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Partlow MRC 7800 Installation, Wiring, Operation Manual

One and two pen circle chart flow recorder
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ONE AND TWO PEN CIRCLE CHART FLOW RECORDER
MRC 7800
l
Installation, Wiring, Operation Manua
QUALITY INSTRUMENTATION DESIGNED & MANUFACTURED IN THE U.S.A.

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Summary of Contents for Partlow MRC 7800

  • Page 1 ONE AND TWO PEN CIRCLE CHART FLOW RECORDER MRC 7800 Installation, Wiring, Operation Manua QUALITY INSTRUMENTATION DESIGNED & MANUFACTURED IN THE U.S.A.
  • Page 2 Partlow-West Company. This is the Seventh Edition of the MRC 7800 Flow Recorder manual. It was written and produced entirely on a desk- top-publishing system. Disk versions are available by writ- ten request to the Partlow Advertising and Publications Department.

  • Page 3: Table Of Contents

    Table of Contents SECTION 1 - GENERAL Page Number Product Description SECTION 2- INSTALLATION & WIRING 2.1 Installation & Wiring 2.2 Unpacking 2.3 Location 2.4 Mounting 2.5 Preparation for Wiring 2.6 Wiring Connections SECTION 3 - GENERAL OPERATION 3.1 How the instrument operates SECTION 4 - CONFIGURATION &...
  • Page 4 FIGURES & TABLES Figure 1-1 Front View Figure 1-2 Display Features Figure 2-1, Panel Dimensions Figure 2-2 Board & Terminal Locations Figure 2-3 AC Power Input Figure 2-4 Volt, millivolt, & milliamp Input Figure 2-5 Transmitter Power Supply Input Figure 2-6 Remote Reset Input Figure 2-7A Relay Output (SPST)

  • Page 5: Section 1 - General

    Product Description 1.1 1.1.1 GENERAL The instrument is a microprocessor based circular chart recorder capable of measuring, displaying, recording, and datalogging flow process variables. Three square root extraction algorithms are available for use with a variety of transmitters and transducers, and four algorithms are available for use with a variety of weirs and flumes.
  • Page 6 1.1.3 DISPLAYS Each unit is provided with an eight character digital display and status indicators for each pen provided. The display provided in the upper right corner is for Pen 1, and the display in the lower right corner is for Pen 2. Status indication is provided for Alarm 1 and Alarm 2. The display is programmable for none, one, two or three decimal places for process value and total, with additional scaling ability for the total.

  • Page 7: Installation & Wiring 2.1

    Installation & Wiring 2.1 CAUTION: The Instrument AC power input is as specified in the model number; 115VAC or 230VAC. Verify the AC power input provided with the instrument prior to proceeding with installation. Read these instructions carefully before proceeding with installation and operation. Electrical code requirements and safety standards should be observed.

  • Page 8: Preparation For Wiring 2.5

    FIGURE 2-1 13 3/16 (335 mm) 3 3/4 (64 mm) (384.2 15 1/8 (92.3 mm) mm). WIDTH OF COVER 4 11/16 (119.1 mm) 2 19/32 (65.9mm) 9/32 DIA.(7.1mm) Mounting 12 5/8 Bracket 7 1/2 (320.7 (190.5 7/32 13 1/2 (342.5 mm ) (5.5 mm) 13 15/16 (354 mm)

