GF Signet 8860 User Manual

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Page 1

Signet 8860 Dual Channel Conductivity/Resistivity Controller

*3-8860.090*

3-8860.090 Rev. G 11/12 English

English

CAUTION!

• Remove power to unit before wiring input and output connections.

• Follow instructions carefully to avoid personal injury.

• This product should only be used for the purposes and in the manner described in this manual.

Conductivity/Resistivity

Relay 1

Installation

1. Punch out panel and de-burr edges. Recommended clearance on all sides between instruments is 1 inch.

2. Place gasket on instrument, and install in panel.

3. Slide mounting bracket over back of instrument until quick-clips snap into latches on side of instrument.

4. Connect wires to terminals.

5. To remove, secure instrument temporarily with tape from front or grip from rear of instrument. DO NOT RELEASE. Press quick-clips outward and remove.

6. If cleaning is necessary, wipe the front of the unit with a damp cloth.

7. The live contacts on the back of this unit must be covered to avoid accidental shock hazard.

gasket on front side

96mm (3.8 in.)

96 mm

(3.8 in.)

102 mm

(4.0 in.)

Optional Rear Cover

56 mm (2.2 in.)

Panel Cutout

92 x 92 mm

(+ 0.8, - 0 mm)

3.6 x 3.6 in.

(+0.031, -0 in.)

panel

of panel

RELAY 1

COM

N/O

N/C

- OPEN COLL 4

OPTION

OUTPUT

RELAY 3,4

quick-clip

terminals

mounting

RELAY 4

RELAY 3

RELAY 2

COM

N/O

POWER

N/OCOM N/C

N/C

COM

N/O

N/C

OPEN COLL 3

SGNL 2

TEMP 2

ISO GND

SHLD

SGNL 1 MP 1 E T

OPEN

HLD

ISO GND

COLL 3,4

bracket

C1 23.45 µS

C2 8.72 µS

Signet

Transmitter

Relay 2

ENTER

Speciﬁ cations

General

Compatible electrodes: Signet 2818 to 2823 (Standard or

Certiﬁ ed Cond/Resist Sensors)

Enclosure:

• Rating: NEMA 4X/IP65 front (NEMA 4X Rear cover available)

• Case: PBT

• Panel case gasket: Neoprene

• Window: Polyurethane-coated polycarbonate

• Keypad: Sealed 4-key silicone rubber

• Weight: 8860-AC: 0.58 kg (1.28 lb) 8860: 0.55 kg (1.2 lb) Display (Alphanumeric 2 x 16 LCD) :

• Contrast: User selected, 5 levels

• Update rate: 1.5 s Sensor input range:

• Conductivity: 0.01 μS/cm to 400 000 μS/cm

• Resistivity: 10 k•cm to 100 M•cm

• TDS: 0.023 to 200 000 PPM nominal (adjustable μS/PPM)

• Temperature:

-25 °C to 120 °C (-13 °F to 248 °F) PT 1000; 25 ºC = 1096  Accuracy:

• Conductivity/Resistivity: ± 2% of reading

• Temperature: ± 0.5 ºC (0 ºC to 100 ºC)

Electrical

Power requirements: 3-8860-AC: 100 to 240 VAC ± 10% , 50 to 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  @ 12 V, 450  @ 18 V, 750  @ 24 V

• Update rate: ~100 mS

• Accuracy: ±0.03 mA @ 25°C, 24 VDC

Open-collector outputs (2 available, optically isolated):

• 50 mA sink or source, 30 VDC max. pull-up voltage

• Programmable for:

• High or Low setpoint with adjustable hysteresis

• Pulse operation (max. rate: 400 pulses/min)

• USP standards

• Time delay: 0 s to 6400 s.

