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PD6720 Field-Mount Loop-Powered Rate/Totalizer 

Instruction Manual 

 

7

 

Safety Information 

 

 

Read complete instructions prior to installation 
and operation of the meter. 

 

Installation and service should be performed only 
by trained service personnel. Service requiring 
replacement of internal components must be 
performed at the factory. 

 

If the meter is installed in a high voltage 
environment and a fault or installation error 
occurs, high voltage may be present on any lead. 

Installation 

Wiring connectors are accessed by opening the 
enclosure. To access electrical connectors, remove 
the 2 captive screws, then disconnect the ribbon 
cable from the display module and set the display 
module aside. 

Unpacking 

Remove the meter from box. Inspect the packaging 
and contents for damage. Report damages, if any, to 
the carrier. 

If any part is missing or the meter malfunctions, 
please contact your supplier or the factory for 
assistance. 

Pre-Installed Conduit Plug 

The PD6720 is supplied with two pre-installed conduit 
plugs for installations that do not require the use of all 
three conduit entries.  

Mounting 

The PD6720 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 

Figure 1 

and

 Figure 2

. 

 

 

Do not attempt to loosen or remove flange bolts 
while the meter is in service. 

Dimensions 

All units: inches [mm] 

 

 

 

Figure 1. Enclosure Dimensions 

– Front View 

 

 

Figure 2. Enclosure Dimensions 

– 

Side Cross Section View 

 

 

 

 

Summary of Contents for PD6720 Series

Page 1: ...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 SafeTouchTM Thro...

Page 2: ...Terms Conditions on www predig com for complete details 2020 Precision Digital Corporation All rights reserved Introduction The PD6720 is a rugged field mount loop powered rate totalizer fully featur...

Page 3: ...ime Base t base 15 Setting the Total Conversion Factor totCF 15 Manual or Automatic Total Reset Function t rST 16 Setting the Tag Display tag 16 Setting Up the Password PASSWRD 17 Locking the Meter 17...

Page 4: ...Enclosure Dimensions Side Cross Section View 7 Figure 3 Connector Board 8 Figure 4 Connections without Backlight 9 Figure 5 Connections with Loop Powered Backlight 9 Figure 6 Connections with Externa...

Page 5: ...Environmental Operating temperature range 40 to 75 C Storage temperature range 40 to 75 C Relative humidity 0 to 90 non condensing Connections Screw terminals accept 12 to 22 AWG wire Enclosure NEMA...

Page 6: ...able from 0 to 99 999 seconds Open Collector Output Rating Isolated open collector sinking NPN 30 VDC 150 mA max Alarm Output Assign to rate for high or low alarm trip point Assign to total for total...

Page 7: ...and set the display module aside Unpacking Remove the meter from box Inspect the packaging and contents for damage Report damages if any to the carrier If any part is missing or the meter malfunction...

Page 8: ...t from external supply OUTPUT NPN open collector output positive OUTPUT NPN open collector output negative RESET Contact closure alarm acknowledge pull up to 3 VDC RESET Contact closure alarm acknowle...

Page 9: ...ions are made to two terminals labeled RESET Connect to a contact closure source such as a relay or a pushbutton as shown in Figure 7 Figure 7 Reset Connections Open Collector Output Connections Outpu...

Page 10: ...sors are disabled when a mechanical button is pressed and will automatically be re enabled after 60 seconds of inactivity The SafeTouch buttons are designed to filter normal levels of ambient interfer...

Page 11: ...nds to access the Advanced features of the meter Right Reset Button Press the Right arrow button to move to the next digit or decimal position during programming Up Display Button Press the Up arrow b...

Page 12: ...ogram menu sCalE Scale Enter the Scale menu Cal Calibrate Enter the Calibrate menu Inpt1 Input 1 Calibrate input 1 signal or program input 1 value DspL1 Display 1 Program display 1 value Inpt2 Input 2...

Page 13: ...w 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 The decimal p...

Page 14: ...functions are exclusive of each other The meter uses the last function programmed Only one of these methods can be employed at a time The Scale and Calibrate functions can use up to 32 points default...

Page 15: ...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 Re...

Page 16: ...on choose man dsabl To reset total upon total alarm set point choose auto enter a time delay t dly and proceed to programming the set point see Alarm Output alrm on page 19 Press the Enter button at a...

Page 17: ...returns to its password protected condition Disabling Password Protection To disable the password protection access the Password menu and enter the correct password twice as shown below The meter is n...

Page 18: ...total Set Set Point Program set point Reset Reset Point Program reset point Pulse Pulse Output Program pulse output Scaler Count MAX HZ Frequency Program pulse output maximum frequency Funct Function...

Page 19: ...deadband is one display count If set and reset points are programmed the same output will reset one count below set point Total alarm trip point program total set point Alarm reset is triggered by tot...

Page 20: ...rent source instead of using input scaling This process will override previously programmed scaling points Apply a live signal using a known accurate signal source InP 1 32 and then enter the correspo...

Page 21: ...ging time and so the longer the display may take to find its final value The filter contains a noise filter bypass feature so that while small variations in the signal will be filtered out large abrup...

Page 22: ...he factory defaults Instructions to load factory defaults Enter the Advanced features menu Press and hold Reset button when INFO is shown Press Enter when RESET DFALTS prompt is shown Note If Enter is...

Page 23: ...exit Max Min display readings Display response is too slow Check filter setting to see if it can be lowered to LO or OFF If the display locks up or the meter does not respond at all Perform hard rese...

Page 24: ...on or increment digit Cycle through maximum minimum and mA display mode ENTER Accept selection value and move to next selection Acknowledge alarms Max Min Mode While in Run Mode pressing Up Arrow will...

Page 25: ...990 www predig com LIM6720_C SFT049 Ver 1 200 up 07 20 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 34...

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