Delta OHM HD2817T Series, Manual

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A cursor is added over the graph. Initially, it is located on the graph’s right edge. When time
goes by, the graph moves toward the left and the current data appear on the right vertical
axis.
•
The indications on the two lines define date, time and value of the measurement on the
cursor. Use the
 
arrows to move the cursor from its initial position.
•
The lower line indicates the time interval represented by each pixel: it goes from a
minimum of 20 seconds to a maximum of 2 hours (7200 seconds).
•
Since to draw a new graph point you need from a minimum of 20 seconds to a maximum of
2 hours (7200 seconds), the graph may appear “frozen”, generating the doubt that the
instrument is not working. The asterisk on the right is blinking to indicate that the
instrument is working correctly.
•
The graph can be expanded on the horizontal axis, using the ZOOM

key. The horizontal
zoom expands the pixel near the cursor, displaying its samples. According to the available
space, also the nearby pixels are expanded up to a maximum of 96 points.
•
The graph can be expanded on the vertical axis, using the ZOOM

key. When first pressing
the key, the “ fit to screen ” function is performed, that is, the vertical axis is expanded or
reduced so as to display the entire graph to its maximum width. When pressing the key
again the graph is further expanded up to the maximum resolution.
•
You can change the physical quantity displayed on the graph using the UNIT key, without
accessing the menu.
I. STAND-BY
The stand-by item has two functions: Offline and Probe Change .
STAND-BY
Offline
Probe Change
<UP> <DOWN> select
<ENTER> confirm
<ESC> exit
I.1. “ Offline ” This mode turns off the instrument: the relays are de-energised, the analog
outputs are set to zero (0mA and 0V) and logging is stopped.
To enable it, use the
 
arrows to select the “ Off-line ” item and confirm with ENTER.
The following is displayed: “ STAND BY - <ENTER> exit stand-by ”.
To reactivate the instrument, hold down ENTER for about 10 seconds.
I.2. “
Probe Change ” (“ Suspend ” mode) You can use it to correctly replace a probe. It avoids
stopping the process and, when returning to normal state, the instrument reads the new
probe calibration parameters.
Use the
 
arrows to select the Probe Change item and confirm with ENTER. The
instrument freezes the current state on all outputs and allows one minute to replace the
probe. The time is indicated by a timer on the display (
Time out ) and by a progressively
accelerated beep.