Relay outputs (up to 4 SPDT relays available)

• Maximum resistive load: 5 A @ 250 VAC, 5 A @ 30 VDC

• Isolation between open contacts: 500 V minimum

• Programmable for:

• High or Low setpoint with adjustable hysteresis

• Pulse operation (max. rate: 400 pulses/min)

• USP standards

• Time delay: 0 s to 6400 s

Environmental

Ambient operating temperature: -10 °C to 55 °C (14 °F to 131 °F)

•

• Storage temperature: -15 °C to 80 °C (5 °F to 176 °F)

• Relative humidity: 0 to 95%, non-condensing

• Maximum altitude: 2000 m (6562 ft)

• Insulation category: II

• Pollution degree: 2

Standards and Approvals

• EN61326: Immunity & Emissions for Control Equipment

• EN61010: Safety UL listed Manufactured under ISO 9001 for Quality, ISO 14001 for Environmental Management and OHSAS 18001 for Occupational Health and Safety. China RoHS (Go to www.gfsignet.com for details)

Declaration of Conformity according to FCC Part 15

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and, (2) This device must accept any interference received, including interference that may cause undesired operation.

Page 2

Electrical Connections

Caution: Failure to fully open terminal jaws before removing wire may permanently damage instrument. This product must be provided with a means to disconnect all current carrying conductors connected to the main AC line, or, as part of the building installation.

Wiring Procedure

1. Remove 9 mm to 12 mm (0.35 in. to 0.47 in.) of insulation from wire end.

2. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.

3. Insert exposed (non-insulated) wire end in terminal hole until it bottoms out.

4. Release orange terminal lever to secure wire in place. Gently pull on each wire to ensure a good connection.

Wiring Removal Procedure

1. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.

Wiring Tips:

• Do not route sensor cable in conduit containing AC power wiring - electrical noise may interfere with sensor signal.

• Routing sensor cabling in grounded metal conduit may prevent moisture damage, electrical noise, and mechanical damage.

• Seal cable entry points to prevent moisture damage.

• Do 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

Electrical shock hazard exists!

Never connect live AC lines to the instrument.

Always connect a ground wire to the ground terminal when using AC power.

Caution:





N/C N/O COM N/C N/O COM N/C N/O COM N/C N/O COM

- OPEN COLL 4

- OPEN COLL 3

+ OPEN COLL 4

+ OPEN COLL 3

- LOOP 1

- LOOP 2

+ LOOP 1

- LOOP 3

+ LOOP 2

+ LOOP 3

POWER

LISTED

E171559

OUTPUT OPTION

OPEN

COLL 3,4

RELAY 3,4

SHLD

ISO GND

SGNL 1

TEMP 1

SHLD

ISO GND

Output Option Switch

• In OPEN COLLECTOR position, relays 3 and 4 are open collector outputs as shown.

• In RELAY 3, 4 position, relays 3 and 4 are dry contact relays identical to relays 1 and 2.

• The menu references in the 8860 display will not change. Outputs 3 and 4 will be identiﬁ ed as "Relay" regardless of switch setting.

LR92369

SGNL 2

TEMP 2

100 - 240V

50-60Hz, 20VA

11 - 24V

0.5 A

3-8860.610 D

4 to 20 mA loop Outputs

The current loops in the 8860 are passive circuits. 12-24VDC must be provided from an external source. A single loop is illustrated for clarity.

8860 4 to 20 mA outputs

Loop 1

Loop 2

+ +

Loop 3

Internal open-collector

output circuit

Outputs

PLC or Recorder

Channel 1 4-20 mA in

Channel 2 4-20 mA in

Channel 3 4-20 mA in

12-24 VDC

Power

Supply

8860 Dual Channel Conductivity/Resistivity Controller

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Sensor Input Connections

Hysteresis

Time

Low Setpoint

Process

Relay energized

Relay relaxed

Hysteresis

Time

High Setpoint

Process

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.

• 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 (above

0.10 μS).

• Maximum cable length for resistivity measurements above

10 Mis 25 ft, and solution temperatures must be between 20 °C and 100 °C.

0.010μS 100 MΩ

UPW @ 25°C

0.054μS

18.3 MΩ

Bottled

USP

Rinse Water

3-2820, 3-2840 ( 0.10 Cell)

3-2819, 3-2839

1μS 1MΩ

10μS

100KΩ

Water

3-2822, 3-2842 (10.0 Cell)

3-2821, 3-2841 (1.0 Cell)

(0.01 Cell)

100μS

10KΩ

3-2823

1,000μS 10,000μS

200μS

Cooling Tower Waste Waters

Brackish Sea Water

(Salinity)

50,000μS

Deionization Regen. Chemicals

Alkali Cleaners, Acids/Bases

(20.0 Cell)

200,000μS

400,000μS

100,000μS

SHLD

ISO GND

TEMP 1

SGNL 1

RED WHITE BLACK

SILVER (SHLD)

Relay and Open Collector Functions

The 8860 is equipped with 4 SPDT relays that can be conﬁ 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.

