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Summary of Contents for Megger PMM-1
- Page 1 User Manual Model PMM-1 ® POWER MULTIMETER It is essential that this instruction book be read thoroughly before putting the equipment in service! Part No. 17357 Rev. 14 Date 01/21/2011...
- Page 2 IMPORTANT The information and data contained within this instruction manual are proprietary with Megger®. The equipment described herein may be protected by one or more U.S. letters patent. Megger specifically reserves to itself all rights to such proprietary information as well as all rights under any such patent, none of which is waived by the submission of this instruction manual to anyone.
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Page 3: Table Of Contents
TABLE OF CONTENTS OPERATOR SAFETY ......................1 DESCRIPTION .......................1 EXPLANATION OF SAFETY SYMBOLS ...............1 GROUNDING .........................2 POWER CORD AND FUSES ..................2 GENERAL INFORMATION....................3 DESCRIPTION .......................3 APPLICATIONS......................3 ... - Page 4 TABLE 4-2 RS232 CONNECTOR PIN-OUT ..............36 POWER MULTIMETER COMMAND SET ................37 CALIBRATION PROCEDURES..................41 PMM-1 QUICK TIPS......................45 EXAMPLES ........................46 Power DB PROGRAM INSTRUCTIONS ................55 SERVICE AND MAINTENANCE..................63 ADDENDUM – USING PMM-1 FOR DELTA POWER MESAUREMENTS......63 ...
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Page 5: Operator Safety
Refer to the following sections of this manual for operating specifications and procedures. EXPLANATION OF SAFETY SYMBOLS Megger uses, where applicable, the following IEC 417 symbols on its instruments: This symbol indicates that the operator of the instrument must refer to the instruction manual for further explanation and clarification. -
Page 6: Grounding
The power cord must be connected to a grounded supply system with proper electrical ratings, as indicated on the instrument. In the case of detachable power cords, only the cord supplied or specified by Megger should be used. WARNING: TO AVOID ELECTRIC SHOCK ALWAYS DISCONNECT THE POWER CORD FROM THE SUPPLY CIRCUIT BEFORE SERVICING THE INSTRUMENT OR WHEN REPLACING A FUSE. -
Page 7: General Information
GENERAL INFORMATION DESCRIPTION The Megger POWER MULTIMETER (Model PMM-1) is a next generation portable battery/line operated multifunction instrument for measuring AC or DC voltage, AC primary and secondary current, power, reactive power, phase angle and frequency of a single or three phase electrical system. POWER MULTIMETER is easily configured to measure the amplitude and phase angle between any two voltage and current inputs. - Page 8 Customize C.T. ratio inputs up to a ratio of 9999:1 or 9999:5. • Customize P.T. ratio inputs up to a ratio of 9999:1 or 9999:5. • Megger Power DB Lite software to recover and print data. • Harmonic measurement of any selected voltage or current – up to the 49 harmonic.
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Page 9: Electrical Specifications
ELECTRICAL SPECIFICATIONS ∗ SPECIFICATIONS Input: Line: 90-253 V, 50/60 Hz, 30 VA Internal, sealed lead-acid, rechargeable battery with an internal automatic charger. Battery: Safety features include Internal battery over-charging and charge exhaustion protection. Operation Time: 10-Hour continuous on full charge. Voltage: 0 - 650 Volts (AC/DC) in 8 ranges, with 0.1% resolution. -
Page 10: Safety, Mechanical And Environmental Specifications
-30°C to 75°C (-22°F to 167°F) Relative Humidity: 10 to 95%, NON-CONDENSING ORDERING INFORMATION Cat. No. POWER MULTIMETER PMM-1 The instrument is shipped complete with: Line cord, three wire, 120V 6828 Instruction Manual 17357 (2) Fuses 1.0 A 250 V, 5 x 20 mm... -
Page 11: Changes
Megger's discretion, in the field. The customer shall prepay shipping charges for units returned to Megger, and Megger shall pay for the return of the required or replaced unit to the customer, repair or replace (at Megger's option) the unit or... -
Page 12: Installation
INSTALLATION UNPACKING AND INSPECTION Prior to shipment this instrument was electrically tested and mechanically inspected to meet specifications and be free of mechanical defects. After unpacking the instrument, visually inspect the instrument and accessories for damage. If evidence of damage is present, YOU must contact the carrier who transported the unit and file a claim in writing. -
Page 13: Operating Instructions
OPERATING INSTRUCTIONS PANEL CONTROLS AND OPERATING FUNCTIONS Refer to FIGURE 4-1. for the following panel controls. LINE INPUT SOCKET: This is the main input for the POWER MULTIMETER, and should be connected to a suitable line receptacle, using the provided line cord. The input socket also contains the protection fuse. - Page 14 FIGURE 4-1 FRONT PANEL OF THE POWER MULTIMETER VOLTAGE INPUTS: The single or polyphase voltages are connected to these binding posts, as labelled. CURRENT INPUTS: Three independent current circuits may be connected to these binding posts. The correct polarity, for the phase angle measurement purposes, is indicated by the red terminal and a grey dot.
