AquaMetrix P60, R60, P65, R65 Operating Manual

P/R60 & P/R65 Page 1

OPERATING INSTRUCTION MANUAL

MODEL P/R60 & P/R65

DIFFERENTIAL PH & ORP PROBES

N116-19 REV. 10

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

Tel: [phone]

[phone]

Fax: [phone]

www.WaterAnalytics.net

P/R60 & P/R65 Page 2

TABLE OF CONTENTS

1.0 GENERAL INFORMATION 4

2.0 SPECIFICATIONS 5

3.0 INSTALLATION 6

3.1 General Instructions 6

3.2 ORP 4-20 mA Probes, R65 6

3.3 Submersion Mounting Series 8 Differential Probes 6

3.4 Submersion Mounting Series 6 Differential Probes 7

3.5 Flow-through tee mounting Series 8 Differential Probes 7

3.6 Flow-through tee mounting Series 6 Differential Probes 7

3.7 Sanitary Probe P60S, P65S, R60S, R65S 7

3.8 Insertion mounting Series 4 Differential Probes 8

3.9 Hot/Wet tap insertion mounting Series 7 Differential Probes 8

4.0 SERVICE AND MAINTENANCE 8

4.1 Probe Cleaning 8

4.2 Replacement of Salt Bridge for Series 4, 6, 7 & S Differential Probes 9

4.3 Replacement of Salt Bridge for Series 8 Differential Probes 9

4.4 Storage 9

5.0 TROUBLESHOOTING AND SERVICE 9

5.1 Checking 5-wire Differential Probes P60 and R60 10

5.2 Checking Probes P65 and R65 (4-20 mA output) 11

5.3 Customer Service 12

5.4 Parts and Accessories 12

5.5 Probe Return 13

6.0 DRAWINGS 14

P/R60 & P/R65 Page 3

6.1 N106-61 SERIES 4 DIFFERENTIAL pH/ORP PROBES 14

6.2 N106-183 SERIES 6 DIFFERENTIAL pH/ORP PROBES 15

6.3 N106-184 SERIES 7 DIFFERENTIAL pH/ORP PROBES 16

6.4 N106-182 SERIES 8 DIFFERENTIAL pH/ORP PROBES 17

6.5 N106-62 SERIES S DIFFERENTIAL pH/ORP PROBES 18

6.6 N105-73 INSTALLATION OF SERIES 6 DIFFERENTIAL PROBES 19

6.7 N106-79 INSTALLATION OF SERIES 7 DIFFERENTIAL PROBES 20

6.8 N105-72 INSTALLATION OF SERIES 8 DIFFERENTIAL PROBE 21

6.9 N106-60 INSTALLATION OF SALT BRIDGE IN A DIFFERENTIAL PROBE 22

7.0 SENSOR WARRANTY ERROR! BOOKMARK NOT DEFINED.

P/R60 & P/R65 Page 4

1.0 GENERAL INFORMATION

This manual covers all AquaMetrix P60, P65, R60 and R65 Series differential measurement pH and
ORP probes.

All mounting configurations are described.

Both those probes with encapsulated preamplifiers and those with encapsulated two-wire
transmitters are covered. If your probe has five wires it has an encapsulated preamplifier (P60 and
R60). If your probe has two wires, or in the case of an ORP probe four wires, it has an
encapsulated two-wire transmitter (P65 and R65).

The output from a two-wire transmitter type is non-isolated and un-calibrated. The system must
provide 24 Vdc, with “low” isolated from earth ground, and a means of calibrating for offset and
span.

NOTE: Do not discard the protective cap(s) 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(s) regularly to make sure the cotton ball remains moist. Improper storage of sensors
voids the warranty.

P/R60 & P/R65 Page 5

2.0 SPECIFICATIONS

MEASURING RANGES:

pH: 0 to 14.00 pH
ORP: R60: +1999 mV
R65: 0-1000 mV / +500 mV field

selectable

FLOW RATE:

10 ft./sec max. Flow should be as low as
possible in low conductivity water and in
solutions with high suspended solids

WETTED MATERIALS:

P60/P65: CPVC, kynar/ceramic, glass,

titanium palladium alloy and EPDM

R60/R65: CPVC, kynar/ceramic, glass,

titanium palladium alloy, EPDM, and
platinum

TRANSMISSION DISTANCE:
5-wire Probes: 900 meters (3000 ft.)