SILVER (SHLD) BLACK

WHITE

RED

SHLD

ISO GND

SGNL 2

TEMP 2

• Pulse Operation

The output emits a 100 mS pulse at a rate deﬁ 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 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.

38860 Dual Channel Conductivity/Resistivity Controller

Page 4

Signet

Conductivity/Resistivity

Transmitter

C1 23.45 µS

C2 8.72 µS

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. Changing the display selection does not interrupt system operations.

• No keycode is necessary to change display selection.

• Output settings cannot be edited from the VIEW menu.

View Menu

Display Description

C1 1000.00 μS/cm C2 30.00 μS/cm

Monitor C1 Conductivity and C2 Conductivity simultaneously. This is the permanent display when Channel 2 is ON.

C1 1000.00 μS/cm

25.0 ºC

Monitor Channel 1 Conductivity and Channel 1 Temperature. This is the permanent display when Channel 2 is OFF.

The VIEW displays below are temporary. The permanent display will return after 10 minutes

C2 30.00 μS/cm

25.0 ºC

Monitor Channel 2 Conductivity and Channel 2 Temperature. This view is available only when Channel 2 is ON.

Reject C1 → C2

97.00

Monitor Percent Reject, Difference, or Ratio (Channel 1 to Channel 2 or Channel 2 to Channel 1)

Loop 1 12.03 mA Loop 2 5.69 mA

Monitor Loop 1 and Loop 2 current output simultaneously.

Loop 3 13.7 mA

Monitor Loop 3 and status of Relays 3 and 4 (Open Collector 3 and 4).

R3 ON R4 PLS

Last Cal

Monitor date for scheduled maintenance or date of last calibration.

04-20-08

8860 Dual Channel Conductivity/Resistivity Controller

Page 5

ProcessPro Editing Procedure:

Relay1 Setpnt:

0.00 uS Relay1 Setpnt:

0.00 uS

ENTER

Relay1 Setpnt:

.00 uS

Relay Setpnt:

.00 uS

Relay1 Setpnt:

Saving

Relay1 Setpnt:

19.00 uS >

20.00 uS >

Relay 1 Setpnt:

Standard >

Chan 1 Cell:

CALIBRATE: ----

Enter Key Code

CALIBRATE: *---

Enter Key Code

CALIBRATE: **--

Enter Key Code

CALIBRATE: ***-

Enter Key Code

Standard >

Chan 1 Cell:

Step 1. Press and hold ENTER key:

• 2 seconds to select the CALIBRATE menu.

• 5 seconds to select the OPTIONS menu.

Step 2. The Key Code is UP-UP-UP-DOWN keys in sequence.

• After entering the Key Code, the display will show the ﬁ rst 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 ﬁ rst display element will begin ﬂ ashing.

Step 5. Press UP or DOWN keys to edit the ﬂ ashing element.

• RIGHT ARROW key advances the ﬂ ashing element.

Step 6. Press ENTER key to save the new setting and return to Step 3.

Notes on Step 1:

• The View Menu is normally displayed.

• The CALIBRATE and OPTIONS menus require a KEY CODE.

Press & hold for access:

VIEW

ENTER

Notes on Step 2:

If no key is pressed for 5 minutes while display is showing "Enter Key Code", the display will return to the VIEW menu.

2s 5s

CALIBRATE

OPTIONS

Notes on Steps 3 and 4:

• Refer to pages 6 and 7 for complete listing of menu items and their use.

• From the Step 3 display, pressing the UP and DOWN keys simultaneously will return the display to the VIEW menu.

• If no key is pressed for 10 minutes, display will also return to the VIEW menu.

Step 3: Finished Editing?

Press the UP and DOWN keys simultaneously after saving the last setting to return to normal operation.

First item in CALIBRATE menu

Step 3

Step 4

Notes on Steps 5 and 6:

• All output functions remain active during editing.

• Only the ﬂ ashing element can be edited.

