3
1 COMMON FEATURES
The BA364D is a multifunction intrinsically safe
field mounting instrument that may be
programmed on-site as a counter, timer,
tachometer or as a clock. Complying with the
European ATEX Directive, the instrument has
been certified intrinsically safe for use in
explosive gas and combustible dust
atmospheres.
ATEX dust certification is available as an option -
see Appendix 1.
For use in the USA a version having FM intrinsic
safety and nonincendive approval is available –
see Appendix 2.
Housed in a robust IP66 glass reinforced
polyester (GRP) enclosure with an armoured
glass window, the BA364D is surface mounting,
or may be pipe mounting using one of the
accessory kits described in section 1.9.2
1.1 STRUCTURE OF INSTRUCTION MANUAL
This instruction manual is divided into five
sections. The first covers the common features
of the instrument. The remaining are self
contained sections each describing one of the
BA364D functions.
1.
Common features of the instrument
including installation, intrinsic
safety and accessories.
2.
Use as a counter
3.
Use as a timer
4.
Use as a tachometer
5.
Use as a clock
1.2 OPERATION
Fig 1.1 shows a simplified block diagram of the
BA364D. The instrument may be programmed
on-site as a counter, timer, tachometer or as a
clock. The two inputs may be individually
configured to accept voltage, contact, open
collector or 2-wire proximity detector inputs.
Accessories include a pulse output, 4/20mA
analogue output and two solid state control
outputs.
Fig 1.1 Simplified block diagram of BA364D
1.2.1 Counter
When configured as a counter the BA364D will
accept pulses on one or both inputs and may be
programmed to display:
Input A
+
Input B
Input A
-
Input B
Input A, direction controlled by input B
Input A and B quadrature input
(for position sensing)
An optional pulse output, 4/20mA analogue
output and alarm contacts are available.
See section 2 of this manual for a detailed
description of counter functions.
1.2.2 Timer
The timer functions may be started and stopped
from input A alone, inputs A and B, or from the
front panel pushbuttons. Elapsed time may be
displayed in hh:mm or hh:mm:ss format. The
instrument will normally be ordered with two
optional solid state control outputs.
See section 3 of this manual for a detailed
description of the timer functions.
1.2.3 Tachometer
When programmed as a tachometer the BA364D
has one input which may be conditioned to
operate with most types of pulse output
transducer. The instrument will display rotational
speed per second, minute or hour, or linear
speed in engineering units. To assist with routine
maintenance, a run-time counter records the
number of hours the monitored machinery has
been operating. Optional alarms and an analogue
4/20mA output are available.
See section 4 of this manual for a detailed
description of the tachometer functions.
Please read section 1
plus the section
describing the function
that you wish to use.
