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Hach AF7000 Basic User Manual

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DOC023.97.80281
AF7000 SCM
09/2014, Edition 4
Basic User Manual

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Summary of Contents for Hach AF7000

  • Page 1 DOC023.97.80281 AF7000 SCM 09/2014, Edition 4 Basic User Manual...

  • Page 3: Table Of Contents

    Table of Contents Specifications on page 3 Startup on page 15 General information on page 4 Operation on page 15 Installation on page 7 Maintenance on page 16 User interface on page 13 Additional information Additional information is available on the manufacturer's website. Specifications Specifications are subject to change without notice.

  • Page 4: General Information

    Automatic flush specifications Specification Details Water connection ½-in. BSP Water pressure 10 bar (145 psi) maximum; 1–5 bar (14.5–72.5 psi) recommended Auto flush options Interval: 1 minute to 48 hours Duration: 1 second to 4 minutes Reading hold: 0 seconds to 4 minutes General information In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential damages resulting from any defect or omission in this manual.
  • Page 5 This is the safety alert symbol. Obey all safety messages that follow this symbol to avoid potential injury. If on the instrument, refer to the instruction manual for operation or safety information. This symbol indicates that a risk of electrical shock and/or electrocution exists. This symbol indicates that the marked item can be hot and should not be touched without care.
  • Page 6 Cet appareil numérique de classe A répond à toutes les exigences de la réglementation canadienne sur les équipements provoquant des interférences. FCC Part 15, Class "A" Limits Supporting test records reside with the manufacturer. The device complies with Part 15 of the FCC Rules.

  • Page 7: Installation

    Figure 1 Instrument overview 1 Wiring access cover 6 Sample chamber 11 Grit filter 2 Cable access cover 7 Sample outlet 12 Manual isolation valve for inlet 3 Head height indicator pipe 8 Sensor 13 Motor 4 Directional valve 9 Clean water in (for optional 14 Reset switch for motor flush) 5 Overflow port (2x)
  • Page 8 Installation guidelines This instrument is rated for an altitude of 2000 m (6562 ft) maximum. Use of this instrument at an altitude higher than 2000 m can slightly increase the potential for the insulation to breakdown, which can result in an electric shock hazard. The manufacturer recommends that users with concerns contact technical support.
  • Page 9 Figure 2 Installation dimensions Plumb the instrument N O T I C E Supply ½-in. NPT plumbing for both the sample inlet and the sample outlet. Outlet fittings smaller in diameter than ½-in. NPT can cause unwanted back pressure into the instrument and result in instrument damage. Plumb the sample to the instrument as shown in Figure 1 on page 7.
  • Page 10 • Use ½-in. or larger NPT fittings for the outlet piping. • If the water connections are user-supplied, install an elbow after the sensor to keep a 25–133 mm (1–5.25 in.) head of water above the sensor (in the head height indicator pipe). Refer to Figure 1 on page 7.
  • Page 11 Figure 3 Optional connections 1 Modbus (RS485) card or alarm relay card (optional) 4 Autoflush card (optional) 2 4–20 mA PID controller card or alarm relay card 5 High voltage barrier (optional) 3 4–20 mA Process Output controller card or digital input card (optional) Connect to devices W A R N I N G...
  • Page 12 W A R N I N G Fire hazard. Relay loads must be resistive. Always limit current to the relays with an external fuse or breaker. Obey the relay ratings in the Specifications section. Refer to the illustrated steps in this section to connect the instrument to external devices or to a communications network.
  • Page 13 User interface Figure 4 shows the instrument keypad and display. Table 3 gives the display and keypad descriptions. English 13...
  • Page 14 Figure 4 Display and keypad overview 1 Top display 4 UP arrow key 7 Set Zero key 2 Bottom display 5 Enter key 8 Auto/Manual key 3 DOWN arrow key 6 Menu/Cancel key Table 3 Display and keypad descriptions Item Name Description Top display Raw streaming current value (the same value shown in the bottom display) until the...

  • Page 15: Startup

    Table 3 Display and keypad descriptions (continued) Item Name Description Menu/Cancel key Show the menu options or exit the menu options. Push the DOWN arrow to scroll through the menu options. Set Zero key Set the zero point. The top display changes to "0". To set the zero point, push and hold Set Zero for 3 seconds.

  • Page 16: Maintenance

    Adjust the zero point The zero point can be changed to increase or decrease the coagulant dosage. Increase the zero point setting to decrease the coagulant dose. Decrease the zero point setting to increase the coagulant dose. 1. Put the controller in manual mode. 2.
  • Page 17 Clean the sensor N O T I C E Do not use abrasive cleaners. Always use gloves to handle the piston or the sensor. Oil from hands will increase the stabilization time. Pre-requisites: 1. Put the controller in manual mode. 2.
  • Page 18 Post-requisites: 1. Apply power to the instrument. 2. Let the reading become stable. 3. Set the zero point. Examine the replaceable parts Worn parts can cause poor sensitivity and frequent drifts in the zero point. To examine the parts, refer to Clean the sensor on page 17 and the illustrated steps that follow.
  • Page 19 Replace the fuses D A N G E R Fire hazard. Use the same type and current rating to replace fuses. The instrument has fuses in two locations. Figure 5 shows the location of the 5 A fuses. Figure 6 shows the location of the 8 A fuses.
  • Page 20 Figure 6 Fuse location, 8 A 20 English...
  • Page 22 Tel. +49 (0) 2 11 52 88-320 SWITZERLAND Fax (970) 669-2932 Fax +49 (0) 2 11 52 88-210 Tel. +41 22 594 6400 orders@hach.com info@hach-lange.de Fax +41 22 594 6499 www.hach.com www.hach-lange.de © Hach Company/Hach Lange GmbH, 2012-2014. All rights reserved. Printed in New Zealand.