Page 14 of 44
TTI-7 Iss.02 – 06/11
Data Logging
To configure the data logging from the main measurement screen select SCAN and Mem
To set up a new log press New confirm that you wish to clear the current log and then press On to activate the
logging function press OK to confirm and Quit to return to measurement screen. The instrument will be in the
measurement hold state and to trigger the measurement start press the Trig key. All measured values will now be
stored in the Log. The logging function can be used in conjunction with canner sequences.
To review the logged values press SCAN and Rev
The values can be scrolled Up and Down using the Arrow keys
To exit this screen press OK (CAL ) key
“Hold Samples = 0/20 ”
ZERO
This key zeros the displayed value and "Zero" appears in the bottom left hand corner of the display.
NOTE: The Zero offset will be cancelled if the measuring channel is changed, if the calibration menu is
entered, or if the sensor configuration is changed.
TRIG
The TRIG key operates in two modes. These may be set using the OPT menu. The default mode
enables the TRIG key to be used as a run/hold button, and Run appears on the display above the key.
Pressing TRIG holds the display, and Hold will appear on the display. It will also be noticed that the
flashing "Busy" blanks in the hold mode. Pressing TRIG a second time returns the instrument to the run
mode. The second mode of operation may be set using the OPT menu. This enables the TRIG key to
be set in single shot mode, i.e. when pressing the TRIG key one measurement is made and held on the
display, and the busy sign flashes once. It should also be noted that even for large changes in
temperature readings the new measurement will be valid, the specially designed measurement circuit
ensures that the A/D converter is fully zeroed and stabilised before a new measurement is displayed.
When used in conjunction with the data logging function, the TRIG key is used to start the logging.
Pressing the TRIG key again puts the instrument into a hold state and the measurement channels may
now be changed. Restarting the measurement by pressing the TRIG key also resumes the data logging;
the newly selected measurement channel now being stored. It is possible to store readings from
channels A, B, or A-B. When in single measurement mode the instrument is normally in the hold state.
Pressing the TRIG key initiates one measurement which will be stored in the log, the instrument then
returns to the hold state.
+I
This selects the measuring current in the positive direction. The measuring time is approx. 1.8 seconds
per reading for channels A and B, and 3 seconds for A-B.