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Page 15: Safety Considerations
USING THE INTERNAL BATTERY NOTE: If the PMM-1 has been in transient for more than a week, it is very important that the unit be given a full charge before being used in the battery operation mode. - Page 16 In order to prolong the life of the battery and ensure optimum performance, the following procedure should be observed: Charge the battery overnight after using the instrument for a short time or after a whole day. Charge the instrument at least once a month, if it is stored unused, store it connected to a power line.
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Page 17: General Operating Instructions
GENERAL OPERATING INSTRUCTIONS The following is a general procedure for operating the POWER MULTIMETER. NOTE: Due to the sensitivity of the Power Multimeter to very low levels of voltage and current, it is highly recommended that the protective ground terminal be connected to an earth ground and jumpered to the voltage input neutral post before making any measurements!!! This is recommended even if the AC power cord is used. -
Page 18: Selecting The Input Channel
4.5.1 SELECTING THE INPUT CHANNELS 1. From the Main Menu, press the SINGLE PHASE function key. The following should appear on the display. 2. From the single-phase screen, select the input channels required. The following quick selections are provided for convenience: Ia &... - Page 19 If inputs other than the ones listed above are required, press the CUSTOM INPUTS function key. The instrument will display the following: Use the SELECT INPUT 1 and SELECT INPUT 2 function keys to configure the measurements. Note that certain combinations of input 1 and 2 are not possible.
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Page 20: The Measuring Functions
4.5.2 THE MEASURING FUNCTIONS Anytime during the course of measurement, the serial and/or parallel (i.e., printer) transmission can be activated. In order to activate the transmission, make the appropriate connection to the PRINTER or RS232 device. Refer to section 4.13. for more details. Press the PRINT function key to initiate the transmission. -
Page 21: The Max Hold Feature
4.5.3 THE MAX HOLD FEATURE Pressing the MAX HOLD button in the Single-Phase Mode will result in the display of the selected single phase measuring screen. The PMM-1 will continuously monitor the selected inputs, and will display the highest value metered during the monitored period of time. -
Page 22: Three-Phase Operation
VIEW SAVED DATA. Pressing WYE MAX HOLD or DELTA MAX HOLD will display the desired three-phase MAX HOLD screen. The same single- phase feature applies to the three phase MAX HOLD function. THREE-PHASE OPERATION NOTE: Due to the sensitivity of the Power Multimeter to very low levels of voltage and current, it is highly recommended that the protective ground terminal be connected to an earth ground and jumpered to the voltage input neutral post before making any measurements!!!! -
Page 23: The Measuring Functions
4.6.2 THE MEASURING FUNCTIONS Anytime during the course of measurement, the serial and/or parallel (i.e., printer) transmission can be activated. In order to activate the transmission, make the appropriate connection to the PRINTER or RS232 device. Refer to section 4.13. for more details. Press the PRINT function key to initiate the transmission. -
Page 24: Clamp-On Current And Potential Transformer Operation
After making the changes, press the OK key. Please refer to section 4.7 if an external clamp-on current transformer is used. Pressing ESC function key, will return the user to the three-phase measurement screen. Phase A voltage input is taken as the reference for phase angle measurement. -
Page 25: Verifying The Ratios Of Cts
From the Main Menu, press the More function key. From the More screen, press the SetUp Page2 function key. From the SetUp Menu screen, press the ⇑ or ⇓ Arrow keys to cursor to the preset CT ratios or the Customized Option. Preset ratioes are: None or 1:1, 1000:5 (200-1), 3000-5 (600-1), 1000:1, 3000:1, Customized, CT and PT. - Page 26 From the Main Menu, press the SINGLE-PHASE function key. The following should appear on the display. From the single-phase screen, select IA & VAB, by pressing the corresponding function key. The measurement will be activated.
