FEITA FMX-004 fieldmeter is a non-contact and compact electrostatic fieldmeter used for locating and measuring static charges value of objects surface, and the ion balance of electrostatic eliminating equipment. Its pocket size and three-button operation makes it convenient and easy to use. Model FMX-004 can correctly measure static voltages within 30 kV (30,000V) range at a distance of 1” (25 mm). Two LED guide ring lights are provided on the sensor side of the unit to help position the instrument at the right distance from a charged object. The conductive case and ground lead facilitate grounding for proper measurement. Whenever the MODE button is pushed, the measurement mode is revocable. Model FMX-004 can be used for static voltage as well as Ion Balance voltage measurements. By attaching the Ion Balance charge plate to the top of the unit then pushing the blue button marked IB, the unit will switch to Ion Balance mode. Here, ion balance voltage measurement can reach up to ±300V. Application: It is mainly used to measure the electrostatic properties of textile raw materials and finished products (including fibers, yarns, fabrics, carpets, decorative fabrics) under laboratory conditions. It can also be used to measure the electrostatic properties of other sheets and plate materials such as paper, rubber, plastics, composite boards, etc. FMX-004 has four button switches to perform many functions. Button Name (Color) Functions POWER (Red) Turns on and off the power, a white LED for brighter display and Auto Power Off function MODE (Blue) Changes the mode to measurement HOLD (Green) Holds the measured value and the bar graph ZERO ( Gray) Adjusts the displayed value to zero FEITA FMX-004 Fieldmeter Features Compact and light bodyLED assisted distance indicationFour measurement modes (AUTO, Hi, Low, Ion balance)Digital zero and Hold functionEasy plate attachment for ion balance measurement Grounding Connection The accuracy might be affected by the static charge on the person making the measurement if FMX-004 is ungrounded. For proper measurement, the operator should be grounded using a wrist strap and/or FMX-004 shall be grounded on the right side grounding socket by the grounding lead provided with the equipment.CAUTION! The plastic case of FMX-004 is made of conductive resin. The grounding terminal provides the reference potential for the electrical circuit. This terminal should be grounded properly for proper measurement. If it is not properly grounded, the accuracy is not guaranteed. Ion Balance Plate Installation During static charge measurement, the ion balance plate is attached to the bottom end (opposite to that with the sensor) normally. For ion balance measurement it should be removed and attached to the top end having the sensor.Press rear side release buttons from both side and draw out the ion balance plate.Insert the plate into the sensor side slots until it clicks into place and stops, the plate should enter smoothly. It should not move when secured in place properly. Forcible insertion could result in damage to the unit. In order to remove the plate after ion balance measurement, press sensor side release buttons from both sides and draw it out. The plate can be kept attached to either end of FMX-004 when not in use. Ion Balance Measurement Initially, ground the plate to remove any static charge. Press the center of red circle button switch marked [POWER] once. A single beep (0.25 second) sounds to inform that FMX-004 is into standard mode.Press the center of blue circle button switch marked [MODE] once. LCD display shows “IB” along with digital numerical value, polarity sign, unit of measurement “V”, bar graph scale and battery condition. FMX-004 is, now, ready for ion balance measurement. Five minutes after the power is turned on, FMX-004 will turn itself off automatically.Press [POWER] button again to turn off FMX-004. All indications disappear. SPECIFICATIONS Measuring Range: AUTO: 0 - ±1.49 kV (low range); ±1.0 kV - ±30.0 kV (hi range); HI Range: 0 - ±30.0 kV; LOW Range: 0 - ±3.00 kV; Ion Balance: 0 - ±300V Distance: 25 mm ±0.5 mm (between charged object/fieldmeter) Response Time: <1 sec Accuracy: ±10% Power: 9V, 6F22Y manganese battery; life approx. 30 hrs Dimensions: 115 mm (L) x 73 mm (W) x 25 mm (H) (without ion balance plate); 123 mm (L) x 73 mm (W) x 25 mm (H); (with ion balance plate) Weight: 140g with battery for static charge measurement; 170g with battery and ion balance plate Case material: Conductive resin (ABS) FMX-004 Electrostatic Fieldmeter FT-001D Digital Ionizing Fan FT-001A Ionizing Air Blower FT-002D Digital Ionizing Fan FT-003D Digital Ionizing Fan FT-004D Digital Ionizing Fan Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 3.7 out of 5 stars 19 3.2 out of 5 stars 27 3.5 out of 5 stars 16 4.8 out of 5 stars 19 4.8 out of 5 stars 19 4.8 out of 5 stars 19 Price $349.00$349.00 $99.99$99.99 $56.99$56.99 $189.99$189.99 $259.99$259.99 $349.99$349.99 Response Time < 1.0 sec < 1.2 sec < 1.5 sec < 1.0 sec < 1.0 sec < 0.8 sec Ion Balance ±300V ±10V ±10V ±10V ±10V ±10V Coverage Area 0.98in 15.7x23.6in 15.7x23.6in 15.7x35.4in 15.7x47.2in 15.7x57.1in