mAs Measurement
The 90M9 mAs sensor is a ground-isolated invasive sensor (requires connection to an ACCU-PRO™ Analyzer, 9095, 4085D+ or the ACCU-kV® Analyzer system) that connects to the x-ray generator and works in conjunction with the kV system. The sensor measures and stores an mA value for each kV sample and computes average mA and mAs. The average values are displayed in the kV modes. The mA waveform is available over the 9095’s RS-232 connection.
FEATURES
Automatic zero.
Measurement synchronized to kV waveform.
No range switching.
Measures absolute value (no rectifier drop and optimum noise rejection)
up to 720 Hz (12-pulse 60-Hz x-ray generator).
mA-waveform available to an external PC using XLPRO-9095 software.
2.33-kHz -3-dB bandwidth. Response at 720 Hz is down 2.5%.
| 90M9
mAs Sensor |
|
| Full-scale: | 2000 mA or 9999 mAs. |
| mA accuracy: | 0.2% of reading at dc plus resolution of +/-0.015 mA or 3-4 digits. Absolute value of bi-polar waveform is accurate to 2.5% at 720 Hz. |
| mAs accuracy (1-s pulse): | 5 µAs or 0.2% of reading; resolution of 0.001 mAs. |
| Input impedance: | Fixed, resistive, 1.7 - 2.7 ohms. 1 ohm sense resistor plus fuse and wiring. |
| Input protection: | 2-A fuse. Over-voltage protection using 22-J varistor before the fuse and 17-V Zener diodes after the fuse. |
| Bandwidth: | 2.33 kHz, -3 dB. |
| ON/OFF: | controlled from 9095 control unit. (ON only when a kV function is active.) |
| Battery: | 9 volt, lifetime is approximately 50 operating hours. |
 |
 |
 |