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Page 27: High-Speed Single-Phase Capture Mode
The instrument will default to automatic ranging. To change the measuring ranges proceed as follows: Press ESC function key. The SINGLE PHASE MODE will be recalled. Select HIGH SPEED CAPTR or go to TIMER MODE and follow the same procedures as previously described in the manual. -
Page 28: The Measuring Functions
CAPTURE MODES: Two capture modes are available: AFTER-START: in this mode a maximum of 60 seconds/1200 samples of data can be captured after the measurement is initiated. Use the START inputs to initiate the measurement. The measurement will automatically abort 60-seconds after it is started. Other measurement options are: 15 seconds/300 samples and seconds/600 samples. - Page 29 Press the START and STOP TRIGR function keys to highlight and select the configuration desired. To enter the new configuration and return to the previous screen, press the OK function key. Pressing the CAPTR MODE function key will change the capture mode from AFTER-START to BEFORE-STOP and vice versa, as previously explained.
- Page 30 Select CHANGE I & V RANGE. Press CHANGE I RNG to set the current range desired. Press CHANGE V RNG to set the voltage range desired. To enter the new configuration and return to the previous screen, press the OK function key. Once all the connections to the instrument are made, press the ARM function key to arm the capture circuitry.
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Page 31: Timer/Relay Operation
In order to activate the transmission of the captured data to an external printer or PC, make the appropriate connection to the PRINTER and RS232 terminals. Refer to section 4.13. for more details. Press the PRINT function key to initiate the transmission. All pages of captured data will be transmitted. -
Page 32: The Measuring Functions
4.9.2 THE MEASURING FUNCTIONS From the Main Menu, press the TIMER function key. Select the mode of operation, as described in the previous section, using the appropriate function key. TIMER is the default mode. The instrument defaults to VAN and Ia. Manual ranging is also available for this mode of operation. -
Page 33: View Saved Data Directory
voltage. The input terminals are isolated from the chassis ground and are independent of signal polarity. To reset the meter, press RESET. Press the SAVE function key to save the content of the display. Pressing this key will TAG NUMBER the sub-screen. This information then will be saved in the SAVED DATA DIRECTORY. -
Page 34: Timed Data Transmission
The interval is programmable from 1 to 60 minutes. For instance, if a 5 minute interval is selected, the operator can connect the PMM-1 to a printer, enable the print function and print the measured data every 5 minutes. The following example details the programming of this function:... - Page 35 To send data from the printer parallel port proceed as follows: From the Main Menu screen select the More function key. Then select the SetUp Page1 function key to bring up the System SetUp Menu. Use the F1 function key to select either print data once or print data at interval. If the print data once is selected, the user must press the Print function key once to initiate the data/measured readings out to a printer.
- Page 36 To Save data directly to the NOV ram, at a set time interval proceed as follows: It is highly recommended that the NOV ram be cleared of all data if possible, this is to allow maximum use of the unit’s ram memory (28,672 BYTES). Refer to page 30 of the instruction manual for number of bytes each test uses.
- Page 37 The figure above is the Harmonic Analysis screen, to call up the screen press the following function keys. From the Main Menu press the More key then select the Harm function key, the analysis screen will be displayed. The Harmonic Screen measures the percentage (%) of fundamental for Va, Vb, Vc, IA, IB, IC.
