Ex Electrostatic Table (Static Tester)

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Model: W289065 I. OVERVIEW Ex-EST101 electrostatic voltage meter is absorbed in the domestic and foreign advanced static instrument on the basis of the masses of users for more than 10 years to improve the use of many new and high-performance, low-cost electrostatic voltage meter (electrostatic potential). Ex good performance of the instrument, explosions mark for Eia Ⅱ CT6. In all types of explosive gases (such as gasoline, carbon disulfide, city gas, ethylene, acetylene, hydrogen, benzene, etc.) use. Explosion-proof test passes, explosion-proof certification code: CJEx02.4.031. The electrostatic voltage at home and abroad on whether the contact list of detected objects can be divided into contact and non-contact two electrostatic voltage meter. As contact electrostatic voltage meter measurements of detected objects will contact discharge, the process of measuring the risk of ignition discharge exist, can not be used in dangerous places, and some foreign standards in the dangerous places on the prohibition of the use of contactless electrostatic voltage meter. There are many domestic and international non-contact electrostatic voltage meter, but some are not explosion-proof, and can not be used in the explosive dangerous places. Some of the probe designed to be unreasonable, its bare metal part directly, and some do not even have protection measures, so that if the measurement accidental contact with the detected objects, the discharge may occur, it is possible for the accident. We studied many domestic and foreign non-contact form of electrostatic voltage on the basis of design of the "anti-discharge - self-protecting" the new probe, developed EST101 Ex-voltage electrostatic table, the table probe placed crust, and metal probe lateral insulation protection layer, such a discharge be reduced to the minimum and reduces the probability of the strength of the discharge, and instrument itself will not be subject to external static (such as human touch probe) damage. Ex-EST101 electrostatic voltage meter blast at home and abroad as the best performance of electrostatic voltage meter has been made relevant departments of the state explosion-proof certification, any explosive gases in the environment. The Instrument applies to ammunition, EED, petroleum, chemicals, textiles, paper, rubber, printing, computer and other industries in the research and production of electrostatic measurement The measurement instrumentation applicable to the electrostatic voltage charged objects (potential), such as conductors, insulators, and the human body, such as the electrostatic potential. Could also measure surface potential and performance of Static Control. Widely used in petroleum, chemical, oil depots, fire protection, electronics, defense, aerospace, gas, printing, textiles, dyeing and printing, rubber, plastic, painting, medicine, scientific research, production, storage and transport safety management in the electrostatic measurements. Electrostatic Detection scene is the ideal instrument. 2. Characteristics Various types of explosive gases in the environment of use, good performance blast, explosions mark for Exia Ⅱ CT6,. Ex certification code: CJEx02.4.031. Figures show that the higher resolution. Maintain a reading function. Facilitate accurate readings. Non-contact measurement, the measured impact on small objects Measurement accuracy rapidly. Measurement rate of about 3 / sec. Small size, light weight, easy to carry. Power province, a battery can be up to 200 hours of continuous work, or interrupted about one year. A battery voltage, to ensure accurate measurements. The use of large-scale integrated circuits, high reliability. Use a wide range of easy-to-use. Battery automatic shutdown, saving battery (July 2007 after the new increase this feature) Third, the main technical indicators 1. Intrinsic safety explosion-proof type, explosions signs: Exia Ⅱ CT6. 2. Non-contact measurement. Input impedance> 1016 Ω. 3. Measuring range: ± 30V to ± 80KV. 4. Measurement error: <± 10%. 5. Show: 3 1 / 2 LCD, polar Show Ultra-range, battery voltage display. 6. Maintain a reading function. 7. Use of the environment: Temperature 0 ℃ to 40 ℃, relative humidity less than 80%. 8. Power: 6 F22-9 V battery of a plot, the power consumption is less than 15 mW. A battery generally for one year. Automatic shutdown battery power saving features (in July 2007 after the new increase this feature) 9. Instrument size and quality: 120mm × 70mm × 32 mm, 0.2 kg (including batteries). Fourth, a typical application and measurement principles Measurement of Surface Potential 4.1 Cleared with the boot Far away from the measured object (preferably away from the measured object 1 meter above) or potential zero (such as grounding or on the ground near the metal body) will be the power switch ON income into the location of this show that value should be zero or close to zero (the best figures at the end of not more than 3]. not zero, will switch back to the OFF position (cleared with the shutdown in the same position, slightly forward when used for pushing people) and