Data Logging and Printing
Data Logger
The logger function can store up to 100 readings from the main display in non-volatile memory.
The store is linear, without wrap-around. Readings are triggered by either the internal timer,
manual key press, remote contact closure or RS232 remote command. Readings are stored as
floating-point numbers with their units and reading number but without any form of time stamping.
Setting and Running the Logger
To use the logger first set up the measurement function and range required on the Main display.
To select Logger press the FUNCTION key until the LOGGER symbol flashes in the menu of
modifiers; then press Edit to set the logger triggering interval. During edit mode the main display
shows PEr (period) and the secondary display shows the logger internal timer period (in seconds)
which can be edited using the Change Digit/Step Digit keys as described earlier in the Number
Editing section. The period can be set from 1 second to 9999 seconds; setting the period to 0000
turns the internal timer off.
The Manual Log key, remote contact closure (at the RS232 input) and RS232 remote commands
are all logically OR’ed with the internal timer. Thus to use any of these means of triggering the
logger the internal timer should be set to 0000; this is the default value and can most easily be
set by pressing Clr during edit.
To set the logger to be triggered by remote contact closure the internal timer period must be set to
0000 (see above) and the RS232 interface must be configured for remote triggering. To do this
press Shift then Baud (the shifted function of Run); the main display changes to show bAUd and
the secondary display shows the current setting. Use the Range Up/Range Down keys to step
through the choices until triG shows in the display; exit the selection at this point by pressing
Baud again or Esc. The RS232 interface is now configured to act as a remote trigger for the data
logger by contact closure between pins 2 and 3; do not apply an external voltage to these pins or
damage to the instrument may result. Reselect the logger using the FUNCTION key.
The logger is run by pressing the Run key and stopped by the Cancel key; a short beep is
sounded every time a measurement is stored.
The logger starts from location 1 if the store is empty and from the next empty store location on
subsequent occasions; when the logger reaches 100 measurements it ignores further triggers.
Pressing Cancel while the logger is running will stop the logger and exit the function without
losing the data.
Reviewing Results and Clearing the Logger
The logger results can be reviewed at any time by pressing Shift, Logger Rcl (the shifted function
of EDIT); if the Logger is running, this action will stop it.
The logged result is shown in the main display with the reading number in the secondary display;
the LOGGER annunciator is shown. All valid store locations can be inspected by scrolling through
them with the Range Up and Range Down keys. Empty store locations cannot be selected and
the scrolling ‘wraps-around’ from highest valid location to location 1 when ranging up and vice-
versa when ranging down. Press Esc to exit logger recall mode.
To clear the logger press Shift, Clr Logger (the shifted function of Cancel); if the loggers is
running, this action will stop it. The secondary display will briefly show the LOGGER symbol and
‘none’ in the secondary display to show that it has been cleared; if the logger is reviewed when all
locations are empty it will similarly show ‘none’ briefly in the secondary display.
To print the logger results, see next section.
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