Minimum Sensor Supply Voltage; Output Function - Ahlborn ALMEMO 2590-2 Operating Instructions Manual

12.12.4 Minimum sensor supply voltage

As with all ALMEMO
ply voltage on the 2590 is monitored. The sen-
sor supply voltage is displayed in the
(see 9). Some sensors, however, will only
menu
operate properly with their own supply voltage;
this may require e.g. a mains unit. To prevent
measuring errors the minimum sensor voltage
needed by each individual sensor can be en-
tered in Sensor programming. If the voltage drops below this value the mea-
sured value will be treated as a sensor breakage and display ´L´ flashes (see
8.2).
To enter the minimum sensor supply voltage : Sensor voltage, min :
To disable voltage monitoring, to delete the value :

12.12.5 Output function

If the current measured value is not actually needed but only the maximum,
minimum, average, or alarm value, this function can be programmed as output
function (see Manual 6.10.4). Saving, analog output, and digital output will then
only process the specified function value. As verification for the output function
being thus changed the measured value is shown with the symbols listed be-
low (see 8.2).
Examples
1. If measured values are being averaged over the cycle the only output value
of interest is the average value itself, not the last measured value. With a
data logger this saves memory capacity.
2. The analog measured value from dew sensor FH A946-1 is not really signif-
icant. I you set limit value, maximum to approx. 0.5 V and program the
"alarm value" function, you will then only receive the values 0.0% for dry
and 100.0% for dew.
Output function
Measured value
Difference
Maximum value
Minimum value
Average value
Alarm value
devices the sensor sup-
®
Verification symbols
D
H
L
M
A
* SPECIAL FUNCTIONS 2 *
Sensor voltage, min : 12.0 V
INFO
1 Output function : MEAS
1 Reference channel 1:
1 Multiplexer :
1 Element flags:
Calibr. val: -12345
Mªª Pª
<CLR>
Sensor voltage, min : ---- V
Menu
Output function: Meas
Output function : Diff
Output function : Max
Output function : Min
Output function : M(t)
Output function : Alrm
ALMEMO ®
Special functions
(01)
(B-A)
IR
43210
12.0 V
2590 57