Precision Digital Corporation PD6820 Instruction Manual
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Precision Digital Corporation PD6820 Instruction Manual

Explosion-proof loop-powered rate/totalizer
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PD6820 Explosion-Proof Loop-Powered Rate/Totalizer
Instruction Manual
• Fully-Approved Explosion-Proof Loop-Powered Rate/Totalizer
• 4-20 mA Input with ±0.03% Accuracy
• 3.0 Volt Drop (6.0 Volt Drop with Backlight)
• Easy Field Scaling in Engineering Units without Applying an Input
• 0.7" (17.8 mm) 5 Digits Upper Display for Rate
• 0.4" (10.2 mm) 7 Alphanumeric Characters Lower Display for Total, Tag, or Units
• Simultaneous 5-Digit Rate and 7-Digit Total Display
• Rate in Units per Second, Minute, Hour, or Day
• Display Open Channel Flow with Programmable Exponent Feature
• Open Collector Pulse or Alarm Output
• Display Mountable at 0°, 90°, 180°, & 270°
• SafeTouch
Through-Glass Button Programming
TM
• HART
Protocol Transparent
®
• Loop or External DC-Powered Backlight Standard
• Operating Temperature Range: -40 to 75°C (-40 to 167°F)
• FM Approved as Explosion-Proof / Dust-Ignition Proof / Flame-Proof
• CSA Certified as Explosion-Proof / Dust-Ignition Proof / Flame-Proof
• ATEX and IECEx Certified as Flame-Proof and Protection by Enclosure
• Conformal Coated PCBs for Dust and Humidity Protection
• Password Protection for Programming Only
• 32-Point Linearization, Square Root Extraction and Programable Exponent Function
• Wide Viewing Angle
• Flanges for Wall or Pipe Mounting
• Explosion-Proof, IP68, NEMA 4X Die-Cast Aluminum Enclosure
• Two 3/4" NPT Threaded Conduit Openings (One Plug Installed)
• 2" U-Bolt Kits Available
• 3-Year Warranty
PRECISION DIGITAL CORPORATION
233 South Street • Hopkinton MA 01748 USA
Tel (800) 343-1001 • Fax (508) 655-8990
www.predig.com

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Summary of Contents for Precision Digital Corporation PD6820

  • Page 1 PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual • Fully-Approved Explosion-Proof Loop-Powered Rate/Totalizer • 4-20 mA Input with ±0.03% Accuracy • 3.0 Volt Drop (6.0 Volt Drop with Backlight) • Easy Field Scaling in Engineering Units without Applying an Input • 0.7" (17.8 mm) 5 Digits Upper Display for Rate •...

  • Page 2: Introduction

    Disclaimer The information contained in this document is subject to change without notice. Precision The ProtEX-RTA PD6820 is a rugged, explosion- Digital Corporation makes no representations proof loop-powered rate/totalizer fully featured for or warranties with respect to the contents hereof;...

  • Page 3: Table Of Contents

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Table of Contents Introduction ......................2 Ordering Information ..................2 Specifications ..................... 5 General ......................5 Input ........................ 5 Rate/Totalizer ....................5 Open Collector Output ................... 6 Product Ratings and Approvals ..............6 Electromagnetic Compatibility ..............6 Safety Information ..................
  • Page 4 PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Operation......................22 Front Panel Buttons Operation ..............22 Maximum & Minimum Readings (MAXIMUM & MINIMUM) ......22 Reset Meter to Factory Defaults..............22 Factory Defaults & User Settings ..............22 Troubleshooting ....................23 Troubleshooting Tips ................... 23 Quick User Interface Reference ..............

  • Page 5: Specifications

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Specifications Weight 5.00 lbs (80 oz, 2.27 kg) Warranty 3 years parts and labor. See Warranty Information and Terms & Conditions on Except where noted all specifications apply to operation at +25°C. General www.predig.com for complete details.

  • Page 6: Open Collector Output

    YYMM format. ment selected (e.g. A pulse scaler value For European Community: The PD6820 must be of 100 will generate one pulse every time the total is incremented by 100 installed in accordance with the ATEX directive units).

  • Page 7: Installation

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Installation Mounting For Installation in USA: The PD6820 must be in- The PD6820 has two slotted mounting flanges that stalled in accordance with the National Electrical may be used for pipe mounting or wall mounting.

  • Page 8: Cover Jam Screw

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Cover Jam Screw • Observe all safety regulations. Electrical wiring The cover jam screw should be properly installed should be performed in accordance with all once the meter has been wired and tested in a safe agency requirements and applicable national, environment.

  • Page 9: Wiring Diagrams

    BACKLIGH T UNLOCK LOCK 9-36 LOOP To avoid damaging the PD6820’s amplifying components, use care not to wire incorrectly or exceed output ratings. A diode, such as 1N4000 Figure 4. Connections without Backlight series, will provide protection from relay transients.