• RIGHT ARROW key advances the ﬂ ashing element in a continuous loop.

• Edited value is effective immediately after pressing ENTER key.

• If no key is pressed for 10 minutes unit will restore the last saved value and return to step 3.

• Step 6 (pressing ENTER key) always returns you to Step 3.

• Repeat steps 3-6 until all editing is completed.

Step 5: Made an Error?

Press the UP and DOWN keys simultaneously while any element is ﬂ ashing. This will recall the last saved value of the item being edited and return you to Step 3.

Step 5

Step 6

58860 Dual Channel Conductivity/Resistivity Controller

Page 6

Calibrate Menu

Display

(Factory settings shown)

Chan 1 Cell: Standard >

Description

Select CUSTOM only if you are connecting a certiﬁ ed conductivity sensor. Select STANDARD for all non-certiﬁ ed sensors.

Chan 1 Cell:

1.0 >

Cell: Custom

1.0000 >

Chan 1 Set: Temperature >

Chan 1 Set: Conductivity >

Chan 1 Units: uS/cm >

Chan 1 TDS:

2.0000 uS/PPM >

Function: Reject C1 → C2 >

Loop 1 Source: Chan 1 Cond >

For STANDARD sensors: Select the nominal cell constant: 0.01, 0.1, 1.0, 10.0 or 20.0.

For CUSTOM sensors: Enter the precise cell constant from the certiﬁ cate provided with your sensor, or from the information label on the sensor.

Adjust the temperature of the system based on an accurate external reference.

This single-point wet calibration procedure requires a test solution of known value. Enter all zeroes here to restore TEMPERATURE and CONDUCTIVITY to factory calibration.

Select the units of measure: μS/cm, mS/cm, kΩ•cm, MΩ•cm, PPB, PPM

If the Units selection is PPM or PPB, set the ratio of μS to Total Dissolved Solids. The factory preset value is 2 μS per 1 PPM of TDS. (Always μS/PPM, even if units is PPB). See page 10 for additional information.

Select a functional relationship between C1 and C 2: • Ratio is (C1:C2) or (C2:C1)

• Percent Reject is 100%(1-C2/C1) or 100%(1-C1/C2) • Difference is (C1-C2) or (C2-C1)

Select the measured value or calculated FUNCTION you want Loop 1 to represent: Chan 1 Cond, Chan 2 Cond, Chan 1 Temp, Chan 2 Temp, or Function

Loop 1 Range: uS

0.0000 → 100.000 >

Relay 1 Mode: Low >

Relay 1 Source: Chan 1 Cond >

Relay 1 Setpnt:

10.0000 uS >

Relay 1 Hys:

0.5000 uS >

Relay 1 Delay:

10.0 secs >

Relay 1 Rng: uS

10.0000 → 40.0000 >

Relay 1 PlsRate: 120 Pulses/Min >

Set the minimum (4 mA =) and maximum (20 mA =) range for Loop 1. Make sure that the values are consistent with the units of the source.

Select operating mode for Relay 1: OFF, LOW, HIGH, USP or PULSE. For USP mode: • Relay 1 SOURCE must be Cond 1 or Cond 2

• Temp Comp (Options menu) must be set to None

Select the INPUT SIGNAL (or FUNCTION) monitored 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 (deﬁ ned as a HIGH alarm), Hysteresis is displayed in μS.

Set up to 6400 seconds delay time for relay response. Relay 1 will be activated only if the source value exceeds the setpoint for this time period.

If Relay 1 is PULSE mode, set the start and end point of the conductivity range and also set the maximum pulse rate. (The maximum PULSE rate setting is 400 pulses per minute.)

The combined Relay 1 Range and Pulse rate settings shown here indicate: "Start pulsing when the conductivity value is 10 μS and increase the pulse rate up to the maximum of 120 pulses per minute when the conductivity value reaches 40 μS"

Last CAL: 04-20-08 >

• All changes in this menu become effective when saved, except the "Set Cond" and "Set Temp" settings.

• All outputs affected by a change in the "Set Cond" and "Set Temp" settings are frozen until you exit the Calibrate menu.

Use this "notepad" to record important dates, such as annual recertiﬁ cation or scheduled maintenance.

