Direct Conductivity/Resistivity Module; H Comm Module - Signet 9900 Operating Instructions Manual

Direct Conductivity/Resistivity Module

Mfr. Part No. Code
3-9900.394 159 001 699
The Direct Conductivity/Resistivity (Cond/Res) Module interfaces Signet 2818-2823 and
2839-2842 Conductivity electrodes directly to the 9900. (Conductivity/Resistivity and Salinity
measurements may also be performed via the 2850 Sensor Electronics connected through
the 9900 Digital (S L) input.)
3
● Provides fi ltering and conditioning.
● Sensor cable length can be extended to 30 m (100 ft).
● 2839 - 2842 sensors come with a cell constant certifi cate to improve the accuracy of
the sensor measurements (see page 38).
Signet Conductivity Module cannot operate when using loop power and requires an
external DC power supply to be used with the 9900 Transmitter (see Power Wiring, pg. 17).
2818 Sanitary

H COMM Module

Mfr. Part No. Code
3-9900.395 159 001 697
The H COMM Module enables communication between the 9900 and a HART
device. The HART (Highway Addressable Remote Transducer) Protocol superimposes digital
signals on top of the 4 to 20 mA analog signal.
Refer to the 9900 H COMM Module Instruction Sheet 3-9900.094 for further details.
NOTE:
With H COMM Module installed, a minimum of 24 V is required for loop-powered systems.
NOTE:
The black rubber jumper adjacent to the power terminal should only be removed when both
the H COMM Module is utilized and the required sensor cable length is over 304 m (1000 ft).
See Appendix for H COMM Module Overview, Installation, Wiring, Operation,
HART Commands, and Unit Code information. (See page 64-69)
HART is a registered trademark of the HART Communication Foundation, Austin, Texas, USA.
®
Any use of the term HART hereafter in this document implies the registered trademark.
Description
Direct Conductivity/Resistivity Module
2819- 2822 2823
2821
Description
H COMM Module
2839-
2842
-enabled
®
Red
Black
White
Shield
NOTE:
The H COMM Module
can run on Loop Power.
9900 Transmitter 5