Precision Digital Corporation PD6820 User manual

FLOW RATE/TOTAL
PD6820
ProtEX-RTA Explosion-Proof Rate/Totalizer
Precision Digital corPoration www.predig.com
• 4-20 mA Input Loop-Powered
• Modern, Sleek and Practical Enclosure
• 5-Digit, 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
• 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 or External DC-Powered Backlight Standard
• 3.0 V Drop (6.0 V with Backlight)
• Explosion-Proof, IP68, NEMA 4X Enclosure
• Flanges for Wall or Pipe Mounting
• HART®Protocol Transparent
• Operates from -40 to 75°C
TM
RTA
OUCH
®
Through-Glass
Button Programming
Rotatable
Display
90°

PD6820 Analog Input Rate/Totalizer Displays rate & total simultaneously
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ProtEX-RTAPD6820AnAlogInPutrAte/totAlIzer
OVERVIEW
The new ProtEX-RTA PD6820 explosion-proof rate/totalizer brings
modern design, easy readability, and enhanced functionality to
hazardous areas around the world in a way never seen before.
Competitors havelost sightof thefact thatthe primarything customers
want to do with meters such as these is to look at them. Customers
want a meter that looks nice so they can be proud to install it in their
facility. They want a meter with a display that provides the important
information about their process, can be seen under varied lighting
conditions, from wide angles, and from a distance. The PD6820
delivers all these and more. Spend a few minutes reviewing the
features described in the graphic above and you will see how!
KEY FEATURES
Informative & Easy to Read Display
The high contrast, backlight LCD display is easy to read from far away
and under various lighting conditions. The upper display is 0.7"high
andshows 5digits offlow rate.Thelowerdisplayis0.4"high andshows
either flow total or a tag with 7 alphanumeric characters.And best of all,
the display is mounted right up against the glass so it can be seen from
a wide viewing angle.
Through-Glass 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. To actuate a
button, press one finger to the glass directly over the marked button area.
When the cover is removed, four mechanical buttons located next to the
sensors are used.
Modern, Sleek and Practical Enclosure
The first thing customers notice about a product is its enclosure
and the ProtEX-RTA really shines here. The copper-free (0.30%),
smooth, die-cast aluminum NEMA 4X (IP68) enclosure is finished
with a corrosion resistant epoxy coating that literally does make
the ProtEX-RTA shine. The built-in mounting flanges make for
convenient wall or pipe mounting and there is even a slot on the
back of the enclosure for centering on the pipe. There are two ¾"
NPT conduit holes for wiring.
Isolated Open Collector Output
The isolated open collector output on the PD6820 may be assigned
for use with the alarm or totalizer (pulse output). The rating of the
output is 30 VDC @ 150 mA max.
Perfect & Secure Fit Every Time
The internal cast rails ensure the ProtEX assembles together
perfectly, quickly and securely; and everything lines up for optimal
viewing every time. There are no standoffs to worry about breaking
or getting out of alignment. Two spring-loaded, self-retaining,
thumbscrews make the assembly a snap, while pressing the LCD
as close to the glass as possible to improve wide angle viewing.
Wide Viewing Angle
TM
RTA
Process Variable
Mounting Flanges
(Up to 2½" Pipe)
Alphanumeric
Engineering Units
SafeTouch®
Menu Button
SafeTouch®
Reset or Right Arrow
SafeTouch®
Display or Up Arrow
Two ¾" NPT
Conduit Holes
Locking Screw
Ground Screw
Mechanical Buttons
(4 Places)
Password Protection
Alarm Indicator
Backlight Standard
Explosion-Proof
Die-Cast Aluminum
NEMA 4X Enclosure
OUCH
®Through-Glass Button Programming
Flow Totalizer
Flow Rate Indicator
Rate & Total
Programming
Rate/Totalizer Displays
Easy to Setup
0.4" (10.2 mm)
7-Character
(Alphanumeric)
0.7" (17.8 mm)
5-Digit
SafeTouch®
Enter or Alarm
Acknowledge Button

3
ProtEX-RTAPD6820AnAlogInPutrAte/totAlIzer
CONNECTIONS
Backlight
Power Switch
Lock/Unlock
SafeTouch
Buttons Switch
External
Totalizer
Reset
Open
Collector
Output
SAFE-TOUCH
BUTTONS BACKLIGHT POWER
UNLOCK LOCK LOOP
9-30 VDC
+-+-
SIGNAL BACKLIGHT
+-+-
OUTPUT RESET
See LIM6820 manual for wiring instructions
INSTALLATION
Installation Flexibility
The PD6820’s rotatable display/meter module along with two
available conduit connections provide for numerous installation
options. The display can be rotated in 90° increments. Rotate it 90°
for horizontal mounting. Wiring can then be routed to either the top
conduit connection, or from below to the opposite conduit connection
(metal conduit plug supplied). Use both conduit connections for
through-wiring in any plane.