8860 Dual Channel Conductivity/Resistivity Controller

Page 7

USP Limits

USP (United States Pharmacopoeia) has deﬁ ned a set of conduc- tivity values (limits) to be used for pharmaceutical water monitoring. This standard requires non-temperature compensated conductivity measurement be used to warn if the con ductance approaches the USP limit. The limits vary according to the temperature of the sample. The 8860 has the USP limits stored in memory. It will automatically determine the proper USP limit based on the measured temperature.

Using the USP function

In the 8860, USP setpoints are deﬁ ned 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 USP.

• RELAY SOURCE must be Chan 1 or Chan 2 Cond.

• SOURCE UNITS must be set to μS.

2. In the OPTIONS menu:

• The TC Mode of the USP channel must be set to None.

(Service tip: If a relay is constantly on when it should be off, check the relay settings listed above.)

Example:

• The USP setpoint is 40%.

• The water temperature is 19 ºC, so the USP limit is 1.0 μS.

• The relay will be activated when the conductivity value reaches

0.6 μS, or 40% below the 1.0 USP limit.

• If the water temperature drifts to more than 20 ºC, the 8860 will automatically adjust the USP limit to 1.1.

• The relay will now be activated when the conductivity value reaches 40% below 1.1 μS, or 0.66 μS.

When the

temperature

range is:

The USP limit

(μS) is:

0 ºC to < 5 ºC 0.6

5 ºC to < 10 ºC 0.8

10 ºC to < 15 ºC 0.9

15 ºC to < 20 ºC 1

20 ºC to < 25 ºC 1.1

25 ºC to < 30 ºC 1.3

30 ºC to < 35 ºC 1.4

35 ºC to < 40 ºC 1.5

40 ºC to < 45 ºC 1.7

50 ºC to < 55 ºC 1.8

55 ºC to < 60 ºC 2.1

60 ºC to < 65 ºC 2.2

65 ºC to < 70 ºC 2.4

70 ºC to < 75 ºC 2.5

75 ºC to < 80 ºC 2.7

80 ºC to < 85 ºC 2.7

85 ºC to < 90 ºC 2.7

90 ºC to < 95 ºC 2.7

95 ºC to < 100 ºC 2.9

100 ºC to < 105 ºC 3.1

78860 Dual Channel Conductivity/Resistivity Controller

Page 8

Options Menu

Display

(Factory settings shown)

Contrast:

3 >

Temp Display:

ºC >

Channel 2:

On >

Power:

60 Hz >

Chan 1 TC Mode:

Linear >

Chan 1 TC Slope:

0.00 % >

Description

Adjust the LCD contrast for best viewing. A setting of 1 is lower contrast, 5 is higher. In general, select lower contrast if the display is in warmer ambient surroundings.

Select ºC or ºF.

Turn CH 2 OFF if not in use. This will remove all menu functions related to CH 2.

Select 50 Hz or 60 Hz electrical noise suppression, according to the AC power used in your area. Select the proper setting for all applications, whether AC or DC powered.

Set the method for temperature compensation to NONE, LINEAR or PURE WATER. You must select NONE for USP systems. Select LINEAR for applications where the water is less than 5 MΩ (or greater than 0.2 μS). Select PURE WATER for applications where the water is greater than 5 MΩ (or less than 0.2 μS).

For LINEAR or PURE WATER temperature compensation, select a % per ºC slope. Maximum slope setting is 9.99 % per ºC. If Temp Comp setting is NONE, this item will not be displayed.

Averaging:

OFF provides the most instantaneous response to process changes. Select LOW (4 sec) or HIGH (8 sec) averaging if your process experiences frequent or extreme ﬂ uctuations.

Off >

Chan 1 Decimal:

Set the decimal to the best resolution for your application. The display will automatically scale up to this restriction. Select *****., ****.*, ***.** **.*** or *.****

*.**** >

Loop 1 Adjust:

4.00 mA >

Loop 1 Adjust:

20.00 mA >

Relay 3 Active:

High >

Test Loop 1:

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 match the system output to any external device. These settings repeat for Loop 2 and Loop 3.

