PRODUCT INSTRUCTION SHEET
Page 2 of 8
Mechanical Installation
FIG. 3
Submersion Installation
Make a submersible conduit assembly using 1.5" F x 1" F
reducer and 1" pipe. On top of the pipe, mount a junction
box. with a 2-sided terminal strip. Thread the electrode onto the
reducer. Be sure to use sealing tape or paste. Attach the wires to
one side of the terminal strip and an extension cable to the other.
Match colors if using the same wires colors. See FIG 3.
In-Line Installation
Use pipe sealing tape or paste on the 1.5" threads near the
pH glass and salt bridge. Thread into user-supplied SCH80 1.5"
threaded tee. See FIG 4.
FIG. 4
6. Readings stabilize faster in some solutions than in others; allow
time for the readings to stabilize. In general, new pH electrodes
stable readings display in 10-15 seconds. ORP stability in
samples can take much longer.
7. All pH electrodes age with time. Aging is characterized by
shortened span and slower speed of response. Aging is best
detected by the two-point calibration method. If the pH meter
has manual or microprocessor slope (span) controls, the
controls can be adjusted to compensate for electrode span
errors (but will not affect the speed of response).
8. Salt bridge should be replaced when the electrode readings
cannot be corrected by the meter's controls and/or when their
speed of response is too slow for the application for which
they are being used. The frequency of electrode replacement
is a function of the application; electrodes operating in hot
liquids at very high or very low pH values will have shorter lives
than those operating at neutral pH and ambient temperature.
9. Coatings on an electrode's surface prevent new liquids from
contacting an electrode's measuring surface and can mimic the
effects of electrode aging. Before concluding that a salt bridge
needs replacing, check the pH glass surface for coatings by
removing the pH electrode cartridge and looking at the pH
glass.
10. Temperature affects electrode readings in two ways. First, the
output of an electrode varies with temperature. For pH elec-
trodes this effect can be corrected by automatic
temperature compensation (ORP/Redox readings are not
corrected for temperature effects). Secondly, the real pH or ORP
value, independent of the electrode measuring the value or use
of the temperature compensation, is temperature dependent.
Form: InstrSD7000-05 [Rev: 2016-08-15]
©2016 Sensorex Corporation
Electrode
1.5" x 1" reducer
1" pipe
Conduit box
Pipe sealing
tape
