Precision Digital PD4-6620 Loop Leader+ Large Display Loop-Powered Flow Rate/Totalizer

• Large Display NEMA 4X, IP65 Loop-Powered Wall & Pipe Mounted Flow Rate/Totalizers
• 4-20 mA Input Displayed with ±0.02% FS Accuracy
• 2.1 Volt Drop Maximum
• 2.8″ (71 mm) 5 Alphanumeric 14-Segment Characters Top Display
• 1.5″ (39 mm) 8 Alphanumeric 14-Segment Characters Bottom Display
• 20-Segment Bargraph with Numeric Percent Indication
• 8-Digit Total & Grand Total Display, Up to 13 Digits Using Both Lines
• Display Rate & Total Simultaneously
• Automatic or Manual Batch Control
• Display Open Channel Flow with Programmable Exponent Feature
• 32-Point Linearization & Square Root Extraction
• (2) Open Collector Outputs Standard; Assignable to Pulse, Alarm, Timer, or Stopwatch
• (2) Optional Loop-Powered Solid-State Relays; Assignable to Alarm, Control, Timer, or Stopwatch
• Stopwatch & Timer Functions to Drive Relays & Open Collectors
• Optional Isolated 4-20 mA Analog Output
• Display Relay Runtime & Cycle Count via Relay Info Menu
• Free PC-Based MeterView XL USB Programming Software
• Externally DC Powered Backlight with Red Backlight for Alarm Conditions
• Operating Temperature Range: -40 to 75°C (-40 to 167°F)
• Conformal Coated PCBs for Dust & Humidity Protection
• Pipe Mounting Kit Available
• 3-Year Warranty

Except where noted all specifications apply to operation at +25°C.

Display

Display	Dual-line LCD with backlight. Both lines 14-segment alphanumeric. Top: 2.8″ (71 mm) 5 digits Bottom: 1.5″ (39 mm) 8 characters Display may be programmed to turn red and flash a user-defined message on alarm condition.
Top Display	5 digits (-9999 to 99999) or 5 characters (all capital & most lower-case letters)
Bottom Display	8 digits (-9,999,999 to 99,999,999; separated by commas) or 8 characters (all capital & most lower-case letters)
Backlight Power Requirement	24 VDC @ 46 mA, typical
Bargraph	20 segments, numeric percent indication at top
Decimal Point	Up to four decimal places on top display and up to seven decimal places on bottom display
Commas	Commas to indicate 1000s (e.g. 88,987,628) on bottom display only
Dual-Scale Feature	The input can be displayed in different scales on the top and bottom displays. For instance, the top display could display the flow in GPM and the bottom display could display that same input in CFM.
Alarm Indication	Programmable: red backlight, flashing display, bargraph segment flashes on alarm. Backlight requires external 24 VDC.
Custom Alarm Messages	Programmable for each relay/open collector: 8 characters maximum; displayed every 10 sec for 1 sec on bottom display. May be turned off.
Display Update Rate	Ambient > -10°C: 1 Update/Second Ambient = -20°C: 1 Update/2 Seconds From -20°C to -40°C the update rate slows down 1 second for every -2°C (e.g. at -24°C, 1 update/4 seconds).
Overrange	Top: 99999 Bottom: 99,999,999 (flashing)
Underrange	Top: -9999 Bottom: -9,999,999 (flashing)

General

Programming Method	Buttons behind lower panel door & Free PC-based USB programming software
Enclosure & Materials	Material: High impact Polycarbonate with UV stabilizer enclosure, UL 94V-0 Rating: NEMA 4X / IP65 Gasket: Polyurethane Color: gray Includes four PG11 through-hole conduit openings, with two factory installed PG11, IP68, black nylon threaded hole plugs with backing nuts.
Environmental	Operating temperature range: -40 to 75°C (-40 to 167°F) Storage temperature range: -40 to 85°C (-40 to 185°F) Relative humidity: 0 to 90% non-condensing; Printed circuit boards are conformally coated.
Noise Filter	Averages the input signal over a period of time between 1 and 16 seconds to dampen the effects of a noisy signal that causes a jumpy display.
Filter Bypass	0.0 to 99.9% of full scale. Input signal changes greater than bypass value are displayed immediately.
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.
Tare	If the totalizer is disabled, the Tare function zeros out the meter to remove the weight of a container. Tare function can be assigned to a function key or the digital input.
Password	There are three separate passwords available that can be set independently of each other: Main, Total, and Grand Total. The Main password prevents access to the meter Programming Mode. Total and Grand Total passwords prevent resetting the total and grand total, respectively.
Non-Volatile Memory	Total and Grand Total values, and 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
Connections	Removable screw terminals accept 12 to 22 AWG wire. Remote contacts accept 16 to 30 AWG wire.
Tightening Torque	Screw terminal connectors: 4.5 lb-in (0.5 Nm) Mounting screws: 8.0 lb-in max. (0.9 Nm) Remote contacts: 2.5 lb-in (0.28 Nm)
Overall Dimensions	10.6″ x 12.6″ x 4.8″ (270 mm x 320 mm x 121 mm) (H x W x D)
Weight	5.5 lbs (2.5 kg)
Warranty	3 years parts and labor. See Warranty Information and Terms & Conditions for complete details.

