Chapter
5
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Conductivity Measurement Module
Resistivity Mode Menu
Main Menu
Settings
Details
Read Type
Auto-Read, Timed,
Single-Shot, Continuous
For Timed and Single-Shot, set the time in hours,
minutes, seconds using the arrow keys
Cell K
0.475
Enter the nominal cell constant (K) value of the
conductivity probe; value is used when
performing an automatic conductivity calibration
Ref. Temperature
5°C, 10°C, 15°C, 20°C,
25°C
Set the reference temperature
that all displayed
resistivity measurements will be reported to using
the selected temperature
compensation
Temp.
Compensation
Linear, nLFn, nLFu, EP, Off
Set the temperature
compensation type used to
calculate and report resistivity measurements at
the selected reference temperature
Temperature Coeff.
2.10
Enter the temperature coefficient value for linear
temperature compensation
Stability
Smart, Fast, Medium, Slow
Set when a measurement is recognized as stable
Averaging
Off,
Automatic Smart
Set averaging for faster measurement stability
Alarm
Limit Alarm
Off, On
Set high and low limit values to activate alarm
Set Point Alarm
Off, On
Set a base and offset value to activate alarm
Cell Type
Standard, USP
Select Standard for most conductivity probes or
USP for ultra pure water 2-cell conductivity probe
Detailed information on these features is available in the
Appendix
section of this user manual.
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Chapter
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Conductivity Measurement Module
Conductivity Calibration
One to six conductivity standards can be used for calibration (up to three for an automatic
conductivity calibration, up to six for a direct conductivity calibration and
one for a manual
conductivity calibration). Always use fresh standards and select standards that are near the
expected sample conductivity.
Automatic or Direct Conductivity Calibration
Prepare the conductivity probe according to the instructions in the probe user manual. Connect
the probe and any other electrodes to be used to the module inputs on the selected channel.
In the measurement mode, press the
channel key until the channel with the conductivity
module with conductivity probe connected is shown. If needed, press the
mode key until
Cond
Measurement is shown as the measurement mode.
For an automatic calibration, use the
Cell Constant Entry
procedure or
Conductivity Mode Menu
to enter the nominal cell constant of the conductivity probe before the calibration. Use Thermo
Scientific
™
Orion
™
100 μS/cm, 1413 μS/cm and/or 12.9 mS/cm conductivity standards.
1.
Press the
f1 (Cal) key to start the calibration.
a.
If more than one channel is displayed
in the measurement mode, press the
▲ or
▼
key to highlight the desired channel and press the
f3 (Select) key.
2.
Rinse the conductivity probe and any other electrodes in use with distilled water, blot dry
with a lint-free tissue and place into the standard.
3.
When the conductivity probe and standard are ready, press the
f3 (Start) key.
a.
If using a stirrer probe, the stirrer probe will start stirring when the
f3 (Start) key is
pressed and stop stirring when the reading stabilizes.
4.
Wait for the conductivity value on the meter to stabilize and perform one of the following actions:
a.
Press the
f2 (Accept) key to accept the displayed value.
or
b.
Press the
f3 (Edit) key, press the
f3 (Clear) key and use the numeric keypad to enter
the conductivity value of the standard at the measured temperature. Press the
f2 (Accept) key to confirm the entered value.
5.
Press the
f2 (Next) key to proceed to the next standard and repeat steps 2 through 4 or
press the
f3 (Cal Done) key to save and end the calibration.
6.
The meter will display the calibration summary and export the data to the calibration log.
Press the
measure (esc) key to proceed to the measurement mode.
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Chapter
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Conductivity Measurement Module
Conductivity Calibration Editing
Once the
f3 (Cal Done) key is pressed and the calibration is saved, press the
f2 (Cal Edit) key
to edit the calibration data and fix individual points without a full recalibration. In the calibration
edit mode, press the
▲ or
▼ key to highlight a calibration point and press the
f2 (Delete) key
to
delete the point or press the f3 (Re-Measure) key to re-measure the point. Follow the
onscreen text prompts and instructions to edit the selected calibration point.
Orion Conductivity Standard Values from 15 °C to 30 °C
Refer to the
Appendix
section of this user manual for additional values from 0 to 50°C.
Temperature
(°C)
Orion 111.9mS/cm
Standard
Cat. No. 011005,
01100510
(mS/cm)
Orion 12.9mS/cm
Standard
Cat. No. 011006,
01100610
(mS/cm)
Orion 1413μS/cm
Standard
Cat. No. 011007,
01100710
(μS/cm)
Orion 147μS/cm
Standard
Cat. No.
01100910
(μS/cm)
Orion 100μS/cm
Standard
Cat. No. 011008
(μS/cm)
15
92.34
10.46
1145
119
81
16
94.24
10.69
1171
122
83
17
96.15
10.93
1198
125
85
18
98.08
11.16
1224
127
87
19
100.0
11.40
1251
130
88
20
102.0
11.64
1277
133
90
21
103.9
11.88
1304
136
92
22
105.9
12.12
1331
138
94
23
107.9
12.36
1358
141
96
24
109.9
12.61
1386
144
98
25
111.9
12.85
1413
147
100
26
113.9
13.10
1441
150
102
27
115.9
13.35
1468
153
104
28
117.9
13.59
1496
156
106
29
120.0
13.84
1524
159
108
30
122.0
14.09
1552
161
110
Cell Constant Entry (Manual Conductivity Calibration)
1.
Press the
f1 (Cal) key to start the calibration.
a.
If more than one channel is displayed in the measurement mode, press the
▲ or
▼
key to highlight the desired channel and press the
f3 (Select) key.
2.
Press the
f2 (Cell K) key and wait for the cell constant value on the meter to stabilize.
3.
Press the
f2 (Accept) key to accept the displayed value or press the
f3 (Edit) key, press the
f3 (Clear) key, use the numeric keypad to enter the cell constant value of the conductivity
probe and press the
f2 (Accept) key to confirm the entered value.
4.
The meter will save the entered cell constant value as the nominal cell constant of the
conductivity probe and return to the main calibration display. Press the
measure (esc) key
to proceed to the measurement mode or perform the
Automatic
or Direct Conductivity
Calibration
procedure.
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