Signet 2839 to 2842 Conductivity Sensors
*3-2840.090*
English
3-2840.090 Rev H 04/12 English
SAFETY INSTRUCTIONS
1. Depressurize and vent system prior to installation or removal.
2. Confirm chemical compatibility before use.
3. Do not exceed maximum temperature/pressure specifications.
4. Wear safety goggles or faceshield during installation/service.
5. Do not alter product construction.
6. When using chemicals or solvents care should be taken and
appropriate eye, face, hand, body, and/or respiratory protection should be used.
Table of Contents
1. Specifications
2. Cell constant selection
3.Installation
4.Wiring
5. Maintenance
6. Ordering information
1. Specifications
2839: 0.01 cm-1
2840: 0.1 cm-1
140.7 mm/
5.54 in.
102.7 mm/
4.05 in.
59.3 mm/
2.33 in.
2842: 10.0 cm-1
109 mm/
4.29 in.
15.9 mm/
0.625 in.
35.8 mm/
1.41 in.
15.9 mm/
0.625 in.
73.7 mm/
2.90 in.
2841: 1.0 cm-1
21.5 mm/
0.85 in.
41.9 mm/
1.65 in.
15.9 mm/
0.625 in.
Dimensions
26.8 mm/
1.13 in.
General
Instrument Compatibility:
• 2850, 5800CR, 5900, 8850-X, 8860, 9900
BAR PSI
7 100
Standards and Approvals:
• Manufactured under ISO 9001 and ISO 14001
China RoHS (Go to www.gfsignet.com for details)
5
75
3
50
Shipping Weight:
• 2839: • 2840, 2841, 2842:
2
25
Process connection:
• -1 versions:
• -1D versions: 0.34 kg (0.74 lb)
0.30 kg (0.66 lb)
/4 in. NPT
ISO 7/1-R 3/4
-20 0 20
60
100
140
°F
-4 32 68
140
212
284
3
Cable:
• 4.6 m (15 ft) std., 3 conductor with shield, 22 AWG,
max length 30 m (100 ft). For resistivity measurements above
10 MΩ or below 20 °C, maximum cable length is 7.6 m (25 ft).
Performance:
Accuracy:
Temp. measurement: Temp. response time (τ):
°C
±2% of cell value
PT1000
2839: 5 s
2841: 20 s
2840: 10 s
2842: 30 s
Operating temperature/pressure:
(with thread engagement per ANSI B1.20.1)
-1X versions:
• -10 to 100 ºC @ 6.9 bar (14 to 212 ºF @ 100 psi)
• -10 to 131 ºC @ 2.76 bar (14 to 268 ºF @ 40 psi)
Storage temperature:
-20 to 131 ºC (-4 to 268 ºF)
Wetted materials:
Threaded fitting:
Insulator:
Insulator O-ring (2841, 2842):
Electrode contacts:
PEEK
PEEK
FPM
316L stainless steel
2. Cell Constant Selection
•
•
•
•
2839 (0.01 cm-1): 0.010 to 100 µS (10 kΩ to 100 MΩ)
2840 (0.1 cm-1): 1 to 1000 µS (1 MΩ to 1 kΩ)
2841 (1.0 cm-1): 10 to 10,000 µS
2842 (10.0 cm-1): 100 to 200,000 µS
Custom cell certificate
The sensor was delivered from the factory with a calibration
certificate. The information provided on the certificate (custom
cell constant and temperature offset) should be entered in the
transmitter/controller. See individual product manual for details.
Signet Conductivity/Resistivity Electrode Ranges
Electrode Models
The nominal process value should be near the center of the range.
Ranges below are for use with Signet Conductivity Instruments:
2842 10.0 cm-1
2841 1.0 cm-1
2840 0.1 cm-1
2839 0.01 cm-1
0.010µs 1µs 10µs 100µs
(100 MΩ)
(10 kΩ)
1000µs 10,000µs
200,000µs
Conductivity Range (µS)
3.Installation
• Inspect threads to ensure integrity. Do not install an electrode with damaged threads.
• Apply sealant or PTFE tape to threads.
• Wetted materials include 316L stainless steel, PEEK and FPM (FPM O-ring inside 2841, 2842). Check for chemical compatibility
before installing electrode.
• Electrodes are supplied with 4.6 m (15 ft) of cable. It may be extended to a maximum 30 m (100 ft).
• For resistivity measurements above 10 MΩ or below 20 °C, maximum cable length is 7.6 m (25 ft).
• When using the 5800CR, 5900, 8850 and 8860 transmitters, maximum cable length is 4.6 m (15 ft).
• When using 9900, maximum cable length is 30.5 m (100 ft).
3.1 In-Line Installation
If the electrode is mounted vertically in
a tee, do not recess the openings inside
the tee. Mounting upside down may help
prevent air entrapment.
