Amprobe WT-20 Manual De Uso página 10

7. Dip the probe into the sample container. Make
sure no air bubbles trapped in the slot of the
probe. To remove air bubbles, give the probe
a gentle stir. Making sure the electrode tip is
submerged when you stir it.
8. Stir the probe gently in the sample to create a
homogenous sample. Allow a few seconds to reach
temp. equilibrium. Wait about 15 minutes can get
a stable reading.
9. The unit of conductivity will flash on the LCD to
indicate the meter is in measurement mode. When
the reading is stable, the unit will stop flashing.
(Fig1)
10. Press "HLD" to freeze display. "Hold" will appear
on the LCD. (Fig.2) Press "HLD" again to release.
11. TDS Measurement:
In measurement mode, press "MODE" to switch
to DS mode. The unit of conductivity are uS or mS.
The unit of TDS are ppm or ppt.
Set the TDS conversion factor to right value. The
factory default is 0.50 To change the TDS factors,
refer Appendix A.
12. Turn off the meter by pressing "POWER" key.
Auto Power Off
This meter will shut off automatically 20 minutes of
inactivity. To disable the auto power off, pressing "SET"
+ "HLD" keys simultaneously while turning on the meter
until a "n" appeared on the screen and then release keys
to return to normal mode.(Fig.3)
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