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Introduction Congratulations on your purchase of the Extech Current Calibrator Model 412300A. The 412300A can measure/source current and can also power a current loop. A built-in five location memory can store customized calibration current output steps. The Oyster Series meters have a convenient flip up display with neck-strap for hands-free operation. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Meter Description 1. LCD display 2.
Keypad and Switch Descriptions POWER BUTTON and AUTO POWER OFF FEATURE 1. Use the POWER button to turn the unit ON or OFF. When the unit is powered up, a short self-test will ensue after which the display will stabilize. 2. This meter can either be powered by one 9V battery or an AC adapter. 3. When the battery symbol appears on the LCD display, replace the battery as soon as possible. Low battery power may cause inaccurate readings and erratic meter operation. 4.
MEM BUTTON The memory feature provides the user with five (5) user programmable source values for stepped calibration outputs. The feature is available for mA and % units in the SOURCE mode. The stored values are kept in non-volatile memory (memory that is retained even after power is removed from the calibrator). Source from the stored memory values: 1. Select the Source mode as described earlier 2. Press the MEM button.
Modes of Operation MEASURE (Input) Mode of Operation In this mode, the unit will measure up to 50mADC. 1. Slide the function switch to the SOURCE/MEASURE position. 2. Turn the meter ON 3. Press the MODE button to select MEASURE 4. Connect the Calibration Cable to the meter. 5. Connect the Calibration Cable to the device or circuit under test. 6. Read the measurement on the LCD display. SOURCE (Output) Mode of Operation In this mode, the unit can source current up to 24mADC at 1000 ohms 1.
Specifications General Specifications Display Meter Power Auto Power OFF 9999 count LCD 9 volt battery or AC adaptor Meter automatically powers off after 10 minutes of inactivity 24mADC at 1000 ohms 5ºC to 40ºC (41ºF to 104ºF) o o o o -20 C to 60 C (- 4 F to 140 F) Max 80% up to 31ºC (87ºF) decreasing linearly to 50% at 40ºC (104ºF) <80% 2000meters (7000ft.) maximum 96 x 118 x 45mm (3.8 x 4.7 x 1.8") folded 340g (12 oz.
