MO O S H I M E T E R U S E R ’ S M AN U A L
Mooshim Engineering, LLC
2565 3rd St, Suite 315
San Francisco, CA, 94107
August 2014, Rev 1
© 2014 Mooshim Engineering, All Rights Reserved
IN TRODUC TI ON
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.
PA CK AGE CO NTEN TS
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)
SA FE TY INF ORMA TI ON
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
Description
C
Common terminal for all measurements
A
Input terminal for measuring currents to 10A RMS (AC and DC)
V
Input terminal for measuring voltages to 600V RMS (AC and DC)
Ω
Input terminal for measuring resistance, diode drop, and voltages up to 1.2V
BASIC MEASU REM ENT INSTRUCT ION S
ME AS UR IN G VOLT AG E
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 BA SIC VOLTAGE MEASUR EMEN T
ME AS UR IN G CU RREN T WI TH 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 BA SIC CURRENT MEASUR EMEN T
ME AS UR IN G CU RR ENT WI TH A N EX TE RNAL CU RREN T SHUN T
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 EX TERNAL CURRE NT SHU NT
ME AS UR IN G RESI ST ANCE
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 RE SIS TANCE MEA SUR EMENT
DI ODE TE ST ING
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 DI ODE MEASUREM ENT
US ING A BN C ADAP TE R
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).
FIGURE 6 BNC ADA PTORS FOR Ω, V , A INPUTS
TWO C HAN NEL ME ASUREM ENT S
Your Mooshimeter 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.
ME AS UR IN G SM ALL RE SI STANCE S / CALIBRATING A CURRENT SHUNT
The Mooshimeter can be used to measure small resistances in a
live circuit. The meter simultaneously measures the current and
the corresponding voltage with the precision voltage channel
(Ω), and then finds the slope to calculate resistance.
This can be done with either the internal current shunt or an
external current clamp. Using a current clamp allows the
measurement to be done without breaking the circuit and allows
for test currents above 10 Amps.
Wire the meter in as shown and enable the measurement mode.
Apply a test current and run the analysis.
The analysis works best with several points along the curve.
Therefore, the optimal test current has a large magnitude and a
strong time-varying component below 1kHz. Often this test
current can be the current already present within the system due
to normal operation. For example, an AC system’s steady state or
a DC systems startup transient may provide sufficient data.
FIGURE 7 CU RRE NT CLAMP AND CU RREN T SH UNT COM PARI SON
PO WE R FA CT OR
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.
MAINT ANE NCE
OP EN IN G THE MO OS HI ME TER
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 Mooshimeter is now fully disassembled. The
batteries, fuse and reset button are now accessible.
CL OS ING THE MO OS HI ME TER
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. Tighten firmly.
BATTERY RE PL ACEM EN T
1. Open the Mooshimeter 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 Mooshimeter's LED will blink slowly several
times before turning off. If the light does not blink, check
the battery polarity.
5. Close the Mooshimeter per directions above.
CL EANING
Gently wipe the assembled meter with a damp cloth.
Do not touch or apply cleaning agents to the circuit board.
Do not use any solvents or other cleaning agents while cleaning your Mooshimeter. The outer housing is a polycarbonate based material,
and may be damaged by incompatible cleaners.
FU SE T ES T
WARNING Always perform a Fuse Test before using the
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 Mooshimeter is not accurate below
1Ω. The actual resistance of the fuse should be 20mΩ.
FIGURE 8 FU SE TEST
FU SE R EP LA CEME NT
WARNING Only use appropriately rated replacement fuse.
1. Open the Mooshimeter per directions above.
2. Gently remove existing fuse from holder.
3. Replace fuse only with appropriately rated replacement.
4. Recommended model:
Reomax 632.300.12, available from Mooshim Engineering
Size 3AG 12A hold 600V 10kA minimum interrupt
5. Close the Mooshimeter per directions above.
R EP LACING THE S D CA RD
WARNING To avoid electric shock, disconnect all leads from
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 Mooshimeter 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. Close the Mooshimeter per the directions above.
RE SE TT ING THE MO OS HI METE R
WARNING To avoid electric shock, disconnect all leads from
the meter.
1. Open the Mooshimeter per the directions above.
2. Press and Hold the button shown for 5 seconds
3. Close the Mooshimeter per the directions above
GENER AL SPECIF ICATIO NS
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 moosh.im/eter/specs
All AC ranges are RMS assuming a pure sinusoid (crest factor √ ). Derate ranges linearly with increasing crest factor.
Maximum Voltage between any
terminal and earth ground
600V
Surge Protection
6kV peak per IEC 61010-1 600V CATIII
Fuse for A input
12A Reomax 632.300.12
Temperature Coefficient
???????
