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Sigma 980 Operating And Maintenance Manual

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Cat. No. 97000-18
Model 980 Flow Meter
Operating and Maintenance Manual
December 2002, Ed. 4

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  • Page 1 Cat. No. 97000-18 Model 980 Flow Meter Operating and Maintenance Manual December 2002, Ed. 4...
  • Page 3 Cat. No. 97000-18 Model 980 Flow Meter Operating and Maintenance Manual © American Sigma, 2002. All rights reserved. Printed in the U.S.A. eac/dp 12/02 4ed...
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  • Page 5: Table Of Contents

    2.4 Wiring Safety Information..........................31 Electrostatic Discharge (ESD) Considerations ....................31 2.5 Wiring the Controller ............................31 2.5.1 Connecting ac Power to the 980 Flow Meter ..................32 2.6 Wiring Optional Devices............................ 34 2.7 Wiring the 4–20 mA Output..........................35 2.8 Wiring the Analog Input.............................
  • Page 6 Table of Contents OPERATION ................................. 57 Section 3 Basic Programming Setup ......................59 3.1 Initial Power-Up of Meter........................... 59 3.2 Basic Programming............................59 Step 1 - Setup..............................59 Step 2 - Flow Units ............................60 Step 3 - Level Units ............................61 Step 4 - Primary Device............................
  • Page 7 Table of Contents 4.10.4.2 Sensor Height ........................... 85 4.10.4.3 Setting the Invisible Range ....................... 86 4.11 In-Pipe Ultrasonic Sensor ..........................87 4.11.1 Mounting the In-Pipe Sensor ......................... 87 4.11.2 Beam Angle ............................88 4.11.3 Programming the In-Pipe Ultrasonic Sensor ..................88 4.11.4 Calibrating the In-Pipe Ultrasonic Sensor....................
  • Page 8 Port Expanders and Protocol Converters ....................... 140 Other Reference Material ..........................140 Troubleshooting Tips ............................140 980 SCADA-Modbus “No Response” Troubleshooting Flow Chart (1 of 5) ........... 143 980 SCADA-Modbus “No Response” Troubleshooting Flow Chart (2 of 5) ........... 144 Page 6 Table of Contents 970ESTOC.fm...
  • Page 9 980 SCADA-Modbus “No-Response” Troubleshooting Flow Chart (3 of 5) ........... 145 980 SCADA-Modbus “No-Response” Troubleshooting Flow Chart (4 of 5) ........... 146 980 SCADA-Modbus “No Response” Troubleshooting Flow Chart (5 of 5) ........... 147 Appendix F 980 Quick-Start Guides ........................149 Main Program Flow Chart..........................

  • Page 10: Safety Precautions

    Safety Precautions Please read this entire manual before unpacking, setting up, or operating this instrument. Pay particular attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment. To ensure the protection provided by this equipment is not impaired, do not use or install this equipment in any manner other than that which is specified in this manual.
  • Page 11 This symbol, when noted on the product, identifies the location of the connection for Protective Earth (ground). Confined Space Entry Important Note: The following information is provided to guide users of 980 Flow Meters on the dangers and risks associated with entry into confined spaces. DANGER Pour éviter les accidents mortels dans les espaces confinés, il faut...
  • Page 12 Before entering any confined space check with your employer for procedures related to confined space entry. Hazardous Locations The 980 Flow Meter is not approved for use in hazardous locations as defined in the National Electrical Code. Page 10 Safety Precautions...
  • Page 13 Safety Precautions DANGER Bien que certains produits Sigma soient conçus et certifiés pour être installés dans des endroits dangereux tels que définis par le National DANGER Electric Code, de nombreux produits Sigma ne conviennent pas pour de Although some Sigma tels endroits.

  • Page 14: Specifications

    Specifications 980 Flow Meter Specifications are subject to change without notice. General Dimensions 14.62" H x 11.88" W x 8.26" D Weight 7.62 kg (16.80 lb) Enclosure NEMA 4X, IP 66 with front cover closed, UV resistant Mounting Wall mount and Rail/Pole mount Graphics Display: Back-lit liquid crystal display (LCD).
  • Page 15 Specifications Integral pH Meter Field selectable to log pH independent of flow or in conjunction with flow; also controls Control/Logging sample collection in response to value of low/high stipends Temperature compensated; impact resistant ABS plastic body pH Sensor Combination electrode with porous Teflon junction. Measurement Range 2 to 12 pH Operating Temperature...
  • Page 16 Specifications Ultrasonic Transducer Operating Frequency 75 kHz Beam Angle ±12° (-10 dB) Accuracy* ±0.03 ft over 2-ft change in head, @ 20 °C, still air, ideal target, 50 ft cable 11.5 in. (minimum) to 10.7 ft (maximum), with ideal target @ 20° C, in still air with Range 50-ft cable.
  • Page 17 Specifications Velocity Transducer Method Doppler Principle Accuracy* ±2% of reading; Zero Stability: ±1.52 cms (±0.05 fps) Range -1.52 to 6.1 m (-5 to +20 fps) Resolution 0.3 cms (0.01 fps) Response Time 4.8 seconds Profile Time 4.8 seconds Length: 6.9 cm (2.7 in.) Probe Dimensions Width: 3.81 cm (1.5 in.) Height: 1.1 cm (0.44 in.)
  • Page 18 Specifications Submerged Area Velocity Probe Method Doppler Principle / Pressure Transducer Material Polyurethane body, 316 series stainless steel diaphragm Cable Urethane sensor cable with air vent, shielded Cable Length 7.6 m (25 ft) standard, custom cable up to 100 ft Length: 12.7 cm (5 inches) Probe Dimensions Width: 3.81 cm (1.5 inches)

  • Page 19: Section 1 Introduction

    The 980 Flow Meter has eight wiring holes located along the bottom of the case. The one 1.38 in. and the seven 0.875 in. conduit holes provide easy access for all power, sensor, control, and communications wiring.

  • Page 20: Front Panel Features And Controls

    1.2 Front Panel Features and Controls The 980 Flow Meter front panel features the keypad and the liquid crystal display (LCD). The side of the 980 Flow Meter provides a connection for an RS232 serial interface temporary connection. The clear front cover of the instrument protects the control panel and display window while providing a clear view of the flow meter status on the display.

  • Page 21: Keypad Description

    Runs (or resumes) a program. Stops a currently running program. 1.4 Liquid Crystal Display The 980 Flow Meter liquid crystal display (LCD) works in conjunction with the four soft keys. When a soft key changes function, the display shows the new function.

