Ahlborn ALMEMO 2590-2, Руководство по эксплуатации

Страница: 23 / 76

Menu Sensor display
10.1.1 Selecting a measuring point
By pressing key

you can select one after the other all active measuring
points and have the current measured value displayed for each. By pressing

you can move back to the previous channel. When a particular measuring
channel is selected the associated input channel is also selected at the same
time.
To increment the measuring channel press

.
To decrement the measuring channel press

.
10.2 Measured value correction and compensation
To achieve maximum measuring accuracy zero-point correction and, partly at
least, gain adjustment can be performed for sensors as early as the
Sensor
display
menu. For all sensors with 2 actual values and 2 setpoint values univer-
sal two-point adjustment is provided via the function menus
Two-point adjust-
ment
(see 11.3) and
Scaling
(see 11.4). For sensors dependent on ambient
temperature or atmospheric pressure the appropriate compensation parame-
ters are provided as early as the
Sensor display
menu; (see 10.2.4 and 10.2.5).
10.2.1 Set measured value to zero
One very useful function is to zero the measured
value at certain locations or at certain times as a
reference value in order then to observe only the
subsequent deviations. Having selected the
measured value function the softkey
<ZERO>
will
appear. Press this key to save the measured
value displayed as
base value (see 12.6) and
reset to zero.
Select
measured value function (see 8.4) : 00: 23.4 °C
To select the zero-set measured value function press
<ZERO>.
The measured value will then show :
00: 00.0 °C and the symbol REL
.
The base value is then assigned the measured value :
base value: 23.4 °C
.
To cancel zero-set , then after pressing :
<ZERO>
hold the key down .
If the function is locked (see 12.4) the base value is not saved on the
connector but only temporarily to RAM where it is retained until the
device is next switched off. This status is indicated in the display by
the symbol
REL
; in other cases the symbol º appears.
If you prefer to disable the zero-set function completely, the channel
in question must be locked at level 6.
ALMEMO ® 2590 23
00: 23.4 °C
NiCr Temperatur REL
ZERO ESC F
