BEKA BA334E, Manual, Page: 6 / 64

6
2.3 Displays
The BA334G has two digital displays and
associated annunciators, plus a flow indicator as
shown on front cover.
Total Shows the total flow on the
display upper eight digit display. May
be reset to zero via front panel
push buttons or by a remote
reset switch.
Rate Shows the flow rate on the
Display lower six digit display.
Flow This disc in the lower left
indicator hand corner of the display
'rotates' for two seconds each
time an input pulse is received.
Appears to rotate continuously
when input frequency exceeds
0.5Hz.
Hold Activated when input
annunciator frequency is below the clip-off
threshold.
Reset Activated while instrument is
annunciator being reset via the front panel
push buttons, or the external
reset terminals.
Rate Identifies rate display
annunciator
Total Identifies total display
annunciator
2.4 Display over-range
Over-range of the upper eight digit display or the
lower six digit display is indicated by all the digits
displaying
9
and all the decimal points flashing.
3. INTRINSIC SAFETY CERTIFICATION
The BA334G has ATEX and IECEx gas and dust
certification. This section of the instruction manual
describes ATEX gas certification. ATEX dust and
IECEx approvals are described in Appendixes 1
and 2.
3.1 ATEX gas certification
Notified Body Intertek Testing and Certification Ltd
have issued the BA334G with an EU-Type
Examination
Certificate number
ITS16ATEX28408X. This confirms compliance
with harmonised European standards and it has
been used to confirm compliance with the
European ATEX Directive for Group II,
Category 1G equipment, Ex ia IIC T5 Ga
equipment. The Rate Totaliser carries the
community mark and, subject to local codes of
practice, may be installed in any of the European
Economic Area (EEA) member countries. ATEX
certificates are also acceptable for installations in
Switzerland.
This section of the instruction manual describes
ATEX installations in explosive gas atmospheres
conforming with EN
60079-14 Electrical
installations design, selection and erection . When
designing systems for installation outside the UK
the local Code of Practice should be consulted.
3.2 Zones, gas groups and T rating
The BA334G Rate Totaliser has been certified
Ex ia IIC T5 Ga. When connected to a suitable
system it may be installed in:
Zone 0 explosive gas air mixture
continuously present.
Zone 1 explosive gas air mixture likely
to occur in normal operation.
Zone 2 explosive gas air mixture not
likely to occur, and if it does
will only exist for a short time.
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
In gases that may be used with equipment having
a temperature classification of:
T1 450°C
T2 300°C
T3 200°C
T4 135°C
T5 100°C
At ambient temperatures between -40 and +70°C.