Instruction Sheet
General Purpose pH/ORP Sensor Sensors
LIQ_MAN_ABR_3900
October 2014
General Purpose pH/ORP Sensor
Specifications
Figure 1. 3900 Insertion/Submersion Sensor
Sensor Type: General purpose 3900
Measured Range:
pH AccuGlass 0-14
ORP -1500 to +1500 mV
Percent Linearity Over pH Range:
RangeLinearity
0-7
97%
1-7
98%
4-7
98%
7 - 10 99%
7 - 12 97%
7 - 13
96%
7 - 14 95%
Operating Temperature: -10° to 100°C (14° to 212°F)
Automatic temperature compensation -10° to 100°C (14°
to 212°F)
Maximum Pressure: 790 kPa [abs] (100 psig) at 100°C
(212°F) CRN rating: 60 psig up to 100°C (212°F).
Materials of Construction: stainless steel, glass, Teflon,
polyphenylene sulfide (PPS), and EPDM
Materials of ORP: Platinum
Process Connections:
Front facing: 3⁄4˝ and 1˝ MNPT
Rear facing: 1˝ MNPT
Integral Cable: 32 ft (10m) cable with integral SMART
preamp; 15 ft (4.7m) cable without preamp sensor
VP8 Cable: use 24281-XX, 2.5 ft (.8m) to 100 ft (31m)
Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb)
OPERATIONAL NOTE
The 3900 Sensor responds to changes in pH at a minimum conductivity of 0.1mS/cm in deionized water. Sample flow rate must be
controlled to 2 gph (7.6L/hr). The offset is approximately -0.2 pH after 3 months at ambient temperature.
CAUTION: SENSOR/PROCESS APPLICATION COMPATIBILITY
The wetted sensor materials may not be compatible with process com position and operating conditions. Application compat ibility
is entirely the responsibility of the user.
WARNING
Before removing the sensor, be absolutely certain that the process pressure is reduced to 0 psig and the process temperature is
lowered to a safe level!
General Purpose pH/ORP Sensor
Instruction Sheet
October 2014
LIQ_MAN_ABR_3900
CAUTION
The solution used during calibration is an acid and should be handled with care. Follow the directions of the acid manufacturer. Wear
the proper protective equipment. Do not let the solution come in contact with skin or clothing. If contact with skin is made, immediately rinse with clean water.
ATEX DIRECTIVE: Special Conditions for safe use
1. All pH/ORP sensors have a plastic enclosure which must only be cleaned with a damp cloth to avoid the danger due to a build up of
an electrostatic charge.
2. All pH/ORP sensor models are intended to be in contact with the process fluid and may not meet the 500V r.m.s. a.c. test to earth.
This must be taken into consideration at installation.
Storage
1. It is recommended that electrodes be stored in their
original shipping containers until needed.
2. Do not store at temperatures below -10°C (14°F).
3. Electrodes should be stored with a protective cap
containing KCl solution (PN 9210342).
4. For overnight storage, immerse the sensor in tap
water or 4 pH buffer solution.
5. pH glass electrodes slowly deteriorate in storage. There
is no specific expiration date. However, the calibration
procedure described below should be followed to
determine that the sensor calibrates properly.
Electrode preparation
1. Remove electrode from shipping container.
2. Remove the protective boot covering the electrode bulb.
3. Rinse away salt film with clean water, then shake the
electrode so that the internal solution fills the bulb,
thus removing any air trapped there.
Installation
For sensor orientation, see Figure 2.
For sensor dimensions, see Figure 3.
For mounting options, see Figures 4-7.
For wiring, see Figures 8-41.
For additional wiring information, please visit our website
at www.emersonprocess.com/raihome/liquid/wiring.
Wrap the sensor threads with six or seven (6–7) turns of
Teflon tape to prevent leakage. Do not over tighten the
sensor into it’s receptacle. Hand tighten the sensor, and
then tighten one or two (1–2) turns with a wrench.
Two point buffer calibration
Select two stable buffer solutions, preferably pH 4.0 2
and 10.0 (pH buffers other than pH 4.0 and pH 10.0 can be used as long as the pH values are at least two pH units apart).
