Two-Point Adjustment
The scaling values can be automatically determined by using a two-point
adjustment. First, the measured value is, at its 'zero state' (ice water,
unpressurized etc.), set to zero within the function MEAS. VALUE by using the
keys
ENTER
,
CLEAR
(see 7.1.4).
The sensor is then brought to a defined nominal value (boiling water, known
weight etc.) and the nominal value is entered. For this purpose the key
ENTER
must be pressed and held (approx. 1s) within the function MEAS. VALUE until
the first digit of the measured value flashes. Then, by entering the nominal
value (see 5.3), the scaling value is calculated and the measured value is
indicated accordingly.
6.7 Locking the Programming of the Sensor
(man. 6.3.12)
The function parameters of each measuring point are protected by the locking
mode up to an adjustable locking level. Before any programming is performed
the locking mode must be correspondingly lowered. If a dot is indicated
following the locking mode on the display then a modification is not possible.
Locking Level
Locked Functions
0
none
1
measuring range + element flags
2
measuring range + zero point and slope correction
3
measuring range + dimension
4
+ zero point and slope correction
5
+ base value, factor, exponent
6
+ analogue output, start and end
7
+ limit values, max and min
Function:
Locking mode
(
LM
)
RANGE
Key:
Programming:
Input according to 5.3
If programmed, the element flags and the multiplexer settings are indicated on
the display next to the locking mode (see manual 6.10.2/3).
Keyboard locking and a locking code can be used to protect against
unauthorised modification (see 5.4) during a measurement and to protect the
programming and the process control .
F
1:0 0 0 5
LM
ALMEMO
®
2290-8
27
Sensor Programming