  • Page 10: Setup And Programming

    Use a password to prevent tampering. • After all connections have been completed and The PD6820 is equipped with four sensors that oper- verified, apply power to the loop. ate as through-glass buttons so that it can be pro- grammed and operated without removing the cover (and exposing the electronics) in a hazardous area.

  • Page 11: Buttons And Display

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Buttons and Display Menu Button Press the Menu button to enter or exit the • Programming Mode at any time. Press and hold the Menu button for five seconds • MENU ENTER to access the Advanced features of the meter.

  • Page 12: Main Menu Display Functions & Messages

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Main Menu Display Functions & Messages Display Parameter Action/Setting Enter Setup menu Setup SETUP The meter displays various functions and messages Enter Decimal Point menu DeC. . p t Decimal point during setup, programming, and operation. The table...

  • Page 13: Setting Up The Meter (Setup)

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Setting Up the Meter (SETUP) Setting the Decimal Point (dec. P T) Rate decimal point may be set with up to four decimal The Setup menu is used to select: places or with no decimal point at all. Total decimal...

  • Page 14: Programming The Meter (Prog)

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Programming the Meter (Prog) Scaling the Meter (SCale) The meter may either be scaled (SCALE) without The 4-20 mA input can be scaled to display the applying an input or calibrated (Cal) by applying an process in engineering units.

  • Page 15: Setting The Time Base (T. B Ase)

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Calibrating the Meter (Cal) Minimum Input Span To scale the meter without a signal source The minimum input span is the minimum difference refer to Scaling the Meter (SCale). between input 1 and input 2 signals required to complete the calibration or scaling of the meter.

  • Page 16: Manual Or Automatic Total Reset Function (T Rst)

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Manual or Automatic Total Reset Setting the Tag Display (tag) Function (t rST) The meter can be set to display a combination of sev- en alphanumeric characters for engineering units (e.g. The meter may be programmed to reset the total ei- GALLONS) or for identification (e.g.

  • Page 17: Setting Up The Password (Passwrd)

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Setting Up the Password (PASSWRD) Disabling Password Protection The Password menu is used to program a five-digit To disable the password protection, access the password to prevent unauthorized changes to the Password menu and enter the correct password programmed parameter settings.

  • Page 18: Advanced Features Menu

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Advanced Features Menu Advanced Features Menu & Display Messages To simplify the setup process, functions not needed The following table shows the Advanced features for most applications are located in the Advanced menu functions and messages in the order they features menu.

  • Page 19: Alarm & Pulse Output (Output)

    Instruction Manual Alarm & Pulse Output (OUTPUT) Pulse Output Scaler (count) The PD6820 is equipped with an NPN open collector The pulse output scaler (count) corresponds to the output that may be set up for high or low rate alarm total units (e.g.

  • Page 20: Advanced Function Selection (Functn)

    The square root function can be used to linearize the signal from a differential pressure transmitter and display flow rate in engineering units. PD6820 Displaying Flow Rate by Extracting Square Root from DP Transmitter Signal. Low-Flow Cutoff (CUTOFF) The low-flow cutoff feature allows the meter to be...

  • Page 21: Programmable Exponent Linearization (Prog. E )

    There is no need to recalibrate the meter for milliamps when first received from the factory. The PD6820, in combination with an ultrasonic level The meter is factory calibrated for milliamps prior to transmitter, makes for an economical way to measure shipment.

  • Page 22: Operation

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Operation Reset Meter to Factory Defaults Front Panel Buttons Operation When the parameters have been changed in a way that is difficult to determine what’s happening, it might be better to start the setup process from the factory...

  • Page 23: Troubleshooting

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Troubleshooting Due to the many features and functions of the meter, it’s possible that the setup of the meter does not agree with what an operator expects to see. If the meter is not working as expected, refer to the Diagnostics menu and consult the recommendations described below.

  • Page 24: Quick User Interface Reference

    PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Quick User Interface Reference Pushbutton Function MENU Go to programming mode or leave programming. Hold for 5 seconds to enter Advanced Features menu directly. RIGHT Move to next digit. Go to Arrow previous menu or alphanumeric character selection.

  • Page 25: Eu Declaration Of Conformity

    ATEX Quality Assurance Notification No.: SIRA 10 ATEX M462 ATEX Notified Body for Quality Assurance: CSA Group Netherlands B.V., NB 2813 Utrechtseweg 310 6812 AR, Arnhem, Netherlands Signed for and on behalf of Precision Digital Corporation: Name: Jeffrey Peters Company: Precision Digital Corporation Title:...
  • Page 26 PD6820 Explosion-Proof Loop-Powered Rate/Totalizer Instruction Manual Contact Precision Digital Technical Support Call: (800) 610-5239 or (508) 655-7300 Fax: (508) 655-8990 Email: support@predig.com Sales Support Call: (800) 343-1001 or (508) 655-7300 Fax: (508) 655-8990 Email: sales@predig.com Place Orders Email: orders@predig.com For the latest version of this manual please visit www.predig.com...

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