User's Guide Model 412355A Current / Voltage Calibrator
Introduction Congratulations on your purchase of the Extech Current/Voltage Calibrator. The Model 412355A can measure and source current and voltage. 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. POWER button 3. UP and DOWN buttons 4. MODE button 5. UNIT button 6. MEM and ZERO button 7.
Operation 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 5 user settable source values for stepped calibration outputs. The feature is available for Voltage, mA and % in the SOURCE mode. The memory values are stored in nonvolatile memory and are not erased when power is turned off. Sourcing from the stored memory values: 1. Select the Source mode 2. Press the MEM button. The M1 icon (memory location 1) will appear in the display and the value stored in that location will be displayed and sourced. 3.
Measure and Source MEASURE (Input) In this mode, the unit will measure voltage or current. 1. Select Voltage or Current on the Function switch. 2. Turn the meter ON 3. Press the MODE button to select MEASURE 4. Press the UNIT button to select mA or % if current is selected. 5. Connect the Calibration Cable to the meter. 6. Connect the Calibration Cable to the device or circuit under test. 7. Read the measurement on the LCD display.
Specifications General Specifications Display 9999 count LCD Meter Power 9 volt battery or 9V AC adaptor Auto Power OFF Meter automatically powers off after 10 minutes of inactivity Current output capability 24mA at 1000 ohms Operating Temperature 5ºC to 40ºC (41ºF to 104ºF) Storage Temperature -20 C to 60 C (-4 F to 140 F) Operating Humidity Max 80% up to 31ºC (87ºF) decreasing linearly to 50% at 40ºC (104ºF) Storage Humidity <80% o o o o Operating Altitude 7000ft.
