Vibration Comparator Frequently Asked Questions

Question number FAQ-1392

About Voltage Output (THR, AC, DC)

The voltage output of VC has three types: THR, AC, and DC, and they are output simultaneously.
THR and AC outputs can be used as analysis signals such as for FFT analyzers, while DC output can be used as recorder output.

Voltage output	Back panel terminal block	output voltage
THR	No.10： + No.11：COM	For the input signal, the gain of "THRGAIN" displayed in the COND MONI menu below is amplified and output. This gain is automatically determined by the input range and SENS sensitivity setting, and cannot be changed arbitrarily. (This is a signal output that does not pass through the bandpass.) (Example) When using an acceleration sensor of 5 mV/ms^-2; the voltage output will be as follows when the menu display is ×1 or ×5. THR output = 5 mV/ms^-2 (for ×1) THR output = 25 mV/ms^-2 (for ×5) Maximum output voltage ±5 V
AC	No.14： + No.15：COM	Select one from band A, B, or C. Output a band-limited AC signal from that band. The bar indicator outputs a full-scale value of ±100% (= ±5V). The maximum output voltage is ±5V.
DC	No.12： + No.13：COM	The device converts the band-limited AC signal displayed in bands A, B (or C) into a DC output. If integration is ON, it outputs the integrated signal. The bar indicator outputs values from 0 to full scale (when the scale is ×1) as 0 to +100% (= 0 to +5V). The maximum output voltage is +5V. When the current output option VC-0253 is installed, the 'DC' terminal will become a current output. It converts 0 to 5 V into 4 mA to 20 mA for current output.

Voltage output

Back panel terminal block

output voltage

THR

No.10： +
No.11：COM

For the input signal, the gain of "THRGAIN" displayed in the COND MONI menu below is amplified and output. This gain is automatically determined by the input range and SENS sensitivity setting, and cannot be changed arbitrarily.
(This is a signal output that does not pass through the bandpass.)

(Example) When using an acceleration sensor of 5 mV/ms^-2;
the voltage output will be as follows when the menu display is ×1 or ×5.

THR output = 5 mV/ms^-2 (for ×1)
THR output = 25 mV/ms^-2 (for ×5)

Maximum output voltage ±5 V

No.14： +
No.15：COM

Select one from band A, B, or C. Output a band-limited AC signal from that band.

The bar indicator outputs a full-scale value of ±100% (= ±5V). The maximum output voltage is ±5V.

No.12： +
No.13：COM

The device converts the band-limited AC signal displayed in bands A, B (or C) into a DC output. If integration is ON, it outputs the integrated signal.

The bar indicator outputs values from 0 to full scale (when the scale is ×1) as 0 to +100% (= 0 to +5V). The maximum output voltage is +5V.

When the current output option VC-0253 is installed, the 'DC' terminal will become a current output. It converts 0 to 5 V into 4 mA to 20 mA for current output.

(Note) Even when the display scale of the bar indicator is enlarged (such as SCL X2), the full scale is 100% when the enlargement is turned off.

Full scale 100 m/s ²
Acceleration half amplitude 50 m/s ² then

Whether at PEAK or RMS,
the AC output voltage is 2.5 V peak amplitude
and the DC output voltage is 1.76 V
.

■THR output gain check

Press the MENU key to open the CONDITION SET menu,
align the cursor to 8:MONI using the ∧ and ∨ keys (inverted display), then press the ENT key,
to open the COND MONI menu.

1: Please check the multiplier displayed in the THR GAIN section.

■THR, AC, DC output terminals

Last updated date: 2018-03-01