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Comment: Updated HVI channels to indicate the non-useful ones

4-20mA Sensor Tables

Part No.

Variant Description

Quantity

Quantity Description

Value @ 4mA

Value @ 20mA

Units

Suggested AoC

VTI21-VT1AC Vane Relay VariantTorqueInstantaneous Torque Exerted on the relay vane.0+25m.Nm0.2 m.Nm
VTI21-HVIHVI Receiver VariantAverage CurrentAverage HVI Pulsed Current seen by the VTI21 from input channel 1.0600mA15 mA
VTI21-TI21-TXTI21 / EbiTrack 200 Variant (TX)Average CurrentAverage of upper and lower sideband current from VTI21 input channel 1.01500mA5 5A0.05 A
VTI21-TI21-TXTI21 / EbiTrack 200 Variant (RX)Average CurrentAverage of upper and lower sideband current from VTI21 input channel 1.0200mA2 mA
VTI21-FS25FS2500 Receiver VariantCenter CurrentAmplitude of the FS2500 center frequency current from VTI21 input channel 1.01500mA5 mA
VTI21-FS26FS2600 Receiver VariantCenter CurrentAmplitude of the FS2500 center frequency current from VTI21 input channel 1.01500mA5 mA
VTI21-ACSGeneral Purpose AC sensing up to 20A 25A RMSCurrentRMS current from VTI21 input channel 1.02025A0.2 A
VTI21-UM71UM71 VariantCurrentCurrent at selected center frequency from VTi21 input channel 1.05000µA100µA
VTI21-ASTERAster VariantCurrentCurrent at selected center frequency from VTi21 input channel 1.05000µA100µA
VTI21-REEDReed Relay VariantCurrentCurrent measured across the Reed relay frequency range on input channel 1.05000mA100mA25mA
VTI21-RFDMReed Relay FDM variantn/anone



...

VTI21-TI21 / VTI21-FS25 / VTI21-FS26

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

1






1

Center FrequencyThe Center frequency, in hertz, of the track circuit.388.8 to 508.8Hz1 Hz
2
1
Center frequency CurrentTotal RMS current at the target center frequency0 to 1000mA5 mA
3
1
Lower Side Band currentTotal RMS current at the target lower side band frequency0 to 1000mA5 mA
4
1
Upper Side Band currentTotal RMS current at the target upper side band frequency0 to 1000mA5 mA
5
1
In Band CurrentTotal RMS current seen by the transducer between 300 to 600 Hz0 to 1000mA5 mA
6
1

Spectrogram

or Gain

Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram.

When spectrum data is not being acquired, this channel shows the current amplifier gain setting

4.8 to 1228.8HzNA
7
1
Loudest FrequencyThe strongest frequency, in hertz, observed in the incoming waveform.4.8 to 1228.8Hz1 Hz
8
1
Total CurrentTotal RMS current seen by the transducer.0 to 1000mA5 mA
9





2

Center FrequencyThe Center frequency, in hertz, of the track circuit.388.8 to 508.8Hz1 Hz
10
2
Center frequency CurrentTotal RMS current at the target center frequency0 to 1000mA5 mA
11
2
Lower Side Band currentTotal RMS current at the target lower side band frequency0 to 1000mA5 mA
12
2
Upper Side Band currentTotal RMS current at the target upper side band frequency0 to 1000mA5 mA
13
2
In Band CurrentTotal RMS current seen by the transducer between 300 to 600 Hz0 to 1000mA5 mA
14
2

Spectrogram

or Gain

Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram.

When spectrum data is not being acquired, this channel shows the current amplifier gain setting

4.8 to 1228.8HzNA
15
2
Loudest FrequencyThe strongest frequency, in hertz, observed in the incoming waveform.4.8 to 1228.8Hz1 Hz
16
2
Total CurrentTotal RMS current seen by the transducer.0 to 1000mA5 mA

VTI21-HVI

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

1 - ANA





1


HVI
Current
Frequency
RMS Current of the pulsed waveform
The frequency of pulses0 to
1500
5
mA15 mA
Hz0.1 Hz
2 - ANA
1
HVI
Frequency
Current
The frequency of pulses
RMS Current of the pulsed waveform0 to
5
1500
Hz0.1 Hz
mA5 mA
3 - ANA
1
Noise CurrentThe RMS current observed between pulses.0 to 1500mA
15
5 mA
4 -
ANA1Pulse WaveformIf this channel is requested as a capture, the VTi21 will return a high-resolution waveform of the last observed pulse0 to 1500mATriggered Capture1 - DIG1Pulse
DIGPulse ConflictSet TRUE if pulses are observed to be bleeding through from adjacent track sectionsDigital
NA
N/AOn Change
5 - ANA
2HVI CurrentRMS Current of the pulsed waveform0 to 1500mA15 mA
Rejection RateProportion of pulses deemed not to be genuine HVI pulses0 to 100%Don't push to server - for diagnostic use by Mpec only
6 - ANA
2HVI FrequencyThe frequency of pulses0 to 5Hz0.1 Hz
Rejection ReasonBitfield encoding the reason a pulse was not accepted.8 bitsN/A
7- ANA
2Noise CurrentThe RMS current observed between pulses.0 to 1500mA15 mA
SensitivityThreshold used to identify pulse events0 to 2621440N/A
8 - ANA
2
Pulse WaveformIf this channel is requested as a capture, the VTi21 will return a high-resolution waveform of the last observed pulse0 to 1500mATriggered Capture
2
9 -
DIG
ANA