  • Page 22: Principle Operation

    1.5 Principle Operation Measurement Capabilities The 980 Flow Meter is often used to measure flow in conjunction with a primary measuring device (flume, weir, pipe, etc.) that has a known level-to-flow relationship. The 980 Flow Meter directly measures the level of liquid in a channel that is contributing to flow (referred to as “head”) and...
  • Page 23 Section 1 ® Using our InSight Gold data analysis software, users can download, remotely program, view real-time current status of logged parameters, and conduct other data manipulation via RS232 connection or the optional modem. To protect the meter’s functionality and data, an operator may set up password security access to the meter using the front-panel keypad.
  • Page 24 Visit www.americansigma.com...

  • Page 25: Installation

    INSTALLATION DANGER Some of the following manual sections contain information in the form of warnings, cautions and notes that require special attention. Read and follow these instructions carefully to avoid personal injury and damage to the instrument. Only personnel qualified to do so, should conduct the installation/maintenance tasks described in this portion of the manual.
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  • Page 27: Customer-Supplied Equipment

    110–230 V single phase switched power 2.2 Unpacking the Instrument Remove the 980 Flow Meter from its shipping carton and inspect it for any damage. If the shipment arrives damaged or incomplete contact: Technical support at 1-800-635-1230 or send e-mail to techhelp@hach.com.
  • Page 28 Section 2 Figure 4 Sealing-type Strain Reliefs, Conduit Fittings, and Sealing Plugs Sealing-type Strain Relief (Cat. No. 8773 0.20-0.35″ O.D. cable, Cat. No. 8786 0.23-0.47″ O.D. cable) Conduit Fitting (½″ (Cat. No. 16483), 1” (Cat. No. 4913600)) Oil-tight Sealing Plug (Cat. No. 42210-00) Figure 5 Mounting Dimensions (1 of 3) 11.88 inches (301.7 mm)

  • Page 29: Mounting Options

    8.00 inches (203.2 mm) 10.00 inches (254 mm) 11.88 inches (301.7 mm) 2.3 Mounting Options The 980 Flow Meter is designed for wall or rail/pole mounting. Wall mounting dimensions and hole patterns are found in Figure 7. For optimal viewing of the the front panel display, mount the instrument facing north to eliminate glare from the sun.

  • Page 30: Wall Mounting

    Mount the 980 Flow Meter using the Wall Mounting Blocks that come installed on the unit, see Figure 7. These brackets provide secure mounting for the instrument. To wall mount the 980 Flow Meter use four ¼–20 screws. Refer to Figure Page 28 Mounting Options...

  • Page 31: Rail/Pole Mounting

    Wall Mounting ¼–20 screws (4) 2.3.2 Rail/Pole Mounting Mount the 980 Flow Meter using the rail/pole mounting kit (Cat. No. 97091-00). 1. Determine if the brackets need to be placed horizontally or vertically, depending on the direction of the rail/pole. Refer to Figure 2.
  • Page 32 Section 2 Figure 9 Rail / Pole Mounting For mounting on a vertical pipe or rail. For mounting on a horizontal pipe or rail. Page 30 Mounting Options...

  • Page 33: Wiring Safety Information

    Wiring the Controller The 980 Flow Meter is divided into two sections by a voltage isolation barrier. The left side of the barrier contains the high voltage wiring and the right side of the barrier contains the low voltage wiring.

  • Page 34: Connecting Ac Power To The 980 Flow Meter

    Batteries (3 AA-size) Low voltage wiring 2.5.1 Connecting ac Power to the 980 Flow Meter DANGER Si du courant à haute tension doit être appliqué aux débitmètre, il est nécessaire de prévoir un moyen de débrancher l'alimentation électrique externe du débitmètre au cours de la maintenance.
  • Page 35 In hard-wired electrical applications the power and safety ground service drops for the 980 Flow Meter should be no longer than 6 meters (20 feet) unless metal conduit is used to shield the ac power wiring. In applications where power cords are allowed by local electrical codes...

  • Page 36: Wiring Optional Devices

    Section 2 Figure 11 Proper Wire Connection Ground Stud Seat insulation against connector. 18–12 gauge wire Strip wire ¼ inch Figure 12 Connecting Power to the Instrument TB11 TB11 SHEILD SHEILD MODEM MODEM TB 9 ANALOG TB 9 ANALOG RCV– RCV–...

  • Page 37: Wiring The 4-20 Ma Output

    6. When wiring the cable sheild, connect to protective earth (ground) at the Note: Use NEMA-approved conduit 980 Flow Meter. Do not connect the cable shield at the remote end of the hubs (Cat. No. 16483) to ensure cable. Cut the cable jacket far enough back to expose the conductors.

  • Page 38: Wiring The Analog Input

    SAMPLER No Connection POWER Wiring the Analog Input 1. Disconnect all power to the 980 Flow Meter. Refer to Wiring Safety Information on page Note: Use NEMA-approved conduit 2. Use a large flat-blade screwdriver to loosen the two screws securing the hubs (Cat.
  • Page 39 6. When wiring the cable sheild, connect to protective earth (ground) at the 980 Flow Meter. Do not connect the cable shield at the remote end of the cable. Cut the cable jacket far enough back to expose the conductors.

  • Page 40: Wiring The Mechanical Totalizer

    ANALOG ANALOG POWER Wiring the Mechanical Totalizer 1. Disconnect all power to the 980 Flow Meter. Refer to Wiring Safety Information on page Note: Use NEMA-approved conduit 2. Use a large flat-blade screwdriver to loosen the two screws securing the hubs (Cat.

  • Page 41: Wiring The Alarm Relays

    Section 2 Figure 15 Locating TB7 for Mechanical Totalizer Connection TB11 TB11 SHEILD SHEILD RCV– RCV– MODEM MODEM RAIN RAIN TB 9 ANALOG TB 9 ANALOG TB10 TB10 4-20 mA 4-20 mA RING RING CH 4 CH 4 CH A+ CH A+ SHIELD SHIELD...
  • Page 42 2 normally open 4 1. With the power disconnected to the controller, use a large flat-blade screwdriver to loosen the two screws securing the 980 Flow Meter cover. Refer to Wiring Safety Information on page 2. Open the cover.

  • Page 43: Wiring The Rain Gauge

    Wiring the Rain Gauge An external “tipping bucket” rain gauge (such as Cat. No. 9708400) can be connected to the rain gauge connector of the 980 Flow Meter. The rain gauge provides a dry contact closure to the flow meter.