then dialling back ON position. The digital instrument sensitivity and resolution higher than the target instrument, and vulnerable to static electricity around the impact of live operators, press button after tests showed that sometimes not as "000" and a Mantissa "?", But its measurement errors can be ignored. If the request for more accurate measurements, the measurement readings can be deducted from the initial reading. Measurement and reading Instrumentation will be moved from far to near objects measured from a distance of 10 cm (from the front of the groove instrument of measurement distance) read instrument readings, in units of kilovolts (kV). When detected objects of potential changes in the readings have changed, in order to facilitate reading, "keep reading" switch? Maintaining the same readings can be moved to facilitate the instrument readings of the readings. Songshou instrument will automatically resume after the show. Performance testing Static Control 4.2 Use this table can rapidly detect the performance of some of Static Control. With nylon or plastic film to be friction of the textiles (such as uniforms, fabric), floors, carpets, tables, boxes, foam, plastic boxes, and other components of the surface with EST101 Ex electrostatic voltage measurement table objects to be detected on the surface Potential, if the lower surface potential (or decline sooner), the better the performance of its anti-static, anti-static properties or bad. 4.3 contact measurement Add a circular plate electrodes, which can contact measurement object potential. Using contactless measurement can be measured conductor, the human potential and measurement of the oil potential (the need to increase more support annex, and the operator would have to be very experienced to reduce errors), the measurement of the oil potential, with a strong recommendation contacts Measuring electrostatic of full compliance with national standards EST202 of potential oil system. In a longer period of time measurement (such as measurement of potential oil), the instrument itself will affect the drift on the accurate measurement, then one can read the meter readings will remove the circular electrode plate 1 m to distant - zero after the next measurement. Cleared before each measurement for each measurement relatively short time, its drift to a small, the results of many such measurements can be a very long process of describing a slow change but the potential curve. 4.4 measuring principle The sensor uses a capacitive sensor instrumentation probe (the probe Instrument instrument in the front of the instrument into an integrated entity], using capacitive pressure principle, the high input impedance amplifiers and A / D converters, and so on, from the liquid crystal display of detected objects of electrostatic voltage, in Figure 1 show. order to ensure an accurate reading, the instrument with battery voltage readings show circuit as well as to maintain such circuits. 5, pay attention to matters 1, when the show "LOBAT" symbol, the battery should be replaced. The instrument is in power, intermittent use of a general-year battery can be replaced. Replacement of batteries in the security forum, open the battery cover can replace the battery. The instrument used a 6 F22-9 V battery. Long-term use of instruments should remove the battery. 2, when the fault, please contact the maintenance department and the factory for repairs. Do not self-demolition, so as not to affect performance instrumentation blast. This table warranty period of 24 months, if found in the warranty period fault free factory repair or replacement. 3, in order to save battery, in July 2007, an increase from the improvement of the automatic battery shutdown to prevent the shutdown will forget the battery is depleted, but can also reduce the impact of drift. 6, instrumentation proofing The high voltage power supply, standard electrode plate (φ = 60 cm) and accuracy better than 1% of the contact by electrostatic voltage meter connection icon. Will be validated fixed electrostatic voltage meter and electrode probe makes its distance of 10 cm, high voltage power supply voltage adjustment to record the standard static voltage meter readings to be corrected V1 and electrostatic voltage meter readings V2. As this instrument display is linear, even with the other electrode (such as the diameter is not φ = 60 cm, or the shape of the electrode is not flat), the only difference between the instrument readings a factor k = V1/V2, this factor will be calculated measurement readings can be multiplied by the coefficient k accurately measure other forms (such as tubes, wires or plane, etc.), different sizes and different distances by measuring objects on the surface voltage (potential), the electric field strength by checking if they would be able to in the electrostatic field strength measurement E. According to proofread the surface charge density can be measured objects on the surface charge density σ. Electrostatic Voltmeter proofing methods * Use a diameter of 60 cm circular plate electrode proofreading, testing distance of 10 cm.

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