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Page 38: Setting The Clock And Date
4.12. SETTING THE CLOCK AND DATE The POWER MULTIMETER is equipped with an internal real-time clock and date, used to stamp the saved data. In order to change the clock and/or date settings proceed as follows: From the Main Menu, press the MORE function key. Select SETUP PAGE1 from the second menu. -
Page 39: Rs232 Serial Data Port
Next, using the up ⇑ and down ⇓ arrow keys, increase or decrease the desired time of interval transmission (1 to 60 minutes). After completion of the time interval setting, press the OK function key to initalize the changes. The unit will begin to transmit the measured data to the external device at the set interval time. -
Page 40: Table 4-2 Rs232 Connector Pin-Out
The pin out of the 9-pin delta plug is shown in TABLE 4-2.. Please note the data transmission is unidirectional TABLE 4-2. RS232 CONNECTOR PIN-OUT PIN NUMBER DESIGNATION FUNCTION Transmit Data Receive Data Signal Ground Clear To Send Request To Send Other pins are not used. -
Page 41: Power Multimeter Command Set
• Flow Control None To set up Hyper Terminal to communicate with the PMM-1 do the following: • Locate Hyper Terminal and open the file. • Open any ht file, A T & T mail ht, MCI mail ht, etc. - Page 42 • Hyper terminal should now be ready to communicate to the PMM-1. • Type in: m1; to change the PMM-1 screen from the main menu to the single-phase screen. • Note: commands to the PMM-1 may require double entry before being accepted.
- Page 43 Setup commands Single Phase custom input selection read: slpcustomr; sends channel 1 and 2 input source selections ( chan1=0, chan2=6 ) in 0-8 integer format. 0=Van, 1=Vbn, 2=Vcn, 3=Vab, 4=Vbc, 5=Vca, 6=Ia, 7=Ib, 8=Ic. See Single Phase, pg 15. Single Phase custom input selection write: slpcustomw,m,n;...
- Page 44 Change Start and Stop trigger sources for timer and hi-speed striggerw,K,L; capture modes: works in any mode yet applies only to timer and hi-speed capture modes. K=start setting, L=stop setting: 0 for normally open contacts, latch off* 100 for normally open contacts, latch on* 1 for normally closed contacts, latch 101 for normally closed contacts, latch on* off*...
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Page 45: Calibration Procedures
3phase: A_volts,B_volts,C_volts,A_amps,B_amps,C_amps A_watts,B_watts,C_watts,A_vars,B_vars,C_vars ph_Va_ref,ph_Vb_ref,ph_Vc_ref ph_Ia_ref,ph_Ib_ref,ph_Ic_ref A_pwrfact,B_pwrfact,C_pwrfact,freq timer: status,time_count,A_volts,A_amps,freq hi speed capture: ( all modes ) one line per sample sample#,phase i.d.( A,B,C or S ), chan1, chan2,phase (chan1 to chan2),watts,vars query time: sends time query date: sends date Calibration Correction Factors: correction factor read: cfr,m;... - Page 46 Inject a source ( voltage or current ) into the phase or phases in question. Record both readings from the Standard / Reference source and the Power Multimeter. Use the % error formula to determine how much error the range in question is out of tolerance.
- Page 47 Example: Correction factor = [ ( Standard reading / Measured ( PMM1 ) reading - 1 ] x 1,000,000 3.00000 / 2.99811 - 1 x 1,000,000 = 630.397, the new correction factor to be entered is a positive 630. Enter cfw, 0, 630; then update by typing cfu; . Inject the same source and verify that the correction factor has brought the range in question back into tolerance.
- Page 48 THREE PHASE WYE: Three Phase Wye screen: m3y; query the readings: Three Phase mode phase angle reference source selection read: s3pphrefr; sends ( phref = 0 ) in 0-5 integer format. 0=Va, 1=Vb, 2=Vc, 3=Ia, 4=Ib, 5=Ic Three Phase mode phase angle reference source selection write: s3pphrefw,1;...
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Page 49: Pmm-1 Quick Tips
PMM-1 QUICK TIPS • If the PMM-1 has been in transient for more than a week, it is very important that the unit be given a full charge before being used in the battery operation mode. • To adjust the screen contrast, press the More function key and use the Less or More contrast function keys to set the screen contrast. -
Page 50: Examples
• To communicate through the RS-232 port using windows terminal, hyper terminal or ProComm the following settings are required: bits per second-19,200, data bits-8, parity-none, stop bits-1, and flow control-none. EXAMPLES... - Page 51 To make a Single Phase, IA and VAB measurement press the following function keys. Single Phase and IA and VAB, the following screen will be displayed.
- Page 52 To select another Single Phase configuration press ESC to return to the Single Phase Menu. In this screen the user can use the Custom Inputs to set up the desired measurements. The Single Phase Menu also gives you the option of doing a High Speed Capture measurement on the selected inputs.
- Page 53 The Trigger Source Menu allows the user the flexibility to set up the Start and Stop trigger to the desired configuration, that being NO contacts, NC contacts, Voltage Applied or Voltage Removed. After making the desired selections press the OK function key to initialize the new configuration and return to the High Speed Capture screen.