  • Page 9: Wiring Connections 2.6

    2.5.1.2 AC POWER WIRING Earth Ground Each unit includes noise suppression components attached to the chassis that require an earth ground connection. To verify that it is earth ground being attached, make a resistance check from instrument chassis to the nearest metal water pipe or proven earth ground. This reading should not exceed 100 ohms.
  • Page 10 2.6.1 ELECTRICAL CONDUIT OPENINGS The instrument case will have 3 or 4 conduit openings, depending upon the number of outputs specified. To help minimize electrical noise that may adversely affect the operation of the instrument, the wires indicated below should be routed through the conduit opening specified. See Figure 2-1 (page 8) for conduit opening locations.
  • Page 11 FIGURE 2-4 Volt, Millivolt and milliamp Input Make the volt, millivolt or milliamp conections as shown below. Use TB4 for Pen 1 and TB5 for Pen 2. Terminal 1 is positive and terminal 2 is negative. Be sure that input conditioning jumpers are in the correct positions for the input being connected.
  • Page 12 FIGURE 2-6 Remote Reset Input Make connections as shown. Use TB4 for Pen 1 and TB5 for Pen 2. Terminal 3 is ground and terminal 4 is the input. TB4 or TB5 SHIELDED TWISTED PAIR REMOTE CONTACT 2.6.3 OUTPUT CONNECTIONS Relay outputs, if provided in the instrument, may be assigned to alarm, preset, or pulsed output functions for Pen 1 and/or Pen 2 (if present).
  • Page 13 FIGURE 2-7B Relay Output (SPDT) POWER LOAD 5 AMPERES C N.C MAXIMUM 1 2 3 AT 115 VAC TB6 OR TB7 FIGURE 2-8 SSR Driver Output Connections are made to relays H through A as shown. Terminal connections are made using TB9, TB8, etc.

  • Page 14: How The Instrument Operates 3.1

    How The Instrument Operates 3.1 3.1.1 OFF MODE In the Off mode, the instrument alarm and preset function(s) is/are turned off, pulsed output(s) are inactive and process retransmission signal(s) remain(s) active. The chart rotation can be selected in the Program mode to stop or continue to rotate when the instrument is in the Off mode.
  • Page 15 3.1.2.2 PULSED OUTPUTS Pulsed output(s), one for each pen, can be implemented on instruments provided with the totalization feature and a relay that is not assigned to any other function. Pulsed output is selected in the Program mode. With a pulsed output select (PoS) equal to 1, each time the Totalizer Display is incremented, the relay that is assigned, in the Program mode, as a pulsed output will close for a duration of 50 milliseconds or 60 milliseconds based on a 60 Hz or 50 Hz line frequency, respectively.
  • Page 16 3 STAGE SQUARE ROOT EXTRACTION - EuPA = 3 This approach is used to further minimize the process value below a 1% input, since it is even less meaningful. Below 1% a low gain linear function is applied. Between 1% and 2.5% a higher gain linear function is applied.
  • Page 17 3.1.2.6. TOTALIZER FACTOR Scaling of the displayed total is possible, with the use of totalizer factor, tFAC. When used, the displayed value is multiplied by a factor to obtain the actual total. See Table 3-2. TABLE 3-2 tFAC = 0 Actual Total = Displayed Total Times 1 tFAC = -1 Actual Total = Displayed Total Times 10...

  • Page 18: Configuration Introduction 4.1

    Configuration Introduction 4.1 After completing installation of the unit, the configuration procedures contained within this section must be performed to prepare the unit for operation on the intended application. The procedures include selecting specific parameters, entering data and possible jumper position- ing.

  • Page 19: Shipped Configuration/Jumper Positioning

    Shipped Configuration/Jumper Positioning 4.2 Each instrument is factory shipped ready to accept a 4-20 mA process input on each speci- fied pen. All configuration parameters in each mode are set to default values. These defaults are shown in tabular form under the description for each mode. Instrument AC power input is as specified in the instrument model number and as shown on the ratings label.

  • Page 20: Start Up Procedure 4.4

    4.3.2 CONFIGURATION DISPLAYS Each pen specified is provided with its own 4 digit LED display (8 digits for totalization option). These are used during configuration to display the parameter codes and values. The display located in the upper right hand corner of the instrument is used to show the codes for Pen 1 and those that are common between Pens 1 and 2.

