Informations de l’équipement

Holaday Industries Inc. HI-3637 Indicateur de niveau
Fabricant:
Holaday Industries Inc.
Modèle: HI-3637
Date: 1993
Catégorie: Mètres
Groupe: Indicateur de niveau
Description: VLF Magnetic Field Meter
Informations:

The HI-3637 VLF (very-low frequency) Magnetic Field Meter measures magnetic field flux density in the frequency range of 2 kHz to 400 kHz. The capabilities of this instrument are designed to conform to the guidelines issued recently in Sweden—as well as the IEEE P-1140 protocol—for measuring VLF magnetic fields produced by video display terminals (VDTs). Applications for this versatile meter range from VDTs and computer monitors to high current factory locations. The HI-3637 is a self-contained three-axis flux density meter designed to respond to either sinusoidal or complex magnetic field waveforms, such as those produced by the vertical deflection system of a VDT. The meter circuit utilizes a microprocessor to continually compute the root-mean-square (RMS) value of magnetic field flux density and display it directly on an analog meter, allowing quick assessment of the actual flux density value. The size of the instrumentation/readout package was chosen for two reasons. The first is to allow for two layers of electric and magnetic shielding in addition to the outer housing. The second is to allow for hand held operation. This portability makes the HI-3637 particularly useful in surveying the magnetic field flux density distribution over a large area in a short amount of time. The Probe Sensor array consists of three mutually orthogonal multi-turn loops connected to the instrumentation/readout package via a 1.5 meter cable. Readings are independent of Probe orientation. The Probe is electrically shielded, making the HI-3637 immune to most electric field effects. The HI-3637 has a wide dynamic measurement range: 4 nT to 400 ¿iT (100 dB). This makes the HI-3637 convenient for finding VLF magnetic field distributions in any application. The supplied alternate panel label converts the meter scale to Gauss (0.04 mG to 4 G). The optional XI00 Probe shifts the measurement range to 400 nT to 40 mT (6 mG to 400 G). An optional kit converts the HI-3637 to indicate fields in field strength units of amps/meter (A/m).

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Type manuel: Manuel de l'utilisateur Holaday-8750-Manual-Page-1-Picture
Pages: 52
Taille: 5.08 Mbytes (5326142 Bytes)
Langue: Anglais
Révision:
Numéro d’identification: 600055
Date: 01 septembre 1993
Qualité: Document scanné, tous les lisible.
Télécharger date:
MD5: 74b444d101588deac64ac5bb0ba3cd4d
Téléchargements: 62 depuis 04 février 2017
Informations:

1.0 DESCRIPTION ... 1 2.0 SPECIFICATIONS ... 3 3.0 ACCEPTANCE AND CONTROLS ... 7 Introduction ... 7 Unpacking and Acceptance ... 7 Battery ... 7 Battery Charger ... 7 Controls, Indicators and Connectors ... 9 Recorder Output ... 10 Low Battery Indication . . ... 12 4.0 BATTERY CHARGING ... 13 Introduction ... 13 Battery Tips ... 13 Charging Procedure ... 14 Charging Considerations ... 14 Battery Replacement ... 15 5.0 MAINTENANCE ... 17 Introduction ... 17 Maintenance Recommendations ... 17 Return Procedures ... 17 Periodic/Preventive Maintenance ... 18 Parts Information ... 19 6.0 MAKING MEASUREMENTS ... 21 Quick Start ... 21 Description ... 22 7.0 THEORY OF OPERATION ... 23 Introduction ... 23 Probe ... 23 Range Select ... 23 Pre-filter Section ... 23 Integrator Section ... 25 Post-filter Section ... 25 RMS Calculation ... 25 Power supply ... 25 8.0 CALIBRATION ... 27 9.0 REFERENCES ... 29 APPENDIX A VIDEO DISPLAY TERMINALS (VDTs) ... 29 VDT CHARACTERISTICS ... 29 General Description ... 29 Principles of Operation ... 29 Modulated DC Fields ... 30 60/50 Hz Fields ... 31 Deflection System Fields ... 31 Broadband RF Fields ... 32 CHARACTERIZING VDT EMISSIONS AND OPERATOR EXPOSURE ... 33 Introduction ... 33 Characterizing VDT Emissions ... 33 GUIDELINES FOR RF EXPOSURE ... 35

Holaday-8750-Manual-Page-1-Picture


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