NOTE: A pH 7 buffer solution reads a mV value of approx.
zero, and pH buffers read approximately ± 59.1 mV for
each pH unit above or below pH 7. Check the pH buffer
manufacturer specifications for millivolt values at various
temperatures since it may affect the actual value of the
buffer solution mV/pH value.
1. Immerse sensor in the first buffer solution. Allow
sensor to equilibrate to the buffer temperature (to
avoid errors due to temperature differences between
the buffer solution and sensor temperature) and wait
for reading to stabilize. Value of buffer can now be
acknowledged by analyzer/ transmitter.
2. Once the first buffer has been acknowledged by the
analyzer/transmitter, rinse the buffer solution off of
the sensor with distilled or deionized water.
3. Repeat steps 1 and 2 using the second buffer
solution.
4. The theoretical slope value, according to the Nernst
equation for calculating pH, is approximately 59.1
mV/pH. Over time the sensor will age, both in the
process and in storage, which will result in reduced
slope values. To ensure accurate readings, it is
recommended that the electrode be replaced when
the slope value falls below 47 to 49 mV/pH.
Recommended pH Sensor
Standardization
For maximum accuracy, the sensor can be standardized
on-line or with a process grab sample after a buffer
calibration has been performed and the sensor has been
conditioned to the process. Standardization accounts
for the sensor junction potential and other interferences.
Standardization will not change the sensor’s slope but
will simply adjust the analyzer’s reading to match that of
the known process pH.
Instruction Sheet
General Purpose pH/ORP Sensor Sensors
LIQ_MAN_ABR_3900
October 2014
Maintenance for pH electrode
Figure 2. Sensor Orientation
Electrodes should respond rapidly. Sluggishness, offsets,
and erratic readings are indicators that the electrodes
may need cleaning or replacement.
1. To remove oil deposit, clean the electrode with a mild
non-abrasive detergent.
2. To remove scale deposits, soak electrodes for 1 to 5
minutes in a 5% hydrochloric acid solution.
3. Temperature effect on life expectancy: If glass
electrode life expectancy is 100% at 25°C (77°F), then
it will be approximately 25% at 80°C (176°F), and
approximately 10% at 100°C (212°F).
CAUTION
Hydrochloric acid is toxic and highly corrosive. Avoid skin
contact, wear protective gloves. Use only in a well ventilated area. Do not inhale fumes. In case of an accident,
consult a doctor immediately.
ORP Calibration
1. After making an electrical connection between
the sensor and the instrument, obtain a standard
solution of saturated quinhydrone PN R508-8OZ
(475mV). This can also be made quite simply by
adding a few crystals of quinhydrone to either pH 4
or pH 7 buffer. Quinhydrone is only slightly soluble,
therefore only a few crystals will be required.
2. Immerse the sensor in the standard solution. Allow
1-2 minutes for the ORP sensor to stabilize.
3. Standardize the instrument to the solution value
shown in the table, right. The resulting potentials,
measured with a clean platinum electrode and
saturated KCl/AgCl reference electrode, should be
within +/- 20 millivolts of the value shown in the
table below. Solution temperature must be noted to
ensure accurate interpretation of results. The ORP
value of saturated quinhydrone solution is not stable
over long periods of time. Therefore, these standards
should be made up fresh each time they are used.
4. Remove the sensor from the buffer, rinse, and install
in the process.
Maintenance for ORP Electrode
Electrodes should respond rapidly. Sluggishness, offsets,
and erratic readings are indicators that the electrodes
may need cleaning or replacement.
1. To remove oil deposit, clean the electrode with a mild
non-abrasive detergent.
2. To remove scale deposits, soak electrodes for 1 to 5
minutes in a 5% hydrochloric acid solution.
3. ORP (metallic) electrodes should be polished with
moistened baking soda.