  • Page 44: Wiring The Sampler

    Strain Relief Input from Rain Gauge 2.12 Wiring the Sampler 1. Disconnect all power to the 980 Flow Meter. See Wiring Safety Information on page 2. Use a large flat-blade screwdriver to loosen the two screws securing the 980 Flow Meter cover. Open the cover.
  • Page 45 Section 2 Figure 18 Locating TB10 for Sampler Connections TB11 TB11 SHEILD SHEILD RCV– RCV– MODEM MODEM RAIN RAIN TB 9 ANALOG TB 9 ANALOG TB10 TB10 4-20 mA 4-20 mA RING RING CH 4 CH 4 CH A+ CH A+ RCV+ RCV+ SHIELD...

  • Page 46: Wiring The Rs232

    PC and 980 Flow Meter using a serial interface cable Note: Do not connect the RS232 (Cat. No. 1727) or a DTU-II. The 980 Flow Meter also allows for a permanent port to more than one external connection that is routed by an external communications cable to the device at the same time.
  • Page 47 Section 2 2. Disconnect the RS232 permanent conduit connection. 3. Connect RS232 side connector Quick-connect to the hub on the side panel of the instrument. 4. Wire the RS232 side-connector. Refer to Table 10 Figure Table 10 Side Connector RS232 Terminal Block Connections (TB11) Signal Description Wire Color +12 V...

  • Page 48: Wiring The Modem Interface

    Load Numbers of all the devices does not exceed 100. 1. Disconnect all power to the 980 Flow Meter. See warning in Wiring Safety Information on page 2.

  • Page 49: Wiring The Ph Sensor

    2.15 Wiring the pH Sensor The pre-amp junction box (Cat. No. 9708300) is used to connect the pH probe to the 980 Flow Meter. The pH probe wires attach to a terminal strip in the junction box. 2.15.1 pH Junction Box to Instrument...
  • Page 50 4. Route the cable (Cat. No. 9708800) from the pH junction box through a NEMA-rated compression fitting (Cat. No. 16483) or conduit to one of the ½ in. openings on the bottom of the 980 Flow Meter. 5. Connect the wires to the proper screw terminal blocks (TB3). Refer to...

  • Page 51: Ph Probe To Junction Box

    Probe Cable (NEMA-approved strain relief) 2.16 Wiring the Downlook Ultrasonic Sensor 1. Disconnect all power to the 980. Refer to Wiring Safety Information on page Note: To ensure protection against 2. Use a large flat-blade screwdriver to loosen the two screws securing the electrical shock reinstall cover over 980 cover.
  • Page 52 Section 2 6. To ensure protection against electrical shock reinstall the protective cover over the Ultrasonic + and - terminal connections. Table 13 Ultrasonic Terminal Block Connections (TB5) Signal Description Wire Type Wire Color Ult + (pos) Coax Inner Conductor yellow Ult - (neg) Coax Outer Conductor...

  • Page 53: Wiring The In-Pipe Ultrasonic Sensor

    Section 2 2.17 Wiring the In-Pipe Ultrasonic Sensor The in-pipe ultrasonic sensor is wired to the 980 Flow Meter the same way as the ultrasonic downlook. Refer to section 2.16 Wiring the Downlook Ultrasonic Sensor on page 49 Only install an ultrasonic downlook or an in-pipe ultrasonic sensor to the instrument, they cannot be connected at the same time.

  • Page 54: Velocity-Only Sensor Cable Quick-Connect

    Section 2 4. Connect the bare leads to the proper screw terminal block (TB11) as shown in Table Note: The velocity-only probe and Table 15 Velocity-Only Sensor Terminal Block Connections (TB11) the submerged AV probe cannot be connected at the same time. Factory Wire Trimmed Cable Disconnect all bare lead...

  • Page 55: Wiring The Submerged Area Velocity Sensor

    Connect the bare leads to the flow meter using a junction box (Cat. No. 9702500). This junction box is a physical connection point for the sensor wires and breather tubing. 1. Disconnect all power to the 980 Flow Meter. Refer to Wiring Safety Information on page 2.
  • Page 56 Section 2 Table 16 Submerged Area Velocity Sensor Terminal Board Connections (TB11) Signal Description Wire Color Depth + (pos) white Depth - (neg) black + 12 V dc common green XMIT + (pos) gray XMIT - (neg) violet RCV + (pos) orange RCV - (neg) yellow...

  • Page 57: Submerged Area Velocity Sensor Cable Quick-Connect

    Section 2 Figure 27 Junction Box, Probe, Cable Connection, and Desiccant Canister 2.19.2 Submerged Area Velocity Sensor Cable Quick-Connect The quick-connect hub allows easy installation and removal of the submerged area velocity sensor. Connect the submerged area velocity sensor cable to the quick-connect hub: 1.
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  • Page 59: Operation

    OPERATION DANGER Handling chemical samples, standards, and reagents can be dangerous. Review the necessary Material Safety Data Sheets and become familiar with all safety procedures before handling any chemicals. DANGER La manipulation des échantillons chimiques, étalons et réactifs peut être dangereuse. Lire les Fiches de Données de Sécurité...
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  • Page 61: Section 3 Basic Programming Setup

    • Sampler Pacing • Velocity Cutoff/Velocity Default Step 1 - Setup 1-A. Press the soft key from the Main Menu to prepare the 980 Flow SETUP Meter for use. 1-B. Press the soft key and press the soft key to...

  • Page 62: Step 2 - Flow Units

    Section 3 11:00 AM 21 - APR - 01 * Main Menu* DISPLAY DATA SETUP OPTIONS STATUS READY TO START 11:00 AM 21 - APR - 01 * Main Menu* MODIFY LOGIN ALL ITEMS REVIEW ALL MODIFY ITEMS SELECTED ITEMS READY TO START Step 2 - Flow Units 2-A.

  • Page 63: Step 3 - Level Units

    Section 3 Step 3 - Level Units 3-A. From the Modify All Items screen, highlight Level Units, using the up and down arrow soft keys and press the soft key to continue. SELECT 3-B. Select the units of measure to use when displaying level readings (Table 18).
  • Page 64 Section 3 Table 19 Primary Device Choices (continued) Primary Device Description Head vs. Flow Two independent user–entered look up tables of up to 100 points each (See Table Manning Equation Rectangular channel, U-shaped channel, or Circular pipe (See Table Area Velocity Circular pipe, U-shaped channel, Trapezoidal channel, Rectangular channel (See Table Table 20 Weir Choices...

