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3

8860 Dual Channel Conductivity/Resistivity Controller 

Sensor Input Connections

•  The 8860 will accept two independent sensor input signals.  

The two sensors may be of different cell constant values.

•  Do not route sensor cable in any conduit containing AC power 

wiring - electrical noise may interfere with the signal.

•  Cable shield MUST be maintained through cable splice.
•  Use three conductor shielded cable for cable extensions up 

to 30 m (100 ft) max. for measurements below 10 M

Ω

 (above 

0.10 

μ

S).

•  Maximum cable length for resistivity measurements above 
 10 

M

Ω 

is 25 ft, and solution temperatures must be between

 

20°C and 100°C.

Relay and Open Collector Functions

The 8860 is equipped with 4 SPDT relays that can be con

fi

 gured 

for High alarm, Low alarm, Proportional pulse or USP operation.

• 

Low:

  Output triggers when process variable is less than 

setpoint.

• 

High:

  Output triggers when process variable is higher than 

setpoint.

• 

Off:

  Disables output pulse.

• Pulse 

Operation

 

The output emits a 100 mS pulse at a rate de

fi

 ned by the 

Source, Pulse Range and Max PlsRate settings, and by the 
process condition.  The maximum pulse rate is 400 pulses per 
minute. 

 
 

Example:  As the process falls below 10 

μ

S the output will 

start pulsing in relation to the process value, the max pulse 
endpoint and the programmed pulses/min.  Pulse rate 
will increase as the process approaches the programmed 
endpoint.

SHLD

ISO GND

TEMP

  2

SGNL

 2

SHLD

ISO GND

TEMP

  1

SGNL

 1

RED

WHITE

BLACK

SILVER (SHLD)

RED

WHITE

BLACK

SILVER (SHLD)

Hysteresis

Time

Low Setpoint

Process

Relay energized

Relay relaxed

Hysteresis

Time

High Setpoint

Process

10

5

Relay 1 Rng: μS
10.00 --> 5.00  >

Relay/Open Collector PlsRate:

100 Pulses/min  >

 10 μS 

=  0 pulses/min.

7.5  μS     =  50 pulses/min.
 5 μS  

=  100 pulses/min.

RANGE defines where the pulsing starts 
and where it reaches the maximum rate.

Pulse rate

µS ----->

0 pulses

100 pulses

The Pulse Rate determines what the 

maximum rate will be.  The 8860 maximum 

capability is 400 pulses per minute.

1μS

1MΩ

10μS

100KΩ

1,000μS

10,000μS

50,000μS

200,000μS

100μS

10KΩ

400,000μS

100,000μS

0.054μS
18.3 MΩ

Bottled 

Water 

Brackish Sea Water 

(Salinity) 

UPW @ 25°C 

USP 

Cooling Tower 

Waste Waters 

Deionization Regen. Chemicals 

Alkali Cleaners, Acids/Bases 

Rinse  
Water 

 

3-2819, 3-2839

(0.01 Cell) 

3-2820, 3-2840 

( 0.10 Cell) 

3-2821, 3-2841 

(1.0 Cell) 

3-2822, 3-2842 

(10.0 Cell) 

3-2823 

(20.0 Cell) 

0.010μS

100 MΩ

200μS

Содержание 8860

Страница 1: ...00 to 240 VAC 10 50 60 Hz 20VA or 11 to 24 VDC 10 regulated 0 5 A max 3 8860 11 to 24 VDC 10 regulated 0 5 A max Three 4 to 20 mA Outputs Passive isolated fully adjustable and reversible 4 to 20 mA outputs are independently source selectable Max loop impedance 150 Ω 12 V 450 Ω 18 V 750 Ω 24 V Update rate 100 mS Accuracy 0 03 mA 25 C 24 VDC Open collector outputs 2 available optically isolated 50 m...

Страница 2: ...not insert two wires into a single terminal If necessary splice the wires together before inserting into the terminal RELAY 1 RELAY 2 RELAY 3 RELAY 4 N C N O COM N C N O COM N C N O COM N C N O COM RELAY 3 4 OPEN COLL 3 4 OPEN COLL 4 OPEN COLL 4 OPEN COLL 3 OPEN COLL 3 LOOP 2 LOOP 2 LOOP 3 LOOP 3 LOOP 1 LOOP 1 SHLD ISO GND TEMP 1 SGNL 1 SHLD ISO GND TEMP 2 SGNL 2 POWER OUTPUT OPTION L N 11 24V 0 5...

