KMT MTP-NT Series User manual

KMT
- Kraus Messtechnik
GmbH
Gewerbering 9 ● 83624 Otterfing ● Germany

[phone] Fax.-5532
https: / / [e-mail]
MTP-NT
User Manual
Sophisticated multi-channel telemetry system
for rotating application, fully software
programmable with 18 bit resolution
INSTRUCTIONS FOR QUALIFIED PERSONNEL ONLY!
•2 to 256 channels
•18-bit ADC
•Signal bandwidth up to 24000 Hz
•Fully software programmable
•Inputs: STG, POT, IEPE, VOLT,
•Inductive or battery powered
LVDT/RVDT, TH-K-J-S, RTD
•Rugged housing, moisture protected
•Auto offset compensation (STG/VOLT)
•Analog output +/- 10 V
•4 Volt Bridge excitation
•Digital Ethernet output for PC
•STG Input ranges ±40 to ±0.3 mV/V

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Safety notes
•
The device should only be applied by instructed personnel.
•The power head emits strong magnetic radiation at 30-60 kHz to a distance of 300 mm.
Therefore, persons with cardiac pacemakers should not work with this device!
•Magnetic data storage media should be kept in a distance of at least 3m from the power
head to avoid data loss. The same is valid for electromagnetic sensitive parts, devices and
systems.
•Do not place the power head in the switched-on state on metallic objects, because this
results in eddy currents which could overload the device and strongly heat up small objects.
Also, the probe could be destroyed!
•No metallic objects, other than the disc-type coil, should be located in the air gap of the
power head. The same applies to metallic parts within a radius of up to 50 mm in all
directions.
•Do not use damaged or faulty cables!
•Never touch in the area between shaft and inductive head, the rotating shaft itself or rotor
electronic contacts during operation!
•This is a “Class A” system suitable for operation in a laboratory or industrial environment.
The system can cause electromagnetic interferences when used in residential areas or
environments. In this case the operator is responsible for establishing protective
procedures.
Further resources and the latest document versions
MTP-NT Technical Resources Page: https://www.kmt-telemetry.com/support/mtp-nt/
MTP-NT User Manual: https://www.kmt-telemetry.com/support/mtp-nt/Files/MTP-NT-UM.pdf
MTP-NT Software & Information Manual: https://www.kmt-telemetry.com/support/mtp-nt/Files/MTP-NT-SW.pdf
MTP-NT Inductive Powering User Manual: https://www.kmt-telemetry.com/support/mtp-nt/Files/MTP-IND-PWR.pdf

