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PD6820 EXPLOSION-PROOF
LOOP-POWERED RATE/TOTALIZER
4-20 mA Input Loop-Powered
Modern, Sleek and Practical Enclosure
5 Digits, 0.7" (17.8 mm) Upper Display
7 Alphanumeric Character, 0.4" (10.2 mm) Lower Display
7-Digit Totalizer
®
SafeTouch
Password Protection
32-Point, Square Root, or Exponential Linearization
Rate in Units per Second, Minute, Hour, or Day
Open Collector Pulse or Alarm Output
Loop-Powered or External DC-Powered Backlight Standard
®
HART
Protocol Transparent
3.0 V Drop (6.0 V with Backlight)
Explosion-Proof, IP68, NEMA 4X Enclosure
Operates from -40 to 75°C
Order from:
C A Briggs Company
622 Mary Street; Suite 101
Warminster, PA 18974
Phone: 267-673-8117 - Fax: 267-673-8118
Sales@cabriggs.com
Through-Glass Button Programming
-
www.cabriggs.com
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Table of Contents
Related Manuals for PRECISION DIGITAL ProtEx PD6820
Summary of Contents for PRECISION DIGITAL ProtEx PD6820
- Page 1 PD6820 EXPLOSION-PROOF LOOP-POWERED RATE/TOTALIZER 4-20 mA Input Loop-Powered Modern, Sleek and Practical Enclosure 5 Digits, 0.7" (17.8 mm) Upper Display 7 Alphanumeric Character, 0.4" (10.2 mm) Lower Display 7-Digit Totalizer ® SafeTouch Through-Glass Button Programming ...
- Page 2 Disclaimer The information contained in this document is subject to change without notice. Precision Digital makes no representations or warranties with respect to the contents hereof; and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose.
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Page 3: Introduction
PD6820 Loop-Powered Process Meter Instruction Manual INTRODUCTION The ProtEX-RT PD6820 is a rugged, explosion-proof loop-powered rate/totalizer fully featured for demanding applications in hazardous areas or in the harshest environmental conditions. The meter derives all of its power from the 4-20 mA loop. It ®... -
Page 4: Table Of Contents
PD6820 Loop-Powered Process Meter Instruction Manual Table of Contents INTRODUCTION ---------------------------------------------------------------------- 3 ORDERING INFORMATION ------------------------------------------------------- 3 SPECIFICATIONS -------------------------------------------------------------------- 6 General ------------------------------------------------------------------------------------------- 6 Input ----------------------------------------------------------------------------------------------- 7 Open Collector Output ---------------------------------------------------------------------- 8 Product Ratings and Approvals --------------------------------------------------------- 9 ... - Page 5 PD6820 Loop-Powered Process Meter Instruction Manual Alarm & Pulse Output (OUTPUT) ..............37 Advanced Function Selection (FUNCTN) ............. 39 Multi-Point Linearization (lnear) ............39 Square Root Linearization (Squar) ............40 Programmable Exponent Linearization (Prog. E ) ........40 ...
