N 2 - N e u r o n U S E R ’ S MA N U A L N 2 Curien LLC Los Angeles California May 2020, Rev 1 © 2020 Curien LLC, All Rights Reserved
INTRODUCTION The N2 - Neuron by Curien is the automotive industry’s first compact 2 channel bluetooth graphing multimeter connected to a smart device application that allows for both the initial information to be read and received, but also is opening the gateway into the future of data intelligence and interpretation.
SAFETY INFORMATION WARNING Denotes a potentially hazardous situation that may result in injury or death CAUTION Denotes a potentially hazardous situation that may result in damage to the meter NOTE Denotes a situation that may result in degraded or incorrect measurement · ·· ·· ·· Use caution in the operation of this device. Improper use may result in injury or death. Read this user manual before operating the meter Always remove leads before opening the case.
N 2 TABLE 2 TERMINALS Terminal C A V Ω Description Common terminal for all measurements Input terminal for measuring currents to 10A RMS (AC and DC) Input terminal for measuring voltages to 600V RMS (AC and DC) Input terminal for measuring resistance, diode drop, and voltages up to 1.
BASIC MEASUREMENT INSTRUCTIONS MEASURING VOLTAGE WARNING Risk of Electrocution. For determining whether a circuit is “live” exercise caution if the meter does not report a voltage. This may indicate a poor connection to the circuit being tested. Make sure the probe tips are fully in contact with the circuit before assuming the circuit is safe.
MEASURING CURRENT WITH INTERNAL CURRENT SHUNT WARNING Exercise care when connecting in series with a circuit, especially those containing motor(s). Sudden disconnects may create higher than expected voltages due to inductive kick. WARNING Perform a Fuse Check before measuring currents with the internal current shunt. Exercise caution in determining whether a circuit is “live” if the meter does not report a current. This may indicate either a poor connection or a blown fuse.
MEASURING CURRENT WITH AN EXTERNAL CURRENT SHUNT This measurement mode is capable of measuring WARNING currents many orders of magnitude larger than is typically possible with a handheld meter. Exercise caution while interfacing to high ampacity circuits. NOTE The accuracy of this measurement mode depends on the accuracy of the external current shunt used. Account for this accuracy dependency in your measurements.
MEASURING RESISTANCE NOTE Do not measure resistance on a live circuit. Doing so will result in incorrect readings and may engage the internal protection circuitry. Should this occur, wait 5 minutes before taking further measurements. Resistance is measured between the Ω and C terminals. Polarization is not important. N 2 The meter uses a 100nA test current in its MΩ ranges and a 100uA test current in its kΩ ranges.
DIODE TESTING NOTE Do not use the diode test functionality while connected to a live circuit. Doing so will result in incorrect readings and may engage the internal protection circuitry. Should this occur, wait 5 minutes before taking further measurements. To test diodes or other silicon junction devices, a test current is pushed through the device under test and the resulting voltage is measured. N 2 Positive test current flows out of the Ω terminal and into the C terminal The test current is 100µA.
USING A BNC ADAPTER The 4 terminals are arranged with 0.75” spacing to allow for use of a standard BNC adapter. Measurements using the A or Ω terminals can be used with the C terminal as usual. To use a BNC adapter with the “V” input, use the “A” terminal as the common input. The “A” and “C” terminals are internally connected with a low impedance (<=20mOhms).
TWO CHANNEL MEASUREMENTS Your N2-Neuron is capable of reading any two of its three channels simultaneously. NOTE Measurements using the internal current shunt will experience a degree of cross-talk due to the impedence of the Common lead. Other measurement types will also experience this cross-talk, but it should be negligible. MEASURING SMALL RESISTANCES / CALIBRATING A CURRENT SHUNT The N2-Neuron can be used to measure small resistances in a live circuit.
POWER FACTOR Power factor compares apparently power and actual power, and is a measure of how effectively a load uses available power. This measurement requires voltage and current measurements. Current measurement can be done with either internal or external current shunt mode. Power Factor is a “unitless” measure, so the gain accuracy of the measurements does not affect the measurement accuracy. Therefore, the existing wiring can be used as an external current shunt without calibration.