Input

Input	4-20 mA
Accuracy	±0.02% of span ±1 count Square root and programmable exponent: 10-100% FS
Voltage Drop	2.1 V maximum
Equivalent Resistance	105 Ω @ 20 mA
Input Overload	Over current protection to 1 A maximum, Over voltage protection to 30 VDC max (between mA+ and mA-/BL-)
Temperature Drift	25 PPM/°C from -40 to 75°C ambient
Function	Linear (2-32 points), square root, or programmable exponent PV2: Linear (2-32 points) or round horizontal tank (If total is disabled and PV2 is enabled)
Low-Flow Cutoff	0.1 to 999,999 or disable. Point below at which the display always shows zero.
HART Transparency	The meter does not interfere with existing HART communications; it displays the 4-20 mA primary variable and it allows the HART communications to pass through without interruption. The meter is not affected if a HART communicator is connected to the loop. The meter does not display secondary HART variables.

Rate/Totalizer

Rate Display	Top display: -9999 to 99999; Bottom display: -9,999,999 to 99,999,999 (with commas)
Total & Grand Total Display	Top display: 0 to 99999; Bottom display: 0 to 99,999,999 (with commas)
13-Digit Total & Grand Total	Up to 9,999,999,999,999 using both lines with 13-digit total feature enabled.
Total Decimal Point	Up to four decimal places on top, up to seven decimal places on bottom. Total decimal point is independent of rate decimal point.
Totalizer	Calculates total based on rate and rate units to display total in engineering units. A custom factor must be programmed if using custom defined units.
Time Base	Seconds, Minutes, Hours, Days
Totalizer Rollover	Totalizer rolls over when display exceeds 99,999,999 (9,999,999,999,999 if 13-digit limit enabled). Relay status reflects display.
Total & Grand Total Reset	Via front panel button, external contact closure on digital input, or MeterView XL.
Total & Grand Total Reset Passwords	Total and grand total passwords may be entered to prevent resetting the total or grand total unless a password is entered.
Non-Resettable Grand Total	Grand total reset may be disabled through the meter interface. Grand total reset may be permanently disabled by selecting YES at the PERMLOCK menu.
• Once the Grand Total has been programmed as “non-resettable” the feature CANNOT be disabled.
Non-Volatile Memory	Total and Grand Total values are stored in non-volatile memory for a minimum of ten years if power is lost.

Batch Control

Methods	Automatic or Manual, count up or count down
Manual Batch Start	Pressing F1 function key starts the batch
Manual Batch Pause/Stop	Pressing F3 once pauses the batch, pressing it twice cancels the batch
Automatic Batching	The Loop Leader+ can be used as an automatic batch controller where batches run continuously without operator input
Batching Relay Operation	Single or dual-relay batching with optional preclose for two-stage operation
Batch Preset	Set via F2 function key anywhere between 0.0001 to 99,999 based on batch total decimal point. If batch total is assigned to bottom, the preset can be up to 8 digits.
Batch Preclose	For two-stage batch application, a preclose value can be set to close the main flow line.
Automatic Batch Restart Delay	1 to 9,999 seconds. The batch will automatically restart after completion of the last batch.

Common Open Collector & Relay Specifications

Number	Two open collectors & two relays
High or Low Alarm	User programmable for high or low alarm
Alarm Deadband	0-100% FS, user programmable
Output Assignment	Alarm, Timer, Stopwatch, or Disable
Alarm Output Source	Assign to rate, total, grand total, or digital input
On & Off Time Delay	0 to 9,999 seconds
Fail-Safe Operation	Independent for each open collector and relay. Fail-safe on, the output is on under normal conditions. Fail-safe off, the output is on under alarm conditions.
Alarm Operation	Automatic, automatic with manual override, latching (manual reset anytime), latching with reset after cleared (manual reset only after alarm has cleared)
Alarm Indication	Programmable: red backlight, flashing display, Bargraph segment flashes on alarm. Backlight requires external 24 VDC.
Custom Alarm Messages	Programmable for each relay/open collector: 8 characters maximum; displayed every 10 sec for 1 sec on bottom display. May be turned off.
Alarm Acknowledge	Front panel ACK button or external digital input resets output and screen indication.
Auto Initialization	When power is applied to the meter, open collectors and relays will reflect the state of the input to the meter.
Timer Output	One-shot or Continuous Off Time Delay: 1 sec to 99:59:59 (hrs:min:sec) On Time: 1 sec to 99:59:59 (hrs:min:sec)
Stopwatch	Output turns on when started and off when stopped.

