GF SIGNET 8850 Conductivity/Resistivity Transmitter Instructions ENGLISH 8850.090 A9/99 English CAUTION! Remove power to unit before wiring input and output connections. Follow instructions carefully to avoid personal injury. Contents. Installation. Specifications. Electrical Connections. Menu Functions Conductivity/Resistivity 6.50 us 5.0 C Relay Relay. Installation The transmitter is available in two versions: a panel mount version, and an integral version for installation near the sensor (universal assembly). Panel Installation The Panel Mounting kits are supplied with the hardware to install instrumentation into panels and maintain a NEMA X seal.. Punch out panel and deburr edges. Recommended clearance on all sides between instruments is inch.. Place gasket on instrument, and install in panel.. Slide mounting bracket over back of instrument until quickclips snap into latches on side of instrument.. Connect wires to terminals. 5. To remove, secure instrument temporarily with tape from front or grip from rear of instrument. DO NOT RELEASE. Press quickclips outward and remove. gasket latch panel terminals mounting bracket quickclip. Universal Assembly. Install transmitter base (8050). Connect wires to transmitter.. Close unit and secure with push and twist lock. Seal cable entry. wires seal. Specifications General Compatible electrodes: GF SIGNET 8XX Standard and Certified Series Conductivity/Resistivity Electrodes Accuracy: ±% of reading Enclosure: Rating: NEMA X/IP65 front Case: PBT Window: Polyurethane coated polycarbonate Keypad: Sealed key silicone rubber Weight: Approx. 5g ( oz.) Display: Alphanumeric x 6 LCD Contrast: User selected, 5 levels Update rate: second Environmental Operating temperature: 0 to 70 C ( to 58 F) Storage temperature: 5 to 80 C (5 to 76 F) Relative humidity: 0 to 95%, noncondensing Standards and Approvals CSA, CE, UL listed Manufactured under ISO 900 Electrical Sensor input range: Conductance: 0.055 to 00,000 µs Resistivity: 0 KΩ to 8.6 MΩ TDS: 0.0 to 00,000 ppm GF SIGNET 8850 Conductivity/Resistivity Transmitter Instructions Sensor Models Ultra Pure Pure Rinse GF SIGNET Sensor Ranges 8 8 8 80 89 0.055 0 00 00,000 0,000 00,000 00,000 (8 MΩ) (0 kω) Conductivity Range (µs) Sensor input range: Temperature: PT 000, 5 to 0 C ( to 8 F) Current output: to 0 ma, isolated, fully adjustable and reversible : to VDC ±5%, regulated Max loop impedance: 50 Ω max. @ V, 5 Ω max. @ 8 V, 600 Ω max. @ V Update rate: 0.5 seconds Accuracy: ±0.0 ma @ 5 C, V Relay outputs ( sets): Mechanical SPDT contacts: Hi, Lo, Pulse Programmable Maximum voltage rating: 5 A @ 0 VDC, or 5 A @ 50 VAC resistive load Hysteresis: User Adjustable page of 8
Panel Mount Field Mount 96mm (.8 in.) 96 mm (.8 in.) Panel Cutout 96 mm (.8 in.) Optional Rear Cover 9 x 9 mm ( 0.8, 0 mm).6 x.6 in. (0.0, 0 in.) 96 mm (.8 in.) mm (.6 in.) 97 mm (.8 in.) 56 mm (. in.) 06 mm (.8 in.). Electrical Connections Caution: Failure to fully open terminal jaws before removing wire may permanently damage instrument. Wiring Procedure. Remove 0.5 0.65 in. (6 mm) of insulation from wire end.. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.. Insert exposed (noninsulated) wire end in terminal hole until it bottoms out.. Release orange terminal lever to secure wire in place. Gently pull on each wire to ensure a good connection. Wiring Removal Procedure. