Horiba Scientific LAQUA WQ-300 Series User manual

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

Measurement Modes
Dissolved Oxygen
Calibration Data
Dissolved Oxygen
Calibration
VIDEOVIDEO
Dissolved Oxygen Setup
Press
Press
Press
VIDEO
Real Time
VIDEO
Auto Stable
VIDEO
Auto Hold
Press up , left
right , or down
button to scroll
through settings
Press ENT button to
confirm settings
DO Setup
• Barometric Pressure
Compensation
• Salinity Compensation
•T
emperature Type
• CAL Data Clear
General Setup
• System Setup
• Stability Mode
• Stability Criteria
• System Info.
Membrane Info.
• Model
• SN
Membrane Coefficient
Press
LAQUA 300 Series DO Quick Guide - A5.indd 2 8/10/2019 1:57:42 PM