Страница 3: ...e process condition The maximum pulse rate is 400 pulses per minute Example As the process falls below 10 μS the output will start pulsing in relation to the process value the max pulse endpoint and the programmed pulses min Pulse rate will increase as the process approaches the programmed endpoint SHLD ISO GND TEMP 2 SGNL 2 SHLD ISO GND TEMP 1 SGNL 1 RED WHITE BLACK SILVER SHLD RED WHITE BLACK SI...

Страница 4: ...n Signet Conductivity Resistivity Transmitter C1 23 45µS C2 8 72µS Relay 1 Relay 2 ENTER VIEW menu During normal operation the ProcessPro displays the VIEW menu When using the CALIBRATE or OPTIONS menus the ProcessPro will return to the VIEW menu if no activity occurs for 10 minutes To select the item you want displayed press the UP or DOWN arrow keys The items will scroll in a continuous loop Cha...

Страница 5: ... UP DOWN keys in sequence After entering the Key Code the display will show the first item in the selected menu Step 3 Scroll menu with UP or DOWN arrow keys Step 4 Press RIGHT ARROW key to select menu item to be edited The first display element will begin flashing Step 5 Press UP or DOWN keys to edit the flashing element RIGHT ARROW key advances the flashing element Step 6 Press ENTER key to save...

Страница 6: ...onitored by Relay 1 Cond 1 Cond 2 Temp 1 Temp 2 Function Set Relay 1 activation point The maximum value acceptable is 999999 USP setpoints are high alarms where the setpoint is a percentage below the USP limit Relay 1 will be deactivated at setpoint Hysteresis depending on High or Low selection When the relay Mode is USP defined as a HIGH alarm Hysteresis is displayed in μS Set up to 6400 seconds ...

Страница 7: ... based on the measured temperature Using the USP function In the 8860 USP setpoints are defined as a percentage below the USP limit so a USP alarm is always a HIGH alarm The 8860 can be set to warn you if the conductivity approaches within a set percentage of the USP limit The following settings and conditions are required for a USP relay function 1 In the CALIBRATE menu RELAY MODE must be set to ...

Страница 8: ... 8 sec averaging if your process experiences frequent or extreme fluctuations Set the decimal to the best resolution for your application The display will automatically scale up to this restriction Select or Adjust the minimum and maximum current output The display value represents the precise current output Adjustment limits 3 80 mA 4 00 mA 5 00 mA 19 00 mA 20 00 mA 21 00 mA Use this setting to m...

Страница 9: ...onductivity Siemens 0 000020 Siemens Conductivity Sensor cell e g 0 1 Cell 0 000001 Siemens Simulation resistance Ω 100 000 Ω or 1μS cm 1 μS 1 X 10 6 Siemens or 0 000001 Siemens Connect the conductivity resistor between the Sgnl 1 and Iso Gnd or Sgnl 2 and Iso Gnd terminals Set Cond Adjust the conductivity value based on the resistor value See Editing Procedure and Calibrate menu Verify the linear...

Страница 10: ...lean water less than 0 2 μS Temperature effects are not linear in this range so the temperature coefficient is not easily determined This selection is recommended for all Resistivity applications measuring from 5 MΩ to 18MΩ This selection conforms to ASTM standard D1125 and D5391 Linear This selection allows you to calculate a custom temperature compensation value for Conductivity measurements in ...

Страница 11: ...mal setting in OPTIONS menu Check Calibrate menu settings for incompatible SOURCE and RANGE values Select a value from 0 to 100 Select a value greater than zero Select a pulse rate less than 400 This will remove any user calibration from the Set Conductivity and Set Temperature items in the Calibrate menu Check calibration procedure for accuracy Check sensor for proper operation Check any cable ex...

Страница 12: ...n Certified 3 2819 T2 159 000 082 CR Sanitary 0 01 Titanium 2 in 3 2819 T2C 159 000 084 CR Sanitary 0 01 Titanium 2 in Certified 3 2820 S1 159 000 089 CR Sanitary 0 1 SS 1 to 1 1 2 in 3 2820 S1C 159 000 091 CR Sanitary 0 1 SS 1 to 1 1 2 in Certified 3 2820 S2 159 000 090 CR Sanitary 0 1 SS 2 in 3 2820 S2C 159 000 092 CR Sanitary 0 1 SS 2 in Certified 3 2820 T1 159 000 624 CR Sanitary 0 1 Titanium ...

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