Easy Wiring & Service
Unscrew the two captured thumb screws and unplug a connecting
cable and the display/meter module is simply and completely
removed. A heavy duty terminal block is then easily accessed and
wired. It is clearly marked to prevent wiring errors. The display/
meter module can be removed without breaking the loop. As such,
it can be serviced without the need to uninstall the entire product.
TOTALIZER CAPABILITIES
Totalizer Pulse Output
The totalizer pulse output function requires use of the open collector
output. It will output a pulse at a user adjustable pulse rate, and can
be scaled with a K-factor of between 0.0001 and 99999. Example:
For 1 pulse every 500 gallons, set the K-factor to 500. This output
can be sent to a PLC or counter.
Totalizer Conversion Factor
Total Conversion Factor is used to convert to a different unit of
measure for the total display. For example, to display rate in gallons
and total in liters, enter a conversion factor of 3.7854. When rate and
total units are the same, the Conversion Factor should be 1.0000.
Total Reset
The total can be reset either manually via the front panel RESET
button or external contact; or automatically using a programmed
setpoint and delay time. Total reset can also be disabled.
INPUT SIGNAL CONDITIONING
Live Input Calibration
In lieu of meter scaling, the meter can be calibrated with a precision
signal source. While applying a precision signal, the relative scale
value is entered via the front panel. This is done at any two points
along the scale. Using this method, the operator can set a “best fit
straight line” for non-linear input spans.
Multi-Point Linearizer
Up to 32 linearization points can be selected under the Linear
function. The multi-point linearization can be used to linearize the
display for non-linear signals such as those from level transmitters
used to measure volume in odd-shaped tanks or to convert level
to flow using weirs and flumes that require a complex exponent.
These points are established via direct entry (SCALE) or with an
external calibration signal (CAL).
Square Root Extraction
The square root extraction function displays flow rate by extracting
the square root from a differential pressure transmitter signal. The
user selectable low-flow cutoff feature gives a reading of zero when
the flow rate drops below a user selectable value.
Programmable Exponent
The programmable exponent function is used to linearize the level
signal in open channel flow applications using weirs and flumes
and display flow rate & total, units of measure, or toggle between
total and units of measure.
ADDITIONAL FEATURES
Password Protection
A5-digitpasswordpreventsunauthorizedchangestotheprogrammed
parameter settings. The lock symbol is displayed to show that
settings are protected. If the meter is password protected, the meter
will display the message LOCKED when the Menu button is pressed.
Alarm Indication
The PD6820 can be configured to have a high or low rate alarm
indicator, or a total alarm trip point indicator. The OC output is
available for use as an alarm output. When in alarm mode, the
display will flash, and a HI or LO symbol is displayed. The alarm
has an adjustable deadband and is acknowledged by pressing the
ENTER button.
Die-Cast Rails
(4) places
Internal View

ProtEX-RTAPD6820AnAlogInPutrAte/totAlIzer
www.predig.com
LDS6820_E 02/16
Precision Digital corPoration
233 South Street • Hopkinton MA 01748 USA • Tel [phone] • Fax [phone]
Rate/Totalizer
Rate Display: 0 to 99,999 leading zero blanking
Total Display: 0 to 9,999,999 leading zero blanking
Total Decimal Point: Up to six decimal places or none: d.dddddd,
d.ddddd, d.dddd d.ddd, d.dd, d.d, or ddddddd
Lower Display Configuration: Can be programmed to display total, tag
name/engineering units, or to alternate between them.
Totalizer: Calculates total based on rate, time base of second, minute,
hour, or day, and field programmable multiplier; stored in non-volatile
memory upon power loss.
Totalizer Reset: Via front panel SafeTouch®button, time delay, external
contact closure, or protected
Total Conversion Factor: 0.000001 to 9,999,999
Totalizer Rollover: Display rolls over when display exceeds 9,999,999.
Relay status reflects the displayed value.
Total Reset Delay: Programmable from 0 to 99,999 seconds
Product Ratings & Approvals
FM: Explosion-proof for use in 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 to 75°C. Enclosure: Type 4X & IP66.
Certificate number: 3040391
ATEX: II 2 G D. Ex d IIC T6 Gb.
Ex tb IIIC T85°C Db IP68.
Ta = -40 to 75°C.
Certificate number: Sira 10ATEX1116X
CSA: 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, Ex d IIC T6.
Ta = -40 to 75°C. Enclosure: Type 4X & IP66.
Certificate number: 11 2325749
IECEx: Ex d IIC T6 Gb.
Ex tb IIIC T85°C Db IP68.
Ta = -40 to 75°C
Certificate number: IECEx SIR 10.0056X.
SPECIFICATIONS
Except where noted all specifications apply to operation at +25°C.
