Delta OHM HD2817T Series, Manual

Page: 27 / 64

27
OUT 1
TEMPERATURE RANGE
Scale low value:
20.0 °C
Scale high value:
100.0 °C
<ENTER> select
<ESC> exit/cancel
Scale low value represents the lower limit of the measured physical quantity, e.g.
temperature, corresponding to the bottom scale value of the analog output
(4mA, 0Vdc or 2Vdc according to the selected type of output).
Scale high value represents the upper limit of the measured physical quantity, e.g.
temperature, corresponding to the top scale value of the analog output (20mA or
10Vdc according to the selected type of output).
Press ENTER to toggle between the items: the selected item will blink. Use the
 
arrows to change it, and press ENTER to confirm the value and go to the other item.
Press ESC to exit.
Repeat for the other two analog outputs.
Press MENU to return to measurement mode.
H. VIEW MODE
The graphic display shows simultaneously three numeric variables, or the graph, in real time,
of one of the available quantities.
The graph represents a curve of average values : each display point (pixel) is the average
calculated over a period according to the sampling interval set in the menu (MENU >>
“Logging” >> “Log interval”), as shown in the table below.
Logging interval (sec) Samples per pixel Interval shown on the display
1 20 30 minutes
2 40 1 hour
5 75 2 hours
10 150 4 hours
20 300 8 hours
60 (1 minute) 900 24 hours
120 (2 minutes) 1800 48 hours
240 (4 minutes) 7200 192 hours
For example, by selecting a 1-second logging interval, each point or pixel represents the
average calculated on 20 consecutive samples (equal to 20 seconds as the instrument
performs a measurement every second). The entire display shows a portion of the graph of 30
minutes.
If the logging interval is 240 seconds (4 minutes), each pixel is calculated over an average of
7200 consecutive samples, equal to 7200 seconds. The entire display shows a portion of the
graph of 192 hours.
To display the graph of a physical quantity, proceed as follows:
•
Select the menu item MENU >> View Mode and press ENTER.