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HI-3604

ELF Survey Meter

User's Manual

1992 Holaday Ind. Inc.

Manual #600043B 6/97

$12.50

Содержание HI-3604

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Страница 3: ...Revision Record Manual 600043 HI 3604 Survey Meter Revision Description Date Release 8 92 A New LCD 12 92 B Added CE Label 6 97 ...

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Страница 5: ...eld Mode Selection 13 Keypad Inputs 14 Keypad Matrix 14 4 0 POWER FREQUENCY FIELDS 19 5 0 EXAMPLE APPLICATIONS 23 Field Strength Measurements 23 Waveform Measurements 26 Frequency Measurements 30 6 0 MAINTENANCE 31 Battery Replacement 31 7 0 USING THE HI 3616 FIBER OPTIC REMOTE CONTROL 33 Turn on Procedure When Using the HI 3616 33 ...

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Страница 7: ... PROVIDED BEFORE WORK IS STARTED IF REQUESTED BY THE PURCHASER FOR WARRANTY SERVICE CONTACT HOLADAY INDUSTRIES INC GIVING FULL DETAILS OF THE FAILURE AND THE SERIAL NUMBER OF THE INSTRUMENT YOU WILL THEN BE GIVEN SERVICE INFORMATION OR SHIPPING INSTRUCTIONS RETURN THE INSTRUMENT TO THE FACTORY TRANSPORTATION PREPAID REPAIRS WILL BE MADE AT THE FACTORY AND THE INSTRUMENT RETURNED TO YOU TRANSPORTAT...

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Страница 9: ...tic fields see Figure 1 1 The instruments capabilities include datalogging waveform output full auto ranging and a custom Liquid Crystal Display LCD with a bar graph as standard features All selection and control functions are input from a front panel membrane switch pad True RMS detection assures accurate measurements of complex waveforms The waveform output jack allows observation and evaluation...

Страница 10: ...he magnetic field the HI 3604 employs electronic compensation circuitry which results in a tailored frequency response that is flat in the frequency range of importance to power frequency measurements This feature permits the HI 3604 to be used in environments having significant harmonic content and yield accurate measures of the resultant fields Broadband response is required when measuring field...

Страница 11: ...HI 3604 Manual Page 3 Figure 1 1 HI 3604 ELF Field Strength Measurement System ...

Страница 12: ...Page 4 HI 3604 Manual ...

Страница 13: ...tures All function and range selection changes are made by use of the membrane switch keypads on the front panel Internal electronic range switching allows full auto ranging on either the Electric or Magnetic field functions Max hold feature stores and displays highest reading Amplitude Response True RMS field strength measurement for accurate measurement of non sinusoidal waveforms Polarization R...

Страница 14: ...ell MN1604 or equal Output Liquid crystal display preamplifier output via phono jack analog signal from sensor preamplifier equal to 1 mV mA m digital fiber optic signal for remote reading via connection to HI 3616 Fiber Optic Remote Control Frequency Response HI 3604 Magnetic Field Response ...

Страница 15: ...m for creating a known electric field strength In the case of the Helmholtz coils a precisely controlled and measured sinusoidal current is driven through the coils and based on the dimensions of the coils the magnetic field strength in units of milligauss mG is calculated For electric fields a sinusoidal voltage impressed across the two parallel plate electrodes is directly measured and used to c...

Страница 16: ...or electric and magnetic field strength The HI 3604 is designed to provide a flat response over the range of frequencies corresponding to the 50 or 60 Hz power line frequency and the first several harmonics The tailored low frequency characteristic to the response helps reduce magnetic field response to movement of the sensor in the earth s constant magnetic field The bandwidth of the true RMS det...

Страница 17: ... 3604 Manual Page 9 module This signal is available from the phone jack located at the bottom of the instrument Connection of an oscilloscope to this jack will allow observation of the preamplifier output ...

Страница 18: ...Page 10 HI 3604 Manual ...

Страница 19: ...ration The switch keypads are activated by gently pressing on the center of the pad with a finger tip Do not use hard or pointed objects to operate the switch keypads Turn the unit ON the default measurement condition is Magnetic Fields The custom LCD readout displays the units of measure in addition to the observed value A Bargraph display is provided along the top of the LCD window This display ...

Страница 20: ...Page 12 HI 3604 Manual Figure 3 1 HI 3604 ELF Survey Meter ...

Страница 21: ...es not affect the accuracy of the instrument The battery condition is indicated by a small battery symbol in the lower left corner of the LCD As the battery voltage decreases the low battery symbol begins to blink If the battery condition is allowed to drop below that necessary for proper operation the display will go blank Digital Display The HI 3604 uses a custom Liquid Crystal Display to provid...

Страница 22: ...ill immediately show the measured field strength Keypad Matrix For maximum flexibility in operation the HI 3604 has a keyboard matrix for the upper three keypads on the membrane switch panel The function of each of the three keys can be changed depending on the location of the CURSOR block in the LCD display The cursor block is a dark rectangle located at the bottom edge of the LCD display On turn...

Страница 23: ...gh the H field units of measure Refer to the descriptions of the E H and MAX keypads for further details When the settings are adjusted to the desired values again press the MODE SELECT keypad to leave the setup mode and begin normal measurement operation The operational description of the various functions is as follows SCALE The SCALE keypad changes the fixed ranges or scales of the instrument W...

Страница 24: ...lay will show all segments lit When all the segments are lit press and hold the MODE SELECT keypad to enter the display setup mode Hold the MODE SELECT keypad until the display reads F and the current H field unit of measure Press the MAX keypad to scroll through the available units Once the desired units are selected press the MODE SELECT keypad to save the current setup leave the setup mode and ...

