CEMB USA T1-40 ATEX User Manual
Page 2
T1-40-ATEX 04 gb
2
SPECIFICATIONS
Type of measurement
: SEISMIC (absolute vibrations)
Field of application
: AMPLITUDE = ± 1000 µm p.p.
FREQUENCY = 10÷1000 Hz
DIRECT. OF VIBR. = ANY
Rated sensitivity
: 21,2 mV/mm/sec (RMS) a 25°C
Typical frequency
: 12 Hz
Damping coeff.
: 0.7
Cross sensitivity
: < 7%
Output impedance
: 1 Kohm at 25°C
Power supply
: None
Ambient operating range
: Temperature = see certification
Humidity = 100% max
Ambient = IP65 EN 60529/10.91
External connections
: Connector MS/MIL-C-5015 series 3102/16, std. accessory
Outer casing material
: Alluminium P.Al.Si 5.5 (Zone 1)
or
Stainless steel AISI 303 (Zone 0)
Weight of transducer
: approx. 0.300 kg
Fastening
: Screw, M8x1.25 – L=16 mm
Maintenance
: None
Enclosed drawings
: 17951 = Overall dimensions, layout and el. connections.
TRANSDUCER POSITIONING
Refer to drawing 17951.
N.B.: The operations should be performed possibly with the machine stationary and
taking the greatest care so as not to damage the internal mechanisms of the transducer.
1) On the support to be measured, drill a hole M8x1.25, 17 mm min. depth, making sure of its perpendicularity (if it is
not possible to reach the depth of 17 mm, provide spacers of suitable thickness between the support surface and
the transducer).
The surface on which the transducer rests should be flat and smooth. It is advisable to apply a layer of silicone
between the casing and the resting surface.
2) Screw the transducer in the M8x1.25 hole provided at point 1. Avoid knocks on the transducer. The use of a
thread compound is advisable during tightening.
3) Carry out the electrical connections of the transducer to the measuring instrument by using the free lead
connector (supplied as standard).
Notes regarding positioning:
-
The wiring MUST be made with cables resistant to agents related to the workplace (oils, corrosive acids,
temperature, etc.).
-
Shielded cables MUST be used. Make sure that the shield is connected to the frame earth (GND=ground) at just
one of the cable ends (the instrument side is advised).
-
The electrical conductors must all have a minimum cross section of 1.0 mm², max. possible cross section = 2.5
mm² for a max. distance of approx. 800 metres.