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Short description:
The MTP-NT telemetry is a miniaturized measurement system suitable for sophisticated industrial measurement tasks and rotating
applications. Each 2-channel sensor module is equipped with signal conditioning, anti-aliasing filters, analog-to-digital converters (18 bit)
and a digital communication bus connection. All these up to 128 modules (=256 channels) will be controlled by the MTP-NT-Controller
module via a daisy-chain system bus (extendable to several meters). By this concept it’s possible to install the acquisition modules close to
the sensor to have short connections for the analog sensor lines. This avoids undesired interferences in noisy environments. The MTP-NT
Controller outputs a PCM bit stream signal in NRZ format with data rates up to 10000 kbit/s. The inductive transmitter module transfers the
signal over distances of up to 50 mm and the radio transmitter is able to cover ranges of 10m (or more*), depending on application.
MTP-NT acquisition modules (rotor side)
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-STG2
Acquisition module for 2 strain gauges
Full or half bridge (≥ 120 Ω)
Quarter bridge (120 Ω or 350 Ω)
Fixed excitation voltage: 4.0 Vdc
Offset compensation by auto zero
Manual offset shifting after auto zero
Input ranges ±40 to ±0.3 mV/V
Shunt-calibration 75(25.5) kΩ 0.1%
Signal bandwidth 0 Hz to 24000 Hz*
(*see table of max. cut-off frequencies)
ADC Resolution: 18 bit
Measurement uncertainty < 0.1%
Power supply (VBB): 6 to 9 Vdc
Current consumption: 100mA
(with two full bridges 350 Ω)
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-IEPE2
Acquisition module for 2x
IEPE/ICP®sensors
Excitation current: 4.0 mA
Input ranges: 20 to 0.3 Vpp
Signal bandwidth 3 Hz to 24000 Hz*
(*see table of max. cut-off frequency)
ADC Resolution: 18 bit
Measurement uncertainty < 0.1%
Power supply (VBB): 6 to 9 Vdc
Current consumption: 140 mA
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-VOLT2
Acquisition module for 2x
high level voltage inputs
Input ranges ±10 to ±0.08 V
Signal bandwidth 0 Hz to 24000 Hz*
(*see table of max. cut-off frequencies)
+4 V sensor excitation (max. 33 mA)
ADC Resolution: 18 bit
Measurement uncertainty < 0.1%
Power supply (VBB): 6 to 9 Vdc
Current consumption: 80 mA
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-XVDT2
Acquisition module for 2x
LVDT/RVDT sensors
Excitation voltage = 4.096 Vpp,
rounded rectangle
Excitation frequency = 8 kHz
(changeable by software)
Sensor impedance ≥ 100 Ω (@ 8 kHz)
Signal bandwidth 0 Hz to 200 Hz
Programmable lowpass filter
Power supply (VBB): 6 to 9 Vdc
Current consumption: 130 mA
(with 2x MHR500)
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-POT2
Acquisition module for 2x
potentiometer sensors
Potentiometer resistance ≥120 Ω
Fixed excitation voltage: 4.0 Vdc
Input resistance: 667 kΩ
Signal bandwidth 0 Hz to 24000 Hz*
(*see table of max. cut-off frequencies)
ADC Resolution: 18 bit
Measurement uncertainty < 0.1%
Power supply (VBB): 6 to 9 Vdc
Current consumption: 90 mA
(with two 1 kΩpotentiometers)
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-THERMO 2
Acquisition module for 2x
Temperature Sensor
Inputs galvanically isolated
(max. potential difference 32 Vdc)
Lowpass filter: 1 Hz to 32 Hz
(programmable)
Sensor types:
RTD, Thermocouple, NTC,
(& customer-specific types)
Measuring range :
-273.15 °C to +1635.2 °C
Power supply (VBB): 6 to 9 Vdc
Current consumption: 85 mA
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-BLUE
Bluetooth module to transfer RS232
wirelessly*
Remote On/Off* (concerns battery
powered versions)
Range 5 to 20 m, depends on
application and antenna
Power supply (VBB): 6 to 9 Vdc
Current consumption: 30 mA
(average)
* Required is the
KMT COMMUNICATOR
handheld remote control Blue-
tooth device with USB connector)
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-CON-IND-Tx
Controller for 1 to128
acquisition modules
Output: PCM
built-in inductive transmitter
Programmable via RS232/USB
adapter and remote software
Power supply (VBB): 6 to 9 Vdc
Current consumption: 100 mA
Coming soon!
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-RF-Tx
Radio transmitter
RF output power: 10 mW / 50 mW
Modulation: FM (GMSK)
Frequencies: 300 MHz up to S-Band*
Data rates: 300 kBit/s to 5 Mbit/s*
Modulation input: TTL and RS422
Power supply (VBB): 5 to 9 Vdc
Current consumption: 100 mA
*depends on version
Coming soon!
60 x 40 x 10 mm
Weight 42 grams
MTP-NT-ANALOG
Two Channel Acquisition Module for
strain gauges*,
high level voltage signals*,
potentiometer sensors*,
IEPE/ICP®sensors*,
ext.Sensor supply (12 Volt typ.) *
* the functionality is programmable by
control software ntconfig.exe.
Power supply (VBB): 5 to 9 Vdc
Current consumption: <160 mA (TBD)

