Ahlborn ALMEMO 204, Operating Instructions Manual

Page: 46 / 72

15. Sensor programming
15.3 Averaging mode
The various averaging modes that can be defined via the Averaging mode
function are described in 14.2 and in the Manual, Section 6.7.4.
Function - no averaging:
Averaging mode -----
Averaging - start to stop or over individual measuring operations
CONT
Averaging - over all scans per output cycle
CYCL
To set the averaging mode s. 9.5:
Averaging mode
15.4 Locking the sensor programming
The functional parameters for each measuring point are protected by means of
the locking mode; this can be set to the desired locking level (see Manual
6.3.12). To enable programming the locking mode must first be lowered to an
appropriate level. If in the display there is a dot after the locking mode, this
means that programming cannot be modified.
Locking level Locked functions
0 none
1 measuring range + element flags + output mode
3 + units
4 + zero-point correction and gain correction
5 + base value, factor, exponential
6 + analog output, start and end
+ zero-point adjustment, temporary
7 + limit values, maximum and minimum
Function Locking mode :
Locking: 5
In the
Channel functions
menu the functions are listed from top to bottom and in
such a way that the locked functions cannot be selected.
15.5 Limit values
Two limit values (maximum and minimum) can be programmed per measuring
channel. Exceeding one of these limit values is treated as a fault (in the same
way as exceeding a measuring range limit or as sensor breakage). In the dis-
play, in front of the measured value affected, the appropriate arrow  or  ap-
pears and the alarm relays connected by relay cable are triggered (s. 17.2).
Limit values can also have relays assigned to them (s. 15.12.2). The alarm sta-
tus will remain in effect until the measured value returns to within the pre-
scribed limit values by the amount set as hysteresis. Hysteresis is set by de-
fault to 10 digits but this can be adjusted to any number of digits between 0 and
99 (s. 16.8). A limit value infringement can also be used to start or stop a mea-
suring operation (s. 15.12.2).
Function:
Enter the limit value, maximum (s. 9.5):
LV Max: 123.4 °C
Enter the limit value, minimum
LV Min: ----- °C
46 ALMEMO ® 204
CONT