TOL-13843

MOOSHIMETER USER’S MANUAL Mooshim Engineering, LLC 2565 3rd St, Suite 315 San Francisco, CA, 94107 August 2014, Rev 1 © 2014 Mooshim Engineering, All Rights Reserved INTRODUCTION The Mooshim Mooshimeter BLE-DMM-2X-01A (hereafter “The Meter”) is a battery powered multimeter capable of handheld and remote usage via Bluetooth Low Energy. This manual details how to safely use your Mooshimeter. The Meter meets CAT III IEC 61010-1 3rd edition and 61010-2-030 standards. Overvoltage category III (CAT III) defines a level of safety appropriate for the transient overvoltages present in fixed equipment installations at the distribution level. This includes the mains installation of a building, distribution boards, busbars, and permanently connected equipment. Do not use this multimeter for CAT IV circuits, which includes any mains circuits not protected by a building’s breakers. PACKAGE CONTENTS     Mooshimeter (1) o 1.5V AA Alkaline Batteries installed (2) o 12A HRC fuse installed (1) Test Leads (3) Alligator Clip Attachment (3) Carrying case (1) 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. Do not operate the meter unless it is fully assembled with both case screws tight. Only use appropriately rated fuses. Always check for damage before use. Pay special attention to the test leads for signs of damaged insulation or exposed conductors. Immediately replace damaged leads. Only use test leads that are rated to at least CAT III 600V. Keep fingers behind the guards on the leads.     Use caution working with voltages above 30VAC rms, 42VAC peak, or 60VDC. Voltages this high pose risk of shock. Never apply more than 600V between any terminal and earth ground. Do not apply more than 2.0V to the auxiliary terminal with respect to Common. Doing so may draw unexpected current and trigger protection circuits. In this event, basic functionality will automatically return within one minute. Accuracy may be adversely affected for up to five minutes. Error messages may appear on the user interface. Read these messages for further information. TABLE 1 SYMBOLS Caution: Risk of Electric Shock. Refer to operating instructions. Important Information: Refer to operating instructions. CAT III This instrument is rated for installation category III per IEC 61010. Double Insulation Terminal protected by fuse. Current limit of 10A RMS. Conforms to European Union Directives Do not exceed 600V with respect to ground. 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 1.2V 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. Two of the Mooshimeter’s input terminals are capable of making basic voltage measurements: The V terminal can measure up to 600V RMS and is intended for traditional AC and DC voltage measurements. The Ω terminal can measure up to 1V peak (~0.7V RMS for puresine AC) and allows for several new measurement techniques described later in this manual. See the ratings section for further details on the measurement ranges. FIGURE 1 BASIC VOLTAGE MEASUREMENT 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. NOTE AC current range is limited by the instantaneous current. Peaks above the listed limits will result in incorrect readings. Derate AC current limits with high crest factors accordingly. Disconnect power from the circuit to be measured. Break the circuit and wire the meter in series through the “A” and “C” terminals. Positive DC current flows into the “A” terminal. FIGURE 2 BASIC CURRENT MEASUREMENT MEASURING CURRENT WITH AN EXTERNAL CURRENT SHUNT WARNING This measurement mode is capable of measuring 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. The Ω terminal can measure small voltages, with a resolution of as fine as 25nV per count and a noise floor as low as 1µV. This can be used to with external current shunts to measure currents over a very wide dynamic range. See the ratings section to guide shunt size selection. It is possible to use the existing wiring for the current shunt, and in doing so take rough current measurements without breaking the circuit. With very low voltages it is recommended to minimize the loop area of the measurement probes by either twisting them together or using a BNC adaptor. FIGURE 3 EXTERNAL CURRENT SHUNT 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. The meter uses a 100nA test current in its MΩ ranges and a 100uA test current in its kΩ ranges. FIGURE 4 RESISTANCE MEASUREMENT 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. Positive test current flows out of the Ω terminal and into the C terminal. The test current is 100µA. FIGURE 5 DIODE MEASUREMENT 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 (