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.. When fully open, remove wire from terminal... System /Loop. System /Loop. System /Loop Description VDC VDC ±5%, system power and current loop connections. Max. loop impedence: 50 Ω max @ V, 600 Ω max. @ V. Relays 5. Relay NC contact 6. Relay COM contact 7. Relay NO contact 8. Relay NC contact 9. Relay COM contact 0. Relay NO contact Sensor Input. Red (Signal IN). White (Temp IN). Black (ISO GND). Shield (Sensr GND) Relay / contact sets programmable as: High/Low alarm with adjustable hysteresis Proportional pulse output Disable (Off) selection System Pwr Loop System Pwr Loop 0 9 8 7 6 5 Relay (NO) Relay (COM) Relay (NC) Relay (NO) Relay (COM) Relay (NC) Sensr Gnd (SHIELD) Iso. Gnd (BLACK) Temp. IN (WHITE) Signal IN (RED) 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. When placing two wire ends into a single terminal, solder or crimp ends together. page of 8 GF SIGNET 8850 Conductivity/Resistivity Transmitter Instructions
. System /Loop Connections Standalone application, no current loop used Connection to a PLC with builtin power supply Transmitter Loop Loop DC V Transmitter Loop Loop Internal PLC Connection PLC Ground Loop Input 0 ma Loop Input 0 ma Connection to a PLC/Recorder, separate supply Transmitter Loop Loop PLC or Recorder DC V Loop Input 0 ma in Loop Input 0 ma in Example: Two transmitters connected to PLC/Recorder with separate power supply Transmitter DC V Loop Loop Transmitter Loop Loop PLC or Recorder Channel 0 ma in Channel 0 ma in Channel 0 ma in Channel 0 ma in. Sensor Input Connections Wiring Tip: Do not route sensor cable in any conduit containing AC power wiring electrical noise may interfere with the signal. Shield (Sensor Gnd) Black (Iso Gnd) White (Temp In) Red (Signal In) GF SIGNET 8XX Standard and Certified Cells. Relay Functions Low: Output triggers when process variable is less than setpoint. High: Output triggers when process variable is higher than setpoint. Example: In Low Alarm Mode Operation, the output becomes active when the process drops below the setpoint, and becomes inactive when the process rises above the setpoint plus hysteresis. The opposite is true for High Alarm Mode. Hysteresis Setpoint Process Output Active Output Inactive Time GF SIGNET 8850 Conductivity/Resistivity Transmitter Instructions Off: Disables output. Proportional Pulse Mode Operation The output emits a 00 ms pulse (simulated contact closure) at rate defined by the Output, Pulse Range, Output Rate, and the process condition (0 to 00 pulses/minute, as programmed) Example: As the process falls below 0 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. 0 = pulses/min. 7.5 = 50 pulses/min. 5 = 00 pulses/min. Pulse rate 5 00 pulses Relay or Relay Output Rate: 00 Pulses/min> Relay : Pulse 0.0000 5.0000> 0 Start max. pulse endpoint 0 pulses Process variable page of 8
. Menu Functions VIEW Menu: is displayed during standard operation. Press UP or DOWN buttons to view process parameters. Press UP and DOWN buttons at the same time, to exit any other display and return to VIEW menu. Display will return to VIEW menu in 0 minutes unless a key is pressed. CALIBRATE Menu: contains display setup and output parameters. A security code feature prevents unauthorized tampering. To access CALIBRATE menu: Press button for seconds to display: Press UP, UP, UP, DOWN buttons in sequence to display: CALIBRATE: Enter Key Code CALIBRATE: XXXX Enter Key Code OPTIONS Menu: contains setup and display features for minor display or output adjustments. To access OPTIONS menu: Press button for 5 seconds to display: Press UP, UP, UP, DOWN buttons in sequence to display: OPTIONS: Enter Key Code OPTIONS: XXXX Enter Key Code Menu Tips Right button scrolls to right, from top to bottom row, and allows editing when ">" symbol is shown. In CALIBRATE or OPTIONS menus, the transmitter will continue to measure and control outputs. When > is pressed, the input value is held at the last measured process value. When sensor is not connected, unit will display CHECK SENSOR and any output controlled by sensor will be at.6 ma or