DO97-6T
Conductivity transmitter f or in f ield installations and f or panel
mounting
data sheet DS-DO97-6T-i.49.1
SERIES Transmitters
Conductivity transmitters Series DO97-6T receive the signal from
a conductivity cell and from a Pt100 temperature sensor.
The signal from the conductivity cell is thermocompensated and
converted into a 420 mA output signal proportional to the
measured value. The output is galvanically isolated from the
input.
An LCD display allows to locally indicate conductivity value and
temperature value.
The functional parameters of the instrument can be configured
Using the display and the keyboard.
The careful choice of the components make the instrument
accurate and reliable.
Applications:
- drinking water plants
- wastewater treatment plants
- swimming pools
- wherever conductivity is to be measured
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Automatic thermocompensation
Input/output galvanic isolation
Displayed indication of conductivity and temperature
24 Vac power supply or 24 Vdc two wire transmitter version
 Current output 0/420 mA
 Two programmable set points with relay output
Operating principle
Mod.DO97-6T transmitters receive the signal from a conductivity cell and a signal from a temperature sensing
element (Pt100).
The transmitter operate temperature compensation of the signal and give local indication of pH (ORP) value and
temperature value.
The measured value is also retransmitted on a 0/420 mA proportional output, which is galvanically isolated from
the input.
Two programmable set points drive two relay outputs. Relays status is indicated on display.
Realization
Mod.DO9766T transmitter is supplied with IP64 housing, suitable for in field installation.
Mod.DO9786T transmitter is supplied with IP44 housing, suitable for panel mounting.
FURTHER INFORMATION on Instruction Manual n.139.
Available versions
Mod.DO9766T ................................. Conductivity transmitter with IP64 housing, suitable for in field installation.
Mod.DO9786T ................................... Conductivity transmitter with IP44 housing, suitable for panel mounting.
DO97-6T
TECHNICAL DATA
Conductivity input
Measuring range
2/4 electrodes
Transducer supply
Input impedance
Cable length
Accuracy
Temperature input
Pt100 2/4 wires
Transducer supply
Cable length
Accuracy
0.0  199.9 mS
cell constant 0.01199.9 cm-1
configurable
square wave 101000 mV,
according to f.s.
2001600 Hz, according to f.s.
>100 M
up to 10 m if not shielded, up to
50 m if shielded (apprx. 2 nF)
0.5 % of reading, 2 digit ,
thermal drift 0.01%/°C
-50199,9°C
0.5 mA dc
up to 10 m for non shielded cable, up to 50 m for shielded cable (2 nF apprx.)
0.1 % of reading, 0.2°C, thermal drift
0.01%/°C
Mod.DO9766T
Temperature compensation
none
manual
linear 0.004.00%/°C -50+200°C
automatic
linear 0.004.00%/°C -50+200°C
reference temperature 20°C or 25°C, configurable
Current output
420 mA
programmable and proportional to
conductivity
0.5 % of reading, 0.02 mA
2500 Vca, 1 minute
accuracy
isolation
Realys output
A and B
SPDT, 3A/230 Vac,
voltage free
Power supply
passive
1035 V, 420 mA, two
wire transmitter
24 Vac
active
Housing Mod.DO9766T
external dimensions 120 x 122 x 56 mm
protection
IP64
Housing Mod.DO9786T
esternal dimensions 96 x 96 x 126 mm
protection
IP44
CE compliance
Mod.DO9786T
according to perinent rules
Calibration
The instrument is factory calibrated. At start up it is only needed to verify the
calibration of the measuring chain, using a solution with known conductivity value.
More details on Instruction Manual.
Order information for calibration solutions
Mod.
T/401– A
Specify desired conductivity value: 1 mS, 12 mS, 100 mS.
Via del Luisetto,4 20040 Cavenago Brianza –MI- Tel 0039 02 95339721 Fax 0039 02 95339659
Em a i l clrmail@tin.it I n t e r n e t a d d r e s s : www. c l r i t a l i a . c o m
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