Introduction Congratulations on your purchase of the Extech Calibrator. The Model 412300 Current Calibrator can measure and source current. It also has 12VDC loop power for powering and measuring simultaneously. The Model 412355 can measure and source current and voltage. The Oyster Series meters have a convenient flip up display with neck-strap for hands-free operation.
Meter Description Refer to the Model 412300 diagram. The Model 412355, pictured on the front cover of this user guide, has the same switches, connectors, jacks, etc. Operational differences are described in this manual. LCD display Battery Compartment for 9V Battery...
6. Read the measurement on the LCD display. SOURCE (Output) Mode of Operation In this mode, the unit can source current up to 24mADC (412300) or 25mADC (412355). The Model 412355 can source up to 10VDC. 1. Slide the Mode switch to the SOURCE position.
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POWER/MEASURE Mode of Operation (412300 only) In this mode the unit can measure current up to 24mA and power a 2-wire current loop. The maximum loop voltage is 12V. 1. Slide the Mode switch to the POWER/MEASURE position. 2. Connect the Calibration Cable to the meter and to the device to be measured.