Страница 25: ...ement The display response setting does not affect the accuracy of the instrument BATT The BATT keypad displays the supply battery voltage along with the battery symbol The low battery indication will begin to flash at about 7 5 volts When the battery voltage drops to 7 25 volts the display will blank with only the BATT symbol displayed and the batteries must be replaced DISP 3 4 Pressing the DISP...

Страница 26: ...splayed value down towards the beginning of the memory value identification 1 If the PREV key is operated while viewing value 1 the identification value will wrap around to the highest stored identification number NEXT Pressing the NEXT key displays the next value in the data logging memory If the NEXT key is operated while viewing the last stored value the identification number will wrap around t...

Страница 27: ...ure 4 1 This figure illustrates a single circuit three phase power line consisting of three separate electrical conductors each having an impressed voltage which is 120 degrees out of phase with its neighboring conductors A shield wire may be present above the three phases of the line this wire which is grounded acts as a preferred point for lightning strikes which could if unprotected strike the ...

Страница 28: ...inima in the fields Thus power line fields can have rather complex spatial distributions about the line Figure 4 2 illustrates this field distribution for a typical 345 kV transmission line carrying 1000 A In this figure the field strengths have been computed for a height of one meter above the ground from one side of the line to the other In addition to the normal variation in field strength whic...

Страница 29: ...ion components of the field to assess the resultant electric fields at points above the earth Figure 4 2 indicates that the maximum electric field strength beneath the 345 kV line is expected to be about 3 4 kV m The maximum magnetic field strength will be dependent on the magnitude of current flowing in the line Figure 4 2 represents the magnetic fields if the line was carrying a current of 1000 ...

Страница 30: ...Page 22 HI 3604 Manual ...

Страница 31: ...tly enlarged field collecting surface for the displacement current sensor resulting in an erroneously high indicated field strength In addition the presence of the operator s body will tend to perturb the electric field that is being measured The operator should remain approximately one to two times their height away from the HI 3604 and observe the readings via the use of the HI 3616 Fiber Optic ...

Страница 32: ...the body can lead to either enhanced electric field strength readings or reduced readings when compared to the true unperturbed field strength While in some cases it may be desirable to determine the enhanced fields near objects in general most field measurements should be directed toward assessing the unperturbed values Unperturbed field strengths for example or so called free space values are mo...

Страница 33: ...nt is parallel to the conductors of the power line This orientation is necessary to reduce any instrument response to any horizontal component of the electric field caused by the asymmetric physical shape of the HI 3604 Figure 5 2 illustrates the correct orientation of the instrument relative to the power line conductors Orientation of HI 3604 for Measurement of Vertical Electric Field Strength Be...

Страница 34: ... picture of the waveform of the same light bulb magnetic field except that a light dimmer has been introduced to the power supply to the light bulb In this case the dimmer has been adjusted to approximately half brilliance and the chopping action of the dimmer is clearly shown Through a chopping of the waveform less power is delivered to the bulb resulting in a lower light level Figure 5 5 represe...

Страница 35: ...hing the bottom The peak to peak output in millivolts from the waveform jack is nominally related to the observed field as follows Electric Field Range full scale Max Output nominal 19 99 volts 20 millivolts 199 9 volts 200 millivolts 1 999 kilovolts 2 volts 19 99 kilovolts 200 millivolts 199 9 kilovolts 2 volts Magnetic Field milligauss Range 10 mV milligauss Gauss Range 100 mV Gauss Refer to Sec...

Страница 36: ...ght bulb obtained by use of an oscilloscope connected to the analog output jack on the HI 3604 Figure 5 4 Waveform of magnetic field produced by an incandescent light bulb operated by a light dimmer at half brilliance obtained by use of an oscilloscope connected to the analog output jack on the HI 3604 ...

Страница 37: ...ure 5 5 Waveform of current supplied by a light dimmer Figure 5 6 Waveform of magnetic field produced by the vertical deflection circuit in a VDT obtained by monitoring the output from the analog output jack with an oscilloscope ...

Страница 38: ...the applied magnetic field To perform this measurement a portable digital multimeter DVM capable of measuring frequency maybe used with the HI 3604 to for example determine the vertical refresh rate on a VDT To perform this measurement an analog signal sufficient to drive some frequency counters may require that the HI 3604 be placed in fairly strong field ...

Страница 39: ... is removed Replace with 9 volt alkaline NEDA 1604A Duracell MN1604 or equal being careful to observe proper polarity of each battery refer to the label on the bottom of the readout module case for proper orientation of the batteries When viewing the back side of the HI 3604 the batteries go in with the positive terminal facing to the left The batteries are inserted with the battery terminals poin...

Страница 40: ...Page 32 HI 3604 Manual ...

Страница 41: ... a signal or command from the HI 3616 In this manner it is saving power by not having to use its fiber optic transmitter unless actually communicating with the HI 3616 When turned on the HI 3616 is programmed to send out short information request commands When such a command is received by the HI 3604 it responds and sends data The communications between the HI 3604 and the HI 3616 are bidirection...

Страница 42: ...served on the display of the HI 3616 When characterizing exposure the HI 3604 may be positioned at various locations without interference from the instrument user surveyor When not in use the HI 3616 should be turned OFF Refer to the maintenance instructions in section 6 0 regarding removal of batteries when the instrument will not be used for long periods of time Using the Recorder Output The HI ...

Страница 43: ...HI 3604 Manual Page 35 NOTES ...

Страница 44: ...Page 36 HI 3604 Manual NOTES ...

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