OFF. Example To change date, first enter CALIBRATE menu (Press button for seconds; Press UP, UP, UP, DOWN buttons in sequence) Once in CALIBRATE menu, press UP button time.. Display shows right arrow. Press RIGHT button to display "0" blinking. Press buttons to scroll through numbers.. Press button to save 5. Display now reads new date LAST CAL: 0099 > LAST CAL: 0099 LAST CAL: 08099 SAVING LAST CAL: 08099 GF SIGNET GF SIGNET GF SIGNET GF SIGNET GF SIGNET Menu Functions View Menu Range Calibrate Menu Range Preset Options Menu Range Preset Cond. unit sensor Cell Constant Standard Standard Contrast: 5 Temperature based Standard > Custom Level > Loop Output: 0 ma Cell: Standard 0.0 Cond Decimal *.**** to ****.* ma > 0. ****.* *****. Last Cal: 000000 to Averaging: Off Off Date 9999 0 Off > Low (secs) 0 High(8secs) Cell: Custom 0.0000 to.0000 Loop Adjust:.8 to.00.0000 > 999999.00 ma > 5.0 ma ma Cond Units: us us/cm Loop Adjust: 9.0 to 0.00 us > ms 0.00 ma >.0 ma ma PPM* Temp Display: C C KΩ C > F MΩ Temperature 0.00 to.00% If PPM selected Comp %:.00 > 0.00% PPM Factor: 0.00 to.00.00 Test Loop: 0 ma N/A.00 > *(TDS ppmf) > Test Relay: On or N/A Set: ± 0 C N/A > Off Temperature > Test Relay: On or N/A Set: 0.0000 to N/A > Off Conductivity > 999999 Loop Source: Cond Cond Cond > Temp Loop Range: us 0.0000 to 0.00 to 00 us/cm 0.00 > 00.00 > 999999 (ma) (0 ma) Relay Source: Cond Cond (Relay) Cond > Temp. Temp (Relay) Relay Mode: Off Low (Relay) Low > Low Hi (Relay) Hi Pulse Low or High Selected Relay Setpnt: 0.0000 to 0 us (Relay) Settings repeat for Relay 0 us > 999999 5 C (Relay) Relay Hys: 0.0000 to 0.5 us (Relay) 0.50 us > 999999 0.5 C (Relay) Pulse Selected Relay Rng: us 0.0000 to 00 us (Relay) 0.00 > 0.00 > 999999 580 C (Relay) (Start>Endpoint) Relay PlsRate: 000 0.00 0 pulses/min > pulses/min pulses/min Last Cal: 000000 to 0099 0099 > 9999 page of 8 GF SIGNET 8850 Conductivity/Resistivity Transmitter Instructions
Calibration Procedure. Requirements Electronic calibration is performed to exacting standards by GF SIGNET. System calibration will reduce errors which may be caused by sensor wire lengths longer than the standard 5 ft. length. Wire lengths of 00 feet are acceptable; cable shield must be maintained through cable splice. Calibration may be done by known solution value (A), or by resistance simulation (B). A) Calibration with NIST Traceable Solutions: When using NIST traceable standards, ensure the sensor and test solution are at the solution temperature specified on the test solution label. Prevent contamination of the calibration solution. Thoroughly rinse the sensor in a small amount of test solution before placing in any test solution for calibration purposes. B) Optional Verification with Precision Resistors: The use of precision resistors (±0.%) connected to the rear "Temp In", "Signal IN", and "Iso Gnd" terminals in place of the GF SIGNET sensor, yields quick and accurate electronic instrument calibration. Calibration is completed as follows: ) Select a standard cell constant based on desired range of operation. ) Place a 096 Ω (5 C) resistor between "Temp IN" and "Iso. Gnd" terminals as shown. Note: Temperature simulation errors can adversely effect calibration:.85 Ω = C. ) Calculate the required simulation resistor that represents a value within the selected cell range. The formula for determining the required simulation resistance is: 9 8 7 Iso. Gnd (BLACK) Temp. IN (WHITE) Signal IN (RED) TC resistor Simulation resistor Resistance = Sensor Cell : e.g. 0. Cell = 5,000 Ω or 5 KΩ Desired conductivity (Siemens*) 0.00000 (Siemens*) Conductivity = Sensor cell : e.g. 0. Cell = 0.00000 Siemens* Simulation resistance (Ω) 00,000 (Ω) or µs/cm (*Conversion: µs = X 0 6 Siemens or 0.00000 Siemens) ) Place the calculated simulation resistance between the "Signal IN" and "Iso Gnd" terminals as shown. 