Measuring module KDM25
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Measuring module KDM25 is a component of a measuring unit KDR and is designed to measure output voltage of ICP-sensor in one or several measuring valves. Maximum number of measuring channels – eight.
The module serves for applications which require high quality of digitalization of variable signal with high spectral accuracy of transformation, wide dynamic range and high signal-to-noise ratio. Four module channels are strictly parallel, independent, with no commutation delay between each other.
The module can detect short-circuit failures and one-phase open fault of ICP-sensors directly during the measurement process. Eight channels of AD converter are strictly parallel, independent, with no commutation delay between each other
Specifications
Main technical specifications of KDM25:
| No. | Specification | Meas.unit | Value |
| 1. | Number of measuring channels | - | 8 ICP-sensors communication channels |
| 2. | Maximum conversion frequency of AD converter | kHz | 78 |
| 3. | Minimum conversion frequency of AD converter | Hz | 610 |
| 4. | Synchronism of AD converter channels | - | All 8 module LTR25 channels are strictly synchronic, relative phase shift – minimal. |
| 5. | Voltage measuring range | V | "~5 В" (RMS value of signal variable component without exceeding signal variable component amplitude "±10 В") |
| 6. | Full operating range of signal voltage against AGND | V | From 0 tо +22 |
| 7. | DC value in ICP-sensor circuit with voltage from 0 to 22 В | mA |
10 ±2% (range 10 mА) 2,86 ±2% (range 2,86 mА) |
| 8. | Limits of admissible main reduced (to the range end value) measuring error of AC voltage rms value | % | ±0,1% (for signal frequency range from 25 Hz to 0,43 Fпр) |