  • Page 21: Configuration & Operation

    Step 2B - For instruments with software revision r3.00 and above Upon power up, a brief flash on all displays (upper and, if equipped, lower) will occur to show the instrument is "alive". Then 7XXX will be displayed (X representing digits) then XXXX, then XXXX, identifying the twelve digit model number as defined in the order matrix.
  • Page 22 DISPLAY SELECT: Used to: 1. For units specified with totalization, to change the value displayed between Process Value (PV) Total (TOT), Combined Flow/Total, and Alternate Process Value. 2. For units not specified with totalization, this key has no function. 3. DISP/SEL and UP will reset 1st pen total. DISP/SEL and DOWN will reset 2nd pen total.
  • Page 23 4.5.3.2 MOVEMENT IN THE PROGRAM MODE Each time the DOWN key is depressed while a parameter code is being displayed, such as inPS, another parameter code will be displayed. Depressing the SCROLL key while a parameter code is displayed will cause the parameter value to appear.
  • Page 24 4.5.5 DATA LOGGER SETUP MODE CONFIGURATION PROCEDURE The Data logger setup mode allows the entry, review, or altering of the datalog settings. 4.5.5.1 ENTERING THE DATA LOGGER SETUP MODE From the Operation or any other mode code, depress the SCROLL key until dLS is displayed. With dLS in the top display, depress the DOWN key to enter the mode.
  • Page 25 4.5.7 TOTALIZATION CONFIGURATION Selection of the totalization funciton, how to reset the totalizer, the decimal position, the low flow cutoff point, the time base and the functions of the presets are all covered in the Program mode. Preset values are adjusted in the Preset Adjust mode. 4.5.8 RESETTING THE TOTALIZER Resetting the Totalizer (to 0) can be accomplished from the keypad or from a remote contact closure.
  • Page 26 TABLE 4-2 PROGRAM MODE CONFIGURATION PROCEDURE Press the SCROLL key until Prog is displayed. Press the DOWN key to enter the Program mode. PEn1 will be displayed in the upper display. To enter the Pen 1 parameter, press the DOWN key. To enter the Pen 2 parameter, if provided, press the SCROLL key, then the DOWN key.
  • Page 27 DISPLAY AVAILABLE FACTORY YOUR STEP DESCRIPTION CODE SETTINGS SETTING SETTING Engineering Units EuL2 0 to 9999 Lower Value 2 Number of piecewise nPtS 2 to 20 linear points Input Units-Point 1 iu 1 100.0 Input Units-Point 2 iu 2 iu 3 Input Units-Point 3 •...
  • Page 28 DISPLAY AVAILABLE FACTORY YOUR STEP DESCRIPTION CODE SETTINGS SETTING SETTING PSS1 Preset Select 1 0=Off 1=On when Total>Preset Value 2=On when Total<Preset Value 3=On when Combined Total > Preset Value 4=On when Combined Total < Preset Value Preset Select 2 PSS2 Same selection as PSS1 Preset Select 3...
  • Page 29 DISPLAY AVAILABLE FACTORY YOUR STEP DESCRIPTION CODE SETTINGS SETTING SETTING Current OutputB Curb Same selection as CurA Assignment Current Output C CurC Same selection as CurA Assignment Current Output D Curd Same selection as CurA Assignment Current OutputA CoAr 0=0-20mA Range 1=4-20mA Current Output B...
  • Page 30 TABLE 4-3 ALARM SET MODE CONFIGURATION PROCEDURE Press and release the SCROLL key until ASEt is displayed, then press the DOWN key. Press the SCROLL key to advance the display through the parameters DISPLAY AVAILABLE FACTORY YOUR STEP DESCRIPTION CODE SETTINGS SETTING SETTING...
  • Page 31 TABLE 4-5 PRESET ADJUST MODE CONFIGURATION Depress the SCROLL key until PSA is displayed. With PSA displayed, press the DOWN key to enter the Preset Adjust mode. PS1H will be displayed in the upper display, assuming it has been selected in the Program mode. When the SCROLL key is depressed, the value will be displayed.