2-wire Probes: Limited only by cable

resistance and voltage of power supply

SENSITIVITY: pH: Less than 0.005 pH

ORP: Less than 0.5mV

STABILITY: 0.03 pH / 2mV per day,
non-cumulative

PRESSURE LIMIT: 100 psig @ 65°C
40 psig @ 95°C

TEMPERATURE LIMITS: -5 to 95°C

(23 to 203°F)

POWER SUPPLY LIMIT:
24VDC ± 4V

PROBE CABLE: 15 ft. (4.6 m)

AUTOMATIC TEMPERATURE
COMPENSATION:

-5 to 95°C (23 to 203°F)

P65C:
OUTPUT SPAN: 1.14mA / pH
OUTPUT OFFSET: 12mA @ 7pH
+1.14mA
MAX LOAD: 450 Ohms
R65C:
OUTPUT SPAN:
0-1000mV: 1.6mA / 100mV
+500mV: 1.6mA / 100mV
OUTPUT OFFSET:
0-1000mV: 12mA @ 500mV +1mA
+500mV: 12mA @ 0mV +1mA
MAX LOAD: 450 Ohms

P/R60 & P/R65 Page 6

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, the probe cable should be routed to a junction box
with a terminal strip (AquaMetrix Part No. JB1). 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.

3.2 ORP 4-20 mA Probes, R65

3.2.1 a) ORP 4-20 mA probes have four wires; black, red, green and white. The red

wire is to be connected to the +24 Vdc terminal and the back wire to the 24 Vdc
common terminal via the load in the loop.

b) For an instrument with a range of 0 to 1000 mV the green and white wires are

to be shorted.

c) For an instrument with a range of –500 to 500 mV the green and white wires

are to be isolated from each other.

3.3 Submersion Mounting Series 8 Differential Probes

Refer to Dwg# N105-72

3.3.1 a) A submersion mounting kit, STC60L is available from Water Analytics which

includes 4 ft. of 1” pipe, 1-1/2” x 1” reducer, a strain relief fitting and wire
mounting bracket. Proceed as follows, either with the kit or with your own
hardware.

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

1-1/2” x 1” NPT reducer onto the probe. Route the sensor cable through an
appropriate length of 1” pipe and using thread sealant, screw the pipe into the
reducer. The cable end of the probe should not be exposed to the process. 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.

NOTE: An optional protective shroud, Part No. PROTECTOR-3 should be used on

the electrode end of the probe to protect the electrodes from accidental
contact with the tank bottom, sides or objects in the process.

P/R60 & P/R65 Page 7

3.4 Submersion Mounting Series 6 Differential Probes
Refer to Dwg# N105-73

3.4.1 a) A submersion mounting kit, STC60-6 is available from Water Analytics which
includes 4 ft. of 1” pipe, 1-1/2” x 1” reducer and a strain relief fitting. Proceed as
follows, either with the kit or with your own hardware:

b) Install the optional protective shroud, Part No. PROTECTOR-6 on the probe by

threading the probe cable through it. The shroud will contact the shoulder on
the probe.

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

the drawing below so that the pipe thread is towards the cable end of the probe.
If you are concerned that the shroud may get pushed up and expose the
electrodes you can lock it down by the positioning of the fittings.

d) 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.

e) Apply a thread sealant to the pipe thread portion of the compression fitting and

screw a 1-1/4” x 1” NPT reducer to it.

f) Route the sensor cable through an appropriate length of 1” pipe and using

thread sealant, screw the pipe into the reducer on the probe. The cable end of
the probe should not be exposed to the process.

3.5 Flow-through tee mounting Series 8 Differential Probes

Refer to Dwg# N105-72

3.5.1 a) Apply pipe sealant to the electrode end of the probe and screw it into the
AquaMetrix union tee w/ adaptor (Part No. AM-MH538N9A) or any standard 1­1/2” NPT tee.

3.6 Flow-through tee mounting Series 6 Differential Probes

Refer to Dwg# N105-73

3.6.1 a) Take the compression fitting apart. Apply pipe sealant to the 1-1/4” NPT thread
and screw this part into a 1-1/4” tee. A larger tee with an appropriate reducer
may be used.

b) Put the compression fitting components on the probe in the order shown in the

drawing. 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.

c) 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 1/2 turn with a wrench.

3.7 Sanitary Probe P60S, P65S, R60S, R65S

3.7.1 The P60S is designed with a stainless steel flange to mate with a Tri-Clover ferrule
TL14AM7-2-1/2.