Ahlborn ALMEMO 2490-1A, Руководство по эксплуатации

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12. Device configuration
28
Selecting the reference channel
Which channel is in fact to be output via which analog output can also be stipu-
lated by the user. To do this the parameters ´
ACh1
´, ´
ACh2
´, ´
ACh6
´, or ´
ACh7
´
must be configured as previously described.
Scaling the analog output
The output signal from each analog output variation (0 to 2 V) can be set for
each sensor to any partial range (e.g. 0 to 2 V for -30.0 to +120.0 °C). For the
previously specified reference channel, the values for analog output start and
analog output end plus analog output type can all be programmed.
First the analog output must be selected and then
the reference channel can be programmed (e.g.
M01) :
To select other parameters :
Analog output start by pressing :
MIN
(minimum value in measuring range)
Analog output end by pressing : MAX
(minimum value in measuring range)
To return to the reference channel press key:
M ▲ M ▲
To enter a value first press :
ON
and the 1st digit
starts flashing.
Each digit can be changed by pressing keys : M ▲ or M ▼ .
To use negative values below zero press:
M ▼
To delete parameters press :
CLR
To select the next digit, and terminate entry :
ON
....
To cancel or terminate configuration press:
MEM
12.3
Automatic switch OFF
In menu item ´ AOFF ´ the device can be programmed to switch OFF automatically
if no key is touched for a certain settable number of minutes; this will help save
the batteries. This automatic device switch OFF will not take effect if the setting
is ´- -´ or if a mains adapter or interface cable is connected. If the device is
powered from an external supply manual switch OFF can be prevented by se-
lecting the setting ´ noOFF ´. To switch OFF in this case the external power supply
would have to be unplugged.
12.4
Device locking
The measured value in the main field of the display can be manipulated by
pressing key
CLR
and setting it to zero. This function can be evaluated in
01
ACh1
ACh1
M
1
AE
100
.
0
M
1
A2
01
AS
0
.
0