Extech Current and Voltage Calibrator/Meter
Features
- Five stored calibration values for fast calibrations
- DC process signals from 0 to 24mA and 0 to 20V
- LCD displays readings in mA or as a percentage
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The Extech Current and Voltage Calibrator/Meter displays readings in mA or as a percentage of the 0 to 24mA range or as mV in voltage ranges. Five stored calibration values are easily retrieved for fast calibrations. Model 412355A features current plus voltage calibrations that are adjustable from 0 to 24mA and 0 to 20V as a calibration source. Model 4123000A features a current calibrator that provides 0 to 24mA output and provides 24VDC power to measure a two-wire current loop.
Applications
Applications include setup and calibration of process devices such as transducers, indicators, recorders, and controllers, troubleshooting and field service, and product design.
- Operating modes
- Source: output 0 to 24mA current for loads up to 1000 ohms, output 0 to 20V (412355A only)
- Measure: 0 to 50mA current signal, 0 to 19.99V (412355A only)
- Power/measure: Provides power (24VDC) to loop & measures current (412300A only)
- Input/output
- Ranges: -25.0 to 125.0% (representing 0 to 24mA), 0 to 19.99mA, 0 to 24.0mA, 0 to 1999mV, 0 to 20.00V
- Resolutions: 0.1%, 0.01mA, 0.1mA, 1mV, 10mV
- Accuracy: 0.075% ±1 digit
- Power: 9V battery or AC adaptor
- Dimensions: 3.8 x 4.2 x 1.8" (96 x 108 x 45mm) folded
- Weight: 12oz (340g)
- (1) Calibrator
- (1) 9V Battery
- (1) Calibration cable with spade lug terminals
- (1) Carrying case
- (1) 100V-240V AC Universal adapter (50/60Hz)
In The News
Carbon and Nutrient Monitoring in the Great Lakes Using Satellite Observations
Carbon and nutrients are the foundation of lake food webs and play an important role in the chemical and physical processes that shape aquatic ecosystems and various lake dynamics. Studying these cornerstones can help improve understanding of other lake conditions like harmful algal blooms, hypoxia, and phytoplankton community composition. 
 
The way in which these characteristics are monitored varies, though many rely on a proxy approach wherein parameters are extrapolated from the measurement of a different parameter. An assistant professor at Cleveland State University, Brice Grunert, is working to improve current strategies and take a satellite approach to monitoring the Great Lakes.
Read MoreRestoring North Texas Streams to Historical Flows
North Texas is one of the fastest-growing regions in the state, an area that is expected to face increasing water needs. In order to meet these demands, the Upper Trinity Regional Water District ( UTRWD ) is building Lake Ralph Hall near Ladonia in southeast Fannin County, Texas. 
 
The lake has been in the works since 2003, with construction finally beginning in 2021. The population of the UTRWD is expected to grow 5-fold over the next 50 years, leading to increased water use. 
 
Ed Motley, Program Manager with the UTRWD stresses that even with conservation and reuse, new sources like Lake Ralph Hall are essential to meeting near-term and long-term water needs to support regional growth.
Read MoreScience for Science’s Sake: Monitoring Ocean Energy Availability and Gulf Stream Dynamics
Scientific research often begins with a question, sometimes driven by a specific goal or application, but many scientists believe in science for science’s sake. Marine environments and physical dynamics like the Gulf Stream are popular fields of research due to their complexity and importance, presenting a unique opportunity to learn more about previously unexplored phenomena. 
 
Environmental researchers, in particular, see the value in these ecosystems, but many also grew up with a passion for the natural world, and choosing a field that allows them to interact with and learn about the environment around us is an easy choice.
Read More