10. Programming With Programming-Menus
10.4.6 Reference Channel 1
The arithmetic functions of the function channels, generally, refer to a particu-
lar measuring channel (or 2 meas. channels) (s. 10.3.10, man. 6.3.4). During
the programming of a function channel the first channel of the corresponding
sensor connector Mxx1 is automatically set as reference channel Mb1. The
2nd reference channel Mb2 (for difference, average value M(n) etc.) is, initially,
the measuring point M00. In function
Reference ch. 1
it is possible to set
other measuring points as reference channel, either absolutely by specifying a
particular measuring point or by specifying the ´distance´ referred to the functi-
on channel (e.g. -01 identifies the channel preceding the function channel).
Programming of the ref. channel 1 absolute:
1 RefChannel 1: 01
Programming of the ref. channel 1 relative:
1 RefChannel 1: -10
10.4.7 Reference Channel 2 or Multiplexer
In case of function channels, which require a second reference channel (s.
above), the function
Reference channel 2
will automatically be displayed in
the line after
Reference channel 1
. In all other cases it is possible to
change the pin assignment in the connector by changing the input multiplexer
with the function
Multiplexer
(s. manual 6.10.2).
Programming of the ref. channel 2 absolute:
1 RefChannel 2: 00
Programming of the ref. channel 2 relative:
1 RefChannel 2: -01
Measuring inputs B+ and A-, GND-referred
1 Multiplexer: B-A
Measuring inputs C+ and A-, GND-referred
1 Multiplexer: C-A
Measuring inputs D+ and A-, GND-referred
1 Multiplexer: D-A
Differential measuring inputs C+ and B-
1 Multiplexer: C-B
Differential measuring inputs D+ and B-
1 Multiplexer: D-B
10.4.8 Element Flags
For a realization of sensor-specific additional functions, element flags can be
activated at each measuring channel (s. manual 6.10.3)
Measuring current 1/10 for Pt1000, 5000
Ω
:
ElementFlags: I 1/10
Emission and background temp. for IR sensors:
ElementFlags: IR
Meas. bridge with switch for final value simulation:
ElementFlags: Bridge
(Activation base value:) *
ElementFlags: Basis
(Activation of all averaging functions:) *
ElementFlags: Avg On
(Element flag 6:) *
ElementFlags: Flag 6
Switch-off of the sensor breakage detection:
ElementFlags: Br Off
Analog output 4-20mA instead of 0-20mA:
ElementFlags: A 4-20
*
At the ALMEMO 2690-8 these element flags have no meaning
62 ALMEMO 2690-8
