Maintenance & Conditioning
12
Procedure
1. Press the
m
key then
CAL
virtual key to enter calibration mode.
2. Press
Process
, to enter process calibration.
3. Use the
ud
keys to adjust the value to the one determined with the calibrated portable meter.
4. When the reading is stable,
CFM
is displayed. Press
CFM
to save calibration.
“Wait” followed by “DONE” is displayed at the bottom of the screen.
Note
: Process calibration evaluates electrode offset.
11. MAINTENANCE & CONDITIONING
General Maintenance
• Inspect, clean, and calibrate the probe at regular intervals.
• Inspect all connectors for corrosion and replace if necessary.
• Inspect the cable. The connection cable must be intact.
• Calibrate the probe after prolonged storage or cleaning.
• After use rinse the probe with tap water and dry it.
Conditioning
• Remove the protective cap.
• Shake down the probe to eliminate any air bubbles inside the glass bulb.
• If the bulb and/or junction are dry, soak the electrode in
HI70300
Storage solution for at least 30 minutes.
• To ensure a quick response time, the glass bulb and the junction should be kept moist and not allowed to dry.
Install the probe in such a way that it is constantly in the flow cell or the pipe is filled with the sample.
This will ensure a quick response and will keep the junction moist.
Cleaning
New probe
• Remove the protective cap.
• Rinse off salt deposits with water.
Probe removed from process
1. Rinse the sensor in flowing water then
clean by soaking
in
HI7061
Electrode cleaning solution for general
use for 15 minutes or use an application-specific cleaning solution.
2. Rinse with water and soak in
HI70300
Storage solution for at least 30 minutes before reinstalling it.
3. Calibrate before use.
Storage
• When the pH probe is removed from the process for more than 1 hour, fill the protective cap with
HI70300
Storage solution and tighten the cap on the sensor. Do not store the probe in distilled or deionized water.