Georg Fischer 5900 Operating Manual

Signet 5900 Salinity Monitor

*3-5900.090-1*

3-5900.090-1 Rev. E 3/06 English

Contents

1. Power Connections

2. Compatible Sensor Wiring

3. 4 - 20 mA Current Output Connections

4. Relay Connections

5. Relay Operation

6. Menu Functions

Remove terminal blocks for easy wiring

English

CAUTION!

• Refer to instruction manual for more details.

• Remove power to unit before wiring input and output
connections.

• Follow instructions carefully to avoid personal injury.

7. Temperature Coeffi cient

8. Parts and Accessories

9. Specifi cations

10. Quick Reference Menu Parameters

11. Troubleshooting

12. Maintenance

1.

Freq. IN

Freq. IN

Sen. Pwr.

Std. Sensor

Open Collector
Sensor

LISTED

U

L

77CJ

12-24 V

1. Power Connections

CAUTION!
Never connect 110 VAC or 220 VAC to rear power

terminals. High voltage AC will damage instrument and
void warranty.

12-24 V

10 W

+

Gnd

+

Gnd

AUX

PLS

Iso. Gnd

output

output

10 W

+

-

5900 Terminals

2.

2

1

Tota l
reset

Flow

Patent No. D376,328

3.

Std. Sensor

U

L

Freq. IN

LISTED
77CJ

Freq. IN

Sen. Pwr.

Open Collector
Sensor

12-24 V

10 W

+

+

Iso. Gnd

output

-

PLS

reset

output

Flow

Patent No. D376,328

2

1

Gnd

+

Gnd

Tota l

AUX

2. Compatible Sensor Wiring

20.0

10.0

Silver (Shld)

Black

White

Red

= Double Insulated

-+

= DC or AC power

External power supply

-

12 - 24 VDC

OR

12 - 24 VAC

+

Technical Notes:

• To reduce the possibility of noise interference, isolate AC
power lines from signal lines.

• Maximum 4-20 mA loop impedance is affected by the supply
voltage.

3. 4-20 mA Current Output Connections

Fuse**

1/8A

4 - 20 mA*

+

*

-

+

-

5900 Terminals

4-20

mA

5900
Terminals

Signet Sensor
3-2822-1 (10.0) 0 - 80
3-2823-1 (20.0) PPT

Range (PPT):

Signal IN

Temp. IN

Shld

Iso. Gnd

Technical Notes:

• Use three conductor shielded cable for cable extensions up to
30 m (100 ft) max.

• Cable shield MUST be maintained through cable splice.

Technical Notes:

** 1/8A fuse recommended (customer supplied)
* 4-20 mA output is internally powered (non-isolated),

maximum loop impedance 350 Ω with a 12 V instrument
supply voltage, 950 Ω with a 24 V instrument supply voltage.

To isolate output and prevent ground loop problems:

1. Use monitor device with isolated inputs, or

2. Use separate DC supply for 5900 and monitor device, or

3. Power 5900 with 12 - 24 VAC step down transformer

A

4. Relay Connections

Two internal relay contact sets (COM, NO, and NC) may be used
for external device control. Front panel LED annunciators indicate
the activation status of each relay. Each relay can control up to
two devices simultaneously. Relay operation modes include Low
alarm, High alarm, and Proportional Pulse.

Common device connections include:

• Pulse mode - metering pump control

• Pulse mode - solenoid valve control

Relay
Inactive

• Low or High mode - warning lamps

• Low or High mode - bells or sirens

• Low or High mode - external heavy-duty relay

NO C NC

Wiring Example (right)

Device A is powered when relay 2 is inactive (front panel LED
"off"). Power is discontinued when the relay 2 setpoint is reached
(front panel LED "on"). Device B is not powered when relay 2 is
inactive. Power is applied after the relay 2 setpoint is reached.