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Page 6: Specifications
PD6820 Loop-Powered Process Meter Instruction Manual SPECIFICATIONS Except where noted all specifications apply to operation at +25°C. General DISPLAY Five digits 0.70" (17.8 mm) high, 7-segment, (-9999 to 99999) automatic lead zero blanking. Seven characters 0.4" (10.2 mm) high, 14 segment. (Total and/or Tag) 7-digit Totalizer 9,999,999 Symbols... -
Page 7: Input
PD6820 Loop-Powered Process Meter Instruction Manual Input ACCURACY ±0.03% of calibrated span ±1 count, square root & programmable exponent accuracy range: 10-100% of calibrated span. ADVANCED Linear, square root, or programmable exponent FUNCTION MULTI-POINT 2 to 32 points LINEARIZATION PROGRAMMABLE 1.0001 to 2.9999 EXPONENT LOW FLOW CUT-... -
Page 8: Open Collector Output
PD6820 Loop-Powered Process Meter Instruction Manual Open Collector Output Isolated open collector, 30 VDC @ 150 mA max. RATING ALARM OUTPUT Assign to rate for high or low alarm trip point. Assign to total for total alarm trip point. DEADBAND 0-100% FS, user selectable ACKNOWLEDGE Front panel ACK button resets output and screen indication. -
Page 9: Product Ratings And Approvals
PD6820 Loop-Powered Process Meter Instruction Manual Product Ratings and Approvals Class I, Division 1, Groups B, C, D Class II, Division 1, Groups E, F, G Class III, Division 1; T6 Class I, Zone 1, AEx d IIC T6 Gb Zone 21, AEx tb IIIC T85°C Ta = -40°C to +75°C Enclosure: Type 4X &... -
Page 10: Electromagnetic Compatibility
PD6820 Loop-Powered Process Meter Instruction Manual Electromagnetic Compatibility EN 61326:2013 EMISSIONS Safety requirements for measurement, control, and laboratory use – Industrial Group 1 Class A ISM emissions requirements Radiated Class A Emissions EN 61326:2013 IMMUNITY Safety requirements for measurement, control, and laboratory use ±4 kV contact, ±8 kV air... -
Page 11: Installation
PD6820 Loop-Powered Process Meter Instruction Manual INSTALLATION For Installation in USA: The PD6820 must be installed in accordance with the National Electrical Code (NEC) NFPA 70. For Installation in Canada: The PD6820 must be installed in accordance with the Canadian Electrical Code CSA 22.1. All input circuits must be derived from a CSA approved Class 2 source. -
Page 12: Mounting
PD6820 Loop-Powered Process Meter Instruction Manual Mounting The PD6820 has two slotted mounting flanges that may be used for pipe mounting or wall mounting. Alternatively, the unit may be supported by the conduit using the conduit holes provided. Refer to Mounting Dimensions, page 47 for details. Do not attempt to loosen or remove flange bolts while the meter is in service. -
Page 13: Table Of Figures Figure 1. Connector Board
PD6820 Loop-Powered Process Meter Instruction Manual Connections (continued) SIGNAL + 4-20 mA signal input positive terminal connection SIGNAL - 4-20 mA signal return/negative terminal connection when not using loop powered backlight. +9-30 VDC when powering backlight from external supply. BACKLIGHT + BACKLIGHT - 4-20 mA signal return/negative terminal when using the installed loop powered backlight or ground/negative when... -
Page 14: Input Signal & Backlight Connections
PD6820 Loop-Powered Process Meter Instruction Manual Input Signal & Backlight Connections Signal and backlight connections are made to a four-terminal connector mounted in the base of the enclosure. For installations without backlight, only the two signal terminals are connected. The 4-20 mA input with no backlight has a maximum voltage drop of 3 V and is wired as shown in Figure 2. -
Page 15: External Reset Connection
PD6820 Loop-Powered Process Meter Instruction Manual + - + - OUTPUT RESET SAFE-TOUCH BACKLIGHT BUTTONS POWER + - + - UNLOCK LOCK LOOP 9-36 VDC SIGNAL BACKLIGHT 4-20 mA Slide Switch to Transmitter Power 9-36 VDC Supply Power Supply Figure 4. Input Connections with Externally-Powered Backlight It is possible to use the same transmitter (signal loop) power supply for the externally powered backlight. -
Page 16: Open Collector Output Connections
