Delta OHM HD3406.2, User Manual, Page: 17 / 44

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10. The cell constant nominal value (KCELL) and the temperature coefficient
α
T
set to 0 are dis-
played. Pressed repeatedly the ENTER key allows the calibration on the point to be repeated,
for example, in order to obtain a more stable value.
11. To end the probe calibration, press ESC.
12. Go back to the MENU and select ALPH: re-enter the temperature coefficient as it was before
the calibration.
13. Rinse the probe with water. If you are then going to perform low conductivity measurements,
we recommend rinsing the probe using distilled or bidistilled water.
The instrument is now calibrated and ready for use.
NOTES:
•
Without having pressed ENTER at all, the calibration is interrupted by pressing ESC; the
previous values will continue to be used.
•
Upon confirming the calibration by using ENTER, the instrument checks that the correction to
the conductivity does not exceed the 70% or 150% limits of the theoretical value. If the calibra-
tion is rejected because it is considered to be excessively corrupted, the
CAL ERR message will
appear, followed by a long beep. The instrument remains in calibration mode and maintains the
previous calibration values.
•
The most frequent causes of error are due to the probe malfunctioning (deposits, dirt,…) or to the
standard solutions deterioration (bad preservation conditions, alteration due to pollution with dif-
ferent conductivity solutions,…).
•
If the measurement is in TDS, resistivity or salinity, on the pressing of CAL, the instrument goes
automatically in conductivity calibration.
Table of standard solutions at 147
μ
S/cm, 1413
μ
S/cm, 12.88mS/cm and 111.8mS/cm
The table reports the standard solutions automatically detected by the instrument according to tem-
perature.
°C µS/cm µS/cm mS/cm mS/cm °C µS/cm µS/cm mS/cm mS/cm
15.0
121 1147 10.48 92.5
26.0 150 1440 13.13 113.8
16.0 124 1173 10.72 94.4 27.0 153 1467 13.37 115.7
17.0 126 1199 10.95 96.3 28.0 157 1494 13.62 117.7
18.0 128 1225 11.19 98.2 29.0 161 1521 13.87 119.8
19.0 130 1251 11.43 100.1 30.0 164 1548 14.12 121.9
20.0 133 1278 11.67 102.1 31.0 168 1581 14.37 124.0
21.0 136 1305 11.91 104.0 32.0 172 1609 14.62 126.1
22.0 138 1332 12.15 105.9 33.0 177 1638 14.88 128.3
23.0 141 1359 12.39 107.9 34.0 181 1667 15.13 130.5
24.0 144 1386 12.64 109.8 35.0 186 1696 15.39 132.8
25.0 147 1413 12.88 111.8