Select active HIGH or active LOW operation for relay 3 Recommended: Use active LOW if OUTPUT OPTION switch is set for OPEN COLLECTOR operation. Active HIGH: Power is applied to relay coil when process value reaches SETPOINT. Active LOW: Power is removed from relay coil when process value reaches SETPOINT.

Press UP and DOWN keys to manually change Loop 1output current. Limits are 3.6 mA to 21.00 mA. Hold UP or DOWN keys to scroll the output value.

Test Relay 1:

Press UP and DOWN keys to manually toggle the relay state.

Notes: Channel settings will repeat when Channel 2 is enabled. Loop settings will repeat for Loop 2 and Loop 3. Check setting for related values when making changes (for example, if temp is set for ºC with a temp alarm at 25 ºC, and you change the temp to ºF, be sure to change the alarm setpoint to 77 ºF.) Relay settings will repeat for Relays 2, 3 and 4 (except "Relay Active" selection; applies to Relay 3 and 4 only.)

8860 Dual Channel Conductivity/Resistivity Controller

Page 9

Calibration Procedure

The 8860 has been electronically calibrated at the factory.

• Procedure A veriﬁ es the accuracy and linearity of the 8860 by simulating temperature and conductivity values with precision (±0.1%) ﬁ xed resistors.

• Procedure B is a wet calibration. This procedure uses the sensor input and NIST traceable test solutions.

A) Accuracy Veriﬁ cation with Precision Resistors (Electronic Calibration):

1. Simulate the Temperature

The temperature input to the 8860 is a PT-1000 thermistor, where 1000 Ohms () is equal to 0 ºC and a change of 3.84  equals a

1 ºC change. (1000  = 0 ºC, 1003.84 = 1.0 ºC, 1007.68  = 2.0 ºC...................1096  = 25 ºC)

• Connect a resistor (1000  to 1096 ) between "Temp" and "Iso. Gnd" terminals.

• Set Temp: Adjust the temperature to exact value based on the measured resistance. (See Editing Procedure, Calibrate menu).

• To verify the 8860 temperature linearity, connect a second resistor value to the terminals.

• If the 8860 does not display the correct value, service is required. ( ± 0.5 ºC)

2. Simulate the Conductivity

You may calculate the exact Resistance needed to simulate a speciﬁ c conductivity value , or you may calculate the exact Conductivity based on a resistor value:

Resistance = Cell constant e.g. 0.1 Cell = 5,000  or 5 k conductivity (Siemens*) 0.000020 (Siemens*)

Conductivity = Sensor cell e.g. 0.1 Cell = 0.000001 Siemens* Simulation resistance () 100,000 () or 1μS/cm

-6

(*1 μS = 1 X 10

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 linearity of the 8860 by connecting a second Conductivity resistor of a different value.

• If the 8860 does not display the correct value (± 2% of reading), service is required.

B) Wet Calibration with NIST Traceable Solutions:

When using NIST traceable standards, review the temperature information provided with the test solution. Prevent contamination of the test solution. The sensor must be at the temperature speciﬁ ed on the test solution label.

• Remove the sensor from the system. Rinse the sensor in a small amount of test solution.

• Place the sensor into the test solution.

• Place a reference thermometer into the same solution.

• Allow sufﬁ cient time for the temperature to stabilize.

• Set Temp: Adjust the temperature value based on the reference thermometer. (See Editing Procedure.)

• Set Cond: Adjust the conductivity value based on the test solution value. (See Editing Procedure.)

• Verify the linearity of the 8860 by placing the sensor into a second test solution of a different value.

• If the 8860 does not display the correct value (Temperature ± 0.5 ºC, Conductivity ± 2% of reading), service is required.

98860 Dual Channel Conductivity/Resistivity Controller

Page 10

Temperature Effects

Conductivity measurement is highly dependent on temperature. The basic rule is that higher temperatures result in greater conductance (less resistance). Temperature effects are expressed as the percentage of conductivity change (in μS) per °C. The conductivity value is generally referenced to 25 ºC. The 8860 has three temperature compensation options:

None

USP standards for pharmaceutical waters require that the measurement be made without temperature compensation. USP limits are discussed on page 7.

