PD690 Universal Process Meter Instruction Manual • Easy Single Button Scaling (SBS) • 4-20 mA, 0-5 V, or 0-10 V Field Selectable Inputs • 24 V Transmitter Power Supply Standard • Scale Without a Calibrator • Calibrate with a Signal Source • Steady, Accurate Display to ± 199,990 • 11-Point Linearization for Non-Linear Inputs • Square Root Extraction with Low-Flow Cutoff • 41/2 Digit + Extra Zero • NEMA 4X, IP65 Front Panel • 2 or 4 Relays + 4-20 mA Output Options • 115 VAC, 230 VAC, o
Model PD690 Universal Process Meter Instruction Manual INTRODUCTION ......................................................................................4 Typical Applications ..........................................................................4 Ordering Information..........................................................................4 Safety Notice ........................................................................................5 Specifications ..........................................
Model PD690 Universal Process Meter Instruction Manual Select Square Root Extraction (L or S) ..................................24 Program Low-Flow Cutoff ([vtoff)..........................................24 Round Horizontal Tank Calibration Table ..................................25 Isolated 4-20 mA Output Option Programming (ovtpvt)........26 Setting 4 mA Output Value........................................................26 Setting 20 mA Output Value.....................................................
Model PD690 Universal Process Meter Instruction Manual INTRODUCTION This meter is a high performance, easy to use, industrial-grade microprocessor-based digital process meter. It accepts all the standard process signals: 4-20 mA, 1-5V, 0-5V and 0-10V and displays these signals in engineering units on a 41/2 digit display. The display includes an extra zero, which may be used to handle numbers up to 199,990. The meter also provides 24 VDC to power the transmitter.
Model PD690 Universal Process Meter Instruction Manual Safety Notice CAUTION: Read complete instructions prior to installation and operation of the Meter. WARNING: Risk of electric shock. Observe all safety regulations. Electrical wiring should be performed in accordance with all applicable national, state and local codes to prevent damage to the Meter and ensure personnel safety. Do not use this meter to directly drive heavy equipment such as pumps, motors, valves, etc.
Model PD690 Universal Process Meter Instruction Manual SPECIFICATIONS Except where noted all specifications apply to operation at +25ºC Basic Meter INPUTS DISPLAY DECIMAL POINT CALIBRATION RANGE INPUT IMPEDANCE LOOP POWER HOLD READING ACCURACY SQUARE ROOT EXTRACTION LOW FLOW CUTOFF www.predig.com Field selectable: 4-20 mA, 0-20 mA, 0-5 V, 1-5 V, 0-10 V. Bright, large, 0.56" (14.2mm) high efficiency red LEDs. 41/2 digits + extra zero may be switched on to display +/- 19,999(0). Leading zeros blanked.
Model PD690 Universal Process Meter 11-POINT LINEARIZATION Input Range 4-20 mA 0-5 V 0-10 V Instruction Manual Minimum Span Between Inputs (1.6 mA / (Number of points –1)) (0.16 V / (Number of points -1)) (0.32 V / (Number of points -1)) e.g. Minimum span for an 11-point, 4-20 mA calibration is 0.16 mA between inputs. ALARM POINTS ALARM POINT DEADBAND ALARM STATUS INDICATION LOCKOUT NON-VOLATILE MEMORY NORMAL MODE REJECTION POWER Four, any combination of high or low alarms.
Model PD690 Universal Process Meter RESET DEADBAND HIGH OR LOW ALARM FAIL-SAFE OPERATION AUTO INITIALIZATION Instruction Manual User Select: 1. Automatically when input passes reset point. 2. Automatically + Manually (via user supplied switch or front panel ACK button). Manual reset resets all manually resetable relays. 0-100% of full scale, user selectable. User may program any alarm for a high or low trip point. Relay coils are energized in non-alarm condition.
Model PD690 Universal Process Meter Instruction Manual Display Messages and Functions The following table describes the various messages displayed by the meter during programming and operation: Display E-[AL InPt 1 Dspy 1 Inpt 2 Dspy 2 DE[Pt Parameter Select External Calibration Select Internal Calibration Perform External Calibration Perform Internal Calibration (scaling) Input 1 Display 1 Input 2 Display 2 Decimal Point No.
Model PD690 Universal Process Meter Instruction Manual SETUP AND PROGRAMMING Power, Signal, External Functions & Options Connections Disconnect power to the meter before making any connections. Do not connect power or earth ground to any unused or CM terminals. Observe polarity for DC powered Meters. Applying voltage with reverse polarity may damage the instrument.