- Page 54 then it must be noted that the resultant values will be considerably off. It is highly recommended that the ranges selected be at least two ranges above the expected amplitude or simply just leave it in the defaulted ranges. In this screen press the Change I RNG or V RNG function keys to move through the different ranges.
- Page 55 The Three Phase Wye screen has numerous function keys that allows the user to select for each particular measurement. • Volts-selection of RMS or AVG mode measurement. • Print -send measured data to a Parallel Printer. • Save -save each measurement to the Saved Data Directory. •...
- Page 56 If a High Speed measurement is desired while in the Three Phase Wye or Three Phase Delta just simply press the High Speed Capture function key and the following screen will be displayed. The High Speed Capture screen has numerous function key options that allows the user to make before conducting the high speed measurement.
- Page 57 After numerous measurements have been saved and the data is needed for review or be extracted to a parallel printer or RS-232 device, simply return to the Main Menu and press the View Saved Data function key and the following screen will be displayed. The Save Data Screen has numerous function key options.
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Page 59: Power Db Program Instructions
Power DB PROGRAM INSTRUCTIONS Instructions for installing the Power DBLite program for use with the Megger Power Multimeter Model PMM-1. Computer System Requirements: ® Operating System: Microsoft Windows 2000/XP; minimum 300 MHz PC; minimum 64 MB RAM; CD ROM drive; mouse Installation from CD 1. - Page 60 The following are brief explanations of the PMM-1 Power DB user screens and in no way is intended to be a tutorial on the Power DB Lite program. If more detail operating instructions is required please refer to the Power DB instruction manual. Some knowledge of Power DB is required to generate reports.
- Page 61 Enter the COM port from the Pull Down window, click on OK. 1 PH Scan 1. Power DB Lite will automatically open the PMM-1 Single Phase test screen. Use the Zoom button or select Tools, Zoom Out to reduce the form, see an example reduced form in the following figure.
- Page 62 Use the up ⇑ or ⇓ down arrow keys to move the cursor to the desired file. Press the VIEW ITEM function key to recall, display and verify the data on the PMM-1. To extract the data from the PMM-1 to the Power DB Lite software, mouse click on the Retrieve Saved Data hot key.
- Page 63 1. To run Multi-Scan the user will need to set the START DATE, START TIME, STOP DATE, and STOP TIME. The PMM-1 will start recording based upon the SCAN RATE at the START DATE and START TIME, and will stop recording at the STOP DATE and STOP TIME.
- Page 64 Power Multimeter. To retrieve the file, press the PMM-1 View Saved Data function key. Use the up ⇑ or down ⇓ arrow keys to locate the desired hsc 1pS file, then press the View Item function key to recall and display the data.
- Page 65 Use the up ⇑ or ⇓ down arrow keys to move the cursor to the desired file. Press the VIEW ITEM function key to recall, display and verify the data on the PMM-1. To extract the data from the PMM-1 to the Power DB Lite software, mouse click on the Retrieve Saved Data hot key.
- Page 66 Power Multimeter. To retrieve the file, press the PMM-1 View Saved Data function key. Use the up ⇑ or down ⇓ arrow keys to locate the desired hsc 3pM file, then press the View Item function key to recall and display the data.
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Page 67: Service And Maintenance
Due to the fact that the PMM-1 does not have a specific preset measurement mode for performing power measurements using a two watt meter method, the following procedure is set forth for that purpose. - Page 68 By selecting the C phase voltage as the reference, and tying it to the neutral binding post of the PMM-1, a 3 phase wye (ie. line to neutral) measurement mode can effectively be reconfigured for line to line measurements.
- Page 69 When adding the power factor values for each of the two legs of the circuit being measured, the sum must be divided by √3. The PMM-1 only displays the individual power factor values for each individual voltage and current being measured. Therefore, a system power factor can be calculated by adding the power factors for each of the two legs in the system and then dividing their sum by √3...
- Page 70 For example: If the power factor of each of the two legs were Cos 30˚, then: = √3/2 = 0.866 = √3/2 = 0.866 Load Power Factor can now be represented in terms of these two components Load PF = + PF = 0.866 + 0.866 = 1 = Cos θ...
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