G.R.A.S. 45CA User Manual

1" Pressure
Microphone
Type 40EN
1" to ½" Adapter
RA0017
½" to ¼"
Adapter
RA0003,
NOT Included
with the
¼" Preamplier
Type 26AS
¼"Preamplier,Short
Type 26AS *
1" to ½"
Microphone
Adapter
RA0058
1" Microphone
Protection
Grid
RA0177
½" to ¼" Adapter
GR0010
(included with the
¼"Preamplier)
½" Pressure
Microphone
Type 40AP,
protection
grid removed
½" Pressure
Microphone
Type 40AD,
protection
grid removed
¼"Preamplier,Short
Type 26CS *
Cable AA0018
G.R.A.S. SOUND & VIBRATION
Page 8
Hearing-Protector Test Fixture Type 45CA
Fig. 4.1 Assembly options (exploded view)
4 CongurationwithPressureMicrophone,
1" Type 40EN or ½" Type 40AP/40AD
Applications
Insertion Loss of Ear Muffs. If Microphone 1"Type40ENisused,thecongurationisinconform-
ity with ISO 4869-3.
RequiredAccessories
• The parts shown in Fig. 4.1 (choose one of the three assembly options)
• Pistonphone Type 42AP (recommended) or Type 42AA
• Test instruments such as those shown in Fig. 4.14
4.1 AssemblingMicrophoneandPreamplier
Fig.4.1displaysthreeoptionsforthemicrophone/preamplierassemblyrequiredforthemeas-
urements.
1" Type 40EN OR ½" Type 40AP OR ½" Type 40AD
_____________
* For space limitations, the super-short ¼"PreamplierType26AS/Type26CS(shown)isrequiredforbinauralmeasure-
ments. For monaural measurements, replaceType 26AS with Type 26AC and Type 26CS with Type 26CB.

G.R.A.S. 45CA Specifications

General

Brand	G.R.A.S.
Model	45CA
Category	Protection Device
Language	English