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Sig­nal In­puts for Vibra­tion Meas­ure­ment

The input mod­ules on the IfTA plat­form cap­ture sensor sig­nals quickly and without in­ter­fer­ence. The AD4 fam­ily of input mod­ules offer the highest sig­nal qual­ity through true 24-bit AD con­ver­sion. Vibra­tion phe­nom­ena can be de­tec­ted syn­chron­ously with up to 102.4 kHz, on up to 32 chan­nels. These can also be sup­ple­men­ted with input mod­ules for slow ana­log or di­git­al sig­nals. For highly ac­cur­ate meas­ure­ment of an­gu­lar mo­mentum, the AT2 High Speed Timer input mod­ule is also avail­able. Its out­stand­ing pre­ci­sion and ver­sat­il­ity was awar­ded 2nd place at the messtec + sensor mas­ters award 2017.

Tor­sion­al vi­bra­tion mod­ule

 

Over­view of Input Cards

Sig­nal Ac­quis­i­tion

Eingangskarte IfTA AD4

AD4

  • 4 fast syn­chron­ous ana­log in­puts (voltage, cur­rent)
  • Samp­ling rate of up to 102.4 kHz
  • Cost-ef­fect­ive basis card

More In­form­a­tion

Eingangskarte Ad4IEPE

AD4IEPE

  • 4 fast syn­chron­ous ana­log in­puts (voltage, cur­rent)
  • Samp­ling rate of up to 102.4 kHz
  • For ATEX-cer­ti­fied meas­ure­ment chains with charge amp­li­fic­a­tions

 More In­form­a­tion

Eingangskarte IfTA AD4Pro

AD4Pro

  • 4 fast syn­chron­ous, ana­log FleXense in­puts (voltage, cur­rent, IEPE, charge, strain gauge, Kulite)
  • Sample rates up to 51.2 kHz

 More In­form­a­tion

Eingangskarte IfTA AD32

AD32

  • 32 ana­log in­puts for slower pro­cesses e.g. op­er­at­ing data such as tem­per­at­ure
  • Sample rates up to 50 Hz

More In­form­a­tion

AT2 High speed Timer

AT2

  • 2 fast, highly flex­ible timer in­puts
  • Trig­ger­ing of ana­log sig­nals
  • 10 ns time res­ol­u­tion and 102,4 kHz pulse rate

More In­form­a­tion

Eingangskarte IfTA DigIn16

DigIn16

  • 16 di­git­al in­puts
  • Samp­ling rate up to 50 Hz
  • Ex­tern­al NO con­tact or source

More In­form­a­tion

Sig­nal Ac­quis­i­tion

AD4

  • Over­view
  • Tech­nic­al Spe­cific­a­tions
  • Op­tions
  • Examples of Ap­plic­a­tion

High­lights

  • Mod­ule with 4 syn­chron­ous ana­log input chan­nels
  • Samp­ling rate of up to 102.4 kHz with 24-bit res­ol­u­tion for fast and pre­cise sig­nal ac­quis­i­tion
  • Dir­ect meas­ure­ment of voltages and cur­rent sig­nals
  • Independ­ent gal­van­ic­ally isol­ated in­puts, up to 100 VDC to ground and up to 200 VDC between chan­nels

Ad­vant­ages of the AD$ input card

  • Cost-ef­fect­ive entry-level card
  • Out­stand­ing cal­ib­ra­tion

gen­er­al

Num­ber of chan­nels:4
Samp­ling rate:Max. 102.4 kHz (syn­chron­ous per sys­tem)
Ali­asing-fil­ter:In­teg­rated (di­git­al FIR fil­ter, corner fre­quency ad­just­ment auto­mat­ic­ally ac­cord­ing to sampling rate)
Bit res­ol­u­tion: 24-bit
Gal­van­ic isol­a­tion:  Up to 100 VDC to ground and up to 200 VDC between chan­nels
Input fil­ter:Switch­able AC/DC coup­ling
Weight:185 g

cur­rent input

Input im­ped­ance:100 Ω
Switch­able input range:±25 mA, ±44 mA rms (or­der­ing op­tion)
Sig­n­al-to-noise ratio: Max. 145 dB at 1kHz
High pass fil­ter:3 dB at 0.036 Hz

Voltage input

Input im­ped­ance:1MΩ, 15 pF
Switch­able input range:±2.5 V, ±25 V
Sig­nal-to-noise ratio: Max. 145 dB at 1kHz
High pass fil­ter:3 dB at 0,036 Hz

