The Precision Digital Loop Leader+ is a loop-powered meter that can be easily installed to show a 4-20 mA signal. It has a large, dual-line display with a 2.8-inch, 5-digit top display that displays the process variable, and a 1.5-inch, 8-character alphanumeric bottom display that displays the units of measure or a tag. Models for feet and inches show the level in feet and inches on the top display, while the bottom line can show a tag or custom message. Additionally, the meter includes a 20-segment bargraph with a numeric percentage representation.
For programming and setup, a free PC-based software, MeterView XL, is available and connects to the meter through a micro USB cable. There are two configurations available: display only and display with two solid-state relays and 4-20 mA analog output. All models come with two open collector outputs and remote contacts. The open collector outputs can be used for alarm indication, while the remote contacts can be used to remotely operate the programming buttons, acknowledge relays, start/stop a timer/stopwatch, and more. The relays can be programmed for alarm indication, on/off control, or pump alternation.
For those seeking intrinsically safe versions of the meter, please click here.
Except where noted all specifications apply to operation at +25°C.
Display
| PD4-6603 |
Dual-line LCD with backlight.
Top: 2.8″ (71 mm), 5 digits 7-segment, FT-IN & fractions.
Bottom: 1.5″ (39 mm), 8 alphanumeric 14-segment characters.
Display may be programmed to turn red and flash a user-defined message on alarm condition. |
| PD4-6604 |
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 |
PD4-6603: FT – IN/*: Automatically reducing fractions to lowest denominator
*FT-IN/16, FT-IN/8, FT-IN/4, FT-IN/2, FT-IN -99FT 11IN 15/16 to 999FT 11IN 15/16
PD4-6604: 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 input in height and the bottom display could display that same input in volume. |
| 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 |
PD4-6603: Top: 999 11 15/16
PD4-6604: Top: 99999
Bottom: 99,999,999 (flashing) |
| Underrange |
PD4-6603: Top -99 11 15/16
PD4-6604: 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 |
Tare function zeros out the meter to accommodate for weight of a container. Tare function can be assigned to a function key or a digital input. |
| Password |
Programmable password restricts modification of programmed settings. |
| 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 |
| 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 |
PD4-6604:
PV1: Linear (2-32 points), square root, or programmable exponent
PV2: Linear (2-32 points) or round horizontal tank
PD4-6603:
PV1: Linear (2-32 points)
PV2: Linear (2-32 points) or Round Horizontal Tank |
| Low-Flow / Low-Height Cutoff |
Point below at which the display always shows zero.
PD4-6604: 0.1 to 999,999 or disable.
PD4-6603: 1/16 to 999FT 11IN 15/16 or disable. |
| 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. |
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 PV (PV1, PV2) 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, or Disable |
| Pulse Output Source |
PV (PV1, PV2) or Test Frequency |
| 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 PV (PV1, PV2) or Digital Input |
Solid-State Relays
| Rating |
250 VAC/VDC @ 1 A resistive
75 VA; 250 VAC; 0.6 A pilot duty (inductive)
25 VA; 250 VDC; 0.6 A pilot duty (inductive) |
| Noise Suppression |
Metal oxide varistors across outputs |
| Relay Assignment |
Pump Alternation, Alarm, Timer, Stopwatch on/off, or Disable |
| Alarm Output Source |
Assign to PV (PV1, PV2) or Digital Input |
| Pump Alternation |
Relays may be programmed to alternate with each pump cycle with an elapsed time override where the pumps will alternate regardless of level. Pump alternation time can be programmed for 0 to 999:59 (hrs:min) |
| Relay (Pump) Runtime |
Meter will keep track of how long each relay (pump) has operated and display this information. |
| Relay (Pump) Cycles |
Meter will keep track of how many times the relays (pumps) have cycled and display this information. |
4-20 mA Transmitter Output
| Accuracy |
±0.05% FS ±0.001mA |
| Output Source |
PV1, PV2, 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 disable underrange; user selectable |
| Overrange |
20.5 mA, 20.8 mA, or 23.0 mA (If input > 20.5 mA); or disable overrange; 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 max/min values, etc. See User section of Display Functions & Messages on page 28 for a complete list of capabilities. |
| 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 |
