11. Programming With Programming-Menus
11.4 Special Functions
The data logger 2890-9 has a separate menu
allowing access to all ALMEMO
®
special func-
tions, which despite only rarely being required
during routine operation, are very useful for
some applications (see manual 6.10). These
functions can (to a certain extent) be very
complex and should only be used if their oper-
ation is completely understood.
11.4.1 Print Cycle Factor
For the adaptation of the data recording to the
update speed of the individual measuring points it is possible to program a
print cycle factor between 00 and 99 to output measuring points less often or
not at all (see manual 6.10.6). Only disturbed measuring points, e.g. on ex-
ceeding of limit values will always be output. Generally, the print cycle factor of
all measuring points is cleared or set to 01, i.e. all activated measuring points
will be output at each cycle. If a different factor, e.g. 10 is programmed, the
corresponding measuring point will only be put out once in ten times, however,
if 00 is programmed it will not be output. The data recording also allows to sup-
press unnecessary measured values and, as a result, saves memory space.
Enter the print cycle factor (s. 9.5) in function:
Print cycle factor: 01
Clearing the print cycle factor with the key:
<CLR>
11.4.2 Minimum Sensor Supply Voltage
Similarly to all ALMEMO
®
devices, the sensor supply voltage is also monitored
in the 2890-9. It is also displayed in the menu
Power supply
(s. 11.7). How-
ever, there are also sensors, which require for a correct operation a supply
voltage, which requires a charged accumulator or a power supply unit. To
avoid measuring errors, the sensor programming allows to individually program
the required minimum sensor voltage for each transducer. In case of falling be-
low this voltage the measured value is treated as sensor breakage (indication L
flashes).
Entering the minimum sensor supply voltage:
U-Sensor Min: 12.0 V
Switching off the voltage control with the key:
<CLR>
U-Sensor Min: ---- V
62 ALMEMO
®
2890-9
* SPECIAL FUNCTIONS *
±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
Connector: 1 Channel: 11
Print cycle factor:
01
U-Sensor min:
12.0 V
7 Action max:
Start R1
7 Action min:
Ende R2
6 Analog-start:
0.0 °C
6 Analog-end:
300.0 °C
Output function:
MESS
1 Reference ch. 1:
(01)
1 Multiplexer:
(B-A)
Element flags:
IR
Calibration offset: -12345
Calibration faktor: 43210
M PRINT ESC