Sig­nal con­nect­ors

  • Stand­ard front feed with 37-pin Sub-D con­nect­or
  • Avail­able with op­tion­al BNC (f) in­stead of clamps
  • Other types of con­nect­ors avail­able upon re­quest

sta­tion­ary in­stall­a­tions

The eco­nom­ic­al AD4 is primar­ily used in sta­tion­ary in­stalled in­dus­tri­al ma­chinery. Meas­ure­ment sig­nals from ex­tern­al pre-amp­li­fi­ers or sig­nal con­vert­ers can be con­nec­ted to the AD4 either as voltage sig­nals or as cur­rent sig­nals. Like­wise, com­mon in­dus­tri­al stand­ard sig­nals can be ap­plied dir­ectly via the con­trol sys­tem (±10 V, 0-10 V, 4-20 mA, etc.).

Ser­vice

Thanks to the flex­ible push-in con­nect­ors, in­stall­a­tion cables can be laid dir­ectly or with wire end sleeves, without the need for time-con­sum­ing con­nect­or as­sembly.

Test Benches

The AD4 is also suit­able for test benches, e.g. if cus­tom-made or exot­ic pre-amp­li­fi­ers have already been in­stalled for sensors, or if the sensor is already dir­ectly sup­ply­ing a voltage or cur­rent sig­nal.

Sig­nal Ac­quis­i­tion

AD4IEPE

  • Over­view
  • Tech­nic­al Spe­cific­a­tions
  • Op­tions
  • Examples of Ap­plic­a­tions

High­lights

  • Mod­ule with 4 syn­chron­ous ana­log in­puts
  • 102.4 kHz sampling rate with 24-bit res­ol­u­tion for fast and pre­cise sig­nal cap­ture
  • Meas­ure voltage and cur­rent dir­ectly
  • Independ­ent gal­van­ic­ally isol­ated in­­puts, up to 100 VDC to ground and up to 200 VDC between chan­nels
  • 12 mA IEPE power sup­ply. IEPE is an in­dustry stand­ard also known under: ICP©, CCLD©, IsoTron© or DeltaTron©

Ad­vant­ages of the AD4IEPE input card

  • Cost-ef­fect­ive input card
  • Out­stand­ing cal­ib­ra­tion
  • Power­ful IEPE source
  • Suit­able sup­ply unit for IfTA charge amp­li­fi­ers es­pe­cially with Ex nA

gen­er­al

Num­ber of chan­nels:4
Samp­ling rate:Max. 102.4 kHz (syn­chron­ous per sys­tem)
Ali­asing-fil­ter:In­teg­rated (di­git­al FIR fil­ter, corner fre­quency ad­just­ment auto­mat­ic­ally ac­cord­ing to sampling rate)
Bit res­ol­u­tion: 24-bit
Gal­van­ic isol­a­tion:  Up to 100 VDC to ground and up to 200 VDC between chan­nels
IEPE Sup­ply:12 mA at max. 28 V
Input fil­ter:Switch­able AC/DC coup­ling
Weight:250 g

cur­rent input

Input im­ped­ance:100 Ω
Switch­able input range:±25 mA, ±44 mA rms
Sig­nal-to-noise ratio: Max. 145 dB at 1kHz
High pass fil­ter:3 dB at 0,036 Hz

Voltage input

Input im­ped­ance:1MΩ, 15 pF
Switch­able input range: ±2.5 V, ±25 V
Sig­nal-to-noise ratio: Max. 145 dB at 1kHz
High pass fil­ter:3 dB at 0,036 Hz

Sig­nal con­nect­ors

  • Stand­ard 12-pin con­nect­or with push-In spring clamps
  • Avail­able with op­tion­al BNC (f) in­stead of clamps
  • Other types of con­nect­ors avail­able upon re­quest

Suit­able Products

Sta­tion­ary In­stall­a­tions

The AD4 and AD4IEPE are primar­ily used in per­man­ently in­stalled in­dus­tri­al ma­chinery. The AD4IEPE of­fers all the fea­tures of the AD4 for stand­ard sig­nals (±10 V, 0-10 V, 4-20 mA, etc.) with the ad­di­tion of a switch­able IEPE sup­ply on each chan­nel.

Espe­cially when there are large dis­tances between the con­trol room and the meas­ur­ing site, gal­van­ic isol­a­tion is re­quired - not only for the de­sired sig­nal, but also for the voltage sup­ply of the sensor or charge amp­li­fi­er. IEPE tech­no­logy in­cor­por­ates both into a single 2-wire cable. Espe­cially in ap­plic­a­tions with large num­bers of meas­ur­ing sites, IEPE enorm­ously sim­pli­fies the in­stall­a­tion ef­fort and meas­ure­ment setup.

