10. Measuring using Measuring-Menus
31
1. Setting up a means of calibration for the zero point:
Select function
Setpoint 1
:
Setpoint 1:
07.00
pH
Zero point adjustment
with key:
<ADJ>
The adjustment meas. value is recorded:
00:
07.00
pH º
In the case of pH probes, the standard values, base value 7.00 and
slope -0.1689, can be restored by pressing the key
<CLEAR>
.
2. Setting up a means of calibration for the slope:
Select function
Setpoint 2
:
Setpoint 2:
10.00
pH
Slope adjustment
with key:
<ADJ>
The adjustment meas. value is recorded:
00:
10.00
pH º
The slope shows approximately:
Slope:
-0.1689
The
slope error
shows the deviation from the no-
minal value and therefore the state of the probe:
Slope error: 9 %
If the sensors are locked, they can be momentarily unlocked by
pressing the key
<FREE>
.
10.2.4
Two-point Adjustment with Setpoint Entry
In the menu
U1 Meas.Correction
a two-point adjustment is also possible for
other sensors. Additionally to the zero point adjustment 10.2.2 , the slope can
be corrected with a second measuring point using the function
Setpoint
. Press-
ing a button, the correction factor is automatically determined and stored in the
sensor connector.
1. Zero point adjustment
Set sensor to the
zero state
(ice water, unpressurized etc.),
Set the meas. value to zero by using (s. 10.2.2).
<ZERO>
/
<ADJ>
,
PROG
2. Final value adjustment
Put sensor to a defined
setpoint
00: 098.7 °C
((boiling water, known weight etc.)
At
ALMEMO force transducers,
switch on/off the calibration resistor
(simulation of the control value) (s. man. 3.6.2) with:
<ON>
or
<OFF>
Enter the
setpoint
in function ´Setpoint´:
Setpoint: 100.0 °C
Calibrate
the meas. value in function ´Setpoint´:
<ADJ>
Afterwards, the meas. val. should indicate the set point.
00: 100.0 °C
If the sensor is locked with 4 or momentarily unlocked with the
key
<FREE>
, the correction factor is programmed as ´factor´. If the
locking level is set <= 3, the correction factor is programmed as
slope correction (s. 11.3.7).
Содержание ALMEMO 2690-8A
Страница 7: ...2 Table of Contents 7 14 1 Technical Data 81 14 2 Product overview 82 14 3 Index 83 Your contact 88...
Страница 80: ...80 13 DECLARATION OF CONFORMITY...
Страница 86: ...Notes 86...
Страница 87: ...Notes 87...
