horiba LAQUA WQ-300 Series User manual

pH Calibration & Measurement
The set pH buffer group is displayed at the bottom of the
screen. The icon on the screen and LED light on the
electrode (if switched on) will blink until the reading is stable.
1. Rinse the pH electrode
with clean water and
blot using lint-free
tissue to remove
excess water.
2. Immerse the pH electrode in pH buffer.
3. Press CAL button on the meter to switch to
calibration mode.
4. Press ENT button to conrm the pH reading. To abort calibration, press MEAS button.
Perform 2-point calibration using
pH 7 and 4 for acidic sample or pH
7 and 10 for alkaline sample.
Perform 3-point calibration using
pH 7, 4, and 10 if you are unsure
of the expected sample value. It
is recommended to calibrate with
pH 7 first.
Make sure that the glass membrane and
junction of the pH electrode are immersed
in sample.
5. Repeat step nos. 1 to 4 to perform calibration with the next pH buffer(s).
6. Rinse the pH electrode with clean water and blot using lint-free tissue to remove
excess water.
7. Immerse the pH electrode in sample.
The meter allows up to 5 calibration points for USA, NIST, NIST10, Custom pH buffers and up to 6
calibration points for DIN pH buffers.
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 pH
value and the electrode
icon will appear in
measurement mode.
P/N: 3200832948 CODE: GZ0000584705
Press
Press
LAQUA 300 Series pH Quick Guide - A5.indd 1 8/10/2019 1:56:45 PM

Measurement Modes
VIDEO VIDEO VIDEO
Auto Stable Auto Hold Real Time
pH Calibration DatapH Calibration
VIDEOVIDEO
pH Setup
Press
Press
Press
Press
pH Setup
• pH Resolution
• Buffer Group
• CAL Alarm
• Temperature Type
• CAL Data Clear
Cartridge Info.
• Model
• SN
General Setup
• System Setup
• Stability Mode
• Stability Criteria
• System Info.
Press up , left
right , or down
button to scroll
through settings
Press ENT button to
confirm settings
LAQUA 300 Series pH Quick Guide - A5.indd 2 8/10/2019 1:56:45 PM