An oversized tee may also be helpful for
inline installations.
At least 4 threads (ANSI B1.20.1) must
be engaged to provide pressure capacity
per published specifications.
The preferred installation for in-line applications
directs flow straight into the electrode. This
configuration dislodges entrapped air bubbles,
and provides the best continuous sampling of the
fluid content.
3.2 Submersible installation
1. Feed cable into watertight conduit.
2. Apply thread sealant to the electrode before threading
conduit onto electrode. Avoid twisting the cable.
3. Secure cable with conduit or cable gland.
4. For additional defense against possible accumulation of
condensation at the back seal area of the electrode, fill the
lower 75-100 mm (3-4 in.) of conduit or extension pipe with a
flexible sealant such as silicone.
In aerated vessels install the electrode
in a stillwell to prevent air from being
trapped inside the electrode.
/4 in. NPT or
ISO 7/1-R 3/4
3
Appliquer
Llene
con
Füllen
Sieun
Fill
with
élastomère
3
a
to4
in. 10 cm
mit
74pulg.
bis
of
sealant
par
7-10 cm
de
sellante
Dichtungsmittel
2
Fill with
3 to 4 in.
of sealant
2839-2842 Conductivity Sensors
4.Wiring
•
•
•
•
Do not route electrode cable in conduit containing AC power wiring. Electrical noise may interfere with electrode signal.
Routing electrode cable in grounded metal conduit will help prevent electrical noise and mechanical damage.
9900
Seal cable entry points to prevent moisture damage.
with 8052 Integral Mounting Kit
For resistivity measurements above 10 MΩ or below 20 °C, maximum cable length is 7.6 m (25 ft).
and 9900.396 Angle Adjustment Adapter
Integral installation detail
•
•
•
•
•
3-8052 Integral Kit and 3-9000.392-X Liquid Tight Connector kit are required. (See Parts and Accessories on back page).
Cut the cable to approx. 15 cm (6 in.).
8850
Conductivity Transmitter
Strip outer cable cover back 5 cm (2 in.).
Strip each conductor to expose 1 cm (3/8 in.) of bare wire.
locking ring
Tin each conductor with solder for best results.
conduit base
Max cable length
15.2 cm (6 in.)
8052
integral
adapter
9900
with 8052 Integral Mounting Kit
and 9900.396 Angle Adjustment Adapter
electrode
8850
Conductivity Transmitter
Sensr Gnd
BLACK
To 5800CR To 5800CR
14
To 8850-2
and 8850-3
Sensr Gnd
(SHIELD)
To 8850-2
and 8850-3
Iso. Gnd
11
Signal IN Temp. IN
(RED)
14
13
Signal IN
(RED)
TEMP 1
BLACK
SHIELD
WHITE (Gnd)
WHITE
SHLD
ISO GND
ISO GND
WHITE
SHLD1
TEMP
RED
ISO GND
SGNL 1
RED
TEMP 1
TEMP 1
(shown with
8052 Integral Mounting Kit
and 9900.396 Angle Adjustment Adapter)
SGNL 1
SHIELD (Gnd)
BLACK
WHITE
RED
2839-2842 Conductivity Sensors
Temp. IN
(WHITE)
SW1
Signal RTN
(BLK)
D3
Signal IN
(RED)
via 2850 Sensor Electronics
SGNL 1
SHLD
ISO GND
TEMP 1
Ch 2
BLACK
RED
SHLD1
SGNL
Sensr Gnd
(SHIELD)
2 Data
1 V+
9900 S3L
Input Connector
SHLD
GND
DATA
V+
SHIELD (Gnd)
SHIELD
(Gnd)
RED
To 8860
3 Gnd
3
ISO GND
SGNL 1
WHITE
Red
Black
2
BLACK
RED
SHLD1
TEMP
Ch 1
SHIELD
WHITE (Gnd)
BLACK
White
4
To 8860
CTS
SHLD
ISO GND
ON
BLACK
To 8860
1
SHIELD (Gnd)
9900 S3L Input
SHLD
11
SmartPro
V+
(WHITE)
GND
DATA
12
Shld
To 5800CR
To 8850-2 and 8850-3
Temp. IN
Iso. Gnd
WHITE
RED
WHITE
RED
7
(BLACK)
Sensr
Gnd
(SHIELD)
Temp. IN Sensr Gnd
(WHITE)
Iso. Gnd (SHIELD)
(BLACK)
Signal IN
(RED) IN Iso. Gnd
Temp.
(WHITE) (BLACK)
BLACK
BLACK
8
13
14
12
13
11
12
SILVER (SHLD)
WHITE
SILVER (SHLD)
RED
Signal IN
9
Shld Shld
7
Signal IN Signal IN
(RED) (RED)
SILVER (SHLD)
Temp. INTemp. IN
Iso. Gnd
Iso. Gnd
Iso. Gnd (SHIELD)
(BLACK)
Sensr
Gnd
(SHIELD)
Temp. IN Iso. Gnd
(WHITE)
Iso.
