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Extech 412300A Process Current Calibrator/Meter

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Extech 412300A Features:

  • This Upgraded models now feature super large LCD display and touch keypad
  • LCD displays readings in mA or as a % of the 0 to 24mA range or as mV in voltage ranges
  • Five stored calibration values for fast calibrations
  • 412300A Current Calibrator provides 0 to 24mA output displayed as mA or % and provides 24VDC power to measure a two-wire current loop
  • Complete with 9V battery, calibration cable with spade lug terminals, carrying case.


  • Setup and calibration of process devices such as transducers, indicators, recorders and controllers
  • Troubleshooting and Field service
  • Product design
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SKU: Extech 412300A Category: Tags: , ,

Precision source for calibrating process devices and measuring DC process signals

Extech 412300A allows you to measure and source current readings simultaneously whivh can be beneficial to a many people who regularly complete jobs involving measuring current. The Extech 412300A Current Calibrator/Meter is an oyster flip device made easier to use by its ability to be stood up on a bench or workspace.

For added ease of use coupled with the oyster flip case of this measuring current device, it also comes with a detachable strap that can be hung around your neck leaving you completely hands free to undertake other tasks at the same time.

Extech 412300A has also been programmed with five preset calibration values for fast calibration calculations in the field for efficient working.

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. The M1 icon (memory location 1) will appear in the display and the value stored in that location will be displayed and sourced. 3. Repeated pressing of the MEM button will step through the 5 memory locations. NOTE: The “SOURCE” icon will blink when the output value has not reached a stable level. The common cause for the “SOURCE” icon to remain blinking is that the load impedance is too high in the current mode.

Storing values into memory: 1. As described above, select and display a memory location (M1, 2, 3, 4, or 5) 2. Use the ▲ ▼buttons to adjust the display to the desired source value. 3. Press and hold the MEM button for > 2 seconds. The displayed value will be stored in the displayed memory location. Default memory values. Five common source values are permanently programmed in memory as the default values. These values can be replaced by user selected values.

To reset the meter to the default memory values: 1. Turn the meter on and select the SOURCE mode. 2. Press and hold the POWER button until appears in the display and then release the POWER button. The memory locations will revert to the default values. Default Memory Values M1 M2 M3 M4 M5 are 4mA, 8mA, 12mA, 16mA, 20mA (0% 25% 50% 75% 100%).

Extech 412300A Specifications:

General Specifications
Display 3 1/2 digit LCD (2000 counts, displays 0 to 1999)
Accuracy (of reading) ± (0.075% + 1 digit) or ± 3 digits, Whichever is greater
Meter Power 9 volt battery or AC adaptor
Loop Power 24V DC
Maximum Load 350 ohms at 20 mA
Dimensions 96 x 108 x 45mm folded
Weight 340g
Accessories Supplied 9V battery, calibration cable with spade lugs, carrying case
Optional Accessories 220/240V AC Adaptors
Range Specifications
Measurement range (resolution) 0 to 50mA, 0 to 19.99V (412355A only)
Output ranges (resolution) 0 to 24.0mA (upto 1000 ohms), -25% to +125% (0.1%)



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