Open Collector Outputs

Rating	Isolated open collector, sinking NPN 5-30 VDC @ 150 mA maximum
Output Assignment	Pulse, Alarm, Timer, Stopwatch on/off, or Disable
Pulse Output Source	Pulse output based on Rate, Total, Grand Total, or Test Frequency, Alarm, Timer, Total Reset, Stopwatch on/off, or Disable
Pulse Output Factor	0.000001 to 999,999.9
Pulse Width	0.5 ms @ 1 kHz; 500 ms @ 1 Hz; 50% duty cycle
Pulse Output Frequency	1,000 Hz maximum
Quadrature Pulse Output	Available for Output 2 (90° behind Output 1) 500 Hz max
Alarm Output Source	Assign to Rate, Total, Grand Total or Digital Input

Solid-State Relays

Rating	250 VAC/VDC @ 1 A resistive 75 VA; 250VAC; 0.6 A pilot duty (inductive) – UL Code D300 25 VA; 250VDC; 0.6 A pilot duty (inductive) – UL Code R300
Noise Suppression	Metal oxide varistors across outputs
Relay Assignment	Alarm, Sample, Timer, Batch, Stopwatch on/off, or Disable
Alarm Output Source	Assign to Rate, Total, Grand Total, or Digital Input
Relay Runtime	Meter will keep track of how long each relay has operated and display this information.
Relay Cycles	Meter will keep track of how many times the relays have cycled and display this information.

4-20 mA Transmitter Output

Accuracy	±0.05% FS ±0.001mA
Output Source	Rate, total, re-transmit; reverse scaling allowed
Scaling Range	1.00 to 23.0 mA
Disable	High impedance state, less than 1 mA
Calibration	Factory calibrated 4.00 to 20.00 mA
Underrange	1.0 mA, 3.5 mA, or 3.8 mA (If input < 3.5 mA); or or Off; user selectable
Overrange	20.5 mA, 20.8 mA, or 23.0 mA (If input > 20.5 mA); or Off; user selectable
Isolation	500 V input-to-output
Temperature Drift	0.5 μA/°C max from -40 to 75°C ambient
External Loop Power Supply	7.0 VDC to 30.0 VDC maximum
Output Loop Resistance	10-750 Ω @ 24 VDC; 10-1100 Ω @ 30 VDC

On-Board Digital Input

Function	Remote operation of front-panel buttons, acknowledge/reset relays, reset total, reset max/min values, etc.
Contacts	2.1 VDC on contact. Connect normally open contacts across DI+ and DI-
Logic Levels	Logic High: 2.4 to 30 VDC (max) Logic Low: 0 to 0.9 VDC

Remote Contacts

Function	Terminals provided for remote operation of all four programming / operation buttons (use PDA2364-MRUE control station).
Remote Buttons	Menu, Right, Up, Enter
Remote Function Keys	F1 / Reset* F2 / Max* F3 / Ack* *Defaults

MeterView XL Programming Software

Availability	Free download from www.predig.com/meterviewxl
System Requirements	Microsoft® Windows® 7 & 10
Communications	USB 2.0 (Standard USB A to USB B) Cable provided
Configuration	Configure all parameters on the meter. Configure meters one at a time.
Configuration Files	Generate with or without meter connected; Save to file for later use.
USB Power Connection	Meter is powered by USB connection during programming, if 4-20 mA loop is not connected.
Compatibility	Programs created for Loop Leader and Loop Leader+ may be run on either meter. Programs created for VantageView+ and ProtEX+ can be run on either meter. No other program sharing is permissible.

General Compliance Information

Electromagnetic Compatibility

EMC Emissions	• CFR 47 FCC Part 15 Subpart B Class A emissions requirements (USA) • AS/NZS CISPR 11 Class A ISM emissions requirements (Australia) • EN 55011 Group 1 Class A ISM emissions requirements (EU) • ICES-001 Issue 4 ISM emissions requirements (Canada)
EMC Emissions and Immunity	EN 61326-1 EMC requirements for Electrical equipment for measurement, control, and laboratory use – industrial use

Datasheet: Precision Digital PD4-6620 Series Datasheet
Instruction Manual: Precision Digital PD4-6624/28 Instruction Manual