5. Relay Operation

Relay
Active

NO

C

NC

+

External AC/DC

NO

Relay 1Relay 2

C

5900 Terminals

NC

-

+

-

Device

A

power

-

NO C NC

+

Device

B

Technical Notes:

• Maximum relay contact ratings: 5 A @ 30 VDC, 5 A @ 125
VAC, or 3 A @ 250 VAC

• An external heavy-duty relay must be used for devices with
surge currents or operating currents that exceed the above
specifi cations.

5.1 LOW alarm mode

The relay is active when the solution salinity in Parts Per Thou­sand (PPT) drops below the setpoint, and is inactive when the
solution salinity rises above the setpoint plus hysteresis.

5.2 HIGH alarm mode

The relay is active when the solution salinity (PPT) rises above
the setpoint, and is inactive when the solution salinity drops below
the setpoint plus hysteresis.

PPT

Low setpoint =

djustable hysteresis =

Adjustable hysteresis =

Relay active =

Relay inactive =

5.3 Proportional PULSE mode

The proportional pulse relay confi guration is primarily designed for metering pump control. The operator is prompted to enter a minimum
and maximum salinity setpoint and maximum pulse rate for the assigned relay. Relay pulse width is fi xed at 130 ms.

• Metering pump chemical addition (dry contact activation type required)

Example 1: As the process salinity (PPT) rises above the mini­mum pulse setpoint (10 PPT) the relay begins pulsing, triggering
the metering pump for deionized water addition. As the process
salinity continues to rise, pulsing accelerates proportionally until
the maximum programmed pulse rate of 300 pulses/minute and
setpoint (30 PPT) is reached, forcing the process salinity back
down to intended levels (e.g. < 10 PPT).

Example 2: As the process salinity (PPT) falls below the minimum
pulse setpoint (30 PPT) the relay begins pulsing, triggering the me­tering pump for chemical addition. As the process salinity continues
to decrease, pulsing accelerates proportionally until the maximum
programmed pulse rate of 300 pulses/minute and setpoint (10 ppt)
is reached, forcing the process salinity back up to intended levels
(e.g. < 30 PPT).

High setpoint =

Relay active =

Relay inactive =

PPT

300 pulses

Relay 1 Rate:

300 pulses

0 pulses

PPT

2 Signet 5900 Salinity Monitor

Relay 1 Rate:

300 Pulses/min >

10

PPT

Relay 1

or Relay 2

Relay 1: Pulse

30.0000>

10.0000

30
PPT

Relay 1
or Relay 2

10

PPT

300 Pulses/min >

Relay 1: Pulse

30.0000

10.0000>

0 pulses

30
PPT

PPT

6. Menu Functions

ENTER

To access either CALIBRATE or OPTIONS menus, press and hold
the ENTER key as illustrated (right):

Press &
hold for
access:

ENTER

Menus:

• VIEW menu: Displayed during standard operation. The

operator can navigate through the menu by pressing UP or
DOWN arrow keys.

• CALIBRATE Menu: Contains all critical display setup
and output parameters. A security code feature prevents
unauthorized tampering. The operator is required to enter an
access code for menu access. The same code also unlocks
OPTIONS menus.

• OPTIONS Menu: Contains setup and display features
accessed for minor display or output adjustments.

• Reversible Dials (right)

The 5900 includes a dial kit with 6 reversible dial faces and

units decals (factory installed dial: 0 - 100). See dial kit for
additional information.

6.1 VIEW Menu

To G

Choose:

Menu Displays A - G:
(Factory default displays shown in menu
column 1)

A.

40.0 PPT
+25.0 C

VIEW

CALIBRATE

2s 5s

OPTIONS

PP

T

PPT

0

10

0

100

Change: Save:

A. Active display of salinity (PPT) and

temperature in degrees celsius (°C) or
fahrenheit (°F).

B. Display of conductivity and

temperature.

C. Loop output display shows the loop

current output level.

D. Range display shows the programmed

min and max meter dial range.

E. Relay 1 display shows the

programmed operation mode and
setpoint for relay 1.