Figure 3. Sensor Dimensions
WRENCH FLATS
1.30 IN ACROSS
1 IN MNPT
3/4 IN MNPT
1 IN MNPT
TEMP COMP
SOLN GND
REFERENCE
JUNCTION
pH ELECTRODE
.92
2.33
6.91
8.63
3
General Purpose pH/ORP Sensor
Instruction Sheet
October 2014
LIQ_MAN_ABR_3900
Figure 3. Sensor Dimensions
WRENCH FLATS
1.30 IN ACROSS
1 IN MNPT
3/4 IN MNPT
1 IN MNPT
TEMP COMP
SOLN GND
REFERENCE
JUNCTION
pH ELECTRODE
.92
2.33
6.91
8.63
Figure 4. Typical Flow Through insertion installation using PN 2002011 Pipe Tee (sensor must be installed at
least 10° above the horizon)
Horizontal Pipe Tee (PN 2002011)
Pressure/Temperature Ratings
psig (kPa [abs])
150 (1136)
128 (984)
102 (805)
80 (653)
57 (494)
48 (432)
Figure 5. Low Flow Cell PN 24091-00
°F (°C)
150 (65)
160 (71)
170 (77)
180 (82)
200 (93)
210 (99)
INCH
MILLIMETER
Inlet and outlet connections are stainless steel and
take 1/4-inch OD tubing. Flow cell is polycarbonate
with 1/4-inch FNPT fittings.
Wetted materials:
Body & Nut – Polyester/Polycarbonate
Fittings – 316 SST
Seals – Silicone
Flow cell ratings:
Temperature: 32˚-158˚F (0-70˚C)
Max. Pressure: 90 PSIG (721 kPa [abs])
Flow rate: 2-5 GPH (7.6-18.9 LPH)
4
Instruction Sheet
General Purpose pH/ORP Sensor Sensors
LIQ_MAN_ABR_3900
October 2014
Figure 6. Jet Spray Cleaner PN 12707-00 (sensor must be installed at least 10° above the horizon)
The Jet Spray Cleaner eliminates routine,
manual sensor maintenance by cleaning the
sensor with water or compressed air. Flow
through the cleaner can be controlled by a
solenoid valve.
NOTE: The Jet Spray Cleaner can be used with
Handrail Mounting Assembly (PN 11275-01,
not shown) or can be mounted through
conduit as shown below.
Jet Spray Cleaner shown with
3900VP pH sensor
Figure 7. Low Flow Panel PN SQP10077-LQD
Low Flow Panel Specifications
Inlet flow 3-80 gph (11.4-304 L/hr)
Inlet pressure
3 – 65 psig (122 – 549 kPa abs)*
Temperature 32 - 122°F (0 - 50°C)
*The minimum inlet pressure is required to open a check valve, which prevents the flow cell from draining if sample flow is lost. Removing the check
valve lowers the inlet pressure requirement to a few feet of water head.
5
General Purpose pH/ORP Sensor
October 2014
Instruction Sheet
LIQ_MAN_ABR_3900
NOTE
For additional wiring information on this product, including sensor combinations not shown here, please refer to either our online wiring programs or
the Manual DVD enclosed with each product.
