horiba LAQUA WQ-300 Series Quick Manual

Quick Guide
LAQUA WQ-300 Series
Handheld Meters
www.horiba-laqua.com
4. Press ENT button to con rm the DO reading. To abort calibration, press
MEAS button.
The meter will show DONE
briefl y then switch to
measurement mode. The
calibrated DO value and the
electrode icon will appear in
measurement mode.
5. Immerse the DO electrode in zero solution (0.2% sodium sul te) and repeat step
nos. 3 - 4 to perform zero calibration (optional).
Make sure that the DO cap and temperature sensor of the DO electrode are fully immersed in the zero
solution.
In step no. 3, CAL button must be pressed twice so that the meter will switch to zero calibration mode.
6. Rinse the DO electrode with clean water and wipe with lint-free tissue.
7. Immerse the DO electrode in sample.
Make sure that the DO cap and temperature
sensor of the DO electrode are fully
immersed in the sample.
P/N: 3200832950
LAQUA 300 Series DO Quick Guide - A5.indd 1
Dissolved Oxygen Calibration & Measurement
1. Rinse the DO electrode
with clean water and wipe
with lint-free tissue.
There should be no water droplets on
the DO cap and temperature sensor.
2. Place the DO electrode in water vapor-
saturated air (calibration bottle with moist
sponge) or in air-saturated water.
Two calibration modes are available in the
DO meter:
1. DO saturation (%)
2. DO concentration (mg/L)
The default mode is the former. Press
MODE button to switch to the latter.
3. Press CAL button on the meter to switch to
calibration mode.
100% is displayed at the bottom of the screen. The  icon
on the screen and the LED light on the electrode (if switched
on) will blink until the reading is stable.
Press
Press
CODE: GZ0000584707
8/10/2019 1:57:41 PM