Handy Polaris – Instruction Manual
1 General
The OxyGuard Handy Polaris is a hand-held battery powered dissolved oxygen (DO) meter.
It measures mg/l (ppm), % saturation, temperature, has salinity compensation and automatic
compensation for temperature and barometric pressure. The probe is fully field serviceable.
The instrument can withstand wet conditions and being dropped in the water!
The Polaris is very easy to use. The arrow buttons allow you to move round in the actual
display, the "OK" button moves to the next level and the "ESC" button moves back. To turn
the Polaris on or off hold the on/off button depressed for 3 seconds. The instrument will
turn off automatically if no button is pressed for the auto shutdown time.
Use the arrow buttons to select which parameter is shown in large figures. If the Polaris shows
a setup display and you want to measure, press "Esc" one or more times to make it show the
measurement display.
If an error condition occurs then "Error", "Warning" or "Calibrate" will blink in the display. The
Polaris will show more information in the status list window. See Status List.
To measure DO, turn the Polaris on and immerse the probe in the water. If there is no flow
past it move the probe slowly – 5–10 cm/sec is enough. When you are finished using the
Handy rinse the probe in clean water. Wipe the meter dry if it is wet.
To calibrate, or check the calibration, make sure the probe has the same temperature as the
air.
Store the Handy in its pouch at a stable temperature overnight and check the reading in the
morning.
In water the probe adjusts to change in temperature in a minute or two, but in air it can take an
hour.
Page 4 of 12 220416IM-Iss03 Issue Date 22/04/2015
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