Hanna Instruments HI 943500A - Manual (Page 21)

41 40
CONDUCTIVITY VERSUS
TEMPERATURE CHART
° C °F HI7030 HI 7031 HI 7033 HI 7034 HI7035 HI7039
(mS/cm) (mS/cm) (mS/cm) (mS/cm) (mS/cm) (mS/cm)
0 32 7150 7 7 6 64 48300 65400 2760
5 41 8220 8 9 6 65 53500 74100 3180
10 50 9330 1020 67 59600 83200 3615
15 59 10480 1147 68 65400 92500 4063
16 60.8 10720 1173 70 67200 94400 4155
17 62.6 10950 1199 71 68500 96300 4245
18 64.4 11190 1225 73 69800 98200 4337
19 66.2 11430 1251 74 71300 100200 4429
20 68 11670 1278 76 72400 102100 4523
21 69.8 11910 1305 78 74000 104000 4517
22 71.6 12150 1332 79 75200 105900 4711
23 73.4 12390 1359 81 76500 107900 4805
24 75.2 12640 1386 82 78300 109800 4902
25 77 12880 1413 84 80000 111800 5000
26 78.8 13130 1440 86 81300 113800 5096
27 80.6 13370 1467 87 83000 115700 5190
28 82.4 13620 1494 89 84900 117700 5286
29 84.2 13870 1521 90 86300 119700 5383
30 86 14120 1548 92 88200 121800 5479
31 87.8 14370 1575 94 90000 123900 5575
If you are calibrating HI 8931A or HI 943500A using HI 7030
(12.88 mS/cm @25°C) standard solution, turn the SLOPE trimmer
to display "12.88 mS", with a reference temperature of 25°C (77°F),
while for a reference temperature of 20°C (68°F), the SLOPE trimmer
should be adjusted to display "11.67 mS".
• If the LCD does not show "0", adjust the OFFSET trimmer.
• Pour at least 8 cm (3¼") of conductiv-
ity solution into a plastic beaker.
• Immerse the probe into the conductivity
solution, while paying attention that
the holes on the sleeve are completely
submerged.
• Tap the probe repeatedly on the bot-
tom of the beaker and stir it to ensure
that no air bubbles remain trapped
inside the sleeve.
• If the temperature of the probe is close to that of the solution, the
display will stabilize quickly and provide a temperature compen-
sated conductivity measurement.
Allow a few minutes if there is a temperature difference of about
5°C (9°F) or more for the ATC circuitry to compensate completely.
• When the reading stabilizes, turn the SLOPE trimmer on the
HI943500 front panel until the LCD reads the same value of the
calibration solution at 25°C (77°F), i.e.:
80.0 mS using HI 7034 with HI 943500A
12.88 mS using HI 7030 with HI 943500B
1413 μS using HI 7031 with HI 943500C
84.0 μS using HI 7033 with HI 943500D
• The calibration is now complete and the instrument is ready for
use. All subsequent measurements will be compensated to 25°C
(77°F).
• If the instrument will not calibrate refer to the "Probe Maintenance
and Cleaning" section on page 46.
8 cm (3¼")
HI 7030