore, do electronic devices contain substances that may cause damage to the
environment if burned or dumped with normal household waste.

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Appendix
Datasheet
Number of measuring axis: 1 (Version NM1)
2 (Version NM2)
Operating voltage: 10 … 18 VDC
18 … 30 VDC
Power consumption: Max. 3 W (Version NM1)
Max. 4 W (Version NM2)
Analogue Output/Test Signal: 0 … 10 V / ±10 V max 1 mA
4 … 20 mA max 00 Ohms
Preferred measuring ranges: ± 3°, ± °, ±10°, ± 1 °, ±20°, ± 30°, ± 4 °
Accuracy at 23°: Up to ±1 °: ±0,1°
Up to ±60°: 0, % full scale
Up to ±6 °: on request
Electrical Connections: M16x1, EMC-Cable screw connection on internal extension spring
Enclosure: EMC aluminum-pressure enclosure (IP66)
Dimensions (W x H x D) NM1: 17 x80x 7
NM2:160x160x91
Weight: NM1: ca. 1000g
NM2: ca. 2300g
Storage temperature range: -20°C … +60°C
Operating temperature range: -20°C … +60°C
Order Designation
NM1-IP-4L…
NM2
-
IP
-
4L…
1-axis tilt measuring system
2
-
axis tilt measuring system
…-12E-…
…-24E-…
Operating voltage: 10 … 18 VDC
Operating voltage: 18 … 30 VDC
…-010-…
…-B10-…
…-020-…
…-420-…
Analogue output: 0 … 10 V; Zero-point at V
Analogue output: ±10 V; Zero-point at 0 V
Analogue output: 0…20 mA; Zero-point at 10 mA
Analogue output 4…20 mA; Zero-point at 12 mA
…
-
V
Encapsulated
Electronic
s
and Sensor

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Housing Dimensions
NM1
NM2

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EMC-mounting
Enclosure with high-
frequency-seal
Keep enclosure closed
To improve the noise-
immunity feed the leads
through ferrite-rings
EMI-/RFI-approved
cable lead-through
connect to screen Use with cable
screen
Connect screen to
ground with a
ground
-
clamp
Amplifier/Sensor
Grounding case:
Case need to be
mounted on a
grounded surface!
1
st
Step
2
nd
Step
3
rd
Step
+ Skin cable
+ Lay open the braid
+ Lead cable through cap nut
+ Establish cable in clamping
+ put braid over clamping
+ Braid have to overlap the o-ring
approx. 2mm
+ Put clamping application in
Cable gland
+ Tighten cap nut
+ FINISHED!

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Datasheet Accustar

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Subject to modifications.
All information describe our products in general form.