5. CONFIGURATION AND CALIBRATION
Set Point Stations are configured and calibrated via
the four front panel push buttons. All the
configuration functions are contained in an easy to
use intuitive menu that is shown diagrammatically in
Fig 6.
Each menu function is summarised in section 5.1
and includes a reference to more detailed
information.
Throughout this manual push buttons are shown as
P, E, ▼ or ▲ and the Set Point Station display
legends are shown within inverted commas e.g.
'CA ' and 'CodE'.
Access to the configuration menu is obtained by
operating the P and E push buttons simultaneously.
If the Set Point Station security code is set to the
default 0000 the first parameter 'rE5n' will be
displayed. If a security code other than the default
code 0000 has already been entered, the Set Point
Station will display 'CodE'. Pressing the P button
will result in ‘0000’ being displayed with one digit
flashing. To gain access the four digit security code
should be entered using the ▲ and ▼ push buttons
to set the flashing digit and the P button to move
control to the next digit. When the correct four digit
code has been entered, pressing E will cause the
first parameter 'rE5n' to be displayed. If the code is
incorrect, or a button is not pressed within twenty
seconds, the Set Point Station will automatically
return to the operating mode.
Once within the configuration menu the required
parameter can be reached by scrolling through the
menu using the ▲ or ▼ push buttons as shown in
Fig 6. When returning to the operating mode
following recalibration or a change to any function,
the Set Point Station will display ‘dAtA’ followed by
‘SAVE’ while the new information is stored in
permanent memory.
All new Set Point Stations are supplied calibrated as
requested at the time of ordering. If calibration is not
requested, instruments will be supplied with the
following default configuration:
De ault Con iguration
Resolution ‘rE5n’ 10
Display at 4mA output ‘2ero’ 0.00
Display at 20mA output ‘5PAn’ 100.00
Output current limits ‘H - - ’ 03.000 & 22.000
Maximum output rate of change 000
P button in operating mode ‘P.Fn’ PC
Pulses per rev of external encoder ‘EnC’ 12
Security access code ‘CodE’ 0000
Default configuration can easily be changed on-site.
5.1 Summary o con iguration unctions
This section summarises each of the configuration
functions and includes a cross reference to a more
detailed description. Fig 6 illustrates the location of
each function within the configuration menu.
Display Summary o unction
'rE5n' Adjustment resolution
Defines the adjustment resolution of the
front panel ▲ and ▼ buttons and the
optional external rotary control when
adjusting the output current with the Set
Point Station in the operating mode. May
be set to ‘1’, ‘10’ or ‘100’ least significant
digits of the display.
See section 5.2
'dP' Decimal point
Positions a dummy decimal point
between any of the displayed digits or
turns it off.
See section 5.3
‘ CAL’ and ‘SEt’ are alternative ways o
calibrating the Set Point Station digital display.
'CAL' Calibration o the digital display using
an external current meter.
Preferred method of calibrating the digital
display which enables the zero and span
of the Set Point Station display to be
calibrated to show the engineering units
represented by the 4/20mA output.
Calibration may be performed at any
output current providing the points are at
least 4mA apart. Requires an accurate
external current meter.
See section 5.4
'5Et' Calibration o digital display using
internal re erences.
Using the Set Point Station’s internal
reference, this function enables the
digital display to be calibrated to show
the engineering units represented by the
output current at 4mA and 20mA.
Unlike the ‘CA ’ function, an accurate
external current measuring instrument is
not required and the Set Point Station
does not have to be disconnected from
the loop, but calibration can only be
performed at 4 and 20mA.
See section 5.5