1056, 1057, 56, 5081, 6081, 54e, and XMT: http://www3.emersonprocess.com/raihome/sp/liquid/wiring/XMT/
1066 and sensors with SMART preamps: http://www2.emersonprocess.com/en-US/brands/rosemountanalytical/Liquid/Sensors/Pages/ Wiring_Diagram.aspx
1055: http://www3.emersonprocess.com/raihome/sp/liquid/wiring/1055
Figure 8. 3900-01 and 3900VP-01 to 54epH/ORP
Figure 9. 3900-02 and 3900VP-02 to 54epH/ORP
6
Instruction Sheet
LIQ_MAN_ABR_3900
General Purpose pH/ORP Sensor Sensors
October 2014
Figure 10. Sensor Wiring 3900VP-01 gray cable to 54epH/ORP
Figure 11. Sensor Wiring 3900VP-02 gray cable to 54epH/ORP
7
General Purpose pH/ORP Sensor
October 2014
Figure 12. 3900-01 and 3900VP-01 to Xmt
Figure 13. 3900-02 and 3900VP-02 to Xmt
8
Instruction Sheet
LIQ_MAN_ABR_3900
Instruction Sheet
LIQ_MAN_ABR_3900
General Purpose pH/ORP Sensor Sensors
October 2014
Figure 14. Sensor Wiring 3900VP-01 with gray cable to XMT
Figure 15. Sensor Wiring 3900VP-02 with gray cable to Xmt
9
General Purpose pH/ORP Sensor
October 2014
Figure 16. 3900-01 and 3900VP-01 to 1055
Figure 17. Two-Input 3900-01 and 3900VP-01 to 1055
10
Instruction Sheet
LIQ_MAN_ABR_3900
Instruction Sheet
LIQ_MAN_ABR_3900
General Purpose pH/ORP Sensor Sensors
October 2014
Figure 18. 3900-02 and 3900VP-02 to 1055
Figure 19. Two-Input 3900-02 and 3900VP-02 to 1055
11
General Purpose pH/ORP Sensor
October 2014
Instruction Sheet
LIQ_MAN_ABR_3900
Figure 20. Wiring with Remote Junction Box and Preamp (PN 23555-00) to 3900-02 and 3900VP-02
Figure 21. 1055pH/pH Wiring through Remote Junction Boxes to 3900-02 and 3900VP-02
12
Orange
Clear
Blue
Gray
White/Gray
Red
White/Red
White
Green
ID (inner drain)
(No Connection
TB 2
+5VDC / +V SNSR
-5VDC /-V SNSR
pH/pH in
pH SHLD / SHLD / GUARD
GND/SOL GND
REF / REF IN
Ref SHLD / SHLD /GUARD
RTD IN
RTD SENSE /SNS
RTD RTN /RTN
sensor or VP8 cable instead of using
shown wiring scheme.
Rosemount Analytical
intruments:
Extension Cable PN 9200348 can also 56 / 1056 / 1057 /
be used; extend color scheme from
1066 / 6081
Extension Cable PN 23646-01 or
9200273 shown
Green (+5 VDC)
Brown (-5VDC)
Black ( mV/pH in)
White/Black ( mV/pH Shield)
Blue (Solution Ground)
Gray (Reference in)
White/Gray (Reference Shield)
Red (RTD in)
White/Red (RTD Sense)
White (RTD Return)
ID (inner drain)
Remote Junction Box PN 23555-00 or Sensor Head Junction Box PN 23709-00
(Both J-boxes include Preamplifier Board PN 23557-00)
No Connection
BNC
11
11
TB 1
12
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
Connect to instrument
ground or as shown
3900 Sensors, Preamplifier in Junction Box
• For 3900-02 and 3900VP-02 sensors
• Non-preamp sensors
• Blue Cable
10
9
8
7
6
5
4
3
2
1
54epH/ORP XMT
5081
12
11
10
9
8
7
6
5
4
3
2
1
Instruction Sheet
LIQ_MAN_ABR_3900
General Purpose pH/ORP Sensor Sensors
October 2014
Figure 22. 3900 Sensors, Preamplifier in Junction Box
13
14
Orange
Clear
Blue
Gray
White/Gray
Red
White/Red
White
Green
ID (inner drain) (+5V)
White/Gray (-5V)
Orange ( mV/pH in)
Clear ( mV/pH Shield)
Blue (Solution Ground)
Gray (Reference in)
Red (RTD in)
White/Red (RTD Sense)
White (RTD Return)
Green
+5VDC / +V SNSR
-5VDC /-V SNSR
pH/pH in
pH SHLD / SHLD / GUARD
GND/SOL GND
REF / REF IN
Ref SHLD / SHLD /GUARD
RTD IN
RTD SENSE /SNS
RTD RTN /RTN
Rosemount Analytical
intruments: 56 / 1056 / 1057 /
1066 / 6081
Connect to instrument
ground or as shown
• For 3900-01 and 3900VP-01 sensors
• Preamplifier in sensor
• Blue Cable
3900 Sensors, Preamplifier in Sensor
10
XMT
54epH/ORP
5081
9
8
7
6
5
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
-01
October 2014
-70, 3400HTVP-70,
General Purpose pH/ORP Sensor
Instruction Sheet
LIQ_MAN_ABR_3900
Figure 23. 3900 Sensors, Preamplifier in Sensor
7
7
7
7
TB 1
12
11
10
10
9
9
TB 2
12
11
11
10
10
9
9
8
8
6
6
6
6
8
8
5
5
4
4
3
3
2
2
5
5
4
4
3
3
2
2
1
Remote Junction Box PN 23550-00 (with
Extension board for point-to-point wiring)
ID (inner drain)
White/Gray
Orange
Clear (Orange shield)
Blue
Gray
Red
White/Red
White
Green
1
+5VDC / +V SNSR
-5VDC /-V SNSR
pH/pH in
pH SHLD / SHLD / GUARD
GND/SOL GND
REF / REF IN
Ref SHLD / SHLD /GUARD
RTD IN
12
11
10
9
8
7
6
5
4
3
2
1
can also be used; White/gray
is replacement wire color for Brown wire.