General
Display: Upper: Five digits (-9,999 to 99,999) 0.70" (17.8 mm) high,
7-segment, automatic lead zero blanking. Lower: Seven characters
0.4" (10.2 mm) high, 14 segment alphanumeric. Symbols: for high & low
alarm, password lock. Backlight: white
Display Update Rate: Ambient > -25°C: 2 Updates/Second.
Ambient < -25°C: 1 Update/5 Seconds
Externally Powered Backlight:
Voltage Range: 9-36 VDC
Supply Voltage 9 VDC 12 VDC 24 VDC 30 VDC
Maximum Power 0.2 W 0.25 W 0.5 W 0.75 W
Display Orientation: Display may be mounted at 90° increments up to
270° from default orientation.
Overrange: Display flashes 99,999
Underrange: Display flashes -9,999
Programming Method: Four SafeTouch®through-glass buttons when
cover is installed. Four internal pushbuttons when cover is removed.
Noise Filter: Programmable Lo, Med, Hi, or Off
Recalibration: Recalibration is recommended at least every 12 months.
Max/Min Display: Max/Min readings reached by the process are stored
until reset by the user or until power to the meter is turned off.
Password: Programmable password restricts modification of
programmed settings.
Advanced Functions: Live input calibration, linearization, square root, or
programmable exponent
Non-Volatile Memory: All programmed settings are stored in non-volatile
memory for a minimum of ten years if power is lost.
Normal Mode Rejection: 64 dB at 50/60 Hz
Operating Temperature Range: -40 to 75°C.
Storage Temperature Range: -40 to 85°C.
Relative Humidity: 0 to 90% non-condensing
Connections: Screw terminals accept 12 to 22 AWG wire
Enclosure: Explosion-proof die-cast aluminum with glass window,
corrosion resistant epoxy coating, color: blue. NEMA 4X, 7, & 9, IP68.
Copper-free (0.3%). Two ¾" NPT threaded conduit openings.
One ¾" NPT metal conduit plug with 12 mm hex key fitting installed.
Mounting: May be mounted directly to conduit. Two slotted flanges for
wall mounting or NPS 1½" to 2½" or DN 40 to 65 mm pipe mounting.
Overall Dimensions: 5.65" x 5.25" x 4.86" (W x H x D)
(144 mm x 133 mm x 124 mm)
Weight: 5.00 lbs (80 oz, 2.27 kg)
Warranty: 3 years parts and labor
Input
Input range: 4-20 mA
Accuracy: ±0.03% of calibrated span ±1 count, square root &
programmable exponent accuracy range: 10-100% of calibrated span.
Temperature Drift: 50 PPM/°C
Decimal Point: User selectable decimal point
Calibration Range: An error message will appear if input 1 and input
2 signals are too close together. Input Range: 4-20 mA. Minimum Span
Input 1 & Input 2: 0.10 mA
Maximum Voltage Drop: 3.0 VDC @ 20 mA without loop-powered
backlight. 6.0 VDC @ 20 mA with loop-powered backlight
Equivalent Resistance: 150 Ω @ 20 mA without loop-powered
backlight. 300 Ω @ 20 mA with loop-powered backlight
Input Overload: Over current protection to 2 A max.
Open Collector Output
Rating: Isolated open collector, 30 VDC @ 150 mA max.
Alarm Output: Assign as rate alarm or total alarm trip point.
Deadband: 0-100% FS, user selectable
Acknowledge: Front panel ENTER button resets output and screen indication.
Pulse Output K-Factor: K-factor programmable from 0.0001 to 99999.
Pulse Output Frequency: 2, 4, 8, 16, 32, 64, 128 Hz. Minimum pulse
width: 3.9 ms @ 128 Hz. Maximum pulse width: 250 ms @ 2 Hz. Factory
default pulse width: 31 ms @ 16 Hz
ORDERING INFORMATION
ProtEX-RTA PD6820 • Analog Input Rate/Totalizer
Model Description
PD6820-0K1 PD6820 Analog Input Rate/Totalizer with Backlight
Your Local Distributor is:
Disclaimer
The information contained in this document is subject to change without notice. Precision Digital
Corporation makes no representations or warranties with respect to the contents hereof, and
specically disclaims any implied warranties of merchantability or tness for a particular purpose.
©2011-2016 Precision Digital Corporation. All rights reserved.
DIMENSIONS
3.35 (85.1) 2.25 (57.1)
3.35 (85.0)
4.15 (105.5)
3.22 (81.9) 4.86
(123.5)
0.33
(8.4) 5.65
(143.5)
5.25 (133.4)
3.35 (85.1) 2.25 (57.1)
3.35 (85.0)
4.15 (105.5)
3.22 (81.9) 4.86
(123.5)
0.33
(8.4) 5.65
(143.5)
5.25 (133.4)
Units: Inch (mm)