Gnd (BLACK)
(BLACK)
Signal IN Temp. IN
(RED) IN
Temp.
(WHITE) (WHITE)
Signal Signal
IN
IN
10
9
10
8
9
7
8
Ch 1
de
Sensr Gnd
To 10
8850-1
(SHIELD)
Ch 1
l
r
ProPoint
Ch 2
base
To 8850-1
ProcessPro
To 8850-1
Ch 2
ring
Black
Red
White
Shield
SGNL 1
3
0.34 in.
5. Maintenance
14 mm
11 mm
Conductivity electrodes require little maintenance except for periodic cleaning
in installations where contaminants
0.55 in.are present.
0.44 in.
• Keep metal surfaces clean and free of coatings.
25.4 mm/1.0 in.
5.1 Replacement Insulator, 2842 electrode only
• 2842 electrodes have a removable insulator so the internal
cavity can be cleaned.
• After the insulator snaps into position it cannot be removed
without damage.
• Order insulator replacement kit 3-2842.390 before attempting
maintenance.
8-32 thread for removal
41 mm/1.6 in.
Insulator removal
and Insulator
replacement
3-2842.390
replacement kit
A. Thread the screw into the insulator (8-32 thread).
B. Pull to remove the old insulator.
C. Clean any coating or deposits inside the electrode.
D. Insert the new insulator and press into place.
Electrode tip
(side view)
Electrode tip
(end view)
9 mm
0.34 in.
Electrode
Insulator
B
A
14 mm
0.55 in.
11 mm
0.44 in.
Cotton swab
C
25.4 mm/1.0 in.
8-32 thread for removal
41 mm/1.6 in.
¥ Clean internal and external surfaces
Internal contact
3-2842.390 Insulator replacement kit
New Insulator
D
electrode tip
(side view)
Electrode tip
(end view)
Electrode tip
(side view)
6. Ordering Information
Mfr. Part No.
Code
Description
3-2839-1
159 000 921 Insulator
Cell 0.01, 4.6 m (15 ft) cable, NPT
Electrode
3-2839-1D
159 000
Cell 0.01, 4.6 m (15 ft) cable, ISO
B 923
A
3-2840-1
159 000 786
Cell 0.1, 4.6 m (15 ft) cable, NPT
Cotton swab
3-2840-1D
159 000 788
Cell 0.1, 4.6 m (15 ft) cable, ISO
3-2841-1
159 000 790
Cell 1.0, 4.6 m (15 ft) cable, NPT
C
¥ Clean
and1.0,
external
surfaces
3-2841-1D
159 000
792internal
Cell
4.6 m
(15 ft) cable, ISO
Internal contact
3-2842-1
159 000 794
Cell 10.0, 4.6 m (15 ft) cable, NPT
3-2842-1D
159
000 796
Cell 10.0, 4.6 m (15 ft) cable, ISO
New Insulator
3-2850-51
159 001 398
Sensor Electronics, 3/4 in. NPT j-box, one input/one Digital (S3L) output
3-2850-52
159
001
399
Sensor Electronics, 3/4 in. NPT j-box, one input/one 4 to 20 mA output
D
3-2850-61
159 001 400
Sensor Electronics, Universal Mount j-box, one input/one Digital (S3L) output
3-2850-62
159 001 401
Sensor Electronics, Universal Mount j-box, one input/one 4 to 20 mA output
electrode tip
3-2850-63
159 001 402
Sensor Electronics, Universal Mount j-box, two inputs/two Digital (S3L) outputs
(side view)
Parts and Accessories
3-2830 3-2842.390
3-8050-1
3-8052
3-9000.392-1
3-9000.392-2
3-9900.396
5523-0322
159 000 628
159 000 925
159 000 753
159 000 188
159 000 839
159 000 841
159 001 701
159 000 761
Conductivity certification tool; simulates 1µS/cm and 2.5 µS/cm
2842 replacement insulator, PEEK with FPM O-ring
Universal mount junction box
3
/4 in. Integral mounting kit
Liquid-tight connector kit, one set, 1/2 in. NPT
Liquid-tight connector kit, one set, PG 13.5
Angle Adjustment Adapter
Sensor cable (per ft), 3 conductor plus shield
Georg Fischer Signet LLC, 3401 Aerojet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057
For Worldwide Sales and Service, visit our website: www.gfsignet.com • Or call (in the U.S.): (800) 854-4090
For the most up-to-date information, please refer to our website at www.gfsignet.com
3-2840.090 Rev. H 04/12 English
© Georg Fischer Signet LLC 2012