This stand­ard is ap­plied to sensors such as ac­cel­er­a­tion, force and pres­sure sensors or mi­cro­phones and dif­fers in its des­ig­na­tion de­pend­ing on the man­u­fac­turer.

ICP© (in­teg­rated cir­cuit piezo­elec­tric), CCLD© (con­stant-cur­rent line-drive), IsoTron© or DeltaTron© are some ex­amples.

Ser­­vice

Thanks to the flex­ible push-in con­nect­ors, in­stall­a­tion cables can be laid dir­ectly or with wire end sleeves, without the need for time-con­sum­ing con­nect­or as­sembly.

Test benches

The AD4IEPE is also re­com­men­ded for test benches, since gal­van­ic isol­a­tion of the power sup­ply from pre-amp­li­fi­ers or sensors is also ad­vant­age­ous for them: With 2-wire cables, the wir­ing ef­fort per meas­ur­ing site is ex­tremely low, mak­ing wir­ing easy to man­age and there­fore less prone to er­rors.

Sig­nal Ac­quis­i­tion

AD4Pro

  • Over­view
  • Tech­nic­al spe­cific­a­tions
  • Op­tions
  • Examples of ap­plic­a­tion

High­lights

  • Mod­ule with 4 ana­log FleXense in­puts.
  • 102.4 KHz sampling rate with 24-bit res­ol­u­tion for fast and pre­cise sig­nal cap­ture.
  • Meas­ure voltage, cur­rent, charge and strain gauges dir­ectly.
  • Independ­ent gal­van­ic­ally isol­ated in­­puts up to ±250 volts.
  • Syn­chron­ous sampling of in­puts.
  • Switch­able pre-amp­li­fic­a­tion for high­er res­ol­u­tion.
  • Switch­able 10 mA IEPE power sup­ply. IEPE is an in­dustry stand­ard also known under: ICP©, CCLD©, IsoTron© or DeltaTron©.

Ad­vant­ages of FleXense tech­no­logy

  • Flex­ib­il­ity
    FleXense unites meas­ure­ment of voltage and cur­rent sig­nals, charge amp­li­fic­a­tion, pre-amp­li­fic­a­tion and (Wheat­stone) bridge cir­cuits for strain gauges and Kulites, and also provides IEPE-power sup­ply for every input. A graph­ic­al user in­ter­face makes se­lect­ing the input mode for each chan­nel easy.
  • Lean meas­ure­ment chain
    FleXense tech­no­logy makes fur­ther ex­tern­al com­pon­ents need­less and avoids er­rors.
  • Sig­nal qual­ity
    High-tem­per­at­ure sensors (for pres­sure and ac­cel­er­a­tion) es­pe­cially be­ne­fit from the in­teg­rated dif­fer­en­tial charge amp­li­fi­er, which also of­fers max­im­um sig­nal qual­ity. 

Gen­er­al

Num­ber of chan­nels:4
Samp­ling rate:Max. 102.4 kHz (syn­chron­ous per sys­tem)
Ali­asing fil­ter: In­teg­rated (di­git­al FIR fil­ter, corner fre­quency ad­just­ment auto­mat­ic­ally ac­cord­ing to sampling rate)
Bit res­ol­u­tion:24-bit
IEPE sup­ply:10 mA at max. 28 V
Gal­van­ic isol­a­tion: Up to 100 VDC to ground and up to 200 VDC between chan­nels
Input fil­ter:Switch­able AC/DC coup­ling
Weight: 270 g

In­teg­rated charge amp­li­fi­er

Input modes:Single-ended and dif­fer­en­tial
Valid input ranges:±200 pC, ±2000 pC
Sig­nal-to-noise ratio: Max. 137 dB at 1 kHz
Spe­cial fea­ture: Com­pens­a­tion of ther­mo­elec­tric voltages (See­back ef­fect) and Pop­p­corn ef­fect with high-tem­per­at­ure sensors

cur­rent input

Input im­ped­ance:100 Ω
Switch­able input range:±25 mA, ±44 mA rms
Sig­nal-to-noise ratio: Max. 145 dB at 1kHz
High pass fil­ter:3 dB at 0,036 Hz

Voltage input

Input im­ped­ance:1MΩ, 15 pF
Switch­able input range: ±2.5 V, ±25 V
Sig­nal-to-noise ratio: Max. 145 dB at 1kHz
High pass fil­ter:3 dB at 0,036 Hz