2

Pulse ConflictSet TRUE if pulses are observed to be bleeding through from adjacent track sectionsDigitalNAOn Change

VTI21-ACS-001

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

11CH 1 CurrentRMS current observed on Channel 10 to 2500
HVI FrequencyThe frequency of pulses0 to 5Hz0.1 Hz
10 - ANAHVI CurrentRMS Current of the pulsed waveform0 to 1500mA5 mA
11 - ANANoise CurrentThe RMS current observed between pulses.0 to 1500mA5 mA
22CH 2 CurrentRMS current observed on Channel 20 to 2500mA5 mA3NADerived CurrentRMS current derived for an unmonitored 3rd phase in a balanced three-phase system.0 to 2500mA5 mA4NACH1 Leads CH2Digital Output - TRUE if the waveform on CH1 is observed to lead that of CH2TRUE or FALSENANA5NACH1 Lags CH2Digital Output - TRUE if the waveform on CH1 is observed to lag that of CH2TRUE or FALSENANA

...

12 - DIGPulse ConflictSet TRUE if pulses are observed to be bleeding through from adjacent track sectionsDigitalN/AOn Change
13 - ANARejection RateProportion of pulses deemed not to be genuine HVI pulses0 to 100%Don't push to server - for diagnostic use by Mpec only
14 - ANARejection ReasonBitfield encoding the reason a pulse was not accepted.8 bitsN/A
15 - ANASensitivityThreshold used to identify pulse events0 to 2621440N/A
16 - ANAPulse WaveformIf this channel is requested as a capture, the VTi21 will return a high-resolution waveform of the last observed pulse0 to 1500mATriggered Capture


VTI21-ACS

2 20NA

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

1

1

CH 1 CurrentRMS current observed on Channel 1 (output at 100 Hz, low pass filtered with cutoff of 9 Hz)0 to 2025A0.2 A2
2CH 1 Average CurrentRMS current observed on Channel 20 to 20A0.2 A3NADerived CurrentRMS current derived for an unmonitored 3rd phase in a balanced three-phase systemAverage RMS current observed on Channel 1, over one second period.0 to 25A0.2 A
43NACH1 Leads CH2Digital Output - TRUE if the waveform on CH1 is observed to lead that of CH2TRUE or FALSENANA5NACH1 Lags CH2Digital Output - TRUE if the waveform on CH1 is observed to lag that of CH2TRUE or FALSENA2CH 2 Current

RMS current observed on Channel 2 (output at 100 Hz, low pass filtered with cutoff of 9 Hz)

0 to 25A0.2 A
4CH 2 Average CurrentAverage RMS current observed on Channel 2, over one second period.0 to 25A0.2 A

VTI21-UM71

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

1








1

CH 1 FrequencyChannel 1 Frequency Selected1700 to 2600Hz1
21CH 1 Side Band RatioRatio of lower to upper frequency (0%=all lower, 100%=all upper)0 to 100%%5
31CH 1 Raw FrequencySimple Frequency Measurement (zero crossings)1600 to 2700Hz100
41CH 1 Total CurrentTotal current in the UM71 band0 to 5mAµA100
51CH 1 current 1700HzCurrent measured at 1700Hz0 to 5mAµA100
61CH 1 current 2000HzCurrent measured at 2000Hz0 to 5mAµA100
71CH 1 current 2300HzCurrent measured at 2300Hz0 to 5mAµA100
81CH 1 current 2600HzCurrent measured at 2600Hz0 to 5mAµA100
91

CH 1 Spectrogram or Gain

Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram.

1 to 32
1
10








2

CH 2 FrequencyChannel 1 Frequency Selected1700 to 2600Hz1
112CH 2 Side Band RatioRatio of lower to upper frequency (0%=all lower, 100%=all upper)0 to 100%%5
122CH 2 Raw FrequencySimple Frequency Measurement (zero crossings)1600 to 2700Hz100
132CH 2 Total CurrentTotal current in the UM71 band0 to 5mAµA100
142CH 2 current 1700HzCurrent measured at 1700Hz0 to 5mAµA100
152CH 2 current 2000HzCurrent measured at 2000Hz0 to 5mAµA100
162CH 2 current 2300HzCurrent measured at 2300Hz0 to 5mAµA100
172CH 2 current 2600HzCurrent measured at 2600Hz0 to 5mAµA100
182

CH 2 Spectrogram or Gain

Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram.

1 to 32
1

...

