USER GUIDE AC/DC Magnetic Meter Model MF100
EXTECH INSTRUMENTS Introduction Thank you for selecting the Extech Instruments Model MF100. This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.com) to check for the latest version of this User Guide, Product Updates, and Customer Support.
EXTECH INSTRUMENTS Safety International Safety Symbols This symbol indicates the user must refer to the manual for further information. Double insulation Safety Notes o o Remove the battery if the device is to be stored for longer than 60 days. Never dispose of batteries in a fire. Batteries may explode or leak. Cautions o o Read and understand this user manual before operating the meter.
EXTECH INSTRUMENTS Description Meter Description 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Probe Connection LCD Display HOLD Button POWER Button REC Button ZERO Button MODE DC/AC/SET Button Tilt‐Stand and battery compartment on rear Reset Button DC 9V Power Adapter jack 1 2 3 4 5 6 7 Fig. 1 – Meter Description 9 10 8 Probe Description 1. 2. 3. 4. 1 Probe Sensing Head Probe Handle Probe cable Probe Head Cover 2 4 Fig. 2 – Probe Description 3 4 MF100‐en‐GB_V1.
EXTECH INSTRUMENTS Display Description 1. 2. 3. 4. North N or South S indication Unit of measure (G for Gause or mT for milliTesla) AC or DC field and resolution information Magnetic reading 1 2 3 Fig. 3 – Display Description 4 Button Description 1. 2. POWER Button: Press and hold to power the meter ON or OFF HOLD Button: Short press to freeze displayed reading (HOLD icon will appear); another short press to return to normal operation 3.
EXTECH INSTRUMENTS Operation AC/DC Magnetic Field Measurement Press and hold the POWER button for at least 2 seconds to switch the meter ON. Use the MODE button to scroll through the following screens in sequence: Under G unit Under mT unit N(S) 0 a1 .0 N(S) 0.0 mT .0 AC 0.0 0 0 N(S) b1 0 G a2 0 mT 0 0 N(S) mT G b2 .0 c1 mT d1 0 G 0 AC 0 G .0 AC c2 d2 AC Fig.
EXTECH INSTRUMENTS For DC magnetic field measurements, the display will show either the N or S indicator. For the North Pole, the N indicator will be shown. Similarly, for the South Pole, the S indicator will be shown. For AC magnetic field measurements, the display will show the AC indicator (the N or S indicators will not then be shown). Press the probe head to the testing material (see Fig 6).
EXTECH INSTRUMENTS User Settings Press and hold the SET button for two seconds to enter the advanced settings mode. Press the SET button to cycle through the three main functions: POFF CLr UNIt Auto power OFF management Factory‐only diagnostic function Select the magnetic field units (mT or G) Note: After 7 to 10 seconds the meter will return to the normal operating mode.
EXTECH INSTRUMENTS Factory Default Reset If the meter becomes inoperative, it can be reset to factory defaults. Open the side compartment and, with the meter on, press the reset switch. The meter will be reset and the User Settings will be cleared and reset to factory defaults. Battery Replacement When the low battery icon appears on the LCD, the battery must be replaced.
EXTECH INSTRUMENTS Specifications Circuit Display (LCD) Size Measurement Units Measurement Range, DC Measurement Range, AC Accuracy At 23°C +/‐ 5°C Frequency Response Sensor Field Direction Display Sampling Time Operating Temperature Operating Humidity Power Supply Power Consumption Weight probe) (meter Dimensions and Custom one‐chip microprocessor LSI circuit 52 x 38mm (2.0 x 1.5 in.) mT MilliTesla Resolution G Gauss mT Range 1 300.00 mT 0.01 mT Range 2 3,000.0 mT 0.1 mT G Range 1 3,000.0 G 0.