  • Page 65: Step 5 - Program Lock

    Section 3 Step 5 - Program Lock Program Lock provides a protective passcode to keep unauthorized personnel from tampering with the keyboard. When enabled and a user attempts to change the program, a screen will ask them to enter a password. The Program Lock password is set at the factory as 9800 and cannot be changed.

  • Page 66: Step 8 - Total Flow Units

    Section 3 Step 8 - Total Flow Units 8-A. From the Modify All Items screen, highlight Total Flow Units using the up and down arrow soft keys. Press the soft key to continue. SELECT 8-B. Set the Total Flow Units using the soft key.

  • Page 67: Starting And Stopping Programs

    Section 3 Example 1: Velocity Cutoff = 0.20 fps Velocity Default = 0 fps If the velocity falls below 0.20 fps, the meter will store a value of 0 fps until the velocity increases above 0.20 fps. Example 2: Velocity Cutoff = 0.20 fps Velocity Default = 0.20 fps If the velocity falls below 0.20 fps, the meter will store a value of 0.20 fps until the velocity increases above 0.20 fps.
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  • Page 69: Section 4 External Device Setup

    4.1 4–20 mA Output 4.1.1 Programming the 4–20 mA Output Two 4–20 mA current loop outputs are available for the 980 Flow Meter. These current outputs typically pace other process equipment, such as a wastewater sampler, in proportion to the flow rate.

  • Page 70: Calibrating The 4-20 Ma Output

    Section 4 5. Select an Input Channel (e.g., channel 1, 2, 3, or, flow, etc.) to assign to that output. Press the soft key to cycle through the CHANGE CHOICE channel names. When the desired channel is displayed, press the soft key to pick that channel.
  • Page 71 Section 4 6. Measure the current on the selected output using the multimeter and enter the measured value using the numeric keypad. Press the ACCEPT soft key to proceed. 7. Press any key to set the output to 20.00 mA dc. 8.

  • Page 72: Analog Input

    A dissolved oxygen meter has an analog output signal that will connect to the 980 Flow Meter analog input channel 4. The DO meter puts out an analog signal which ranges from +1 V dc to +3 V dc, which is equivalent to 0 to 500 ppm.

  • Page 73: Mechanical Totalizer

    Section 4 4. Press the soft key to select “Logged,” then press the CHANGE CHOICE soft key. ACCEPT 5. Enter a 1-minute logging interval using the numeric keypad, then press soft key. ACCEPT 6. Press the soft key to cycle through the units of measure CHANGE CHOICE until ppm is displayed.

  • Page 74: Reset (Totalizer)

    Section 4 3. Set the Totalizer Scaling factor using the CHANGE CHOICE soft key. All three totalizers are scaled with one of seven scaling factors: X1, X10, X100, X1000, X10,000, X100,000 or X1,000,000. The selected scaling factor always applies to all totalizers. Press the soft key CHANGE CHOICE to cycle through the available scaling choices.

  • Page 75: Alarm Relays

    4.4.1 Programming the Alarm Relays Alarms can be programmed to activate based on certain conditions (low battery, low memory, etc.). Refer to 980 Alarms Flow Chart on page 152. When an alarm is tripped, an action is initiated (report via modem, dial a pager, or set a relay).

  • Page 76: Set Point Alarms

    Section 4 4.4.1.2 Set Point Alarms Set Point Alarms activate when a user-definable high and/or low set point is reached. 1. Select an action to occur when the alarm is activated. 2. Enable one of the alarm conditions. 3. Set either a High trip point or a Low trip point. 4.

  • Page 77: Sampler

    Section 4 4.6 Sampler 4.6.1 Programming a Sampler Connection 1. From the MAIN MENU, select SETUP>MODIFY SELECTED ITEMS 2. Scroll down and highlight using the up and down arrow SAMPLER PACING soft keys. Press the soft key to continue. SELECT 3.

  • Page 78: Modem Interface

    Section 4 4.8 Modem Interface 4.8.1 Programming the Modem 1. From the Main Menu, select OPTIONS > ADVANCED OPTIONS > COMMUNICATIONS SETUP > MODEM POWER. 2. To enable the modem power, press the key until CHANGE CHOICE “ENABLED” shows up in the center of the display. Press the soft ACCEPT key to continue.

  • Page 79: Ph Sensor

    Section 4 4.9 pH Sensor pH sensor function degrades over time, even under ideal conditions, and therefore require periodic replacement. The pre-amplifier junction box is provided to allow for fast, easy replacement of the pH sensor. For extra strain relief the pH cable that leads to the instrument should pass through the water- tight strain relief adapter.

  • Page 80: Downlook Ultrasonic Sensor

    4.10 Downlook Ultrasonic Sensor Downlook ultrasonic level sensors are available with different beam angles and deadbands. The 980 Flow Meter uses a 75 kHz Downlook Ultrasonic Sensor. See Figure The ultrasonic transducer is mounted over the flow stream at the proper location for head measurement.

  • Page 81: Installing An Ultrasonic Sensor (Downlook) At A Primary Device

    Section 4 4.10.1 Installing an Ultrasonic Sensor (Downlook) at a Primary Device Site selection can greatly enhance system performance. Several important factors should be considered when installing the ultrasonic sensor at any primary device. Refer to Appendix A for more information on primary devices. Note: Do not suspend the sensor by the cable.
  • Page 82 Section 4 Figure 32 Ultrasonic Sensor Beam Angle Measure for D aaaaaaaaaaaaaaaaaaaaaaaaa Measure aaaaaaaaaaaaaaaaaaaaaaaaa for D aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa Measure for D aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaa Zero Flow Point aaaaaaaaaaaaaaaaaaaaaaaaa This drawing is not to scale. Figure 33 Choosing the Appropriate Sensor Height Safe Area Possible False Echo θ...

  • Page 83: Mounting The Ultrasonic Sensor

    Section 4 4.10.1.2 Mounting the Ultrasonic Sensor Several brackets are available for mounting the sensor to a fixed location such as a wall or floor. See Figure 34 Figure 35. For mounting options see Parts and Accessories on page 157. Each bracket utilizes the ¾ in. (1.9 cm) Note: To prevent mechanical NPT connector on the sensor to secure the sensor to the bracket.
  • Page 84 Section 4 Figure 35 Assembling the Mounting Bracket (Cat. No. 2904) 14.75 inches (Cat. No. 3047) Horizontal and vertical sections are fully adjustable*. 15.25 inches (Cat. No. 3046) Sensor Mounting Clamp 16.625 inches (2) (Cat. No 3048) 5.5 inches tall (Cat. No. 3108) * Loosen the bolt, slide the section to the desired distance and re-tighten the bolt.

