- 21 -
6.3
Ion potential measurement
Connect ion probe and dip it in sample solution, stir the solution briefly and allow it to stay in the solution
until
icon appears and stays. The reading obtained is potential value of ion probe. If ion probe is
combination type, only need to insert it into “pH/mV” socket. If it’s not combination type, proper reference
electrode should be selected and insert it to “REF” socket. Two probles should be used at the same time.
7
Conductivity Measurement
7.1
Conductivity probe information
7.1.1 Using conductivity probe
The meter includes one plastic conductivity probe (Model 2301T-F, K=1.0). With built-in temperature
sensor, the meter can realize automatic temperature compensation. BNC plug of the probe is connected
to the meter’s conductivity socket while RCA plug is connected to the Temp socket. When the probe is
submerged in solution, stir the solution briefly to eliminate the air bubbles and in this way, a stable
measurement will be reached fast.
For other conductivity electrodes testing low or high range solutions, please refer to section 10.
7.1.2 Conductivity probe constant
The meter can use with conductivity probes with three constants (K=0.1, K=1.0 and K=10.0). Please refer
to chart-5 for the measuring range. Instrument constant can be set in parameter setting clause 2.1.
Chart -5 Probe constant and measuring range
Measuring
Range
＜
20 μS/cm
0.5μS/cm~100mS/cm
＞
100mS/cm
Conductivity
probe constant
K=0.1 cm
-1
K=1.0 cm
-1
K=10 cm
-1
Standard
solution
84μS/cm
84μS/cm
1413 μS/cm 12.88 mS/cm 111.8 mS/cm
7.2
Conductivity calibration related information
7.2.1 Conductivity calibration solutions
The meter uses Standard series and CH series conductivity solution. The meter can recognize the
standard solution automatically and perform 1~4 point calibration. The calibration icons at the bottom left
of LCD screen is corresponding to four built-in standard values. See chart – 6:
Chart -6 Conductivity standard solution series
Icons
Standard calibration solution
CH conductivity solution
84 μS/cm
146.6 μS/cm
1413 μS/cm
1408 μS/cm
12.88 mS/cm
12.85 mS/cm
111.8 mS/cm
111.3 mS/cm
