12
l
© Brüel & Kjaer Vibro GmbH
/
2 mm
ds822 ATEX /8.12.16/technical specifications subject to change/C105507.001/V02
EN
2 mm displacement sensor system series ds822 ATEX
| Installation
Instruction
4
Installation
Read the safety information in the chapter "Safety" before installation. To assemble the displace-
ment sensor system, proceed in the following order:
4.1
Sensor assembly
4.2
Driver assembly
4.3
Connect the components together
4.4
Start up the displacement sensor system
4.5
Electrical connection
Requirements:
The displacement sensor system is complete
(see “Components included in scope of supply:”on page 10).
The overall length of the measuring system neither exceeds nor falls below the nominal
length.
The required clearances and the width of the measuring track are considered
(9.3.2 Properties of the measuring track and 9.3.3 Required clearances and minimum dis-
tances for displacement sensors).
The sensitivity of the target material is known.
Operation as category 1/2 device
If an isolating transformer is used the communication link connected to the housing of the driver,
is grounded with a resistance of
10
9
Ω.
When used as an IIC equipment the driver must be installed in an ATEX-protective housing and
must be cleaned with a damp cloth only, to avoid static charges on the type plate. The steel pro-
tective conduit or steel tube must be galvanically connected to the sensor housing.
!
C
AUTION
!
If the measuring chain is operated as a category 1/2 device (sensor in zone 0
and driver in zone 1), the conduits between zone 0 and zone 1 (gas-tight
partition!) must be gas-tight and comply with protection class IP 67 (EN 60529).
!
C
AUTION
!
To prevent static charging, all sensor cables within zone 0 must be fitted with a
steel protective conduit or steel tube securely connected to the local potential
equalisation (contact resistance ≤ 1 MΩ). If electrostatic charging is possible on
a driver and the measuring chain is conducted on an isolating transformer at
once, the driver has to be protected with an additional housing or has to be
grounded with a resistor
10
9
Ω.
