6.1.2 Differential measurement
If there are two sensors with the same units and same decimal point position
connected at measuring points M0 and M1, the difference M1 - M0 appears au-
tomatically below measuring point M3. The sensors are electrically isolated by
means of photovoltaic relays. If the differential channel is not required, it must
be deleted. If further differential channels are needed, these can be created via
the interface using the appropriate reference channels; (see Manual, Section
6.3.4).
6.1.3 Maximum and minimum value memories
From the measured values acquired per measuring point the highest and the
lowest values are determined and saved for each. To display these extremes
first the desired channel must be set and then the MAXIMUM VALUE or MINI-
MUM VALUE function selected by pressing the
FUNCTION
key.
maximum VALUE function ´
MH
´ and minimum VALUE function ´
ML
´
Select by the
FUNCTION...
key
...
FUNCTION
1: 1 2 3.4
MH
To delete the max./min. value:
,
PROG
CLEAR
1: - - - -
MH
As soon as the saved maximum / minimum value has been deleted, the current
measured value appears again immediately. The maximum / minimum values
are also automatically cleared with each start (see Chapter 6) or whenever the
measuring range is changed (see Section 7.7).
6.2 Measured value correction and compensation
For differential measuring operations based on a reference value, for measured
value correction based on sensor errors, and for scaling processes, there are
five programmable parameters available, namely zero-point correction ´
ZC
´,
gain correction ´
SC
´, base value ´
BA
´, factor ´
FA
´, and decimal point setting ´
EX
´;
(s. Manual, Sec. 6.3.10). These parameters can either be programmed (s.
Sec. 7.4, 7.5) or be automatically calculated in a sub-menu in the MEASURED
VALUE function including a few special functions (s. Sec. 6.2.1-3).
Function
Selection Display
Execute
Select meas. value and meas. point
M
▲
1:
12.34 °C
Set measured value to zero
(s. 6.2.1)
PROG
1:
`00.00´ CL
CLEAR
Zero-point correction
(s. 6.2.2)
▼
1:
`00.00´ AJ
PROG
or gain correction
1:
`10.00´ AJ
PROG
Enter setpoint val. -> factor / gain
(s. 6.2.3)
▼
1:
`12.34´ S4
PROG,
▲
/
▼
..
Entering the units
(s. 7.6)
▼
1:
12.34
`°C´
PROG,
▲
/
▼
..
24
ALMEMO
2390-5
Measuring operations
Содержание ALMEMO 2390-5
Страница 59: ...Your contact partners ALMEMO 2390 5 59 Appendix...
Страница 60: ...60 ALMEMO 2390 5 Appendix...