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Common characteristics / Environment
Vibration (random) 0.1 g²/Hz (20 Hz to 2 kHz)
Vibration (sine) 20 g (20 Hz to 2 kHz)
Shock (½ sine) 10000 g peak (11 ms)
Static Acceleration 3000 g (depends of mounting!)
Operating temperature -40 to +85°C
optional -40 to +125°C
Storage temperature -40 to +125°C
Humidity 95 % (not condensing!)
Analog Signal Bandwidth vs. Sampling Rate vs. PCM Bitrate
Cutoff frequency of anti-aliasing filter (-3dB) and sampling rate (red)
Bit rate 2 CH 4 CH 8 CH 16 CH 32 CH 64 CH 128 CH 256 CH
10000 kbit/s ----- ----- 24000 Hz
(62500 Hz)
12000 Hz
(31250 Hz)
6000 Hz
(15625 Hz)
3000 Hz
(7812.5 Hz)
1500 Hz
(3906.25 Hz)
750 Hz
(1953.125 Hz)
5000 kbit/s ----- 24000 Hz
(62500 Hz)
12000 Hz
(31250 Hz)
6000 Hz
(15625 Hz)
3000 Hz
(7812.5 Hz)
1500 Hz
(3906.25 Hz)
750 Hz
(1953.125 Hz)
375 Hz
(976.56 Hz)
2500 kbit/s 24000 Hz
(62500 Hz)
12000 Hz
(31250 Hz)
6000 Hz
(15625 Hz)
3000 Hz
(7812.5 Hz)
1500 Hz
(3906.25 Hz)
750 Hz
(1953.125 Hz)
375 Hz
(976.56 Hz)
190Hz
(488.28 Hz)
1250 kbit/s 12000 Hz
(31250 Hz)
6000 Hz
(15625Hz)
3000 Hz
(7812.5 Hz)
1500 Hz
(3906.25 Hz)
750 Hz
(1953.125 Hz)
375 Hz
(976.56 Hz)
190Hz
(488.28 Hz)
95 Hz
(244.14 Hz)
625 kbit/s 6000 Hz
(15625Hz)
3000 Hz
(7812.5 Hz)
1500 Hz
(3906.25 Hz)
750 Hz
(1953.125 Hz)
375 Hz
(976.56 Hz)
190Hz
(488.28 Hz)
95 Hz
(244.14 Hz) -----
312,5 kbit/s 3000 Hz
(7812.5 Hz)
1500 Hz
(3906.25 Hz)
750 Hz
(1953.125 Hz)
375 Hz
(976.56 Hz)
190 Hz
(488.28 Hz)
95 Hz
(244.14 Hz) ----- -----

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MTP-NT connection overview

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MTP-NT connection cables
MTP-NT-BUS-C (-L/-M/-S)
Other lengths on request…
Sensor cable with open end (2x 4-pin, STG or POT) – cut it to the riquired length!
MTP-NT-C-In-2x4
Signal cable 220 mm with open ends (2x 2-pin; VOLT or IEPE) – cut it to the riquired length!
MTP-NT-C-In-2x2
220 mm or 500 mm
MTP-NT-BUS-C-L= 220 mm
MTP-NT-BUS-C-M = 170 mm
MTP-NT-BUS-C-S = 120 mm
220 mm or 500 mm

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MTP-NT connection cables
Data coil cable 500 mm with open ends, shielded – cut it on the right length!
MTP-NT-C-D-COIL-500
Power coil cable 500 mm with open ends – cut it on the right length!
MTP-NT-C-P-COIL-500
RS 232 Connection cable (1 m) to RS232/USB-Adapter
MTP-NT-Config-C
RS232/USB-Adapter
500 mm shield cable with open ends
500mm cable with open ends
Shield must connect
on housing earth

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MTP-NT Bus connection

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MTP-NT housing dimensions for 2- and 4-channels

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MTP-NT Bock diagram

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MTP-NT Bock diagram on shaft

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MTP-NT Modules mounting

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MTP-NT Modules mounting plate example for shaft diameters 100-200 or 150-250mm

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MTP-NT – Setting of parameters or firmware update of all modules via RS232
See MTP-NT Software & Information Manual for details: https://www.kmt-telemetry.com/support/mtp-nt/Files/MTP-NT-SW.pdf
All parameters are programmable
over RS232, RS232/USB-adapter or
wirelessly via *BLUE and *COMM
(*requires MTP-NT Bluetooth module NT-BLUE
& KMT COMMUNICATOR)
BUS I/O
RS232
connection
Inductive data coil
connection
Optional radio transmitter
connection
Active bus
with all
functions
Inactive bus
only for
VBB+ GND!
VBB
GND

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Wireless access to the configuration of MTP-NT acquisition modules via MTP-NT-BLUE
MTP-NT-BLUE
Bluetooth module to transfer RS232 wirelessly*
Remote On/Off* (concerns battery powered versions)
Range 5 to 20 m, depends on application and antenna
Power supply: VBB = 6 to 9 Vdc
Current consumption: 30 mA (average)
* Required is the KMT COMMUNICATOR (handheld remote
control Bluetooth device with USB connector)
Status LED
ON = OK
Powering and
digital bus I/O
Pin antenna
Powering
only