  • Page 32: Data Logger Display Mode 4.6

    Data Logger Display Mode 4.6 4.6.1 DATA LOGGER DISPLAY MODE OPERATION The Data Logger Display mode allows the user to view the parameters and values that are stored during data logging. In the Data Logger Display mode, the instrument operational functions are all active, as in the Operate mode.
  • Page 33 TABLE 4-6 DATA LOGGER DISPLAY MODE Depress the SCROLL key until dLd is displayed. Use the DOWN key to enter the Data Logger Display mode. With dAy displayed, press the SCROLL key. Use the UP or DOWN key to set the value equal to the day that is to be viewed. Press the SCROLL key to scroll through the parameters and their values.

  • Page 34: Service 5.1

    Service 5.1 This section contains information regarding calibration and test procedures that can be performed in the field as well as items concerning the normal maintenance of the instrument. Changing Charts 5.2 Chart changes may be done while in the normal operating mode. CAUTION: The chart flange assembly pin is sharp to perforate the chart.

  • Page 35: Calibration 5.4

    Calibration 5.4 CAUTION: Do not attempt any calibrations without the proper test equipment that meets or exceeds the specifications listed. To enter the calibration mode it must first be turned on in the Enable mode (page 25). Once enabled, press and release the SCROLL key until CAL appears on the display, then press the DOWN key to enter the mode.
  • Page 36 (Continued from page 35) Press the DOWN key, deLy will be displayed for 10 seconds and then SCAn for 10 seconds. When the calibration is complete CAL2 will reappear. CAL2 QUICK CALIBRATION This routine will allow the operator to execute a rough calibration on their unit via the keypad with no other equipment or disturbance to established wiring.

  • Page 37: Test Mode 5.5

    FOR INSTRUMENT WITH SOFTWARE REVISION R3.00 AND ABOVE: P.dn will be displayed while the selected pen is moved to it's "HOME" position (toward the chart hub) with the decimal point flashing to indicate this mode. Once "Pen Home" is found, the pen will move to the inner ring and PEnL will be displayed.
  • Page 38 5.5.1 TEST 1 INTERNAL RAM TEST Tests the Random Access Memory internal to the microprocessor. No special test equipment is required. With tSt1 displayed, press and hold the DOWN key, then press the SCROLL key. tSt1 will be displayed momentarily while the test is in progress. Upon successful completion, the instru- ment will proceed to Test 2.
  • Page 39 The meter should read 5 VDC when the SSR driver is on and 0 VDC when the driver is off. Press and release the DOWN key to advance through the following sequence: Display Relay ON SPST RELAY ON SPDT rLYA rLYb rLYC rLYd...

  • Page 40: Trouble-Shooting And Diagnostics 5.6

    Trouble-shooting and Diagnostics 5.6 This section consists of two columns. The first column is a list of some possible instrument conditions. The second column is a list of steps that should improve the condition. The steps should be performed in order until the condition improves or all the steps have been com- pleted.
  • Page 41 1. Turn off the instrument power, wait 5 seconds then Model Number Displayed re-apply the power. Verify that the number displayed during power up is during the power up sequence is the same as incorrect indicated on the label affixed to the platen. If the number displayed is incorrect, perform the following steps: a.
  • Page 42 (Continued from page 43) 4. Check the output(s) operation by performing Test 6 as described in the Test section (page 38). If the output(s) function(s) in the Test mode, re-examine the Program, Alarm Set and Preset mode parameter settings (pages 26 & 30 or Software Ref. Sheet, page 55, if already filled out).
  • Page 43 4. Refer to the Test section and carry out the procedure for the Current Output(s) Test 7 (page 39). If the current output operates properly in the Test mode, re-check the Program mode parameters (page 26 or Software Ref. Sheet, page 55) if already filled out). 1.
  • Page 44 1. Perform the steps listed for the SnSr Error Condition Hi - Input more than 10% Over Span (above). Lo - Input more than 10% 1. Perform the steps listed for the SnSr Error Condition Under Span (above). o - display overranged 1.
  • Page 45 Er8 - Cal2 Volt Input 1. Check that 100mVDC is properly connected to the Error instrument and is within the tolerance limts as indicated in the CAL2 procedure of the Calibration section (page 35). 2. Turn off the power to the instrument and open the cover.

