Analogue Inputs (Incl. Mathematic Function) - Endress+Hauser eco-graph a Betriebsanleitung

4. Setting up unit - SET UP
4.3.2 Analogue inputs:
54
"Always on": No switch off
"Switch off after x minutes": Switches display off x minutes after the last push button has
been operated.
Rear illumination
"Switch daily": Times when the display rear illumination is switched off and on can be set.
Hint: All further functions are not effected (green LED is on when the unit is operating
normally and there is no alarm condition. If events have occurred or alarm conditions active
then the red LED flashes). Operation of any push button activates the rear illumination again.
• Settings/alarm set points for the analogue measurement points view resp.
change
Can be individually selected per channel. See "Connections/terminal layout" and
Signal
"Technical data".
Channel identifier Identifier for the measurement point connected to this input channel. 10 characters.
Additional information to the channel identifier (e.g. respective measurement point
number, tag identification system in power stations etc.). 13 characters.
Hints: Can only be set up if "With additional channel info" is selected up in "Basic settings
Additional information
- Channel identifier". If required the additional info can be listed on screen together with
the channel identifier in normal operation (select the display mode using the
buttons).
Input of the engineering (physical) unit for the measurement connected to this input (e.g.
Engineering units
bar, C, m3/h, ...). 5 character.
Decimal point Number of decimal points for the 5 digit measured value display.
The unit measures the signal faster than the plot is updated. Select which type of
measured values are to be plotted.
"Instantaneous values": Stores the measurement at the input at the time of memory
update.
"Average values": Stores the calculated average value since last average calculation at
the time of memory update.
"Minimum values": Stores the lowest measured value since the last update at the time of
memory update. This storage mode should be selected for measurement points that must
Plot type
always lie above a specific low limit (e.g. temperature measurement on sterilisation of
foods).
"Maximum values": Stores the highest measured value since the last update at the time of
memory update. This storage mode should be selected for measurement points that must
always lie below a specific high limit (e.g. maximum allowable pressure in pipelines).
"Envelope curve": Plots fast signal changes (same as a standard strip chart recorder),
however requires more memory space, because both the lowest and highest measured
values since the last memory update are stored.
Transmitters transform the physical measurements into a standard signal. Example: 0-14
Range start
pH sensor signal is transformed to 4-20 mA. Enter the range start, at 0-14 pH enter "0".
• Rear illumination: Settings for
switching off the rear illumination
("Screen saver": Switching off screen
increases the life of the rear
illumination).
ïð
push