Signet 5900 Salinity Monitor
Member of the ProPointTM Family of Monitors
Description
The Signet 5900 Salinity Monitor utilizes conductivity sensors to provide
direct reading, including calibration,
of salinity in parts per thousand (PPT).
Equipped with a scaleable 4 to 20 mA
output and two programmable relays,
the monitor requires 12 to 24 Volts, AC
or DC, and is compatible with Signet
-1
10 cm
or 20 cm-1 conductivity cells.
Temperature is selectable for display
in either °C or °F, and compensation
is automatic. Calibration is simplified
System Overview
In-Line Sensor Installation
Panel Mount
Signet
5900 Instrument
Submersible Sensor Installation
Panel Mount
Signet
5900 Instrument
with single-point salinity and temperature entry via the wet-cal menu
sequence. The four-button keypad
arrangement with intuitive software
design is user-friendly, and is offered
with a hard-coated, high impact,
and UV resistant polycarbonate front
face. The front panel is rated NEMA
4X/IP65 and an optional splashproof
cover is available to protect the back
of the instrument.
Features
• Direct reading and
calibration in PPT
• Dual proportional control capability
• Scaleable 4 to 20 mA
output (active) internally powered
• Two programmable
relays
• Tamper-proof security
code
• Analog and digital
display
• Non-volatile memory
• Compatible with ALL
Signet conductivity
electrodes
• Versatile low voltage
power requirement
• NEMA 4X/IP65
Application
• Desalination
• Saltwater Production
• Aquatic Animal Life
Support Systems
• Aquaculture
• Environmental Studies
Signet Conductivity Electrode
(sold separately)
Fittings - Customer supplied
124
Pipe extension
or conduit
with 3/4 in.
NPT or
ISO 7/1-R
3/4 threads
Signet Conductivity Electrode
(sold separately)
Note: Submersible installation not applicable
for Sanitary Conductivity Electrode.
C
US
E171559
www.gfsignet.com
Dimensions
96 mm (3.8 in.)
4
Relay 1
0
Signet Monitor
Panel Gasket
Mounting
Panel
91 mm
(3.6 in.)
96 mm (3.8 in.)
88 mm (3.5 in.)
Model 5900
Ordering Notes:
1) Panel cutout should be
92 x 92 mm (3.62 x 3.62
in.)
2) Reversible dials are
included and are scaled
from 0 to 2, 0 to 4, 0 to 6,
0 to 8, 0 to 10, 0 to 100.
3) An optional splash
proof rear cover can
be ordered separately
if needed for outdoor
environments.
4) Use RC filter kits to protect relays from voltage
spikes.
Please refer to
Wiring, Installation
and Accessories
sections for more
information.
6
2
ppt
62.50 PPT
+25.0 C
Front View
Mounting
Clamp
76 mm (3 in.)
Side View
Relay 2
8
10
ENTER
Optional
Splashproof
Rear Cover
Specifications
General
Operating Range:
• Salinity: 1 to 80 ppt (parts per thousand)
• Temp.: -5°C to 100°C (23°F to 212°F)
Display:
96 mm
(3.8 in.)
• Analog: Reversible dials: 0 to 2, 4, 6, 8,
10 and 100
• Digital: Backlit LCD, 2x16 alphanumeric
characters
Electrical
Power Requirements:
12 to 24 Volts, AC or DC, unregulated,
50 to 60 Hz, 10W max.
Current Output:
• 4 to 20mA, non-isolated, active, inter-
88 mm
(3.5 in.)
nally powered
• Loop impedance:
350Ωmax. @ 12V
950Ω max. @ 24V
• Accuracy: ± 0.1%
Alarm Contacts:
• Two SPDT relays:
5A @ 30VDC
5A @ 125VAC
3A @ 250VAC max.
• High/Low/Pulse programmable with
adjustable hysteresis
• Dual proportional control capability, up
to 300 pulses per minute
• Accuracy: ± 2% of reading
Materials
• Enclosure: ABS Plastic
• Keypad: Silicone Rubber
• Panel and case gasket: Neoprene
• Window: Hard-coated polycarbonate
Shipping Weight: 0.8 kg (1.76 lb.)
Environmental
Enclosure rating: NEMA 4X/IP65 front
Operating temperature:
-10°C to 55°C (14°F to 131°F)
Relative humidity:
0 to 95%, non-condensing
Standards and Approvals
• CE, UL
• Immunity: EN50082-2
• Emissions: EN55011
• Safety: EN61010-1
• Manufactured under ISO 9001:2000
for Quality and ISO 14001:2004 for
Environmental Management
Ordering Information
Mfr. Part No. Code Description
3-5900 198 825 008 Salinity Monitor with 4 to 20mA output and two relays
Accessories and Replacement Parts
Mfr. Part No. Code Description
Mounting
3-5000.395 198 840 227 Splashproof rear cover kit
3-5000.598 198 840 225 Surface mount bracket
3-5000.399 198 840 224 5x5 inch adapter plate for Signet retrofit
3-8050.392 159 000 640 Model 200 retrofit adapter
3-0000.596 159 000 641 Heavy duty bracket for wall mounting
Liquid Tight Connectors
3-9000.392 159 000 368 Liquid tight connector kit for rear cover (3 connectors)
3-9000.392-1 159 000 839 Liquid tight connector kit, NPT (1 piece)
3-9000.392-2 159 000 841 Liquid tight connector kit, PG13.5 (1 piece)
Miscellaneous
3-5000.390 159 000 323 Installation kit
3-5000.397 159 000 326 5000 series window kit (window, keypad, and screws)
3-5000.525-1 198 840 226 Bezel, 5000 series
3-5500.390 159 000 347 Dial kit
3-5500.612 198 840 230 Unit tags
3-5000.398 159 000 646 Protective Overlay kit (10 pcs)
3-8050.396 159 000 617 RC Filter kit (for relay use), 2 per kit
Choosing
Products
Instrument
Multi-Pa-
rameter
Flow
pH/ORP
Conductivity/
Resistivity
Pressure, Level
Temperature,
Products
Other
Installation
Wiring &
Reference
Technical
Temperature/
Pressure
Graphs
of Terms
Glossary
Reference
Part No.
Index
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125
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