Omega CDH-SD11 User Manual page 8

Factor= Actual TDS ÷ Actual Conductivity @ 25 ℃
Solution
Water
Drinking water
Absolute pure water
Distilled water
To enter the factor by long press SET+UNIT, then short press MODE to toggle Cont I FtdS.
And go to select "tdS"and set the value.
HOLD: ↑to increase ADJ: ↓to decrease SET: ← to left digit CAL: → to right digit
Long press SET button to finish calibration, screen will show "SA". The adjustable range is 0.05 to 1.00.
Or to escape setting by long press SET+UNIT, the bottom of screen will show "ESC" few seconds and return
to normal measurement mode.
b) TDS measurement:
1) Under normal measurement mode, short press SET button to toggle Cond. measurement to TDS
measurement.
2) The measuring procedures are same as above 2-1-c (page 7) conductivity measurement, except to change
the display
unit from uS, mS to PPM, PPT.
Display will show TDS values at the same time the left bottom display will show the temp. value of the
measured solution.
NOTE: If the TDS value is ppm, the conductivity value must be in uS ; if the TDS value is in ppt, the
conductivity value
must be in mS.
2-3 Salt
a) Calibration
If the conductivity range already makes the calibration completely (refer to 2-1-b at page 6 ) then the
salt measurement is not necessary to make the calibration again.
b) Salt measurement
1) Under normal measurement mode, short press SET button to toggle Cond. measurement to "salt"
measurement mode.
2) Hold the Cond. electrode handle by hand and let the sensing head Immersed wholly into the measured
solution. Shake the probe to let the electrode's internal air bubble drift out from the sensing head.
Display will show salt values (ppt) at the same time the left bottom display will show the temp. value of the
measured solution.
Factor
0.55~0.8
0.64
0.055
0.5 ~ 1.0
6