54epH/ORP
Rosemount Analytical
5081
intruments: 56 / 1056 / 1057 /
Extension Cable PN 9200348
1066 / 6081
Extension Cable PN 23646-01
or 9200273 shown.
Green (+5 VDC)
Brown (-5VDC)
Black ( mV/pH in)
White/Black (mV/pH Sheild)
Blue (Solution Ground)
Gray (Reference in)
White/Gray (No connection)
Red (RTD in)
White/Red (RTD Sense)
RTD RTN /RTN
RTD SENSE /SNS
Connect to instrument
ground or as shown
White (RTD Return)
Inner Drain
• For 3900-01 and 3900VP-02 sensors
• Preamplifier in sensor
• Blue Cable
3900 Sensors, Preamplifier in Sensor,
Junction Box used for extending cable
XMT
10
9
8
7
6
5
4
3
2
1
Instruction Sheet
LIQ_MAN_ABR_3900
General Purpose pH/ORP Sensor Sensors
October 2014
Figure 23. 3900 Sensors, Preamplifier in Sensor
15
General Purpose pH/ORP Sensor
October 2014
Figure 22. 3900-01 and 3900VP-01 to Models 5081, 4081 or 3081
Figure 23. 3900-02 and 3900VP-02 to Models 5081, 4081 or 3081
16
Instruction Sheet
LIQ_MAN_ABR_3900
Instruction Sheet
General Purpose pH/ORP Sensor Sensors
LIQ_MAN_ABR_3900
October 2014
Figure 10. Wiring for 3900-01 and 3900VP-01 to 56, 1056 & 1057 pH
Figure 11. Wiring for 3900-02 and 3900VP-02 to 56, 1056 & 1057 pH
17
General Purpose pH/ORP Sensor
October 2014
Figure 26. Sensor Wiring 3900VP-01 with gray cable to 1056/56
Figure 27. Sensor Wiring 3900VP-02 with gray cable to 1056/56
18
Instruction Sheet
LIQ_MAN_ABR_3900
Instruction Sheet
LIQ_MAN_ABR_3900
General Purpose pH/ORP Sensor Sensors
October 2014
Figure 28. Sensor Wiring 3900VP-01 with gray cable to 1057
Figure 29. Sensor Wiring 3900VP-01 with gray cable to 1057
19
General Purpose pH/ORP Sensor
October 2014
Instruction Sheet
LIQ_MAN_ABR_3900
Figure 30. pH/ORP Sensor Wiring – 1066/3900VP-01 (blue cable – refer to manual for recommended cable order)
Figure 31. pH/ORP Sensor Wiring – 1066/3900VP-02 (gray cable – refer to manual for recommended cable order)
20
Instruction Sheet
General Purpose pH/ORP Sensor Sensors
LIQ_MAN_ABR_3900
October 2014
Figure 32. pH/ORP Sensor Wiring – 1066/3900VP-01 (refer to manual for recommended cable order)
Figure 33. pH/ORP Sensor Wiring – 1066/3900VP-01 (blue cable – refer to manual for recommended cable order)
21
General Purpose pH/ORP Sensor
October 2014
Instruction Sheet
LIQ_MAN_ABR_3900
Figure 34. pH/ORP Sensor Wiring – 1066/3900VP-02 (refer to manual for recommended cable order)
Figure 35. pH/ORP Sensor Wiring – 1066/3900VP-02 (blue cable – refer to manual for recommended cable order)
22
Instruction Sheet
LIQ_MAN_ABR_3900
General Purpose pH/ORP Sensor Sensors
October 2014
Figure 36. Sensor Wiring 3900VP-01 with gray cable to 5081
Figure 37. Sensor Wiring 3900VP-01 with gray cable to 5081
