Amprobe WT-50 Manual De Uso página 9

INTRODUCTION
Thank you for purchasing WT-50 Dissolved Oxygen meter. The meter measures
DO concentration with temperature compensation, salinity and pressure
correction, which is an accurate instrument for water quality testing. The
handy size and extension probe enables on-site testing and the memory and
PC link function are also ideal for data collection and processing.
Features
• Accurate dissolved oxygen measurement
• Salinity and barometric pressure compensation
• 100% air saturation calibration
• 99 point memory
• Real time clock for data record
• USB interface for data transmission
OPERATION
1. Press "POWER/SET" to turn on and off the meter.
2. Press "MODE" to select DO scale between % and ppm (or mg/l).
3. Perform 100% air saturation calibration before measurement. (See page 7)
If the stable readings (15 minutes after power on) are within 100%+/-0.5%,
then no need to do the calibration.
4. Salinity and barometric pressure have effects on DO accuracy. The meter
default is 760mmHg in pressure and 0.0ppt in salinity. Correct salinity
value of water and barometric pressure in Setup P3.0 if the conditions of
measuring site are different.
5. Immerse the probe head in the liquid and it display DO concentration on the
LCD. Automatic Temperature Compensation takes several minutes to
equalize temperatures of the probe and liquid and get stable readings.
6. Press "HLD/REC" in measuring mode to hold the current readings. HLD icon
will be displayed on LCD. Press the button again to resume measuring.
7. Press "HLD/REC" and "MNX/AV" simultaneously to activate backlight.
It turns off automatically after 10 seconds.
3