Strain gauges or kulites

Sup­por­ted types: Full, half and quarter bridge
Sup­ply cur­rent:10 mA at max. 5 V
Valid input areas:±5 mV, ±50 mV
Sig­nal-to-noise ratio:Max. 130 dB at 1kHz

Sig­nal con­nect­ors

  • Stand­ard 24-pin con­nect­or with Push-In spring clamps
  • Other types of con­nect­ors avail­able upon re­quest

Test­ing

The Siemens Clean En­ergy Center for Burn­er Tests in Gas Tur­bines in Ber­lin is using the AD4Pro to sig­ni­fic­antly re­duce com­plex­ity in their meas­ure­ment chain, thereby mak­ing fast and error-free con­fig­ur­a­tion changes easy.

Ser­vice

Ser­vice en­gin­eers are con­fron­ted with meas­ur­ing tasks that change on a daily basis. With the AD4Pro you are pre­pared for any type of sensor, without hav­ing to carry ad­di­tion­al ex­tern­al amp­li­fi­ers. In­teg­rated amp­li­fi­ers make sensor changes easy.

Re­search

Thanks to the in­teg­rated amp­li­fi­er, the sig­nal qual­ity is un­beat­able. That is why the Chair of Turbo-ma­chinery and Flight Propul­sion at the  Tech­nic­al University of Mu­nich re­lies on the AD4Pro for its com­pressor test bench.

    Sig­nal ac­quis­i­tion

    AD32

    • Over­view
    • Tech­nic­al spe­cific­a­tions
    • Op­tions
    • Examples of ap­plic­a­tion

    High­lights

    • Mod­ule with 32 asyn­chron­ous ana­log in­puts
    • Samp­ling rate up to with 16-bit res­ol­u­tion
    • Meas­ure voltages and cur­rent sig­nals dir­ectly
    • Tem­per­at­ure con­trol
    • Surge pro­tec­tion

    Ad­vant­ages of the AD32 input card

    • Per­fect for re­cord­ing op­er­at­ing data, such as tem­per­at­ure, etc.
    • Cost-ef­fect­ive al­tern­at­ive to the AD4 mod­ule

    gen­er­al

    Num­ber of chan­nels:32
    Samp­ling rate:Max. 640 Hz (syn­chron­ous per sys­tem)
    Ali­asing-fil­ter:In­teg­rated (di­git­al FIR fil­ter, corner fre­quency ad­just­ment auto­mat­ic­ally ac­cord­ing to sampling rate)
    Bit res­ol­u­tion: 16-bit
    Gal­van­ic isol­a­tion:  Card to ground
    Weight:195 g

    cur­rent input

    Input im­ped­ance:500 Ω
    Switch­able input range:±5 mA, ±10 mA, ±20 mA (or­der­ing op­tions)

    Voltage input

    Input im­ped­ance:1MΩ, 60 pF
    Switch­able input range:±2.5 V, ±5 V, ±10 V, ±25 V (or­der­ing op­tions)

    Order op­tions:

    • Stand­ard front feed with 37-pin Sub-D con­nect­or
    • One of the fol­low­ing vari­ants must be se­lec­ted:
      • Cur­rent ±5 mA
      • Cur­rent ±10 mA
      • Cur­rent ±20 mA
      • Voltage ±2.5 V
      • Voltage ±5 V
      • Voltage ±10 V
      • Voltage ±25 V

    Ideal for the cost-ef­fect­ive re­cord­ing and mon­it­or­ing of op­er­a­tion­al data and other slow-chan­ging sig­nals such as, e.g.:

    • Tem­per­at­ures
    • Flow rates
    • Rota­tion­al speeds
    • Sup­ply voltages

    The IfTA sys­tem can react to meas­ured val­ues for these in­puts as well as to val­ues of other mod­ules, so, for ex­ample, those with auto­mat­ic trig­ger­ing or re­ac­tions via out­put mod­ules.