  • Page 85: Ultrasonic Senor (Downlook) Installation Troubleshooting

    The system is designed with averaging routines to help mitigate this problem. The acoustical impedance of foam and oil is low relative to air. While the 980 is designed with an AGC (Automatic Gain Control) scheme to reduce these factors it is recommended that sites without these anomalies be selected.

  • Page 86: Programming The Downlook Ultrasonic Sensor

    4.10.3 Programming the Downlook Ultrasonic Sensor The downlook ultrasonic sensor does not require specific programming, unless more than one sensor option is connected to the 980 Flow Meter. When more than one sensor option is connected to the 980 Flow Meter: 1.

  • Page 87: Sensor Height

    Section 4 1. From the Main Menu, select OPTIONS>ADVANCED OPTIONS>CALIBRATION>ULTRASONIC SENSOR. Note: Always re-check the 2. Select Calibrate U-Sonic using the up and down arrow soft keys. Press Level Adjust when re-installing the soft key. SELECT flow meter. 3. Select Standard as the type of Ultrasonic Transducer using the CHANGE soft key.

  • Page 88: Setting The Invisible Range

    7. Press the soft key when finished. ACCEPT 4.10.4.3 Setting the Invisible Range The 980 Flow Meter is equipped with an Invisible Range feature (adjustable deadband) to prevent false echoes from tops of channel walls, ladder rungs, shelves, etc. Refer to Figure 36.

  • Page 89: In-Pipe Ultrasonic Sensor

    Section 4 4.11 In-Pipe Ultrasonic Sensor 4.11.1 Mounting the In-Pipe Sensor • Mount the sensor over the center of the flow stream where the surface turbulence is minimized (Figure 37). • Mount the sensor 2 m (82 in.) away from obstructions located in front of the in-pipe senor to prevent inaccurate liquid level readings (Figure 38).

  • Page 90: Beam Angle

    4.11.3 Programming the In-Pipe Ultrasonic Sensor The in-pipe ultrasonic sensor does not require operator programming, unless more than one sensor option is connected to the 980 Flow Meter. When more than one sensor option is connected: 1. From the Main Menu, select OPTIONS >...

  • Page 91: Liquid Depth

    Section 4 2. Highlight Calibration, using the up and down arrow soft keys. Press the soft key to continue. SELECT 3. Highlight Ultra-Sonic Sensor, using the up and down arrow soft keys. Press the soft key to continue. SELECT 4. Highlight Calibrate U-Sonic Sensor and press the soft key.

  • Page 92: Setting The Invisible Range

    Section 4 4.11.4.3 Setting the Invisible Range The 980 Flow Meter is equipped with an invisible range feature to prevent false echoes from tops of channel walls, ladder rungs, shelves, etc. A user- selected range is defined that is invisible to the flow meter. Extend the invisible range to where it meets or overlaps the highest expected level in the channel.

  • Page 93: Programming The Velocity-Only Sensor

    Section 4 Figure 39 Velocity-Only Sensor Velocity Measurement Sound Waves Velocity Sensor 4.12.1 Programming the Velocity-Only Sensor 1. From the , select MAIN MENU SETUP>MODIFY SELECTED ITEMS 2. Highlight Velocity Direction using the up and down arrow soft keys. Press soft key to continue.

  • Page 94: Installing The Velocity-Only Sensor In A Pipe

    Section 4 4.12.3 Installing the Velocity-Only Sensor in a Pipe 4.12.3.1 Important Guidelines for Velocity-Only Sensor Installation • Do not install more than one probe at a time in pipes less than 24 inches in diameter (61 cm). Multiple probes in smaller pipes can create turbulent or accelerated flows near the probes that may cause inaccurate measurements.
  • Page 95 Section 4 Figure 40 Attaching the Sensor Mounting Band Receptacle for Spring Clip Velocity Sensor Nylon Wire Ties Figure 41 Avoiding Silt when Mounting the Sensor Water Silt Pipe Sensor Page 93 Velocity-Only Sensor...

  • Page 96: Compensating For Velocity Direction

    Section 4 4.12.3.4 Compensating for Velocity Direction When programming the velocity sensors you may select one of three Velocity Direction options and the velocity cutoff/velocity default: Direction Description Use this option at sites with fairly consistent velocities, and low to medium turbulence. The flow stream over the sensor should be relatively straight, with no drops or turns near the measurement point.

  • Page 97: Submerged Area Velocity Sensors

    Section 4 Figure 42 Placing the Sensor into the Flow Manhole Manhole Velocity Sensor Velocity Sensor Normal Upstream Position Downstream Position 4.13 Submerged Area Velocity Sensors Submerged Area Velocity sensors can measure level and velocity simultaneously. A submerged pressure transducer measures level. Velocity is measured with sound waves, using the Doppler principle.

  • Page 98: Calibrating The Submerged Area/Velocity Sensor

    Section 4 Setting the Water Level 1. Take a physical measurement of the water level and enter the number using the Level Adjust function on the instrument display. 2. Measure from the surface water to the top of the pipe (B in Figure 44), then subtract this from the pipe diameter (A in...

  • Page 99: Installing A Submerged Area/Velocity Sensor In A Pipe

    Section 4 2. Place the sensor flat on a table top or floor with the sensor (the plate with holes) facing down onto the surface (Figure 45). 3. Press any key. 4. Place the sensor face up in the bucket or liquid. Tap lightly to remove air bubbles.
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  • Page 101: Maintenance

    MAINTENANCE DANGER Some of the following manual sections contain information in the form of warnings, cautions and notes that require special attention. Read and follow these instructions carefully to avoid personal injury and damage to the instrument. Only personnel qualified to do so, should conduct the installation/maintenance tasks described in this portion of the manual.
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  • Page 103: Routine Maintenance

    Section 5 Maintenance This chapter explains how to maintain, repair, and upgrade the 980 Flow Meter. It describes how to open the case, inspect and replace fuses, and perform operating system software upgrades. 5.1 Routine Maintenance Routine maintenance of the 980 Flow Meter consists of calibrating input channels, cleaning the case, and maintaining the sensors as needed.