Pure Water (Standard Compensation)

This selection is used for measurements of very clean water, less than 0.2 μS. Temperature effects are not linear in this range, so the temperature coefﬁ cient is not easily determined. This selection is recommended for all Resistivity applications measuring from 5 M to 18 M. 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 the range of 0.2 μS and greater (Resistivity applications measuring less than 5 M). The procedure is outlined in the section on the right.

Calculating a Linear Temperature Coefﬁ cient

1. Set TC Mode to NONE (see OPTIONS menu, page 8).

2. Heat a sample solution close to the maximum process

temperature. Place sensor in the sample solution and allow several minutes for stabilization. Record the 8860 temperature and conductivity values in the spaces provided:

Displayed temperature: T1 = _______ °C

Displayed conductivity: C1 = _______ μS

3. Cool the sample solution close to the minimum process temperature. Place sensor in the sample solution allowing several minutes for stabilization. Record displayed temperature and conductivity values in the spaces provided:

Displayed temperature: T2 = _______ °C

Displayed conductivity: C2 = _______ μS

(A 10% change in conductivity between steps 2 and 3 is

recommended.)

4. Substitute recorded readings (steps 2 and 3) into the following

formula:

TC Slope = 100 x (C1 - C2) (C2 x (T1 - 25)) - (C1 x (T2 - 25))

TDS Factor

Some industries need to display a conductivity value as Total Dissolved Solids (TDS), measured in units of parts per million (PPM) or parts per billion (PPB).

• 1 PPM is equivalent to 1 mg per liter.

• 1 PPB is equivalent to 1 μg per liter.

• The 8860 calculates PPM or PPB by dividing the μS value

by a TDS Factor that you deﬁ ne. TDS factors can vary widely, ranging from 1.50 μS to 2.50 μS per PPM. Methods for establishing a TDS factor are beyond the scope of this manual.

• The 8860 will accept TDS factor values from 0.01 μS to

99999.9 μS per PPM.

(factory preset = 2.00 μS per PPM)

NOTE: The 8860 TDS factor must be set in PPM.

Example: A sample solution has a conductivity of 205 μS @ 48 °C. After cooling the solution, the conductivity was measured at 150 μS @ 23 °C. (C1 = 205, T1 = 48, C2 = 150, T2 = 23)

The TC is calculated as follows:

TC Slope = 100 x (205 - 150) =5500 = 1.42%/°C (150 x (48 - 25)) - (205 x (23 - 25)) 3860

TDS Factor = Conductivity (μS) ÷Total dissolved solids (PPM) PPM = Solution conductivity (μS) ÷ TDS Factor

Example:

• Solution conductivity = 150 μS

• TDS = 80 PPM

• TDS Factor = 150 μS ÷ 80 PPM = 1.88 μS per PPM

8860 Dual Channel Conductivity/Resistivity Controller

Page 11

Troubleshooting

Display Condition Suggested SolutionsPossible Causes

"- - - -"

"Value Must be 100 or less"

"Value must be more than 0"

"Value must be 400 or less"

"Reset to Factory Calibration"

"Too Much Error CHECK SENSOR"

Display is over range. This may be a normal condition if your process operates at/near the limits of the sensor range.

The menu item being set is a percentage value and must be less than 100.

The menu item being set cannot be zero or a negative value.

The Pulse Rate for Relay and Open Collector outputs cannot be greater than 400 pulses per minute.

A value of "0" is being set into ".. Set: Conductivity" menu item.

The calibration offset entered is beyond the allowable tolerances of the instrument.

Check sensor for correct range. Check Decimal 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 extensions for poor splices or termination.

Technical Note

If a Current Loop is locked at 3.6 mA, the problem is related to the temperature circuit: This occurs only if the 8860 detects a resistance from the temperature sensor that is less than 250 Ω or greater than 2800 Ω.

• Check the sensor wiring for open/short or poor connections on white (TEMP IN) and black (ISO GND)wires.

• The PT1000 temperature device in the sensor is defective.

• The transmitter is defective.

