Omega PHE/ORE Series manual Replacement parts and accessories, Cleaning, Mfr. Part No Description

5.2 Cleaning

Cleaning techniques vary depending on the type of coating present on the glass electrode surface or reference junction.

•Soft coatings can be removed by vigorous stirring, or with directed spray of an applicable detergent or solvent onto the glass electrode surface. Chlorine bleach or mild detergent may be used to remove soft coatings. Always rinse electrode tip in clean water after cleaning.

•Hard coatings can be chemically removed. Use the least harsh chemical which will remove the contaminant within two (2) minutes without attacking the materials of construction. e.g. calcium carbonate may be removed with a 5% HCL (muriatic acid) solution.

•Oily or organic coatings can be removed with detergents or an appropriate solvent that does not attack the materials of construction e.g. isopropyl alcohol may be used but acetone must be avoided to prevent damage to the CPVC sensor body.

•ORP electrode surface (platinum rod) can be gently sanded with 600 grit wet and dry silicone or carbide sandpaper, jewelers rouge, crocus cloth, or very fine steel wool.

WARNING!

Wear appropriate eye, face, hand, body, and respiratory protection when using chemicals or solvents.

6. Replacement parts and accessories

Mfr. Part No.	Description
PHE-3271	Flat pH Electrode
PHE-3271-HF	Flat pH Electrode, HF Resistsant
ORE-2715	Flat ORP Electrode
PHE-2716	Bulb pH Electrode
PHE-2716-DI	Bulb pH Electrode, DI Resistant
ORE-2717	Bulb ORP Electrode
PH-270-PA	Preamplifier, 3/4 in. NPT
P31515-0V200	PVDF Pipe Adapter
FPP-1220-0021	O-ring, FPM (standard)
FPP-1224-0021	O-ring, EPR
FPP-1228-0021	O-ring, Kalrez

CAUTION!

Apply O-ring lubricant to sensor O-rings prior to assembly.

Unlubricated O-rings may score the sealing surface in the 2720.

Technical Features
a)	Male BNC connector	i)	3K Balco thermistor
b)	Keyed for a simple sure fit	j)	Solidified acrylamide reference
c)	Viton® O-rings		electrolyte
d)	Silicone-bushing seal	k)	Ag/AgCl measuring element
e)	Double junction	l)	Large reference volume
f)	Ag/AgCl reference element	m)	Epoxy seal
g)	Platinum sensing surface (ORP) or flat pH glass	n)	Shielding
h)	Porous UHMW polyethylene reference junction	o)	10KΩ I.D. resistor for ORP sensor

a	b
o	c
n
m	d
	c
l

k

j

i	e
	f
h	g

page 6 OMEGA PHE/ORE Series pH/ORP Electrode Instructions