F. Relay 2 display shows the

programmed operation mode and
setpoint for relay 2.

G. Last calibration shows a user defi ned

setup date for maintenance records.
This feature is not an internal timer or
calendar.

B.

C.

D.

E.

22.0 mS/cm

Loop Output:

Min→Max: PPT

0.0000→40.0000

Relay 1: Low

20.0000 PPT

Relay 2: High

F.

40.0000 PPT

G.

+25.0 C

20.00 mA

Last CAL:

01-01-99

Signet 5900 Salinity Monitor

To A

3

6.2 CALIBRATE Menu

Requirements

System calibration (WET CAL) is required for fi rst-time system setup or periodic sensor verifi cation. System calibration can be performed
with a solution of known salinity, or by comparison to a refractometer. Refer to the WET CAL procedure for calibration details.

Press and hold ENTER key for 2 seconds:

CALIBRATE: ----

is displayed.

Enter Key Code

Press keys in sequence to enter menu:

CALIBRATE: XXXX

is displayed.

Enter Key Code

Menu Settings A - J:
(Factory default displays shown in menu
column 1)

A. Selects cell type and cell value:

• Standard cells: 10.0, or 20.0. Use

10.0 or 20.0 settings.

• Custom (certifi ed) cells: 00.0000

-999999.

B. Selects displayed units; should be

selected for conductivity display INFO
ONLY.

C. Sets PPM factor when PPM display

units are selected, 0.01 - 9.99.

D. Sets Min→Max meter dial range

(factory installed dial, 0 - 100).
Contact factory for custom dial
confi gurations. Does not effect 4 to
20 mA output; set seperately.

To J

Cell: Standard

A.

B.

C.

D.

E.

F.

G.

10 >

Units:

PPM Factor:

2.00 >

Min

→

0.0000

WET CAL:

>

Relay 1: Low

20.00 PPT >

Relay 1 Hys:

4.0000 PPT >

Choose:

mS

Max: PPT

→40.000

Cell: Standard
.01 .1 1 10 20

Units:

uS mS PPM k M

PPM Factor:

2.00

Min→Max: PPT

0.0000

>

→40.000

WET CAL:

Press <ENTER>

Relay Low or High Mode Selected

Relay 1: Low

20.00 PPT >

Mode (top row)
Setpoint (bottom row)

Relay 1 Hys:

04.0000 PPT >

Change:

>

Cell: Custom

10.020

Units:

uS mS PPM k M

PPM Factor:

1.95

Min

→

Max: PPT

00000.0

→0080.00

Relay 1: Low

10.0000 PPT >

Relay 1 Hys:

02.0000 PPT >

Save:

>

ENTER

"SAVING"

displayed

E. Selects WET CAL procedure for fi rst

time system setup or periodic system
recalibration.

Menu items F - I repeat for relay 2

setup.

F. Sets relay operation mode Low or

High, and setpoint, 00.0000 - 999999.
units.

G. Sets relay hysteresis, 00.0000 -

999999. units. Set to zero to disable
feature

H. Sets relay minimum and maximum

pulse setpoint, 00.0000 - 999999.
units.

I. Sets relay pulse rate, 000 - 300

pulses/minute.

J. Sets user defi ned setup date for
maintenance records. This feature is

not an internal timer or calendar.

Relay 1 Pulse

H.

00.0000

Relay 1 Rate

I.

120 Pulses/min>

J.

To return to
VIEW:

Last CAL:

01-01-98 >

→

30.0000>

Relay Pulse Mode Selected

Relay 1 Pulse

00.0000

Mode (top row)
Divisor (bottom row)

120 Pulses/min

Mode (top row)
Divisor (bottom row)

To A

quick

press

To restore original value:

→

30.0000>

Relay 1 Rate

Last CAL:

01-01-98

Relay 1 Pulse

10.0000

→

30.0000>

Relay 1 Rate

025 Pulses/min

Last CAL:

02-05-98

quick

press

4 Signet 5900 Salinity Monitor