MAINTANENCE OPENING THE N2-NEURON WARNING To avoid electric shock, disconnect test leads from the meter before opening the meter 1. Disconnect all test leads. 2. Unscrew both retaining screws from the bottom of the case with a Phillips head screwdriver. 3. Separate the two halves. 4. Taking special care not to bend the circuit board, grasp the circuit board as shown near the connectors and pull it out of the top half of the enclosure. 5. Your N2 - Neuron is now fully disassembled.
CLOSING THE N2-NEURON WARNING Risk of electrical shock. Do not operate the meter while partially disassembled. 1. Place the PCB in the bottom enclosure half. Use the “J” shaped fin for alignment with the corresponding cut-out in the PCB 2. Close the two halves together. 3. Replace both screws.
BATTERY REPLACEMENT 1. Open the N2 - Neuron per directions above. 2. Remove old batteries. 3. Observe the battery polarity indication on the circuit board. Insert 2 new AA 1.5V batteries as shown on the circuit board. 4. If you have inserted the batteries with the correct polarity, the N2 - Neuron's LED will blink slowly several times before turning off. If the light does not blink, check the battery polarity. 5. Close the N2 - Neuron per directions above.
FUSE REPLACEMENT FUSE TEST Always perform a Fuse Test before using the WARNING internal current shunt measurement mode. 1. Perform a resistance measurement with the C and Ω terminals connected 2. If the resistance measured is greater than 0.5Ω, replace the fuse* * The resistance mode on the N2 - Neuron is not accurate below 1Ω. The actual resistance of the fuse should be 20mΩ. N 2 FIGURE 8 FUSE TEST WARNING 1. 2. 3. 4. Only use appropriately rated replacement fuse.
REPLACING THE SD CARD To avoid electric shock, disconnect all leads from WARNING the meter. NOTE Only use FAT32 formatted SD cards up to 32 gigabytes. Larger SD cards or cards formatted differently cannot be written to. 1. Open the N2 - Neuron per the directions above. 2. Press the SD card further into the slot until you feel a click. 3. Release: The SD card will eject. 4. Remove old SD card and insert new SD card. 5. Push card in with finger until you feel a click 6.
RESETTING THE N2-NEURON WARNING To avoid electric shock, disconnect all leads from the meter 1. Open the N2 - Neuron per the directions above. 2. Press and Hold the button shown for 5 seconds 3.
GENERAL SPECIFICATIONS Accuracy is specified for 1 year after calibration within 18 to 28C. Accuracies listed are for single-channel measurements only. Multichannel measurements may degrade accuracy. For extended specifications visit www.curienllc.com All AC ranges are RMS assuming a pure sinusoid (crest factor √ ).
Current, Terminal A: Voltage, Terminal V : DC Range 600 V 600 V 455 V 365 V 260 V 200 V 135 V 60 V 40 V 30 V 25 V 18 V 14 V 9V 1000 mV 670 mV 500 mV 400 mV 280 mV 220 mV 150 mV AC Range Resolution 600 V 430 V 320 V 255 V 185 V 140 V 95 V 45 V 30 V 22 V 18 V 12 V 10 V 6V 700 mV 475 mV 350 mV 275 mV 200 mV 150 mV 100 mV 275 µV 140 µV 95 µV 70 µV 50 µV 35 µV 25 µV 20 µV 10 µV 6.4 µV 4.8 µV 3.2 µV 2.4 µV 1.
Voltage, Auxiliary Terminal: DC Range AC Range Resolution Noise Floor 1000 mV 680 mV 510 mV 400 mV 290 mV 220 mV 150 mV 700 mV 475 mV 350 mV 275 mV 200 mV 150 mV 100 mV 300 nV 150 nV 100 nV 75 nV 50 nV 40 nV 25 nV 10 µV 5 µV 4 µV 3 µV 2 µV 2 µV 1 µV Diode Voltage Drop Range Resolution Noise Floor Accuracy 2.2 V 1.2 V 825 mV 625 mV 400 mV 300 mV 200 mV 300 nV 150 nV 100 nV 75 nV 50 nV 40 nV 25 nV 10 µV 5 µV 3.5 µV 2.5 µV 1.75 µV 1.25 µV 800 nV 1.0 + 50 1.0 + 50 1.0 + 50 1.0 + 50 1.0 + 50 1.
RADIO NOTICES FCC Notice (for U.S. Customers): This device complies with part 15 of the FCC Rules: Operation is subject to the following conditions: 1. This device many not cause harmful interference, and 2.
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