Model PD690 Universal Process Meter Instruction Manual Overview The following field wiring connections are made to removable screw terminal blocks supplied with the meter: Power, Signal Input, Acknowledge and Hold Options: Relays & 4-20 mA Output 6 5 4 3 2 1 6 5 J3 4 3 2 1 J2 AK H CM S+ S- P - P + L - + J1 L Figure 1: Rear View of Meter (Connectors) Label None None J1 J2 J3 Main Board (Lower) Power Signal, Acknowledge, Hold Options Board (Upper) 4-20 mA Output Relays 1 & 2; NC, NO, Common
Model PD690 Universal Process Meter Instruction Manual AC Powered Meters (Power, Signal, External Functions) 4-20 mA Transmitter – + Signal Input Lockout Selection Jumper Array AC 3 2 1 L L P+ P- S- S+ C H A O L C MD K Figure 2: Transmitter Powered from Meter Loop Power Supply – AC 4-20 mA Transmitter + + – Signal Input Lockout Selection Jumper Array 3 2 1 L L P+ P- S- S+ C H A O L C MD K Figure 3: Transmitter Powered from External Power Supply www.predig.
Model PD690 Universal Process Meter Instruction Manual AC Powered Meters (Continued) 3-Wire Transducer P+ P- Signal Signal Input Lockout Selection Jumper Array AC 3 2 1 L L P+ P- S- S+ C H A O L C MD K See page 20 for Input Signal selection table Figure 4: Three-Wire Transducer Powered from Meter Voltage or Current Input – AC + Signal Input Lockout Selection Jumper Array 3 2 1 L L P+ P- S- S+ C H A O L C MD K See page 20 for Input Signal selection table Figure 5: Voltage or Self-Powered 4-20 mA
Model PD690 Universal Process Meter Instruction Manual DC Powered Meters (Power, Signal, External Functions) 24 VDC Power Supply 4-20 mA Transmitter –+ – + Signal Input Lockout Selection Jumper Array 3 2 1 S- S+ C H A O L C M D K *For signal/power isolation seperate power supplies are required.
Model PD690 Universal Process Meter Instruction Manual Relays & 4-20 mA Output Depending on the model number, the Options Board may contain two or four relays and an Isolated 4-20 mA Transmitter Output. Relay connections are made to removable screw terminal connectors located at J2 and J3 on the Options Board. Connections for the Isolated 4-20 mA Transmitter Output are made to J1 on the Options Board.
Model PD690 Universal Process Meter Instruction Manual 4-20 mA Output The 4-20 mA output from the meter can either be powered from the meter’s internal transmitter power supply, (if it is not being used to power the input loop), or by an external power supply as the following diagrams illustrate: - + Signal Input - - + Meter, Recorder Controller, etc.
Model PD690 Universal Process Meter Instruction Manual Programming Overview The meter is programmed using the ENTER button and three jumper arrays. The ENTER button controls the meter’s Single Button Scaling (SBS) feature that allows the meter to be completely programmed using just one button. The jumper arrays are used for programming the input signal, lockout, relays acknowledge enable and relays failsafe operation.
Model PD690 Universal Process Meter Instruction Manual Figure 13: Two-point External Calibration Flow Chart Push ENTER Apply input 1 signal (e.g. 4 mA) Push ENTER Is entire flashing display OK? YES Push ENTER NO Wait for digit to scroll NO Wait for digit to flash Has input 2 been calibrated yet? YES Is the flashing digit OK? Calibration Complete! YES Push ENTER when OK Push ENTER Is entire display flashing? YES www.predig.
Model PD690 Universal Process Meter Instruction Manual Five Basic Digit/Display-setting Instructions Rather than repeat the Single Button Scaling (SBS) technique for every function it is used in, it will be detailed here and the user can refer to it when necessary. The Single Button Scaling technique is used to program all the meter's functions that require numbers to be entered.
Model PD690 Universal Process Meter Instruction Manual Select Input Signal The meter can be programmed to accept current or voltage input using the Signal Input Selection Array. This jumper array is located at the rear of the instrument, next to the screw terminal block. Remove jumper J3 (if installed) to disable Lockout feature.
Model PD690 Universal Process Meter Instruction Manual Select Calibration Method The meter may be calibrated using an external signal source such as a calibrator (E-[AL), or scaled using the internal source (I-[AL). With I-[AL, a 4-20 mA input can be scaled for any display range without applying a signal. To scale inputs such as 0-5 V, 1-5 V or 0-10 V without applying a signal, it is necessary to first complete an Initial Calibration, see Initial Calibration with External Source (If Needed) on page 20.
Model PD690 Universal Process Meter Instruction Manual General Calibration/Scaling Instructions Calibration is performed from the front panel using the ENTER button. It does not require any tools or disassembly of the meter. A calibrated signal source is required if external calibration (E-[AL) is selected. For best results, allow meter to warm up for at least 30 minutes. The calibration input signals must be within the range of the meter and input 2 must be greater than input 1.
Model PD690 Universal Process Meter Instruction Manual Calibrate Using an External Calibrator (E-[al) If E-[AL (External Calibration) was selected above in Select Calibration Method, the meter must be calibrated with an external calibrator. Desired values can be programmed using the Five Basic Digit/Displaysetting Instructions described on page 19. See Figure 13: Two-point External Calibration Flow Chart on page 18. 1. Push ENTER, when [ALIb appears push ENTER again. 2. InPt 1 flashes.