5) Set temperature and set conductivity. (Optional: enter zero to reset factory calibration (zero must be reentered if currently displayed to reset factory calibration.). Temperature Coefficient Conductivity measurement is highly dependent on temperature. Temperature dependence is expressed as the relative change per C, commonly known as percent/ C change from 5 C, or slope of the solution. Slopes can very significantly depending on process solution type. The factory default temperature compensation factor is.00%/ C. Process solutions may require adjustment for maximum accuracy. To determine the optimum temperature compensation factor for a process:. Disable the 8850 temperature comp % factor by entering 0.00. Heat the sample solution close to the maximum process temperature. Place sensor in the sample solution allowing several minutes for stabilization. Access the VIEW menu and record the displayed temperature and conductivity values in the spaces provided: Displayed temperature: T = C Displayed conductivity: C = C (Do not use this procedure for solutions from 0.055 µs to 0. µs (0 MΩ to 8 MΩ). An internal pure water curve is used for these ranges. The factory default setting of.00%/ C should be used.). 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: T = C Displayed conductivity: C = C (A 0% change in conductivity between steps and is recommended.). Substitute recorded readings (steps and ) into the following formula: TC Slope = 00 x (C C) (C x (T 5)) (C x (T 5)) Example: A sample solution has a conductivity of 05 µs @ 8 C. After cooling the solution, the conductivity was measured at 50 µs @ C. (C = 05, T = 8, C = 50, T = ) The TC is calculated as follows: TC Slope = 00 x (05 50) = 5500 =.%/ C (50 x (8 5)) (05 x ( 5)) 860 GF SIGNET 8850 Conductivity/Resistivity Transmitter Instructions page 5 of 8
. Parts Per Million (PPM) Factor This feature is only applicable when PPM display units are selected. The programmable PPM Factor is adjustable from 0.0 to 9.99 (factory default =.00). Determine the best PPM Factor for a process solution by calculating the solution's conductivity (µs) and the percent of total dissolved solids (PPM). PPM Factor = TDS (PPM) = Solution conductivity (µs) Total dissolved solids (PPM) Solution conductivity (µs) PPM Factor Example: Solution conductivity = 00 µs TDS = 00 PPM (mg/l) PPM Factor = 00 µs =.00 00 PPM Troubleshooting Display Check Sensor? Value Must be less than 8. Value must be 0.059 or more Value must be 00 or less SETUP READ ERROR Press Any Key Problem No sensor detected. Note: You may enter the CALIBRATION and OPTIONS menu to program setpoint values even though Check Sensor? is displayed. Applies to Mohm display only. Setpoint value entered is not achievable Applies to us/cm display only. Setpoint value entered is not achievable Setpoint value greater than 00. Memory fault occurred. Solution Connect sensor. Reduce setpoint value. Set Temp Coefficient to 0.00. Increase setpoint value. Set Temp Coefficient to 0.00 Use a pulse rate value less than 00 Press any key to reload presets, then reprogram setpoints. page 6 of 8 GF SIGNET 8850 Conductivity/Resistivity Transmitter Instructions
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GF SIGNET Signet Scientific Company, 0 Aerojet Avenue, El Monte, CA 9788 U.S.A. Tel. (66) 57770 Fax (66) 57057 For Worldwide Sales and Service, visit our website: gfsignet.com Or call (in the U.S.): (800) 85090 GEORGE FISCHER GF Piping Systems 8850.090/(A9/99) English Scientific Company 999 Printed in U.S.A. on Recycled Paper page 8 of 8 GF SIGNET 8850 Conductivity/Resistivity Transmitter Instructions