    Sig­nal ac­quis­i­tion

    AT2

    • Over­view
    • Tech­nic­al spe­cific­a­tions
    • Op­tions
    • Examples of ap­plic­a­tion

    High­lights

    • Flex­ible and fast timer mod­ule with two ana­log in­puts
    • Op­tim­ized for dif­fer­en­tial input sig­nals
    • En­ables tor­sion­al vi­bra­tion ana­lys­is in real time
    • Highly ac­cur­ate time re­cord­ing of im­pulses
    • Independ­ent gal­van­ic­ally isol­ated in­­puts up to ±250 Volt
    • Freely ad­justable trig­ger thresholds and hys­ter­esis
    • Status and trig­ger LEDs
    • Win­ner of the 2017 Messtec + Sensor Masters Award

    Ad­vant­ages of the AT2

    • Dir­ect input of ana­log sig­nals
      High-im­ped­ance in­tern­al TTL con­ver­sion en­ables the dir­ect con­nec­tion of pulse-gen­er­at­ing sensors (e.g. hall probes, pho­to­di­odes, in­duct­ive dis­tance sensors etc.) without ex­tern­al sig­nal con­di­tion­ing.
    • Nano­second res­ol­u­tion
      The high-pre­ci­sion elec­tron­ics re­cord pulse times quickly and pre­cisely, thus en­abling the pre­cise meas­ure­ment of the amp­litudes of tor­sion­al vi­bra­tions. 
    • Long-term data stor­age and sys­tem pro­tec­tion
      The IfTA plat­form en­ables con­tinu­ous or triggered long-term data re­cord­ing and re­ac­tion to tor­sion­al vi­bra­tion events in real time to pro­tect, for ex­ample, your plant or ma­chinery.

    Gen­er­al

    Num­ber of input chan­nels: 2
    Samp­ling rate:10 nS bei 100 MHz
    Max­im­um im­pulse rate:102,4 kHz
    Gal­van­ic isol­a­­tion:  Up to 150 VDC to ground and up to 300 VDC between chan­nels
    Weight:270 g

    input chan­nel

    Input im­ped­ance:130 kΩ
    Max. input im­ped­ance±30 V
    Max. Dif­fer­en­tial input voltage:±60 V
    Ad­justable trig­ger:±25 V
    Trig­ger res­ol­u­tion:12-bit
    Res­ol­u­tion Hys­ter­esis:12-bit
    An­a­log band­width:20 MHz
    Min­im­um pulse width:25 ns

    TTL Out­put

    Out­put voltage:0...5 V
    Max. out­put cur­rent:15 mA
    Delay:20 ns typ­ic­al
    Max. slew rate:100 V/ns

    Status LED

    Input via trig­ger:yel­low
    Input under trig­ger:blue
    Fast sig­nal:white

    sig­nal con­nect­or

    •  Stand­ard sig­nal input Lemo con­nect­or
    • TTL out­put with BNC-f (fe­male)
    • Op­tion­al with 10 pole ter­min­al strip

    ap­plic­a­tion ex­amples

    • Mon­it­or­ing of tor­sion­al vi­bra­tions on turbo sets
    • In­vest­ig­a­tion of tor­sion­al vi­bra­tions in drive trains
    • Meas­ure­ment of the p-V dia­gram of com­pressors or en­gine in­dex­ing

    Sig­nal ac­quis­i­tion

    DigIn16

    • Over­view
    • Tech­nic­al spe­cific­a­tions
    • Op­tions
    • Examples of ap­plic­a­tions

    High­lights

    • Mod­ule with 16 di­git­al in­puts
    • Independ­ent gal­van­ic­ally isol­ated in­­puts up to ±250 Volt
    • Ex­tern­al N.O. con­tact or ex­tern­al voltage switch­able per chan­nel
    • Tem­per­at­ure con­trol

    Gen­er­al

    Num­ber of input chan­nels: 16
    Samp­ling rate: 10 ... 25 Hz typ­ic­al
    Gal­van­ic isol­a­tion:  Between chan­nels
    Weight:125 g

    Input with ex­tern­al voltage

    Input voltage:0 ... 26 VDC
    Lo­gic­ally low:0 ... 1,5 VDC
    Lo­gisch High:4 ... 26 VDC
    Input im­ped­ance:100 kΩ

    Input with ex­tern­al NO con­tact

    Switch­ing voltage:5 V
    Out­put im­ped­ance:1 kΩ
    Short-cir­cuit cur­rent5 mA

    Sig­nal Con­nect­ors

    • Stand­ard 32-pin con­nect­or with Push-In spring clamps
    • Other types of con­nect­ors avail­able upon re­quest

    Examples of Ap­plic­a­tion

    • Re­cord­ing of ex­tern­al status sig­nals to mon­it­or pro­ced­ures on the test bench
    • Can be used for simple voltage mon­it­or­ing (e.g. with sup­ply to pre-amp­li­fi­er switched on)
    • Can be used with IfTA sys­tems for triggered stor­age, e.g. for long-term tests