23
General Purpose pH/ORP Sensor
October 2014
Figure 38. 3900-01 and 3900VP-01 to 6081-P
Figure 39. 3900-02 and 3900VP-02 to 6081-P
24
Instruction Sheet
LIQ_MAN_ABR_3900
Instruction Sheet
LIQ_MAN_ABR_3900
General Purpose pH/ORP Sensor Sensors
October 2014
Figure 40. Sensor Wiring 3900VP-01 with gray cable to 6081
Figure 41. Sensor Wiring 3900VP-02 with gray cable to 5081
25
General Purpose pH/ORP Sensor
Instruction Sheet
October 2014
LIQ_MAN_ABR_3900
Ordering Information
The 3900/3900VP pH/ORP Sensor is housed in a PSS
plastic body with built-in solution ground for advanced
diagnostics. A Pt-100 RTD is offered for temperature
compensator. The sensor is available with an integral cable
or VP8 connector. Junction box kits with preamplifiers
can be ordered separately if an analyzer/ transmitter with
an integral preamplifier is not located within 15 ft. of the
sensor. SMART preamplifier (-01) is the standard preamplifier option, and is compatible with models XMT, 3081,
5081, 6081, 54e, 1055 and 1056 analyzers/transmitters.
3900 pH/ORP Sensor - New Generation general purpose sensor
Code
01
02
Code
10
12
Preamplifier Option
Preamplifier
No preamplifier
Measuring Electrode
General Purpose Low resistivity GPLR pH Glass (0 - 14pH)
Platinum ORP
EXAMPLE 3900 - 01 - 12
3900VP pH/ORP Sensor - New Generation general purpose sensor with VP
Code
01
02
Code
10
12
Preamplifier Option
Preamplifier
No preamplifier
Measuring Electrode
General Purpose Low resistivity GPLR pH Glass (0 - 14pH)
Platinum ORP
EXAMPLE 3900VP - 02 - 10
26
Instruction Sheet
General Purpose pH/ORP Sensor Sensors
LIQ_MAN_ABR_3900
October 2014
Accessories
Part Number
Description
24281-00
15 ft. cable with mating VP8 connector
24281-01
25 ft. cable with mating VP8 connector
24281-02
2.5 ft. cable with mating VP8 connector
24281-03
50 ft. cable with mating VP8 connector
24281-04
100 ft. cable with mating VP8 connector
24281-05
4 ft. cable with mating VP8 connector
24281-06
10 ft. cable with mating VP8 connector
24281-07
20 ft. cable with mating VP8 connector
24281-08
30 ft. cable with mating VP8 connector
12707-00
Jet cleaner
23242-02
Insertion adapter
24091-00
Low flow cell
23555-00
Junction Box with Preamplifier for Models 54e, 3081, 4081, 5081, XMT, 1055, 1056
2002011
CPVC flow through Tee, 1-1/2 in. NPT process connection
11275-01
Sensor handrail assembly
9210012
Buffer solution, 4.01 pH, 16oz
9210013
Buffer solution, 6.86 pH, 16oz
9210014
Buffer solution, 9.18 pH, 16oz
9200273
Extension cable, gray
9200348
Extension cable, blue
SQP10077-LQD
Low Flow Control Panel
27
LIQ_MAN_ABR_3900
Rev. E
October 2014
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