PCB PIEZOTRONICS INC.
3425 WALDEN AVE.
DEPEW, NEW YORK 14043
3425 Walden Ave
Depew, New York 14043
N
o
68249
N
o
1
of
2
Rev. NR
ECO #: 47371
INSTRUCTIONS FOR USE - EX378XYYY Microphone System Series
Model(s)
EX378XYYY Series where “X” is any letter A-Z, “YYY” is up to three numbers 0-999
Markings
PCB
Depew, NY
LCIE 17 ATEX 3059 X
Ex I M1, Ex ia I Ma
Ex II 1G, Ex ia IIC T4 Ga
IECEx LCIE 17.0063X
Ex ia I Ma
Ex ia IIC T4 Ga
ETL c/us Listed Intertek 5010230
CL I, DIV 1, GR A,B,C,D
CL I, ZONE 0, AEx/Ex ia IIC T4 Ga
-40
⁰
C ≤ T
amb
≤+80
⁰
C
Putting Into Service
Powering: All ICP
®
Microphone Systems require constant current excitation for proper operation. For
this reason, use only PCB constant-current signal conditioners or other approved constant-current
sources. The power supply consists of a current-regulated, 18 to 30 VDC source. This power is
regulated by a current-limiting circuit, which provides the constant-current excitation required for
proper operation of ICP
Microphone Systems.
In general, battery-powered devices offer versatility for portable, low-noise measurements, whereas
line-powered units provide the capability for continuous monitoring. Consult the Vibration Division’s
product catalog for more information about signal conditioners.
NOTE: Under no circumstances should a voltage be supplied to an ICP
Microphone System without
a current-regulating diode or equivalent electrical circuit. This may include ohmmeters, multi-meters
and continuity testers.
Safe Use
After completing the system setup, switch on the signal conditioner and allow 1 to 2 minutes for the
system to stabilize. The meter (or LED) on the signal conditioner should be reading “green.” This
indicates proper operation and you may begin taking measurements. If a faulty condition is indicated
(red or yellow reading), first check all system connections, then check the functionality of the cable
and signal conditioner. If the system still does not operate properly, consult a PCB factory
representative.
NOTE: Always operate the Microphone System within the limitations listed on the enclosed
Specification Sheet. Operating the device outside these parameters can cause temporary or
permanent damage to the Microphone System.
Assembling
The EX378XYYY Series come assembled in system consisting of a Microphone and a Pre-
Amplifier. It does not require any assembly. Only mounting to low profile stands and clamps while
taking measurements.
Dismantling
Other than removal from the mounting, there is no disassembly of the sensor required to take it out of
service.
Maintenance
Routine maintenance, such as the cleaning of electrical connectors, housings, and mounting surfaces
with solutions and techniques that will not harm the physical material of construction, is acceptable.
