Metex P/R575 Fixed Insertion, Combination Style pH/ORP Sensors User Manual
Page 5
P / R 575 & 585
Page
4
d) Route the sensor cable through an appropriate length of 1” pipe and using
thread sealant, screw the pipe onto the reducer on the probe. The process
should not be allowed to come in contact with the cable end of the probe.
REFER TO DWG# N106-80
3.4 Flow-through tee mounting P575 and P585
3.4.1
Apply pipe sealant to the electrode end of the probe and screw it into a standard 1
1/2” NPT tee.
3.5 Flow-through tee mounting P585 and P585
3.5.1
Take the compression fitting apart. Apply pipe sealant to the 3/4” NPT thread and
screw this part into a 3/4” tee. A larger tee, such as 1” NPT as shown in the
drawing on the next page, with an appropriate reducer may be used.
3.5.2 Put the compression fitting components on the probe in the order shown in the
drawing on the next page. They should be in such a position that the electrodes will
be in the pipe stream but not touching the opposite side of the tee.
3.5.3 Remove the protective cap from the probe and place the probe in the tee. Now
tighten the nut by hand as much as possible, then turn ½ turn with a wrench.
REFER TO DWG# N106-81
4.0
SERVICE
AND
MAINTENANCE
4.1 Probe Cleaning
4.1.1
The probe should be kept reasonably clean to avoid measurement errors.
Frequency of cleaning can only be determined by experience. To clean proceed as
follows:
a) Rinse with clean warm water.
b) Soak the end of the probe in warm water and dish detergent for 3 or 4 minutes.
c) Brush the end of the probe with a soft bristle brush such as a tooth brush. Take
care not to scratch the glass electrode.
d) If the probe is still not clean, it may have to be cleaned with acid. CAUTION:
Do not acid clean probes used in processes containing cyanide solutions.
Some experimentation may be required to determine the most suitable acid for
your process. Use the most dilute acid which is effective.
e) Soak the probe for not more than 5 minutes in the chosen acid: then rinse
thoroughly with clean warm water.
f) Calibrate the system in accordance with the instrument instruction manual.