GRAS 90CA-S2 Microphone Calibration System, PXI
Technology
Introduction
The GRAS 90CA-S2 Microphone Calibration System provides for automated and reliable level and frequency response calibration of measurement microphones. The implemented calibration methods conform with these standards:
- IEC Standard 61094
- ANSI S1.10 – 1966 (R1976)
- IEC Standard 60942
- TEDS Standard IEEE 1451.4
The 90CA-S2 is based on National Instruments' PXI architecture: NI PXIe-8101 Embedded Controller, including: National Instruments PXIe1071 4-Slot 3U PXI Express Chassis and PXI cards for Control and Data Acquisition.
Features
- Ready-to-use software and hardware
- Accurate calibration hardware
- Automated and computer-controlled calibration process
- Highly reproducible calibration method
- Pre-installed test parameters for GRAS microphones
- Test conditions easily changable
- Auto-generated, customized documentation to print and archive
Applications
- All types of IEC 61094 standardized 1", 1/2", 1/4", and 1/8" measurement microphones from GRAS and other manufacturers
- GRAS 46xx series standard microphone sets
- GRAS 47xx series flush-mount microphone sets (optional)
- GRAS preamplifiers
- Calibration up to 92 kHz (optional up to 200 kHz)
The system is described in more detail in the Instruction Manual.
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Specifications
| Sensitivity Calibration |
|
|
|
Method |
Pistonphone, class 0 |
|
|
Frequency |
250 Hz |
|
|
Uncertainty |
0.07 dB |
|
| Frequency Calibration | ||
|
Method |
Electrostatic actuator |
|
|
Frequency |
20 to 92 kHz (20 to 200 kHz)* |
|
|
Uncertainty |
0.3 dB |
|
| *With HP34410a (or similar) multimeter, not included. | ||
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Ordering info
Included items
| GRAS HW1002 | PXI: NI PXIe-8821 Embedded Controller, including National Instruments PXIe1071 4-Slot 3U PXI Express Chassis NI Dynamic Signal Acquisition Board PXI-4461, and National Instruments Digital I/O PXI-6509 |
| GRAS SW0013 | National Instruments software Diadem version 2017 (or later), Base Edition |
| GRAS SW0002 | Calibration System Software for 90CA |
| GRAS SW0012 | National Instruments Sound and Vibration Analysis SW Run-Time License 779875-01 |
| For Level Calibration | |
| GRAS AL0017 | Pistonphone Calibration Stand |
| GRAS 42AP | Intelligent Pistonphone, including RS-232 control cable |
| GRAS 26AN | ¼” LEMO Insert Voltage Preamplifier |
| GRAS 26AG | ½” LEMO Insert Voltage Preamplifier |
| For Frequency Calibration | |
| GRAS 26AB | ¼” LEMO Preamplifier with Inline Barrel Adapter AF0008 for ¼” preamplifier and ½” microphone |
| GRAS 26AK | ½” LEMO preamplifier (for use with most non-GRAS microphones) |
| GRAS RA0014 | ½” Electrostatic actuator (includes ¼” microphone adapter RA0017) |
| GRAS AL0010 | Actuator Calibration Stand |
| GRAS AL0021 | Microphone Set Calibration Stand |
| GRAS 14AA | Electrostatic Actuator Amplifier, including 230 V AC power cable |
| For Power, Signal Conditioning and Switching | |
| GRAS 12AQ | 2-Channel CCP/LEMO Power Module with Signal Conditioning and Computer Interface |
| GRAS RA0192 | Control box (no cables included in the box) |
| GRAS 40AG | ½” Pressure microphone for reference |
| Cables, Connectors, Adapters and Tools | |
| GRAS AA2006 | National Instruments Cable 180524-10 (50-position ribbon cable) |
| GRAS AA0033 | 1 m BNC cable (5 pcs) |
| GRAS AA0074 | 1 m LEMO extension cable (2 pcs) |
| AC0021 | BNC T-connector |
| GRAS RA0003 |
Straight adapter for ½” microphone and ¼” preamplifier |
| GRAS RA0063 | ⅛ microphone and ¼” preamplifier adapter |
| RA0081 | ½” microphone tool |
| RA0200 | ¼” microphone tool |
| RA0210 | ⅛” microphone tool |
| Documents | |
| - | GRAS license for SW0002 |
| LI0028 | 90CA Instruction Manual |
| - | Instruction manuals for 42AP, 12AQ and 14AA |
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Available Options
Special options are available for specific types of calibration, accredited calibration, and training.
GRAS OP0020
- Preamplifier Calibration Option
- ½’’ Pressure microphone, prepolarized
- ¼’’ Preamplifier with 3 m cable
- ½’’ CCP preamplifier
- ¼’’ CCP preamplifier with 3 m cable (Microdot connector)
- 20pF Input adapter for ½’’ preamplifiers
- 3 m microphone cable, SMB-BNC connector
- 1 m Cable BNC 50 ohm
- Test program for preamplifier
GRAS OP0021
- Calibration of 1” Microphone Option
- Adapter for 1” microphone and ½” preamplifier
- 1” Electrostatic actuator
GRAS OP0022
- Accredited Calibration of Reference Units
- DANAK calibration of reference microphone, reference preamplifier, and pistonphone
- Kit for sensitivity calibration of Flush-mount microphone Sets
- Kit for frequency calibration of Flush-mount microphone Sets
- Kit for sensitivity calibration of Surface microphone Sets
- Kit for frequency calibration of Surface microphone Sets
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
