Introduction These loop-powered rate/totalizers can display rate up to five digits and total up to eight digits using the total overflow feature described below. The display can be programmed to automatically or manually toggle between rate and total. Standard features include a backlit display with bargraph, on-screen custom engineering units, max/min display and open collector output. There are two models available: the PD684 is for general-purpose applications and the PD689 is for hazardous area applications.
Even with all the features packed into these meters, they're still easy to setup and get running. Everything is programmed from the front panel buttons with no pots or jumpers to deal with. In fact, these indicators can be scaled without a signal source for even quicker setup.
The PD684 and PD689 go just about anywhere with their shallow-depth case, FM Type 4X front, loop-powered backlighting, and wide operating temperature range. It doesn't matter if they're indoors or outdoors, in bright sunlight, or a dimly lit plant, wet, dirty, hot or cold. And the PD689, with its FM Approval and CSA Certification, can be installed in just about any hazardous location.
Square root and programmable exponent functions are standard features on the PD684 and PD689. With these features, these indicators can display flow rate and total from a DP transmitter or open channel flow in weirs and flumes.
Through significant innovation in technology and design, we developed the Loop Leader™ Series of loop-powered rate/totalizer that is loaded the standard features and build tough for all environments.
Full Featured Everything comes standard with these meters. The competition may charge extra for for loop-powered backlighting, open collector output and programmable exponent capability, but these and a host of other key features are standard on these indicators.
Install Just About anywhere Indoors, outdoors, bright sunlight, dimly lit plant, wet, dirty, hot or cold- these indicators go just about anywhere. Their shallow-depth case, FM Type 4X front, loop-powered backlighting, and wide operating temperature range are all standard features. And the PD689 with its FM Approval and CSA Certification can be installed in just about any hazardous location.
4-20 mA Input Connections
Alternating Rate & Totalizer Display Press Enter/ACK button to alternate between rate and total or program the totalizer so the display automatically changes between displaying rate and total every 10 seconds. This feature is particularly useful if the meters are mounted inside a NEMA 4X or an explosion-proof enclosure.
Square Root Function Square Root Function
The square root extraction feature 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
The programmable exponent function is used to linearize the level signal in applications using weirs and flumes and display flow rate in engineering units.
Totalizer Conversion Factor
The totalizer conversion factor is a number which is multiplied by the rate to compute total. For example, if the rate display is gallons per hour and total is desired in liters, a factor of 3.7843 should be used. If the display is gallons per hour and total is desired in gallons, a factor of 1 should be used.
Total & Overflow Display This feature allows the PD684 & PD689 to display total values up to eight digits. This sample shows a total of 68,923,684.
Alarm Condition After an alarm tripped simply press the ACK button for 3 seconds to acknowledge the alarm or wait for the alarm to reset automatically.
Even with all the features packed into these meters, they’re still easy
to setup and get running. Everything is programmed from the front
panel buttons with no pots or jumpers to deal with. In fact, these
meters can be scaled without a signal source for even quicker setup.
Main Menu The Main menu consists of the most commonly used functions: Setup, Program, and Password
To simplify the set up process, functions not needed for most applications are located in the Advanced Featured menu. Press and hold the Menu button for 5 seconds to access the advanced features of the meter.
The open collector output may be assigned as a pulse or alarm output. As a pulse output this feature will produce one pulse output per a given number of counts (user select). For example, these meters can be programmed to produce one pulse for every 500 gallons totalized. This output can be sent to a PLC or a counter. As an alarm output this feature allows high or low rate indication or total setpoint indication.
Installation There is no need to remove the meter from its case to complete the installation, wiring, and setup of the meter.
General Display: 5 digit LCD (-99999 to 99999), 0.60" (15.2 mm) high, 7-segment, automatic lead zero blanking.
Engineering Units: 0.25" (6.4 mm) high, 14-segment.
Bargraph: 20-segment, 0% to 100% indication.
Trend arrows: Up and down trend indication.
Backlight: Bright orange (intensity varies with signal)
Front Panel: FM Type 4X, IP65; panel gasket provided
Display Update Rate: 2.5/second
Overrange: Display flashes 99999
Underrange: Display flashes -99999
Programming Method: Four front panel buttons
Noise Filter: Programmable from 1 to 199
Recalibration: 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.
Non-Volatile Memory: All programmed settings are stored in nonvolatile memory for a minimum of ten years if power is lost.
Voltage Drop: 2.0 V max w/o backlight, 5.7 V max with backlight
Equivalent Resistance: 125 Ù @ 20 mA without backlight, 315 Ù @ 20 mA with backlight.
Normal Mode Rejection: 64 dB at 50/60 Hz
Operating temperature range: -20 to 65°C
Allowable temperature range: -40 to 65°C* (see note below)
Storage temperature range: -40 to 85°C
Relative humidity: 0 to 90% non-condensing
Connections: Screw terminals accept 12 to 22 AWG wire
Enclosure: 1/8 DIN, high impact plastic, UL 94V-0, color: gray
Mounting: 1/8 DIN panel cutout required. Two panel mounting bracket assemblies provided.
Tightening Torque: 4.5 lb-in (0.5 Nm) Screw terminal connectors
Overall Dimensions: 4.68" x 2.45" x 3.79" (119 x 62 x 96 mm)
Weight: 5.7 oz (162 g)
Warranty: 3 years parts and labor
Extended Warranty: 1 or 2 years
Input Input Range: 4-20 mA
Accuracy: ±0.03% of span ±1 count, square root and programmable exponent: 10-100% FS.
Calibration: Scale without signal or calibrate with signal source
Calibration Range: User programmable over entire range of meter
Minimum Span: 0.40 mA between input 1 and input 2
Note: An Error message will appear if input 1 and input 2 signals are too close together.
Input Overload: Over current protection to 2 A max.
Decimal Point: Up to 4 places (d.dddd, dd.ddd, ddd.dd, dddd.d, or ddddd)
Function: Linear, square root, or programmable exponent
Low-Flow Cutoff: -99999 to 99999 (-99999 disables cutoff function)
Temperature Drift: 50 PPM/°C from -40 to 65°C ambient
Totalizer Features Total Display: 0 to 99,999 main total display plus 0 to 999 total overflow for a combined 8 digit total of 99,999,999.
Alternating Display: Display may be programmed to alternate between rate and total every 10 seconds.
Time Base: Seconds, minutes, hours, or days
Totalizer Conversion Factor: 0.0001 to 99999
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 Rollover: Total rolls over when total exceed 99,999,999.
Totalizer Reset: Manual reset or automatic with time delay, or disabled for non-resettable total applications.
Open Collector Output Rating: Isolated open collector, 30 VDC @ 175 mA max.
Alarm Output: Assign to rate or total, high orlow rate alarm.
Deadband: 0-100% of full scale, user selectable
Acknowledge: ACK button resets output and screen indication.
Automatic Reset: Alarm resets automatically when signal reaches the reset point.
Pulse Output: 250 pulses/sec max; pulse width: 3 ms, fixed. If the pulse output exceeds the maximum pulse output, counts are accumulated as pending and are not lost. One pulse per total increment, programmable from 0.0001 to 99999 (decimal point based on total selection).
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