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NEW
KMT COMMUNICATOR for wireless configuration of a remote MTP-NT system via USB
to the Bluetooth module MTP-NT-BLUE (incl. wireless firmware update)
Blue LED - Bluetooth connection
Blinking (2Hz) = searching
ON = Bluetooth connected (Please wait always until Bluetooth
connection is established)
Green LED - Remote system status
Blinking (2Hz) = searching
ON = contact to remote system (means: remote system power ON)
Slow blinking (0.5 Hz) = Low BATT status at battery on rotating
parts
Micro-AB USB Receptacle
for powering and communication to PC
Connected to PC
or notebook
Remote control for switch ON/OFF battery on rotating part
Press button once (1x) =
ON (LED on BLUE module rotor side is ON)
Press button twice (2x) =
OFF (LED on BLUE module rotor side is blinking)
Switching ON/OFF of KMT communicator:
Press button long (>4 seconds) =
switching the communicator ON/OFF (powering of
communicator with internal 9V Lithium battery)
If the communicator is connected via USB, it is always ON and
doesn’t use the local Lithium battery at all (battery saving).
The battery is a primary cell (9 V / 1.2 Ah, >5 years shelf life) so
charging of local battery via USB is not possible.
Test of local 9V Lithium battery of communicator:
If the green LED is 3 sec. fast (10 Hz) blinking at start of
communicator, the battery is empty and you must exchange the
Lithium battery!

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MTP-NT – Easy to connect with daisy-chain connection with
the same MTP-NT-BUS-C cable
The bus is extendable to several meters!
AMP "Locking-Clip" crimp connectors withstand ultra-harsh
vibration and shock environment
Caution: Locking-Clip must be completly connected!
GOOD
😊
BAD
☹

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MTP-NT-DEC8/16/24/32 Receiver unit for max 32 Channels output via 37 pol. D-sub
Inductive transmission 45 MHz version up to 5000 Mbit (10000Mbit on special request!)
Plug-side
Output single-ended
Optional BNC16/32 Box. Connect on 37pol D-Sub
MTP-NT –DEC8/16/24/32 System Parameters:
Channels:8,16,24 or 32x +/-10 V analog outputs via D-sub female socket
Resolution: 16 bit D/A converter, with smoothing filter
Power supply input: 10-30 Vdc, power consumption < 24 Watt
Dimensions: 205 x 105 x 65mm
Weight: 1.25 kg without cables and data pickup head
Overall measurement uncertainty (sensor input → decoder output): < 0.1% without sensor influences
Environmental
Operating: -20°C to +70°C
Humidity: +80% not condensing (@ +20°C)
Vibration: 5g
Static acceleration: 10g in all directions
Shock: 100g in all directions
Front side view
Rear side view
Power Switch
7-pole female TUCHEL connector for
power supply input (10–30V DC)
IND-Pickup head
connection
Active level LED
of Pickup head
Female 37 pole D-sub for analog
signal output, CH 1 to 32
Power ON LED
IND-Pickup head
#2 connection for
shaft diameter
>400mm
Active level LED
of Pickup head
Transmission error LED
inductive power
transmission
status LED
Option: PCM out

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MTP-NT-DIG-DEC-V2 Receiver unit with ethernet (LAN) output
Inductive transmission 45 MHz version up to 5000 Mbit (10000Mbit on special request!)
MTP-NT-DIG-DEC-V2 System Parameters:
Channels:2-256 CH ethernet outputs via LAN
Power supply input: 10-30 Vdc, power consumption < 24 Watt
Dimensions: 205 x 105 x 65mm
Weight: 0.990 kg without cables and data pickup head
Overall measurement uncertainty (sensor input → decoder output): < 0.1% without sensor influences
Environmental
Operating: -20°C to +70°C
Humidity: +80% not condensing (@ +20°C)
Vibration: 5g
Static acceleration: 10g in all directions
Shock: 100g in all directions
7-pole female TUCHEL connector for
power supply input (10–30V DC)
Field strength
indicator
IND-Pickup head
connection
ON/OFF
LED
ON/OFF
switch
Error LED
Sync LED
KMT
use!
Low Batt. LED
LAN OUT
IND-Pickup head
#2 connection for shaft diameter
>400mm necessary!
Active level LED of Pickup
head

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MTP-NT – Example mounting of second pick up at flat coil on shaft