PD6820 Loop-Powered Process Meter Instruction Manual Open Collector Output Connections Output connections are made to two terminals labeled OUTPUT. Connect to an input device such as alarm indicator or pulse counter as shown in Figure 6, or drive a relay as shown in Figure 7. -
Page 17: Setup And Programming
PD6820 Loop-Powered Process Meter Instruction Manual SETUP AND PROGRAMMING There is no need to recalibrate the meter for milliamps when first received from the factory. The meter is factory calibrated for milliamps prior to shipment. The calibration equipment is traceable to NIST standards. -
Page 18: Safetouch ® Buttons
PD6820 Loop-Powered Process Meter Instruction Manual ® SafeTouch Buttons The PD6820 is equipped with four sensors that operate as through-glass buttons so that it can be programmed and operated without removing the cover (and exposing the electronics) in a hazardous area. These buttons can be disabled for security by selecting the LOCK setting on the switch located on the connector board in the base of the enclosure. -
Page 19: Buttons And Display
PD6820 Loop-Powered Process Meter Instruction Manual Buttons and Display MENU ENTER RESET DISPLAY Button Description Symbol Status Symbol Menu High Alarm Set MENU RESET Right arrow/Reset Low Alarm Set DISPLAY Up arrow/Display Total Alarm Set Enter Password Enabled Enter Press the Menu button to enter or exit the Programming Mode at any time. -
Page 20: Main Menu Display Functions & Messages
PD6820 Loop-Powered Process Meter Instruction Manual Main Menu Display Functions & Messages The meter displays various functions and messages during setup, programming, and operation. The following table shows the main menu functions and messages in the order they appear in the menu. Display Parameter Action/Setting... - Page 21 PD6820 Loop-Powered Process Meter Instruction Manual Display Parameter Action/Setting dsabl Disable Manual reset Disable Enter the Tag/Units Menu Tag/Units Enable Tag/Units Tag On Disable Tag/Units Tag Off togle Toggle Tag and Total Tag Toggle PASSWRD Enter the Password menu Password UNLOCKD Program password to lock meter Unlocked...
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Page 22: Main Menu
PD6820 Loop-Powered Process Meter Instruction Manual Main Menu The main menu consists of the most commonly used functions: Setup, Password, and Service. Press MENU button to enter Programming Mode then press the Up Arrow button to scroll through the main menu. ... -
Page 23: Setting Numeric Values
PD6820 Loop-Powered Process Meter Instruction Manual Setting Numeric Values The numeric values are set using the Right and Up arrow buttons. Press Right arrow to select next digit and Up arrow to increment digit. The digit being changed blinks. Press the Enter button, at any time, to accept a setting or MENU button to exit without saving changes. -
Page 24: Setting Up The Meter (Setup)
PD6820 Loop-Powered Process Meter Instruction Manual Setting Up the Meter (SETUP) The Setup menu is used to select: Rate and total decimal point position Program menu Rate and total tag display Time base Total conversion factor Manual or automatic total reset function Press the Enter button to access any menu or press Up arrow button to scroll through choices. -
Page 25: Setting The Decimal Point (Dec. P T)
PD6820 Loop-Powered Process Meter Instruction Manual Setting the Decimal Point (dec. P T) Rate decimal point may be set with up to four decimal places or with no decimal point at all. Total decimal point may be set with up to six decimal places or with no decimal point at all. -
Page 26: Programming The Meter (Prog)
PD6820 Loop-Powered Process Meter Instruction Manual Programming the Meter (PRoG) It is very important to read the following information, before proceeding to program the meter: There is no need to recalibrate the meter for milliamps when first received from the factory. ... -
Page 27: Scaling The Meter (Scale)
PD6820 Loop-Powered Process Meter Instruction Manual Scaling the Meter (SCale) The 4-20 mA input can be scaled to display the process in engineering units. A signal source is not needed to scale the meter; simply program the inputs and corresponding display values. Figure 8. -