  • Page 104: Fuse Replacement

    Section 5 Fuse Replacement DANGER L'interrupteur d'alimentation interne ne met pas les fusibles hors tension. Débranchez toutes les sources d'alimentation externes lorsque vous installez un DANGER fusible. Internal power switch does not remove power from the fuses. PELIGRO Remove power from all external El interruptor de energía interno no interrumpe el flujo a los fusibles.

  • Page 105: Memory Batteries

    Section 5 Figure 46 Locating the Fuses (F1 and F2) TB11 TB11 SHEILD SHEILD RCV– RCV– MODEM MODEM RAIN RAIN TB 9 ANALOG TB 9 ANALOG TB10 TB10 4-20 mA 4-20 mA RING RING CH 4 CH 4 CH A+ CH A+ SHIELD SHIELD...

  • Page 106: Cleaning And Maintaining Submerged Area/Velocity Sensors

    Section 5 5.6 Cleaning and Maintaining Submerged Area/Velocity Sensors ATTENTION Lorsque vous manipulez des matériaux, des échantillons et des déchets, portez des lunettes et des gants en latex, pour écarter tout risque d'infection ou de CAUTION: maladie. When handling materials, samples, and waste wear goggles ADVERTENCIA and latex gloves to avoid illness...

  • Page 107: Changing The Desiccant

    Section 5 Figure 47 Removing the Protective Cover 3 4x Gasket Screws (#6–32 x Protective Cover Transducer 5.6.2 Changing the Desiccant Your sensor contains a tube that equalizes the air pressure in the transducer and the outside air pressure. Moisture may become trapped in this tube. A desiccant-filled canister helps remove moisture from this tube and from the sensor.

  • Page 108: Hydrophobic Filter Description

    Section 5 6. Hold the canister up to the light and inspect the hydrophobic filter for tearing or obstruction. Note: Applying O-ring grease • If you see a small, dim light spot while looking through the hole, the (beryllium grease) to new or dry O- filter is in good condition.

  • Page 109: Hydrophobic Filter Replacement Procedure

    Section 5 5.6.5 Hydrophobic Filter Replacement Procedure 1. Using a deep-well hex socket (11 mm), unscrew the hex-head tubing nipple from the top of the canister and discard the old filter. 2. Discard any remnants of Teflon tape from the nipple’s threads. Reapply two turns of Teflon tape (Cat.
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  • Page 111: Appendix A Working With Primary Devices

    Appendix A Working with Primary Devices Working with Primary Devices and Sensor Operation Installing the sensor in any primary device requires familiarity with the proper location for head measurement in that particular primary device. Just as the proper installation of the primary device itself is critical to obtaining optimum flow measurement accuracy, the appropriate location of the submerged or ultrasonic sensor also greatly affects flow measurement accuracy.
  • Page 112 Appendix A Figure 50 Weir Submerged Draw down Head Probe Maximum Measurement Head Height Point Crest FLOW FLOW Minimum Crest Height Weir Plate Submerged Minimum Distance from Probe Weir Plate Page 110 Working with Primary Devices...
  • Page 113 Appendix A Figure 51 Parshall Flume Stilling Well (Optional) Length of Converging Section 2/3A Length to Stilling Well Submerged Probe TOP VIEW FLOW Head Measurement Point Submerged Probe ELEVATION Submerged Flow Free Flow 4X Max H Minimum Distance from Throat Section Page 111 Working with Primary Devices...
  • Page 114 Appendix A Figure 52 Palmer-Bowlus Flume (with Integral Approach) Submerged Probe (Preferred Head Measurement Point) FLOW Top View Lower Throat Upper Transition Transition Preferred Head Measurement Point Water Surface Small jump should occur here. FLOW Elevation View Downstream Depth "D" Conduit Diameter Upstream Depth Page 112...
  • Page 115 Appendix A Figure 53 Leopold-Lagco Flume Submerged Probe (Preferred Head Measurement Point) FLOW Top View Upper Transition Throat Lower Transition Preferred Head Measurement Point Small jump should occur here. Water Surface FLOW Elevation View End View "D" Conduit Diameter Downstream Depth Upstream Depth Page 113 Working with Primary Devices...
  • Page 116 Appendix A Figure 54 H-Flume FLOW Top View Inlet Bulkhead Head Measurement Section FLOW Elevation View Approach Section Pipe Stub Figure 55 Round Pipes Top View FLOW (Q) Elevation View ∆Y ∆X Page 114 Working with Primary Devices...

  • Page 117: Appendix B Troubleshooting Measurement Errors

    Troubleshooting Measurement Errors From Electromagnetic Fields Measurement inaccuracy can be affected by numerous factors, one of these factors is Radio Frequency (RF). The 980 Flow Meter is designed to be resistant to RF fields and other Electromagnetic Interference (EMI), however,...
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  • Page 119: Appendix C Programming Features

    Appendix C Programming Features Review All Items To view programmed entries without accidently changing any of the information, select the Review All Items from the SETUP menu. This information fills more than one screen, scroll through the setup information one page at a time with the arrow keys. Press the MAIN MENU key to exit. 11:00 AM 21 - APR - 01 STATUS SCREEN REVISION:...

  • Page 120: Tabular Or Graph Format

    Appendix C Tabular or Graph Format 1. Highlight the desired display method using the up and down arrow soft keys then press the Select soft key. 11:00 AM 21 - APR - 01 DISPLAY DATA SELECT DISPLAY DATA DISPLAY BY GRAPH RETURN Table 27 Display Data Functions and Descriptions Function...

  • Page 121: Graph Manipulation

    Next Channel Soft Key Graphs data from the next logged channel. For example, if the 980 is logging Level, Flow, and pH and the Level graph is currently displayed, the NEXT CHANNEL soft key causes the Flow channel to be graphed. Pressing Next Channel again will create a graph for pH channel.

  • Page 122: Setting The Time And Date

    Appendix C The Options menu can set the: • Time and Date for the real time clock in the 980 Flow Meter. • Program the advanced features of the flow meter. • Select level sensor when multiple sensors are installed.

  • Page 123: Alarms

    • Languages (English, Czech, Danish, French, German, Italian, Portuguese, and Swedish, Dutch, and Spanish. (The 980 supports English and one other selected language). Alarms Setting the Deadband After entering the trip point, enter a “Deadband” value. The deadband is the area between alarm “turn on”...

  • Page 124: Data Log

    From the Main Menu, select SETUP > ADVANCED OPTIONS > DATA LOG. The 980 Flow Meter can record up to 115,630 readings from any or all input channels and store them in solid state, battery-backed memory for later viewing or retrieval.

