9
All new BA538C rate totalisers are supplied
calibrated as requested at the time of ordering. If
calibration information is not supplied, the
instrument will be conditioned for an open
collector input, with SCALE-r and SCALE-t set to
1 and a timebase of seconds.
5.3 Summary of programmable functions
This section summarises all the programmable
functions. When read in conjunction with Fig 6 it
provides a quick aid for programming the
instrument. If more detail is required, each
section contains a reference to a full description of
the function.
SUMMARY
Display
Description of function
‘UpdAtE’
Display update time
Allows the interval between
display updates to be selected.
See section 5.4
'InPut'
Type of input
Enables one of five types of input
to be selected:
UOLtS
Voltage pulse
COIL
Magnetic pick-off
Pr.dEt
NAMUR proximity
detector.
COntACt
Switch contact
OP.COL
Open collector
See section 5.5
'd.P.'
Decimal points
Defines the position of the decimal
point in both the rate and total
displays and enables the rate and
total displays to be interchanged.
See section 5.6
‘dISPLAY.2’ Lower display
Turns the lower display, which
normally shows rate, on or off.
See section 5.7
Display
Description of function
'SCALE-r' Rate Scale Factor
Defines the arithmetic relationship
between the pulse input frequency
and the rate display. May be
adjusted between 0.001 and
99999999.
When used with a flowmeter,
SCALE-r should be set to the
flowmeter K factor (pulses per unit of
measurement) if the display is
required in the same flow units as the
K factor.
See section 5.8
't-bASE'
Timebase
Selectable multiplier to display flow
rate in units per second, per minute
or per hour.
Select:
tb-1
for flow / second
tb-60
for flow / minute
tb-3600
for flow / hour
See section 5.9
'FILtEr'
Rate filter
Adjustable digital filter to reduce
noise on the rate display. Two
parameters each adjustable between
0 and 9.
See section 5.10
'SCALE-t' Total Scale Factor
Defines the arithmetic relationship
between the number of input pulses
and the total display.
May be adjusted between 0.001 and
99999999.
When used with a flowmeter SCALE-
t should be set to the flowmeter K
factor (pulses per unit of
measurement).
See section 5.11
'CLIP-OFF' Clip off
To prevent the totalisation of very low
flow rates, clip-off enables the user to
select a flow rate below which
totalisation is inhibited.
See section 5.12
Содержание BA538C
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