GRAS 26CK 1/2” CCP Standard Preamplifier with Microdot Connector, Very Short

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV Gain: -0.45 dB
Special feature: For confined spaces

Technology

Typical applications and use

  • For use in confined spaces
  • High-frequency measurements
  • High-pressure measurements
  • Sound intensity measurements
  • Near-field measurements
  • Anechoic boxes
  • Hearing-aid measurements

Design

The small, ceramic thick-film substrate in the 26CK has a very high input impedance and is shielded by a guard ring, which minimizes the influence of stray capacitance and microphonic interference.

The 26CK is delivered with Generation II TEDS. The calibration data is programmed into the built-in TEDS according to IEEE 1451.4 using UDID I27-0-0-0U. If your measurement platform supports Transducer Electronic Data Sheets you will be able to read and write data like properties and calibration data.

Generation II TEDS chip (DS2431) may require updated system software.

 

It can be used with the following GRAS prepolarized microphones:

  • 40AE ½” Prepolarized Free-Field Microphone
  • 40AD ½” Prepolarized Pressure Microphone
  • 40AO ½” Prepolarized Pressure Microphone,High Frequency
  • 40AQ ½” Prepolarized Random Incidence Microphone

The 26CK has an integrated Microdot output connector.

The casing is made of stainless steel for maximum strength and durability.

Calibration

Before leaving the factory, GRAS products are tested and calibrated by GRAS, and an individual test certificate is included with the product.

GRAS Sound & Vibration continually strives to improve the quality of our products for our customers; therefore, the specifications and accessories are subject to change.

Specifications

Frequency range (±0.2 dB) with 18 pF microphone dummy
Hz
2.5 to 200 k
Slew rate
V/µs
20
Input impedance
GΩ // pF
20 // 0.4
Output impedance
Ω
<50
Output Voltage Swing, min. @ 24-28 V CCP voltage supply
Vp
8
Noise (A-Weighted) max.
µV
2.5
Noise (A-Weighted) typ.
µV
1.8
Noise (Linear 20 Hz – 20 kHz) max.
µV
6
Noise (Linear 20 Hz – 20 kHz) typ.
µV
3.5
High-pass filter @3dB cut-off
Hz
TBD
Gain
dB
-0.45
Power supply (Constant Current Power)
mA
2 to 20 (typ. 4)
DC bias voltage, typ.
V
12
Temperature range, operation
°C / °F
-30 to 70 / -22 to 158
Temperature range, storage
°C / °F
-40 to 85 / -40 to 185
Humidity range non condensing
% RH
0 to 95
TEDS UDID (IEEE 1451.4)
I27-0-0-0U
Connector type
Microdot 10/32
CE/RoHS compliant/WEEE registered
Yes / Yes, Yes
Weight
g / oz
TBD
Specification Conditions

Conditions: 23 °C Ambient temperature, 4 mA / 24 V open loop CCP voltage, 18 pF dummy microphone, 3 m output coax-cable. GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

Dimensions

Ordering info

Optional items

GRAS AA0070

3 m Microdot - BNC Cable

GRAS AA0073-CL

Customized Length Microdot - BNC Cable

GRAS AA0087-CL

Customized Length Microdot - Microdot Cable

GRAS AL0008

1/2" Microphone Holder, POM

GRAS AL0012

1/2" Microphone Holder, Stainless Steel

GRAS AL0005

Swivel head

GRAS AL0006

Tripod

GRAS RA0019

Adapter for 1/4" microphone and 1/2" preamplifier

GRAS RA0073

Adapter for 1" microphone and 1/2" preamplifier

GRAS RA0190

Right-angled (90º) Adapter for 1/2" Microphone and 1/2" Preamplifier

GRAS RA0018

20 dB Attenuator for prepolarized 1/2" microphones

GRAS RA0062

20 pF Preamplifier-input Adapter for 1/2" preamplifiers

GRAS 12AL

1-Channel CCP Power Module with A-weighting filter

GRAS 12AQ

2-Channel Universal Power Module with signal conditioning and PC interface

 

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

Get Quote