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

1










1

CH 1 FrequencySimple Frequency Measurement (zero crossings)0 to 5000Hz1
21CH 1 Total CurrentTotal current measured in the reed relay frequency range0 to 5A0 to 5000mA5010
31

CH 1 - channel 211

Total Current at 363Hz

0 to 5A0 to 5000mA5010
41

CH 1 - channel 212

Total Current at 366Hz

0 to 5A0 to 5000mA5010
51

CH 1 - channel 213

Total Current at 369Hz

0 to 5A

0 to 5000mA5010
61

CH 1 - channel 214

Total Current at 372Hz

0 to 5A0 to 5000mA5010
71

CH 1 - channel 215

Total Current at 375Hz

0 to 5A0 to 5000mA5010
81

CH 1 - channel 216

Total Current at 378Hz

0 to 5A0 to 5000mA5010
91

CH 1 - channel 217

Total Current at 381Hz

0 to 5A0 to 5000mA5010
101

CH 1 - channel 218

Total Current at 384Hz

0 to 5A0 to 5000mA5010
111CH 1 - spectrogram / gain

Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. note: includes only measured frequencies, which are: 363, 366, 369, 372, 375, 378, 381, 384, 408, 417, 423Hz




12











2

CH 2 FrequencySimple Frequency Measurement (zero crossings)0 to 5000Hz1
132CH 2 Total CurrentTotal current measured in the reed relay frequency range0 to 5A0 to 5000mA5010
142

CH 2 - channel 211

Total Current at 363Hz

0 to 5A0 to 5000mA5010
152

CH 2 - channel 212

Total Current at 366Hz

0 to 5A0 to 5000mA5010
162

CH 2 - channel 213

Total Current at 369Hz

0 to 5A0 to 5000mA5010
172

CH 2 - channel 214

Total Current at 372Hz

0 to 5A0 to 5000mA5010
182

CH 2 - channel 215

Total Current at 375Hz

0 to 5A0 to 5000mA5010
192

CH 2 - channel 216

Total Current at 378Hz

0 to 5A0 to 5000mA5010
202

CH 2 - channel 217

Total Current at 381Hz

0 to 5A0 to 5000mA5010
212

CH 2 - channel 218

Total Current at 384Hz

0 to 5A0 to 5000mA5010
222CH 2 - spectrogram / gain

Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. note: includes only measured frequencies, which are: 363, 366, 369, 372, 375, 378, 381, 384, 408, 417, 423Hz




...

Slave ChannelVTI21 Input ChannelQuantityDescriptionTypical RangeUnitsSuggested AoC Threshold
1










1

Lock-on Frequency Ideal operating frequency track circuit1700 to 2600Hz1
21In-band CurrentRMS current in the operating band0-5000uA50
31Principle FrequencyLoudest frequency observed (actual operating frequency)1700 to 2600Hz1
41Total Currentbroad-and RMS current0-5000uA50
511700 Hz Band CurrentRMS current in the 1700 Hz band0-5000uA50
612000 Hz Band CurrentRMS current in the 1900 Hz band0-5000uA50
712300 Hz Band CurrentRMS current in the 2100 Hz band0-5000uA50
812600 Hz Band CurrentRMS current in the 2300 Hz band0-5000uA50
91Gain / FFTPre-amp Gain as AoC, Spectrogram is acquired as a triggered capture10HzNA
10











2

Lock-on Frequency Ideal operating frequency track circuit1700 to 2600Hz1
112In-band CurrentRMS current in the operating band0-5000uA50
122Principle FrequencyLoudest frequency observed (actual operating frequency)1700 to 2600Hz1
132Total Currentbroad-and RMS current0-5000uA50
1421700 Hz Band CurrentRMS current in the 1700 Hz band0-5000uA50
1522000 Hz Band CurrentRMS current in the 1900 Hz band0-5000uA50
1622300 Hz Band CurrentRMS current in the 2100 Hz band0-5000uA50
1722600 Hz Band CurrentRMS current in the 2300 Hz band0-5000uA50
1182Gain / FFTPre-amp Gain as AoC, Spectrogram is acquired as a triggered capture10HzNA

...

note: only one input channel is supported.

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

1










1

FrequencySimple Frequency Measurement (zero crossings)0-1000Hz50
2
1
Total CurrentTotal current measured in the reed relay frequency range0-5AmA100
3
1
FFTFFT for each monitored Channel
HzNA
4
1
channel 4Energy at 803.25Hz0-5AmA100
5
1
channel 16Energy at 702.5Hz0-5AmA100
6
1
channel 17Energy at 697.5Hz0-5AmA100
7
1
channel 19Energy at 687Hz0-5AmA100
8
1
channel 20Energy at 682.5Hz0-5AmA100
9
1
channel 26Energy at 611.75Hz0-5AmA100
10
1
channel 27Energy at 607.75Hz0-5AmA100
11
1
channel 36Energy at 505Hz0-5AmA100
12
1
channel 38Energy at 493.5Hz0-5AmA100
13
1
channel 39Energy at 488Hz0-5AmA100
14
1
channel 47Energy at 419.75Hz0-5AmA100
15
1
channel 48Energy at 410.25Hz0-5AmA100
16
1
channel 83Energy at 446Hz0-5AmA100
17
1
channel 84Energy at 533.75Hz0-5AmA100
18
1
channel 92Energy at 842Hz0-5AmA100