BEKA BA368C, Manual

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4.5.2 Function of instrument: ‘Function’
This is the first function in the programme menu
which conditions the instrument as a counter,
timer, tachometer or as a clock.
CAUTION
This function must be entered before any of
the other parameters are programmed. It is
protected by a password to prevent
accidental changes.
To define the function of the instrument select
‘Function’ from the main menu and press
P which
will reveal the existing setting. Pressing the Up or
Down button will scroll through the four options:
Display Instrument function
‘CountEr’ Counter
‘CLOC’ Clock
‘tACHO’ Tachometer
‘ELAPSE’ Timer
When ‘tACHO’ is displayed, press P which will
result in ‘Set.nO’ being displayed. To proceed
press
Up or Down which will change this to
‘Set.YES’. To confirm the function change, press
P which will result in prompt 'Set 0000' with one
digit flashing. Using the Up , and Down buttons
and the P button to move to the next digit, enter
the password 'SurE'. Note 'S' is entered as '5'.
Finally, pressing
E will execute the change to a
tachometer and return the display to the 'Function'
prompt in the main menu.
4.5.3 Type of input: ‘InPut A’
To define an input type select ‘InPut A’ from the
menu and press
P, which will reveal the current
input type. Pressing the Up or Down button will
scroll through the five options:
‘UOLts’ Voltage input
Threshold 1V and 3V
5kHz max.
‘COIL’ Low voltage
Threshold 20mV peak
5kHz max.
‘Pr.dEt’ NAMUR proximity detector
Threshold 1.2 and 2.1mA
5kHz max.
‘COntACt’ Switch contact
Threshold 100 and 1000
Ω
100Hz max
‘OP.COL’ Open collector
Threshold 2k
Ω
and 10k
Ω
5kHz max.
When the required type of input has been selected
press
E to enter the selection and return to the
‘InPut A’ prompt in the main menu.
Note: To count reliably, the input signal must fall
below the lower switching threshold and rise above
the higher switching threshold.
4.5.4 Position of the decimal point: ‘d.P.’
The BA368C speed display has six digits and the
decimal point may be positioned between any of
them, or may be omitted.
To adjust the position of the decimal point select
'd.P.' from the main menu and press
P. This will
activate the display with one digit plus the
following decimal point flashing. If only the least
significant digit is flashing the decimal point will be
omitted. The position of the decimal point can be
moved by pressing the
Up or Down push-button.
When the decimal point is positioned correctly
press
E to return to the main menu.
Note: The run-time display has a fixed decimal
point to give resolution of 0.1 hours.
4.5.5 Lower display: ‘dISPLAY.2’
This function turns the lower display, which shows
the run-time, on or off. When turned off the
BA368C will just display speed, when turned on
the instrument will display speed and the run-time
simultaneously.
To check the status of the lower display select
'dISPLAY.2' from the menu and press
P which will
reveal if the function is 'On' or 'OFF'. If necessary
press the
Up or Down button to change the setting,
followed by the E button to return to the main
menu.
4.5.6 Rotational scale factor: ‘r SCALE’
This function together with the timebase ‘t-bASE’
defines the arithmetic relationship between the
pulse input frequency from the rotary transducer
and the BA368C speed display.
‘r SCALE’ is a dividing factor that may be adjusted
between 0.001 and 99999999. It compensates for
the number of pulses the transducer produces per
revolution. It may also be used to produce a
display in other engineering units such as
hundreds of revolutions or in linear units such as
metres per minute.