Hach Lange sensION+ EC71 Manual page 14

4. Operation
4.7. EC measurements
Measurement by stability
This is the default measuring mode for the sensION
Meanwhile the reading is in evolution, it appears on the display
momentary to orient the user. When the cell signal remains invar-
iable during a certain period of time, the reading is fixed on the
display, the reading is stable.
Stability criterion: 1 digit in 6 seconds.
If after 120 seconds the reading is not stable, the instrument
automatically passes in continuous measurement (the measured
value is displayed all the time).
To change measuring parameters see "Measure re-program-
ming", page 11.
Magnetic stirrer: the instrument controls automatically the
start/stop of the stirrer.
Continuous measurement
The instrument displays the value obtained by the electrode all
the time. These data can be stored or printed with program-
mable interval of time. To select this type of measurement see
"Re-programming measurement".
From the standard measuring mode (by stability), pressing twice
the key the measured value is shown on the display at any
moment but without option for data acquisition.
Measurement by time
The measurement is shown on the display after programmed
time. To select this measuring mode see "Re-programming meas-
urement".
Manual samples coding
+
With sensION ™
code (maximum 15 characters) per each sample using an external
PC key board or bar code. See SYSTEM, page 17.
10-04-2010
EC MEASURE
New calibration
in 15 days
By stability
...
Start measurement
by STABILITY
Sample:
_
MEASURE
by stability
* * *
uS/cm @25˚C
Sample 1
etc.
10
sensION+ EC71 HACH LANGE 7010.indd ANG:10 sensION+ EC71 HACH LANGE 7010.indd ANG:10
™
it is possible to introduce specific
EC 71
17:45
Manual coding: introduce
the code for the sample.
A PC keyboard is required.
MEASURE
(continuous)
21,4˚C 21,4˚C
825
uS/cm @25˚C
00:01 Sample 1 00:01
etc.
With connected temperature probe.
10-04-2010
+
.
EC 71
EC MEASURE
New calibration
in 15 days
By stability
...
Start meas. EC
MEASURING
* * *
uS/cm @25˚C
Sample 1
MEASURING
* * *
uS/cm @25˚C
Stirring
Sample 1
MEASURING
* * *
uS/cm @25˚C
Sample 1
STABLE MEASUREMENT
1215
uS/cm @25˚C
Sample 1
Next sample
Press ESC to quit measurement
Manual introduction of the temperature
MEASURING
* * *
uS/cm @25˚C
Sample 1
MEASURING
* * *
uS/cm @25˚C
Sample 1
MEASURING
* * *
uS/cm @25˚C
Sample 1
MEASURING
* * *
uS/cm @25˚C
Sample 1
MEASURING
* * *
uS/cm @25˚C
Stirring
Sample 1
etc.
17:45
Press to re-program
measurement. see page 11.
Pressing twice measure-
ment in continuous.
MEASURING
by stability (continuous)
21,4˚C 21,4˚C
825
uS/cm @25˚C
00:01 Sample 1 00:01
To vary stirring speed
MEASURING
by stability (continuous)
21,4˚C 21,4˚C
830
uS/cm @25˚C
30% Stirring 30%
00:05 Sample 1 00:05
MEASURING
by stability (continuous)
21,4˚C 21,4˚C
831
uS/cm @25˚C
00:10 Sample 1 00:25
HOLD
21,4˚C
21,4˚C
831
uS/cm @25˚C
Sample 1 00:28
00:25
Next sample
MEASURING
by stability (continuous)
21˚C 21˚C
825
uS/cm @25˚C
00:01 Sample 1 00:01
MEASURING
by stability (continuous)
21˚C 21˚C
825
uS/cm @25˚C
00:01 Sample 1 00:01
MEASURING
by stability (continuous)
19˚C 19˚C
825
uS/cm @25˚C
00:05 Sample 1 00:05
MEASURING
by stability (continuous)
19˚C 19˚C
825
uS/cm @25˚C
00:10 Sample 1 00:25
MEASURING
by stability (continuous)
21,4˚C 21,4˚C
830
uS/cm @25˚C
30% Stirring 30%
00:25 Sample 1 00:28
etc.
8/7/10 16:14:51 8/7/10 16:14:51