PULSAR MEASUREMENT
27
FM
For
EEx m
(
Zone 1)
applications a transducer certified to
FM Class I Div 1
Group A, B, C & D, ClassII Div 1 Group E, F & G, Class III
is used, and must
be supplied via a 1500A breaking fuse, which is fitted as standard to the
UltraTWIN level controller.
Restrictions do not use in the presence of these groups of Chemicals,
Aliphatic Hydrocarbons, Ketones or Esters
For
EEx ia
(
I.S.)
a transducer certified to
FM Class I Div 1 Group A, B, C &
D, ClassII Div 1 Group E, F & G
is
used, which must be connected to the
UltraTWIN via an external Zener barrier.
See transducer label for certification details.
Relay Outputs
The five relays can be programmed for a variety of alarms, pump control, or
other process functions. The relay contacts are all rated at 5A at 240V AC. All
connections should be such that the short circuit capacity of the circuits to
which they are connected, is limited by fuses rated so that they do not
exceed the relay rating.
Current Output
This is an isolated (floating) mA output (to 150 V), of 4 - 20mA or 0 - 20mA,
and the load should not exceed 500
.
Important Information
When using the UltraTWIN to measure the
differential level
between the two
points of measurement then
transducer one
must be located on the
upstream
side of the application.