Operating Altitude
Up to 2000m
Maximum Temperature Range
5C to 40C
Nominal Temperature Range
18C to 28C. Derate accuracy outside of this range
Input Power
3V 100mA from installed batteries
Battery
2x AA Alkaline, NEDA 15A IEC LR6
Battery Life
1 year typical standby
50 hours typical continuous active use
Size
? cm x ?? cm x ??? cm
Weight
??? g
Safety Compliance
EN61010-1:2010 Measurement Category III 600V
EN61010-2-030
Pollution Degree
2
RF Communications
2.4 GHz ISM Band
Bluetooth Low Energy
RF Communication Range
Free Space: Up to 50m
Electromagnetic compatibility
FCC Part 15.247 Subpart C
ETSI EN 300-328 V1.7.1
EN 61326-1:2013 per EN 55011:2009 + A1: 2010 / Class A Radiated Emissions
EN 61326-1:2013 / ETSI EN 301-489-1 V1.9.2 / EN 301-489-17 V2.2.1/ Immunity Testing
Voltage, Terminal V:
DC Range
AC Range
Resolution
Noise Floor
Accuracy
(%+counts)
600 V
600 V
275 µV
9 mV
0.5 + 20
600 V
430 V
140 µV
5 mV
0.5 + 20
455 V
320 V
95 µV
3 mV
0.5 + 20
365 V
255 V
70 µV
3 mV
0.5 + 20
260 V
185 V
50 µV
2 mV
0.5 + 20
200 V
140 V
35 µV
1090 µV
0.5 + 20
135 V
95 V
25 µV
730 µV
0.5 + 20
60 V
45 V
20 µV
610 µV
0.5 + 20
40 V
30 V
10 µV
305 µV
0.5 + 20
30 V
22 V
6.4 µV
205 µV
0.5 + 20
25 V
18 V
4.8 µV
155 µV
0.5 + 20
18 V
12 V
3.2 µV
105 µV
0.5 + 20
14 V
10 V
2.4 µV
80 µV
0.5 + 20
9 V
6 V
1.6 µV
55 µV
0.5 + 20
1000 mV
700 mV
300 nV
10 µV
0.5 + 20
670 mV
475 mV
150 nV
5 µV
0.5 + 20
500 mV
350 mV
100 nV
4 µV
0.5 + 20
400 mV
275 mV
75 nV
3 µV
0.5 + 20
280 mV
200 mV
50 nV
2 µV
0.5 + 20
220 mV
150 mV
40 nV
2 µV
0.5 + 20
150 mV
100 mV
25 nV
1 µV
0.5 + 20
Current, Terminal A:
DC Range
AC Range
Resolution
Noise Floor
Accuracy
(%+counts)
10 A
9 A
3.8 µA
120 µA
0.5 + 50
8.5 A
6 A
1.9 µA
60 µA
0.5 + 50
6 A
4.5 A
1.3 µA
40 µA
0.5 + 50
5 A
3.5 A
1 µA
30 µA
0.5 + 50
3.5 A
2.5 A
0.7 µA
20 µA
0.5 + 50
2.75 A
2 A
0.5 µA
15 µA
0.5 + 50
1.75 A
1.25 A
0.4 µA
10 µA
0.5 + 50
Resistance
Range
Resolution
Noise Floor
Accuracy
(%+counts)
9 MΩ
1.5 Ω
50 Ω
1.0 + 50
8 MΩ
1 Ω
35 Ω
1.0 + 50
6 MΩ
750 mΩ
25 Ω
1.0 + 50
4 MΩ
500 mΩ
20 Ω
1.0 + 50
3 MΩ
375 mΩ
12 Ω
1.0 + 50
2 MΩ
250 mΩ
8 Ω
1.0 + 50
9.6 kΩ
1.5 mΩ
48 mΩ
1.0 + 50
8.2 kΩ
1 mΩ
32 mΩ
1.0 + 50
6.1 kΩ
750 µΩ
24 mΩ
1.0 + 50
4.1 kΩ
500 µΩ
16 mΩ
1.0 + 50
3 kΩ
375 µΩ
12 mΩ
1.0 + 50
2 kΩ
250 µΩ
8 mΩ
1.0 + 50
Voltage, Auxiliary Terminal:
DC Range
AC Range
Resolution
Noise Floor
Accuracy
(%+count)
1000 mV
700 mV
300 nV
10 µV
0.5 + 20
680 mV
475 mV
150 nV
5 µV
0.5 + 20
510 mV
350 mV
100 nV
4 µV
0.5 + 20
400 mV
275 mV
75 nV
3 µV
0.5 + 20
290 mV
200 mV
50 nV
2 µV
0.5 + 20
220 mV
150 mV
40 nV
2 µV
0.5 + 20
150 mV
100 mV
25 nV
1 µV
0.5 + 20
Diode Voltage Drop
Range
Resolution
Noise Floor
Accuracy
2.2 V
300 nV
10 µV
1.0 + 50
1.2 V
150 nV
5 µV
1.0 + 50
825 mV
100 nV
3.5 µV
1.0 + 50
625 mV
75 nV
2.5 µV
1.0 + 50
400 mV
50 nV
1.75 µV
1.0 + 50
300 mV
40 nV
1.25 µV
1.0 + 50
200 mV
25 nV
800 nV
1.0 + 50
Terminal
Surge Protection
Input Impedance
V
6kV
>10MΩ <200pF
Ω
800V
>100MΩ <200pF
Burden Voltage
A
10kA 600V
<20µV/mA
RADIO NO TICES
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. This device must accept any interference received, Including interference that may cause undesired operation
Changes and Modifications not expressly approved by Mooshim Engineering LLC can void your authority to operate this equipment under
Federal Communications Commissions rules.
This device complies with Industry Canada license-exempt RSS standard(s)
Operation is subject to the following two conditions:
1. this device may not cause interference, and
2. this device must accept any interference, including interference that may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est
autorisée aux deux conditions suivantes:
1. l'appareil ne doit pas produire de brouillage, et
2. l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en
compromettre le fonctionnement.
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