Vibration Research VR9500, Руководство по оборудованию

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VR9500 Hardware Manual 14
Calibration Verification
Calibration verification for the VR9500 should be performed annually. The
recommended sequence for calibration verification is as follows:
1. Run the preliminary verification procedure to verify that the VR9500 arrived at
the calibration lab within the specified 1-year tolerance levels.
2. Run the full verification procedure to verify that the VR9500 is within the
specified 24-hour tolerance levels when it leaves the calibration lab.
Hardware Specifications
·
24-Hour Accuracy: Indicates the VR9500’s relative accuracy over its
measurement range for short time intervals and within a stable environment.
Short-term accuracy is specified for a 24-hour period and a ±2°C temperature
range.
·
1-Year Accuracy: Long-term accuracy specifications valid for a 23°C ±5°C
temperature range. Include the initial calibration errors and the VR9500’s long-
term drift errors.
·
Temperature Coefficients: Accuracy is specified for a calibration
temperature ±5°C temperature range. This is a common temperature range for
many operating environments. You must add additional temperature coefficient
errors to the accuracy specification if operating the VR9500 outside a 23°C
±5°C temperature range.
Terminal Specifications
·
Analog Inputs 1 to 4: General purpose analog inputs typically used to
measure mV accelerometer signals. The four inputs are functionally identical
with user-selectable ranges of ±1V, ±10V and ±20V and a configurable
constant current power source for accelerometers. Each input can be
individually configured for single ended or differential modes and with or without
capacitor coupling.
·
Drive Output: The Drive output is dedicated to drive an amplifier or servo-
hydraulic valve controller. The output has a user-selectable range of ±1V or
±10V.
·
COLA/AUX Output: The COLA/AUX output is dedicated to trigger a strobe or
other external equipment. The output has a user-selectable range of ±1V or
±10V. It is also used as an analog output in special purpose applications.