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10 Advanced and Programmable Functions
A number of additional functions are available via the Functions menu, accessed by pressing
the
[Function]
key. These include:
Limits, Min/Max, Ax+b, Delta%, Watts and VA. An additional function of Logging is described in
the next section.
All functions are mutually exclusive and use the secondary display to show the result.
Consequently they cannot be used with any measurement that requires the secondary display
such as dual measurements and dB. Selecting a function will cancel dual measurement mode.
To cancel a function, press
[Function]
again. Changing the measurement parameter or
selecting dual measurements will also cancel a function.
10.1
Selecting or Cancelling a Function
A function is selected by pressing
[Function]
. This causes symbols for all of the available
functions to be displayed, with the most recently used one flashing. The Navigator keys are
then used to change the function (if required) and
[OK]
is used to select it.
A Function is cancelled by pressing
[Function]
again. Selecting a new measurement
parameter will also cancel the function. Note that pressing
[Cancel]
will also cancel the
function, but will also cancel other things such as Hold – see
section 6.13
.
10.2
Limits
High and low limits can be set, against which the reading is compared. When running, the main
display shows the actual reading and the secondary display shows
{PASS}
(reading between
or equal to set points),
{HI}
(reading >HI) or
{LO}
(reading <LO).
The units and decimal point position for the limit values are set by the existing measurement
parameter and range which must be selected before the function is selected.
To select Limits, press
[Function]
and use the Navigator keys to choose
{Limits}
as the
flashing symbol. Confirm with
[OK]
; the secondary display will flash the word
{run}
.
To view or edit the Limit values, press the Navigator
[<]
or
[>]
key to select
{Edit}
and confirm
with
[OK]
. The existing High limit
{HI}
value will be displayed and can be changed using the
Navigator keys (
[<]
/
[>]
to select the digit and
[
ଢ଼@
/
[v]
to change the value). Once the value is
set, it is confirmed with
[OK]
, after which the Low limit value
{LO}
can be viewed and edited in
the same way.
Once the
{LO}
value has been confirmed the display will return to flashing the word
{run}
.
Pressing
[OK]
at this point will start the function running.
The limits can be set anywhere in the range ±000000 to ±999999 with the decimal point set by
the range selected during editing. Pressing the shifted key Clear
[Shift] [Auto]
enters the
default value of +000000; pressing the shifted key Copy Rdg
[Shift] [Stop]
enters the current
reading as the value.
Limit values are stored as floating point numbers which are retained for any range and any
measurement parameter until
{Edit}
is selected again. At that point the displayed value, which
may be truncated or under-flowed by the limitations of the display with a changed decimal point
position, becomes the stored number.
10.3
Ax + b
When running, the scaled value (Ax + b) is shown in the secondary display and the normal
value (x) is shown in the main display. If the scaled reading exceeds ±999999,
{-Or-}
is shown
in the secondary display to indicate over-range.
The decimal point position for the b value is set by the existing measurement parameter and
range which must be selected before the function is selected.