  • Page 46: A - Board Layouts

    Appendix A Board Layout FIGURE A-1 - Processor Board ENABLE MODE SWI for Rev. Y and above UNLOCKED LOCKED RAM SIZE SWI for Rev. X and below MICRO 230/115 VAC SWITCH 230 VAC MODEL ONLY EPROM EPROM SIZE JU4 PEN 1 INPUT VOLT/mA Battery JU5 PEN 2 INPUT...

  • Page 47: A-2A Relay (Spst) Output Board

    FIGURE A-2A - Relay/SSR (SPST) Driver Output Board TS1 R1 TS5 R5 TS6 R6 C1 C2 If the relay is connected to a Resistor Relay high impedance AC device, the snubber network used to Relay A protect the relay contact may Relay B cause the output to appear Relay C...

  • Page 48: A-2B Relay (Spdt) Output Board

    FIGURE A-2B - Relay (SPDT) Output Board TS1 R1 TS5 R5 TS6 R6 C1 C2 If the relay is connected to a Resistor Relay high impedance AC device, the snubber network used to Relay A N.O protect the relay contact may Relay A N.C.

  • Page 49: Current Output Board

    FIGURE A-3 - Current Output Board TB12 TB13 TB10 TB11 If this option board was ordered, you will find it located in the lower right hand corner of the instrument.

  • Page 50: B - Glossary

    Appendix B Glossary Display Filter Factor This parameter is adjustable from 1 to 20 which represents the number of scans of the process variable that are averaged together before updating the displayed and recorded value, and process value for retransmission. The factory default is 1=no filtering. Display code dFF.
  • Page 51 Square Root Extraction Algorithms (Engineering Units Processing Algorithm) This parameter chooses the equation for processing the input from a transmitter or transducer. EuPA = 0 - Linear is for inputs that are directly proportional to flow (no square root extraction needed).

  • Page 52: C - Model Number Hardware Matrix Details

    Appendix C Order Matrix Pen and Totalization Option Suffix Selection Blank - None N3 - NEMA 3† 5 1 Pen Recorder 6 1 Pen Recorder with talization Voltage 7 2 Pen Recorder 1 115VAC Input 8 2 Pen Recorder with 2 115/230VAC Input talization 9 1 Pen Recorder with...

  • Page 53: D - Specifications

    Appendix D Specifications Measurement Error Limit mA, mV, and VDC +/- 0.25% of scaled span plus 1 Least Significant Digit @ 25 degrees C Ambient Temperature Error 0.01% of span per degree C deviation from 25 degrees C Scan Rate 1 to 5 scans/second (One pen units) 1 to 3 scans/second (Two pen units) Display Decimal Positions...
  • Page 54 INPUTS Milliamps Millivolts 4-20mADC 0 to 100mV (Can be scaled to any portion of this range) Volts 0 to 5VDC* 1 to 5VDC* *Volt inputs are accomodated by removal of a shunt resistor ALARM ADJUSTMENTS Process Alarm 0 to 9999 Hysteresis 0 to 1000 PROCESS VALUE OUTPUT...

  • Page 55: E - Software Record/Reference Sheet

    Appendix E Software Record/Reference Sheet PROGRAM MODE Pen 1 Pen 2 Pen 1 Pen 2 unit Pen 1 Pen 2 inPS SCnr iCor rLyA rLyb rLyC ENABLE MODE dPos rLyd EtSt EuPA rLyE ECAL Pu10 rLyF EPro Pi11 rLyg EASt Pu12 rLyH EdLS...
  • Page 57 These products are warranted to be free from functional defects in materials and workman- ship at the time the products leave the Partlow factory and to conform at that time to the specifications set forth in the relevant Partlow instruction manual or manuals, sheet or sheets, for such products for a period of three years.

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