Model PD690 Universal Process Meter Instruction Manual Select Square Root Extraction (L or S) With the square root extraction function activated, the meter takes the square root of the input signal (the output from a differential pressure transmitter) and displays flow rate. The square root extraction feature is calibrated using the same Single Button Scaling technique that is used for two-point linear calibration.
Model PD690 Universal Process Meter Instruction Manual Round Horizontal Tank Calibration Table The following tables can be used to calibrate the meter for displaying volume in a round horizontal tank. The right-most column in each table gives an example of actual calibration points for a 500-gallon tank. Number of Points: 10 Maximum Error: 0.3% Full Scale Calib. Point 1 2 3 4 5 6 7 8 9 10 Input (mA) 4.0 4.8 6.0 7.2 9.2 14.8 16.8 18.0 19.2 20.0 Display: (% Volume) 0.00 1.80 7.20 14.20 28.10 71.80 85.
Model PD690 Universal Process Meter Instruction Manual Isolated 4-20 mA Transmitter Output Programming (ovtpvt) The Isolated 4-20 mA Transmitter Output option can be programmed without a calibrator. This option can be calibrated so that a 4 mA output is produced for any number displayed by the meter. The 20 mA output may be programmed to correspond to any number that is at least 501 counts greater or smaller than the number corresponding to 4 mA. (Ex.
Model PD690 Universal Process Meter Instruction Manual Alarm Programming Overview The meter is equipped with four alarm points as a standard feature. Each alarm may be programmed for either a high or low alarm and for 0-100% deadband. Front panel LEDs indicate alarm status. Options for two or four relays are available. To program a high alarm, program the set point above the reset point. To program a low alarm, program the set point below the reset point.
Model PD690 Universal Process Meter Instruction Manual Programming Confirmation To verify that the alarm set and reset points have been programmed as desired, push ENTER, and push ENTER again when ALArS appears. Before the display stops flashing #1 set point value, push ENTER again to advance the display to #1 reset point. Continue skipping through the remaining alarm set and reset points.
Model PD690 Universal Process Meter Instruction Manual Alarm Acknowledgment The ACK button on the front panel resets the optional relays only and has no effect on the alarm status LEDs. Automatic & Manual Reset Programming There are two ways to reset the relays: 1. Automatically when the signal passes through the reset point. 2. Automatically + manually via the front panel ACK button, or a user supplied momentary Normally Open push-button across terminals AK and CM at the rear of the instrument.
Model PD690 Universal Process Meter Instruction Manual Lockout Jumper Once the meter has been completely programmed, a lockout jumper can be installed to restrict further modification to the meter. This jumper is located at the rear of the instrument and is labeled J3. When ENTER is pushed with the lockout jumper in place, only ALArS and ovtPvt routines are displayed. These routines may be entered to view their settings, but the settings may not be altered.
Model PD690 Universal Process Meter Instruction Manual Low Voltage DC Loads 1 2 + - 3 L O A D Figure 16: Low Voltage DC Loads Use a diode with a reverse breakdown voltage two to three times the circuit voltage and forward current at least as large as the load current. RC Networks Available from Precision Digital RC Networks are available from Precision Digital and should be applied to each relay contact that switches an inductive load. Part number PDX6901.
Model PD690 Universal Process Meter Instruction Manual OPTIONS CARD REMOVAL & INSTALLATION Meter options are installed at the factory. It is NOT necessary to remove the circuit boards from the case to disable the relays’ fail-safe operation. The fail-safe jumper is located on the Display Board, see Figure 14 on page 29. Refer to the following instructions and illustrations to remove the snap-off cover and the circuit boards from the case. Disconnect power prior to performing the following operations.
Model PD690 Universal Process Meter Instruction Manual To re-install the meter in its case: 1. Fold the Options Board over the Main Board, grasp both boards so the Main Board is on the bottom and the two Boards are separated by about an inch. 2. Insert the two boards together into the case. Be sure both the top and bottom boards engage the rails, which hold them in place. 3. Do not press on the Display Board when seating the assembly in the case. 4.
Model PD690 Universal Process Meter Instruction Manual PROGRAMMED PARAMETER SETTINGS Use the following table to record how your meter is programmed: Input ! 4-20 mA ! Linear or ! 0-5 V ! Square Root Extraction ! 1-5 V ! 0-10 V Number of Calibration Points Low-Flow Cutoff Value Calibration Point Values Input 1 set point Input 2 set point Input 3 set point Input 4 set point Input 5 set point Input 6 set point Input 7 set point Input 8 set point Input 9 set point Input 10 set point Input 11 set
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Model PD690 Universal Process Meter Instruction Manual How to Contact Precision Digital • For Technical Support please call: (800) 343-1001 or (508) 655-7300 fax: (508) 655-8990 e-mail: support@predig.com • For Sales Support or to place an order please call: (800) 343-1001 or (508) 655-7300 fax: (508) 655-8990 e-mail: sales@predig.com • For an online version of this instruction manual please visit www.predig.