Page 28: Calibrating The Meter (Cal)
PD6820 Loop-Powered Process Meter Instruction Manual Calibrating the Meter (Cal) To scale the meter without a signal source refer to Scaling the Meter (SCale), page 27. The meter can be calibrated to display the process in engineering units by applying the appropriate input signal and following the calibration procedure. -
Page 29: Re-Calibrating The Internal Calibration Reference (Ical)
PD6820 Loop-Powered Process Meter Instruction Manual Minimum Input Span The minimum input span is the minimum difference between input 1 and input 2 signals required to complete the calibration or scaling of the meter. The minimum span is 0.10 mA. If the minimum span is not maintained, the meter reverts to input 2, allowing the appropriate input signals to be applied. -
Page 30: Setting The Total Conversion Factor (Totcf)
PD6820 Loop-Powered Process Meter Instruction Manual Setting the Total Conversion Factor (totCF) Total Conversion Factor is used to convert to a different unit of total display. For example, to display rate in gallons and total in liters, enter a conversion factor of 3. -
Page 31: Manual Or Automatic Total Reset Function (T Rst)
PD6820 Loop-Powered Process Meter Instruction Manual Manual or Automatic Total Reset Function (t rST) The meter may be programmed to reset the total either manually using the Reset button or automatically. Manual reset button may be disabled to avoid inadvertent total reset. -
Page 32: Setting The Tag Display (Tag)
PD6820 Loop-Powered Process Meter Instruction Manual Setting the Tag Display (tag) The meter can be set to display a combination of seven alphanumeric characters for engineering units (e.g. GALLONS) or for identification (e.g. TANK 3). Press Right arrow to select next unit and Up arrow to increment unit. ... -
Page 33: Setting Up The Password (Passwrd)
PD6820 Loop-Powered Process Meter Instruction Manual Setting Up the Password (PASSWRD) The Password menu is used to program a five-digit password to prevent unauthorized changes to the programmed parameter settings. The lock symbol is displayed to indicate that settings are protected. Locking the Meter Enter the Password menu and program a five-digit password. -
Page 34: Disabling Password Protection
PD6820 Loop-Powered Process Meter Instruction Manual Disabling Password Protection To disable the password protection, access the Password menu and enter the correct password twice, as shown below. The meter is now unprotected until a new password is entered. Enter Password Run Mode 3024. -
Page 35: Advanced Features Menu
PD6820 Loop-Powered Process Meter Instruction Manual Advanced Features Menu To simplify the setup process, functions not needed for most applications are located in the Advanced features menu. Press and hold the MENU button for five seconds to access the Advanced features menu. Press the Enter button to access any menu or press Up arrow button to scroll through choices. -
Page 36: Advanced Features Menu & Display Messages
PD6820 Loop-Powered Process Meter Instruction Manual Advanced Features Menu & Display Messages The following table shows the Advanced features menu functions and messages in the order they appear in the menu. Display Parameter Action/Setting OUTPUT Enter output menu Output Disable output Alrm Enter alarm output menu Alarm Output... -
Page 37: Alarm & Pulse Output (Output)
PD6820 Loop-Powered Process Meter Instruction Manual For instructions on how to program numeric values see Setting Numeric Values, page 23. Alarm & Pulse Output (OUTPUT) The PD6820 is equipped with an NPN open collector output that may be set up for high or low rate alarm trip point, total alarm trip point, or pulse output based on K-factor. - Page 38 PD6820 Loop-Powered Process Meter Instruction Manual Alarm Output (alrnm) Rate high alarm trip point: program set point above reset point. Rate low alarm trip point: program set point below reset point. Rate alarm deadband is determined by the difference between set and reset points.