118860 Dual Channel Conductivity/Resistivity Controller

Page 12

Ordering Information

Mfr. Part No Code Description

3-8860 159 000 677 Conductivity/Resistivity Controller, DC 3-8860-AC 159 000 678 Conductivity/Resistivity Controller, AC

Accessories

Mfr. Part No Code Description

3-8050.395 159 000 186 NEMA 4X Rear Cover 3-9000.392 159 000 368 Liquid-tight Connector Kit for rear cover (includes 3 connectors) 3-8050.392 159 000 640 Model 200 Retroﬁ t Adapter 3-5000.399 198 840 224 5x5 inch Adapter Plate for Signet retroﬁ t 3-0000.596 159 000 641 Heavy Duty Wall Mount Bracket 3-5000.598 198 840 225 Surface Mount Bracket 3-8050.396 159 000 617 RC Filter Kit (for relay use) 7300-7524 159 000 687 Power Supply, 7.5W 24 V 7300-1524 159 000 688 Power Supply, 15W 24 V 7300-3024 159 000 689 Power Supply, 30W 24 V 7300-5024 159 000 690 Power Supply, 50W 24 V 7300-1024 159 000 691 Power Supply, 100W 24 V

Conductivity/Resistivity Electrodes

Mfr. Part No. Code Description

3-2818-1 159 001 718 Conductivity/Resistivity (CR) Cell, 0.01, SS 3-2819-1 198 844 010 CR Cell, 0.01, SS 3-2820-1 198 844 000 Conductivity Cell, 0.1, SS 3-2821-1 198 844 001 Conductivity Cell, 1.0, SS 3-2822-1 198 844 002 Conductivity Cell, 10, SS 3-2823-1 198 844 003 Conductivity Cell, 20, SS 3-2819-S1 159 000 085 CR Sanitary, 0.01, SS, 1 to 1 1/2 in. 3-2819-S1C 159 000 087 CR Sanitary, 0.01, SS, 1 to 1 1/2 in., Certiﬁ ed 3-2819-S2 159 000 086 CR Sanitary, 0.01, SS, 2 in. 3-2819-S2C 159 000 088 CR Sanitary, 0.01, SS, 2 in., Certiﬁ ed 3-2819-T1 159 000 081 CR Sanitary, 0.01, Titanium, 1 to 1 1/2 in. 3-2819-T1C 159 000 083 CR Sanitary, 0.01, Titanium, 1 to 1 1/2 in., Certiﬁ ed 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., Certiﬁ ed 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., Certiﬁ ed 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., Certiﬁ ed 3-2820-T1 159 000 624 CR Sanitary, 0.1, Titanium, 1 to 1 1/2 in. 3-2820-T2 159 000 625 CR Sanitary, 0.1, Titanium, 2 in. 3-2821-S1 159 000 093 CR Sanitary, 1.0, SS, 1 to 1 1/2 in. 3-2821-S1C 159 000 095 CR Sanitary, 1.0, SS, 1 to 1 1/2 in., Certiﬁ ed 3-2821-S2 159 000 094 CR Sanitary, 1.0, SS, 2 in. 3-2821-S2C 159 000 096 CR Sanitary, 1.0, SS, 2 in., Certiﬁ ed 3-2821-T1 159 000 626 CR Sanitary, 1.0, Titanium, 1 to 1 1/2 in. 3-2821-T2 159 000 627 CR Sanitary, 1.0, Titanium, 2 in. 3-2839-1 159 000 921 Conductivity Cell, 0.01, 15 ft cable, NPT 3-2839-1D 159 000 923 Conductivity Cell, 0.01, 15 ft cable, ISO 3-2840-1 159 000 786 Conductivity Cell, 0.1, 15 ft cable, NPT 3-2840-1D 159 000 788 Conductivity Cell, 0.1, 15 ft cable, ISO 3-2841-1 159 000 790 Conductivity Cell, 1.0, 15 ft cable, NPT 3-2841-1D 159 000 792 Conductivity Cell, 1.0, 15 ft cable, ISO 3-2842-1 159 000 794 Conductivity Cell, 10.0, 15 ft cable, NPT 3-2842-1D 159 000 796 Conductivity Cell, 10.0, 15 ft cable, ISO

NOTE: Alternate wetted materials and lengths are available through special order. Cable length extensions to 30 m (100 ft) are available through special order.

Georg Fischer Signet LLC, 3401 Aero Jet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057 For Worldwide Sales and Service, visit our website: www.gfsignet.com • or call (in the U.S.): (800) 854-4090 For the most up-to-date information, please refer to our website at www.gfsignet.com