6
8850-3 Conductivity/Resistivity Transmitter
Select CUSTOM only if you are connecting a certi
fi
ed conductivity sensor. Select STANDARD
for
all
other
systems.
For STANDARD sensors: Select from these options: 0.01, 0.1, 1.0, 10.0 or 20.0.
For CUSTOM sensors: Enter the precise cell constant from the certi
fi
cate provided with your
sensor, or from the information label on the sensor.
Select from the following options:
μ
S, mS, k
Ω
, M
Ω
, PPM.
If the Units selection is PPM, you can set the ratio of Total Dissolved Solids to
μ
S. See
section 3 of this manual for additional information. The TDS factor can only be set in PPM.
Adjust the temperature of the system based on an accurate external reference.
For use with STANDARD sensors: Perform this single-point wet calibration for most accurate
results. Not required for CUSTOM sensors except for periodic system accuracy con
fi
rmation.
Enter all zeroes to restore factory calibration to TEMP and COND settings.
Select the input source to be associated with the current loop output: Conductivity or
Temperature.
Select the minimum and maximum values for the current loop output.
Be sure to modify this setting if you change the Cond. Units.
Select the source for the Open Collector output: Conductivity or Temperature.
Select the mode of operation for the Open Collector output.
Options available are High, Low or proportional Pulse.
The signal may be disabled (Off) if not in use.
In Low or High Mode, this Open Collector output will be activated when the process reaches
this value. Be sure to modify this setting if you change the Cond. Units.
The Open Collector output will be deactivated at Setpoint ± Hysteresis, depending on High or
Low Setpoint selection. (See details on page 4.)
In Pulse mode, set the process values where the proportional pulse will start and where it will
reach the maximum rate. Be sure to modify this setting if you change the Cond. Units.
In Pulse mode, set the maximum rate for the proportional Pulse output. The 8850 will accept
any value from 0 to 400.
Use this “note pad” to record important dates, such as annual recerti
fi
cation or scheduled
maintenance.
Calibrate Menu
Display
(Factory settings shown)
Description
Cell
Constant:
Standard >
Cell:
Standard
1 >
Cell: Custom
1.0000 >
Cond Units:
uS >
PPM Factor:
2.00 >
Set:
Temperature >
Set:
Conductivity >
Loop1 Source:
Cond >
Loop1 Range: uS
0.0000
→
100.000 >
Output1 Source:
Cond >
Output1 Mode:
Low >
Output1 Setpnt:
10.0000
uS >
Output1 Hys:
0.5000
uS >
Output1 Rng: uS
10.0000
→
40.0000 >
Output1 PlsRate:
120
Pulses/Min >
Last
CAL:
04-20-10 >
Settings will repeat for Loop 2 and Output 2.