  • Page 125: Data Logging Memory Allocation Options

    5-minute intervals. Wrap Memory Mode The 980 Flow Meter uses wrap memory. In Wrap mode, when memory becomes full, the oldest reading is discarded each time a new reading is taken. When memory becomes full, the flow meter continues to operate and log data.

  • Page 126: Diagnostics

    Appendix C 6. Select another channel to configure or press the soft key to back RETURN up one step or press the function key to return to the Main MAIN MENU Menu. Table 30 Setup Parameters for Specific Channels Channel Name Configuration Options Select Logged or Not Logged using the soft key.

  • Page 127: Lcd Test

    Appendix C LCD Test Display Test verifies all the pixels in the Liquid Crystal Display (LCD) are functional. The LCD is made up of 14,400 pixels that are turned on and off as needed to create the display of graphics and text. Each individual pixel is turned on and off by its own transistor.

  • Page 128: Set Point Sampling

    TEMPERATURE Set Point Sampling In the 980 Flow Meter, set point sampling allows the control of an automatic liquid sampler from up to 14 different sources individually or simultaneously. Upon reaching a user-defined set point trigger, the flow meter provides an...
  • Page 129 Appendix C Table 32 shows all possible sampling triggers and appropriate settings. Table 32 Sampling Triggers Sampling Trigger Settings Level High and/or Low condition, deadband Flow High and/or Low condition, deadband Flow Rate of Change High condition within time interval Temperature High and/or Low condition, deadband High and/or Low condition, deadband...

  • Page 130: Storm Water

    Storm Water A special Storm Water monitoring program designed specifically to meet the NPDES storm water requirements is built in to the 980 Flow Meter. Rainfall is monitored with an optional Rain Gauge. A connection is then made from the 980 Flow Meter Sampler Interface to an automatic liquid sampler.

  • Page 131: Appendix D Programming Worksheet

    Appendix D Programming Worksheet Name: Date: Serial No.: ID No.: Program Software Versions for: ® Flow Meter: DTU: InSight Gold InSight Vision StreamLog Basic Programming Guidelines • Go through all items in the Setup menu and configure each one to your requirements.
  • Page 132 Appendix D 6. Enter a SITE IDENTIFICATION:_________________________________ 7. Enter unit of measure for TOTAL FLOW (acre-feet, cubic feet, gallons, liters, cubic meters):__________ Applies to velocity models only: 8. Enter the VELOCITY DIRECTION (Upstream (normal), Downstream or Always Positive):__________ 9. Enter the VELOCITY UNITS (fps or m/s):__________ 10.
  • Page 133 Appendix D 3. Calibrate inputs (as needed): __________chk 4. Communications Setup: (If modem is enabled) ACCEPT any baud rate displayed. [Modem will independently establish actual baud rate between 1200 and 14,400.] Pager Phone Numbers (if enabled): Pager Service:_____________ Pager #1: ___________ Pager #2: ___________ Pager #3: ___________ Select Baud Rate for RS232 (1200, 2400, 4800, 9600, 19200):_________ 5.
  • Page 134 Appendix D Channel Name High Trigger Low Trigger Deadband Time Interval Temperature Rainfall Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Channel 6 Channel 7 8. Configure STORM WATER if desired: Start Condition:__________ (Rain, Level, Rain & Level, Rain or Level) Rain Trigger: _________________, Rain Time Limit:_______________ Level Trigger__________________ Check one:...

  • Page 135: Appendix Escada-Modbus® System Guidelines

    The flow meter and Man Machine Interface (MMI) communicate using a master-slave technique in which only the master can initiate queries to a slave (980). The 980 will always be considered the slave, never a master. The master can address individual 980 Flow Meters or can broadcast a message to instruments within its scope.

  • Page 136: Function Field

    The device address of the 980 Flow Meter is set via the front keypad in the 980 Communications menu. 1. From the Main Menu select OPTIONS >...

  • Page 137: Communication Parameters

    7 bits, Even Parity, and 1 Stop bit. The baud rate may be configured to any value offered by the 980 Flow Meter. With the exception of baud rate, the communication parameters must not vary from this format.
  • Page 138 Appendix E Table 34 Channels’ Read Holding Register Addresses Start Address Start Address Name Type Size (bits) # of Registers Registers Temperature Float 40001-40002 Rainfall Float 40003-40004 pH (or ORP) Float 40005-40006 Level 1 Float 40007-40008 Velocity 1 Float 40009-40010 Channel 1 Float 40011-40012...

  • Page 139: Query

    (03) High Pts. Low High For example, to read the level channel of the 980 Flow Meter, the query must be as indicated in Table The master queries the flow meter using a Read Holding Registers request, which implies a 4XXXX register reference, to slave device address 01.

  • Page 140: Response

    The flow meter response echoes the address and function code, which indicates that no problems exist in the communication between the master and 980. The ‘Byte Count’ field specifies how many 8-bit data items are being returned in the data field. With Modbus ASCII, this is one-half the actual count of ASCII characters transmitted in the data portion of the response.

  • Page 141: Complications With Floating Point Values

    Appendix E Equipment (DTE) must assert and hold high the DTR line of the DB9 connector (DSR of meter). The 980 Flow Meter does not support RTS/CTS hardware handshaking. Note that DTE must be capable of handling a 12- second maximum response lag.

  • Page 142: Port Expanders And Protocol Converters

    In some situations, there may not be a Modbus ASCII port available for use with the 980 Flow Meter. A good example might be where there is a need to install a flow meter at a remote pump site that already has a single Modbus line connected to a PLC that is used to control the pumps.
  • Page 143 Response: Check the number of registers being polled Additionally, the 980 Flow Meter checks all Modbus messages to see if the correct number of registers is requested for the type of data being returned. The meter will ignore the request if the number of registers requested does not coincide with the correct number of registers needed to accurately display the data.
  • Page 144 Response: Check the data format of the Modbus server. When configuring a Modbus server or MMI application to poll a 980 Flow Meter, it is absolutely essential that the correct data format is selected for that particular data channel (register).

  • Page 145: Scada-Modbus "No Response" Troubleshooting Flow Chart (1 Of 5)

    Appendix E 980 SCADA-Modbus “No Response” Troubleshooting Flow Chart (1 of 5) No response to polling Message. Apply power and turn the Is the 980 turned on Meter on by pressing and power applied? the "ON" button. Apply power and turn the...

