AquaMetrix 575, 585 Operating Manual

OPERATING INSTRUCTION MANUAL

MODEL 575 / 585

COMBINATIONAL PH AND ORP PROBES

N116-27 REV. 5.0

Water Analytics, Inc.
100 School Street
Andover, MA 01810

Tel: [phone]

[phone]

Fax: [phone]

www.WaterAnalytics.net

P575 AND R575 SERIES & P585 AND R585 SERIES

pH AND ORP PROBES

INSTRUCTION MANUAL

1.0 GENERAL INFORMATION

This manual covers all AquaMetrix P/R575 and P/R585 Series conventional combination pH and
ORP probes.

All mounting configurations are described.

Consult factory before using the sensor in extremely strong solvents such as ethylene dichloride.

Before placing the sensor into operation, remove the protective plastic cap. Store this cap for future
use.

NOTE: If the sensor is removed from the process for an extended period of time, thoroughly clean

the sensor, put a piece of cotton ball with few drops of water into the protective cap and
replace it on the sensor. This keeps the junction from drying out which causes slow
response when put back into operation or causes permanent damage to the sensor.

Sensors should not be left in dry lines or empty tanks for extended periods.

Do not store the sensors in a dry or humid location. When storing, check the protective cap
regularly to make sure the cotton ball remains moist. Improper storage of sensors voids the
warranty.

INSTALLATION DRAWINGS:

Located at end of Manual

N106-80 INSTALLIATION OF 575 / 585
SERIES COMBINATIONAL PROBES
SUBERMISION

N106-81 INSTALLIATION OF 575 / 585
SERIES COMBINATIONAL PROBES INLINE

P / R 575 & 585 Page 3

2.0 SPECIFICATIONS

MEASURING RANGES:

pH: 0.01 to 14.00 pH
ORP: -1000 to +1000 mV
Consult factory for applications below 2.5 and above

12)

WETTED MATERIALS:

575 Series
CPVC body, ceramic junction, glass electrode, RTV
sealant (plus platinum for ORP)

585 Series
Epoxy body, CPVC compression fitting, ceramic
junction, glass electrode, RTV sealant (plus platinum
for ORP)

TEMPERATURE LIMITS:

-5 to 80°C (23 to 176°F)

MAXIMUM PRESSURE:
100 psig at 65°C

TEMPERATURE COMPENSATION:
P/R585 and P/R575: Not provided
P585K and P575K: Automatic

MAXIMUM FLOW RATE:

3 meters (10 ft.) per second

STABILITY:

pH: 0.05 pH / day

Non-cumulative

ORP: 3.0 mV / day

Non-cumulative

SENSITIVITY:

pH: 0.01 pH unit
ORP: 1.0 mV

SENSOR CABLE:
3 meters (10 ft.) coaxial, terminated with ring, terminal
on centre wire, other wires are tinned.

3.0 INSTALLATION

3.1 General Instructions

3.1.1 Specific instructions for each type of probe are given in the following pages.
Common to all probes are the following instructions:

a) If the distance between the probe and the instrument is such that a direct

connection is not possible you will need a preamplifier, AquaMetrix Model 101A.
The box should be well sealed and away from corrosion danger. Be sure that
you have sufficient slack cable to allow for probe removal for calibration and
servicing.

b) Route the interconnect cable from the junction box to the instrument, preferably

in metal conduit. Do not run the power cable or control cables in the same
conduit with the probe interconnect cable.

c) Remove the protective plastic caps from the end of the probe before placing in

service.

d) For best results probes should always be mounted vertically with electrodes

down. If this is not possible, the probe must be at least 15° above horizontal.

e) Do not use a pipe wrench on the probe.

3.2 Submersion Mounting, P575 and P575K

3.2.1 A submersion mounting kit is available from Water Analytics which includes 4 ft. of
1” pipe, a 1 inch CPVC coupling and a strain relief fitting. Proceed as follows, either
with the kit or with your own hardware:

a) Apply a thread sealant to the thread on the cable end of the probe and screw a

1 inch coupling onto the probe. Route the probe cable through an appropriate
length of 1” pipe and, using thread sealant, screw the pipe into the reducer. A
cable strain relief fitting should be used on the upper end of the pipe. In the kits
a wire bracket is provided to aid in supporting the assembly. The process
should not be allowed to come in contact with the cable end of the probe.

3.3 Submersion Mounting, P585 and P585K

3.3.1 A submersion mounting kit is available from Water Analytics which includes 4 ft. of
1” pipe with a 3/4” NPT thread and a strain relief fitting. Proceed as follows, either
with the kit or with your own hardware.

a) Install the compression fitting components on the probe in the order shown in

the drawing on the next page so that the pipe thread is towards the cable end of
the probe.

b) Snug up the nut of the compression fitting to locate it in the desired position.

Hand tighten as much as possible, then turn 1/2 turn with a wrench.

c) Apply a thread sealant to the pipe thread portion of the compression fitting.

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.

4.2 Storage

4.2.1 Do not discard the protective cap that came with the sensor. If the sensor is
removed from the process for an extended period of time, thoroughly clean the
sensor, put a piece of cotton ball with few drops of water into the protective cap and
replace it on the sensor. This keeps the junction from drying out which causes slow
response when put back into operation or causes permanent damage to the sensor.

Sensors should not be left in dry lines or empty tanks for extended periods.

Do not store the sensors in a dry or humid location. When storing, check the
protective cap regularly to make sure the cotton ball remains moist. Improper
storage of sensors voids the warranty.

4.3 Customer Service

4.3.1 If a problem has not been resolved with the above procedures, a telephone
consultation with your AquaMetrix representative or directly with Water Analytics will
provide the answer.

Water Analytics Inc. Tel: [phone]
100 School Street Tel: [phone]
Andover, MA 01810 Fax: [phone]
Email: [e-mail]

4.4 pH Buffers and ORP Calibration Solutions

4.4.1 The pH Buffers and ORP Calibration Solutions are listed below. When ordering
parts please use the complete part number.

Description Part #

500 mL pH 7 Buffer Solution A35-14
4 L pH 7 Buffer Solution A35-118
500 mL pH 4 Buffer Solution A35-13
4 L pH 4 Buffer Solution A35-117
500 mL pH 10 Buffer Solution A35-24
4 L pH 10 Buffer Solution A35-119
200 (±20) millivolt solution, 500 mL A35-40
600 (±20) millivolt solution, 500 mL A35-41

4.5 Probe Return

4.5.1 If you are returning a probe for inspection, you must contact Water Analytics to
obtain an RMA (Return Material Authorization) Number. Enclose a description of the
problem, and MSDS sheets for the solution that the probe was installed in. Pack
the probe adequately to avoid damage to the glass electrode and ensure that it will
not be exposed to temperatures below –5°C. Water Analytics cannot be
responsible for shipping damage nor for damage due to frozen electrodes.

For safety reasons, Water Analytics cannot accept probes which have not been
thoroughly cleaned to remove all process material.