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Page 39: Advanced Function Selection (Functn)
PD6820 Loop-Powered Process Meter Instruction Manual Advanced Function Selection (FUNCTN) The Advanced Function menu is used to select the advanced function to be applied to the input: linear, square root, programmable exponent, or round horizontal tank volume calculation. The multi-point linearization is part of the linear function selection. Meters are set up at the factory for linear function with 2-point linearization. -
Page 40: Square Root Linearization (Squar)
PD6820 Loop-Powered Process Meter Instruction Manual LnEAR FUNCTN PROGRAM PROGRAM inP 1 dsp 1 0000. 0 DSPLY 1 INP 2 Figure 9. Multi-Point Linearization Menu Square Root Linearization (Squar) The square root function can be used to linearize the signal from a differential pressure transmitter and display flow rate in engineering units. -
Page 41: Low-Flow Cutoff (Cutoff)
PD6820 Loop-Powered Process Meter Instruction Manual Low-Flow Cutoff (CUTOFF) The low-flow cutoff feature allows the meter to be programmed so that the often- unsteady output from a differential pressure transmitter, at low flow rates, always displays zero on the meter. The default cutoff is zero to prevent negative readings, but this may be overridden to allow them. -
Page 42: Internal Calibration (Ical)
PD6820 Loop-Powered Process Meter Instruction Manual Internal Calibration (ICAL) There is no need to recalibrate the meter for milliamps when first received from the factory. The meter is factory calibrated for milliamps prior to shipment. The calibration equipment is traceable to NIST standards. The internal calibration allows the user to scale the meter without applying a signal. -
Page 43: Operation
PD6820 Loop-Powered Process Meter Instruction Manual OPERATION Front Panel Buttons Operation Button Description Symbol Press to enter or exit Programming Mode or exit Max/Min readings MENU RESET Press to reset total (if enabled) Press to reset Max/Min readings DISPLAY Press to display Max/Min readings alternately Press to acknowledge alarm (if enabled) Press to display Max or Min reading... -
Page 44: Maximum & Minimum Readings (Maximum & Minimum)
PD6820 Loop-Powered Process Meter Instruction Manual Maximum & Minimum Readings (MAXIMUM & MINIMUM) The maximum and minimum (peak & valley) readings reached by the rate are stored in the meter since the last reset or power-up. The meter shows MAXIMUM or MINIMUM to differentiate between run mode and max/min display. -
Page 45: Factory Defaults & User Settings
PD6820 Loop-Powered Process Meter Instruction Manual Factory Defaults & User Settings The following table shows the factory setting for most of the programmable parameters on the meter. Next to the factory setting, the user may record the new setting for the particular application. Model: ______________ S/N: _______________ Date: _________ Parameter... -
Page 46: Troubleshooting
PD6820 Loop-Powered Process Meter Instruction Manual TROUBLESHOOTING The rugged design and the user-friendly interface of the meter should make it unusual for the installer or operator to refer to this section of the manual. If the meter is not working as expected, refer to the recommendations below. Troubleshooting Tips Symptom Check/Action... -
Page 47: Mounting Dimensions
PD6820 Loop-Powered Process Meter Instruction Manual MOUNTING DIMENSIONS All units: inches [mm] 3.35 [85.1] 2.25 [57.1] 0.32 [8.2] 5.65 [143.5] 5.25 [133.4] Figure 10. Enclosure Dimensions – Front View... -
Page 48: Figure 11. Enclosure Dimensions - Side Cross Section View
PD6820 Loop-Powered Process Meter Instruction Manual 3.35 [85.0] 4.15 [105.5] 4.86 [123.5] 3.22 [81.9] Figure 11. Enclosure Dimensions – Side Cross Section View... -
Page 49: Quick User Interface Reference
PD6820 Loop-Powered Process Meter Instruction Manual QUICK USER INTERFACE REFERENCE Pushbutton Function Menu Go to Programming Mode or leave Programming, Advanced Features, and Max/Min Modes. Right Arrow Move to next digit or decimal point position. Reset Total. Up Arrow Move to next selection or increment digit. Go to Max/Min Mode. Enter/Ack Accept selection/value and move to next selection. - Page 50 PD6820 Loop-Powered Process Meter Instruction Manual...
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Page 51: Eu Declaration Of Conformity
SIRA 10 ATEX M462 ATEX Notified Body for Quality Assurance: Sira Certification Service, NB 0518 Unit 6, Hawarden Industrial Park Hawarden, Deeside, CH5 3US, UK Signed for and on behalf of Precision Digital Corporation: Name: Jeffrey Peters Company: Precision Digital Corporation... - Page 52 PD6820 Loop-Powered Process Meter Instruction Manual How to Contact Precision Digital For Technical Support: Call: (800) 610-5239 or (508) 655-7300 Fax: (508) 655-8990 Email: support@predig.com For Sales Support: Call: (800) 343-1001 or (508) 655-7300 Fax: (508) 655-8990 Email: sales@predig.com ...
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