Aquametrix P/R60 User Manual

P/R60 & P/R65 Page 1

OPERATING INSTRUCTION MANUAL

MODEL P/R60 & P/R65

DIFFERENTIAL PH & ORP PROBES

N116-19 REV. 14

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

Tel: [phone]

Toll Free: (855) PH-PROBE

Fax: [phone]

www.AquaMetrix.net

P/R60 & P/R65 Page 2

TABLE OF CONTENTS

1. GENERAL INFORMATION 4

2. SPECIFICATIONS 5

3. INSTALLATION 6

3.1. General Instructions 6

3.2. Connecting the P/R 60 to a Shark 6

3.3. Connecting the P/R 60 to a Shark TX/P 7

3.4. ORP 4-20 mA Probes, R65 8

3.5. Submersion Mounting Series 8 Differential Probes 8

3.6. Submersion Mounting Series 6 Differential Probes 9

3.7. Flow-through tee mounting Series 8 Differential Probes 9

3.8. Flow-through tee mounting Series 6 Differential Probes 9

3.9. Sanitary Probe P60S, P65S, R60S, R65S 10

3.10. Insertion mounting Series 4 Differential Probes 10

3.11. Hot/Wet tap insertion mounting Series 7 Differential Probes 10

4. SERVICE AND MAINTENANCE 10

4.1. Probe Cleaning 10

4.2. Replacement of Salt Bridge for Series 4, 6, 7 & S Differential Probes 11

4.3. Replacement of Salt Bridge for Series 8 Differential Probes 11

4.4. Storage 11

5. TROUBLESHOOTING AND SERVICE 12

5.1. Checking 5-wire Differential Probes P60 and R60 12

5.1.1. P60C pH probes 12

5.1.2. R60C ORP probes 12

5.2. Checking Probes P65 and R65 (4-20 mA output) 13

5.2.1. P65C pH Probe 13

5.2.2. ORP Probes R65 13

P/R60 & P/R65 Page 3

5.3. Customer Service 14

5.4. Parts and Accessories 14

5.5. Probe Return 14

6. DRAWINGS 15

6.1. N106-61 SERIES 4 DIFFERENTIAL pH/ORP PROBES 15

6.2. N106-183 SERIES 6 DIFFERENTIAL pH/ORP PROBES 16

6.3. N106-184 SERIES 7 DIFFERENTIAL pH/ORP PROBES 17

6.4. N106-182 SERIES 8 DIFFERENTIAL pH/ORP PROBES 18

6.5. N106-62 SERIES S DIFFERENTIAL pH/ORP PROBES 19

6.6. N105-73 INSTALLATION OF SERIES 6 DIFFERENTIAL PROBES 20

6.7. N106-79 INSTALLATION OF SERIES 7 DIFFERENTIAL PROBES 21

6.8. N105-72 INSTALLATION OF SERIES 8 DIFFERENTIAL PROBE 22

6.9. N106-60 INSTALLATION OF SALT BRIDGE IN A DIFFERENTIAL PROBE 23

P/R60 & P/R65 Page 4

1. 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. 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. INSTALLATION

3.1. General Instructions

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. Connecting the P/R 60 to a Shark

Improper wiring of the probe cable to the controller/transmitter will destroy the probe. Please follow
these guidelines:

a) Always power down the controller/transmitter BEFORE connecting the probe cable.

b) First connect the probe wires to the male and THEN insert the male connector into the female

connector inside the Shark. Do NOT insert the unwired male connector into the female
connector first and then connect the probe wires to the male connector.

c) For the Shark TX/P Transmitter: Make sure the transmitter is disconnected from the power

source before wiring the probe to the terminal strip on the back side of the transmitter.

d) Check the wiring. Use the diagrams below to insure that you’ve made the correct connections. If

connecting to a Shark controller, make sure that the male connector is inserted into the female
connector properly and that it is not offset.

e) Remember: Unplug it, wire it, check it and power it.

P/R60 & P/R65 Page 7

Figure 1 - Wiring a P/R 60 to a Shark controller

3.3. Connecting the P/R 60 to a Shark TX/P

a) Always power down the transmitter BEFORE connecting the probe cable.

b) Make sure the transmitter is disconnected from the power source before wiring the probe to the

terminal strip on the back side of the transmitter.

c) Check the wiring. Use the diagrams below to insure that you’ve made the correct connections.