Georg Fischer 9900 Data Sheet

Signet 9900 Direct Conductivity/Resistivity Module Instruction Sheet

*3-9900.092*

3-9900.092 Rev. A 4/11 English

To interface a stand-alone conductivity sensor (2819-2823 or 2839-2842) to the 9900, the 3-9900.394 Direct
Conductivity Module must be used.

Iso. Ground

Temp. In

Shield

H COMM Module

DC Power

Loop Voltage

Field Mount and Panel Mount
are identical.

SHIELD

TEMP (WHT)

ISO GND (BLK)

SIGNAL (RED)

2819-2823
2839-2842

Cond/Res Module

Signal

Red
Black
White
Shield

Mfr. Part No. Code Description

3-9900.394 159 001 669 Direct Conductivity/Resistivity Module
6682-0204 159 001 709 Conductivity Module Plug, 4 Pos, Right Angle

If the 9900 Base Unit will be mounted in a panel, plug-in modules may be
installed either before or after the base unit is mounted. If the 9900 Base
Unit will be mounted using the accessory wall mount bracket, install plug-in
modules fi rst.

The Conductivity/Resistivity module plugs in and attaches with a screw.

1. It may be helpful to use a standard screwdriver to gently pry
removable terminals away from the receptacle on the plug-in modules.
Reverse this step to reinstall the panel after the plug-in modules are
installed.

2. Remove terminals from the receptacle of each plug-in module prior to
installation.

● Terminals accept 16 to 28 AWG wire.

● Sensor cable length can be extended to 30 m (100 ft) (except 2819
and 2839, limited to 4.6 m (15 ft).

● Strip 10 to 12 mm (0.4 to 0.5 in.) of insulation from wire tips
and tin bare ends to eliminate fraying.

● Insert wire tip or ferrule completely into the terminal and
secure with the screw.

● Do not allow any AC leads that may be connected to the
internal relays to come in contact with low voltage wiring.

CAUTION: Exercise care when

installing module.
Do not bend connecting pins.

Align pins and connectors then push
module fi rmly into place, then attach with
screw.

Avoid Electrostatic Discharge (ESD):

● Minimize handling of module to
reduce the possibility of damage
due to ESD.

● Handle module by the edges. Never
touch any exposed circuitry
or contacts.

● Wear an anti-static wristband or
stand on an anti-static mat, or
keep one hand touching a properly
grounded pipe or other properly
grounded piece of metal when
handling module.

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3-9900.092 Rev. A 04/11 English © Georg Fischer Signet LLC 2011