  • Page 146: Scada-Modbus "No Response" Troubleshooting Flow Chart (2 Of 5)

    Appendix E 980 SCADA-Modbus “No Response” Troubleshooting Flow Chart (2 of 5) Continued from sheet 1. Is the Can the Obtain a protocol converter Master device Master device be to convert the communication configured for 7 data bits, configured for...

  • Page 147: Scada-Modbus "No-Response" Troubleshooting Flow Chart (3 Of 5)

    To ensure the integrity of the data being returned, the 980 checks to make sure the number of registers being requested coincides with the data type being returned. If there are inconsistencies the meter will ignore the polling message.

  • Page 148: Scada-Modbus "No-Response" Troubleshooting Flow Chart (4 Of 5)

    Appendix E 980 SCADA-Modbus “No-Response” Troubleshooting Flow Chart (4 of 5) Continued from sheet 3. Is the Congratulations! 980 responding now? You have fixed it. Use either a protocol analyzer or a communications program Put the RX and TX such as Windows Terminal or...

  • Page 149: Scada-Modbus "No Response" Troubleshooting Flow Chart (5 Of 5)

    Appendix E 980 SCADA-Modbus “No Response” Troubleshooting Flow Chart (5 of 5) Returned values do not match the values in the 980 display. e.g., If polling for flow, are you requesting register 40033? Verify the correct register Are you SURE...
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  • Page 151: Appendix F 980 Quick-Start Guides

    Appendix F 980 Quick-Start Guides Main Program Flow Chart Main Menu Display Data Options Status Setup Sample Time/Date Level: 0.0 in Login History Flow: 0.0 mgd Level Total (x1000): 0 gal Flow Level Sensor pH: 0.0 pH Velocity Flow Units Rainfall: 0.0 in...

  • Page 152: Flow Meter Basic Programming Setup Flow Chart

    Appendix F 980 Flow Meter Basic Programming Setup Flow Chart Main Menu Setup Review All Items Modify All Items Modify Selected Items Login Flow Units Steps through each Displays Program Program Setting Settings for Review (same items as (no changes allowed).

  • Page 153: Flow Meter Advanced Options Flow Chart

    Appendix F 980 Flow Meter Advanced Options Flow Chart Main Menu Options Advanced Options Diagnostics Flow Alarms Calibration Data Log Totalizer Keypad Test Select inputs. Modify Setup See Alarms See Calibration flow chart flow chart Rainfall Select Scaling Display Test...

  • Page 154: Alarms Flow Chart

    Appendix F 980 Alarms Flow Chart Main Menu Options Advanced Options Alarms Memory Battery Level Flow Rate of Change Rainfall Modem Failure Flow U-Sonic Echo Loss pH / mV X-ducer Ringing Temperature Pick one. U-Sonic Failure Channel 1 RS-485 Timed Out...

  • Page 155: Flow Meter Calibration Flow Chart

    Appendix F 980 Flow Meter Calibration Flow Chart Main Menu Options Advanced Options Calibration Submerged 4-20 mA Outputs Ultrasonic Sensor Area Velocity Set invisible range. Output A Place sensor Place on a flat surface and Output B first buffer. press any key.
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  • Page 157: General Information

    GENERAL INFORMATION At American Sigma, customer service is an important part of every product we make. With that in mind, we have compiled the following information for your convenience. Page 155 GENERAL INFORMATION...
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  • Page 159: Parts And Accessories

    Part Number Rail / Pole Mounting ............................9709100 Wall Mounting Bracket ..........................4424700 Sensors and Accessories for Use with the 980 Flow Meter In-Pipe Ultrasonic Sensor Mounting Accessories Mounting Band Set for 15–42” pipes........................3766 Mounting Clip (for use with Cat. No. 3766) ......................3868 Mounting Clip, permanent (screws to channel wall)....................
  • Page 160 Parts and Accessories Mounting Band for 21 in. Pipes ........................9706300 Mounting Band for 24 in. Pipes ........................9706400 Mounting Band for 27 in. Pipes ........................9706500 Mounting Band for 30 in. Pipes ........................9706600 Mounting Band for 33 in. Pipes ........................9706700 Mounting Band for 36 in.

  • Page 161: Ordering And Technical Support

    • Brief description or model number Ordering Outside the U.S.A. American Sigma maintains a worldwide network of dealers and distributors. To locate the representative nearest you, send E-mail to or contact: intl@hach.com. Technical Support in the U.S.A. or Outside Europe Technical and Customer Service Department personnel are eager to answer questions about our products and their use.

  • Page 162: Repair Service

    Repair Service Authorization must be obtained from American Sigma before sending any items for repair. Please contact the American Sigma Service Center serving your location. In the United States or Outside Europe American Sigma P.O. Box 389 Loveland, Colorado, 80539-0389 U.S.A.

  • Page 163: Warranty

    In the event that a defect is discovered during the warranty period, American Sigma agrees that, at its option, it will repair or replace the defective product or refund the purchase price, excluding original shipping and handling charges.

  • Page 164: Certification

    Hach Company certifies this instrument was tested thoroughly, inspected and found to meet its published specifications when it was shipped from the factory. The 980 Flow Meter has been tested and is certified as indicated to the following instrumentation standards:...
  • Page 165 Certification Additional Emissions Standard/s include: EN 55011 (CISPR 11), Class “B” emission limits Canadian Interference-causing Equipment Regulation, IECS-003, Class A Supporting test records by Hewlett Packard, Fort Collins, Colorado Hardware Test Center (A2LA # 0905-01) and certified compliance by Hach Company. This Class A digital apparatus meets all requirements of the Canadian Interference-causing Equipment Regulations.
  • Page 166 The following techniques of reducing the interference problems are applied easily. 1. Disconnect the 980 Flow Meter from its power source to verify that it is or is not the source of the interference.

  • Page 167: Index

    Index Numerics Beam Angle ............ 78 Calibration ............84 4-20 mA Output Invisible Range ..........86 Calibration ............68 Maintenance ..........103 Programming ..........65 Mounting ............81 Wiring ............. 67 Programming ..........84 Troubleshooting ..........115 Wiring ............. 49 Downstream ............
  • Page 168 Index Level Units ............ 61, 117 Run/Stop Key ............65 Liquid Crystal Display ........19, 59 Liquid Depth ............84 Logging Intervals ..........122 Safety Precautions ..........8 Sampler Pacing ............. 63 SCADA-Modbus® System ........133 Maintenance ............101 Sensor Height ............85 Measurement Capabilities ........

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