TEMPO COMMUNICATIONS MM810 Digital Multimeter Instruction Manual

MM810 Digital Multimeter
Instruction Manual

MM810 Digital Multimeter

** Read and understand all of the instructions and safety information in this manual before operating or servicing this tool.
Description**
The Tempo MM810 Digital Multimeter is a hand-held testing device with the following measurement capabilities: AC and DC voltage, AC and DC current, frequency, resistance, capacitance, and duty cycle of logic level signals. It also checks diodes and verifies continuity. The meter features true RMS AC measurements, a relative zero mode, data hold mode, and an intelligent automatic power off.
Other specialized capabilities and functions common to all meters include:

• Dual display shows two measurements, such as AC voltage and frequency, at the same time.
• Backlit LCD for reading in dim conditions.
• Beep-Jack™ audible warning alerts the user with a beep and an error message on the LCD if  the test lead is plugged into the mA/μA or A input terminal while the selector switch is not in  the mA/μA or A position.
• Bar graph display, which responds more quickly than the numeric display — useful for  detecting faulty contacts, potentiometer clicks, and signal spikes.

Safety

Safety is essential in the use and maintenance of Tempo tools and equipment. This instruction manual and any markings on the tool provide information for avoiding hazards and unsafe practices related to the use of this tool. Observe all of the safety information provided.
Purpose of This Manual
This instruction manual is intended to familiarize all personnel with the safe operation and maintenance procedures for the Tempo MM810 Digital Multimeter.
Keep this manual available to all personnel. Replacement manuals are available upon request at no charge at www.TempoCom.com.
**** Do not discard this product or throw away!
For recycling information, go to www.TempoCom.com.

Important Safety Information

SAFETY ALERT SYMBOL
This symbol is used to call your attention to hazards or unsafe practices which could result in an injury or property damage. The signal word, defined below, indicates the severity of the hazard. The message after the signal word provides information for preventing or avoiding the hazard.
Danger
Immediate hazards which, if not avoided, WILL result in severe injury or death.
Warning
Hazards which, if not avoided, COULD result in severe injury or death.
Caution
Hazards or unsafe practices which, if not avoided, MAY result in injury or property damage.
Warning
Read and understand this material before operating or servicing this equipment. Failure to understand how to safely operate this tool could result in an accident causing serious injury or death.

Warning
 Electric shock hazard:
Contact with live circuits could result in severe injury or death.
All specifications are nominal and may change as design improvements occur. Tempo Communications Inc. shall not be liable for damages resulting from misapplication or misuse of its products.
Beep-Jack is a trademark of BTC.
Warning
Electric shock hazard:

• Do not expose this unit to rain or moisture.
• Do not use this unit if it is wet or damaged.
• Only use the test leads provided with the equipment or UL Listed Probe Assembly with same rating or better.
• Inspect the test leads or accessory before use. They must be clean and dry, and the insulation must be in good condition. Do not use the test lead if the contrasting inner layer of insulation is visible.
• Use this unit for the manufacturer’s intended purpose only, as described in this manual.

Any other use can impair the protection provided by the unit. Failure to observe these warnings could result in severe injury or death.
Warning
Electric shock hazard:

• Do not apply more than the rated voltage between any two input terminals, or between any input terminal and earth ground.
• Do not contact the test lead tips or any uninsulated portion of the accessory. Failure to observe these precautions may result in injury and can damage the instrument.

Warning
Electric shock hazard:

• Do not operate with the case open.
• Before opening the case, remove the test leads from the circuit and shut off the unit.
  Failure to observe these warnings could result in severe injury or death.

Warning
Electric shock hazard:
The fuses are an integral part of the overvoltage protection. When fuse replacement is necessary, refer to “Specifications” for the correct type, size, and capacity. Using any other type of fuse will void the overvoltage protection rating of the unit. Failure to observe this warning could result in severe injury or death.
Warning
Electric shock hazard:

• Unless measuring voltage, current, or frequency, shut off and lock out power. Make sure  that all capacitors are discharged. Voltage must not be present.
• Set the selector and connect the test leads so that they correspond to the intended  measurement. Incorrect settings or connections can result in a blown fuse.
• Using this unit near equipment that generates electromagnetic interference can result in  unstable or inaccurate readings.

Failure to observe these warnings could result in severe injury or death.
Caution
Electric shock hazard:
Do not change the measurement function while the test leads are connected to a component or circuit.
Failure to observe this precaution may result in injury and can damage the unit.
Caution
Electric shock hazard:

• Do not attempt to repair this unit. It contains no user-serviceable parts.
• Do not expose the unit to extremes in temperature or high humidity. Refer to  “Specifications.”

Failure to observe these precautions may result in injury and can damage the unit.
Identification

temperature measurement T2

Symbols on the Unit
Warning—Read the instruction manual
** Double insulation
Display Icons**

displayed.
20| R| Record function is enabled.
21| C| Crest capture function is enabled.
22| H| Hold function is selected.
23| | Automatic ranging is enabled.
24| | Continuity
25| | Low battery
26| | Overload symbol (bar graph display)
27| 10| Bar graph maximum range indicator
28| dBm| Decibel
29| m| Milli (10-3 )
30| V| Volt
31| A| Ampere
32| n| Nano (10-9)
33| µ| Micro (10-6)
---|---|---
34| S| Siemen
35| F| Farad
36| D%| Duty cycle function is enabled.
37| k| Kilo (103)
38| Hz| Hertz (frequency in cycles per second)
39| M| Mega (106 ) Ohm
40| Ω|
Secondary Display
41| M| Mega (106)
42| k| Kilo (103)
43| Ω| Ohm
44| Hz| Hertz (frequency in cycles per second)
45| m| Milli (10-3 )
46| µ| Micro (10-6 )
47| A| Ampere
48| V| Volt
49| D%| Duty cycle function is enabled.
50| n| Nano (10-9 )
51| S| Siemen
52| F| Farad
53| 8.8.8.8| Numeric display
54| | DC measurement is selected.
55| –| AC measurement is selected.
56| | Polarity indicator
57| T1| T1 function is enabled.
58| T2| T2 function is enabled.

Using the Features
All Models

• Dual Digital Display: These meters can display two measurements, such as AC voltage  and frequency, at the same time. Display combinations are shown using large symbols to  indicate the measurement on the primary display and small, raised symbols to indicate the  measurement on the secondary display. For example, “VACHz” means the primary display  contains the AC voltage measurement, and the secondary display contains the frequency measurement.

• SELECT: Press momentarily to toggle between functions, or to toggle between AC and DC  when measuring current and millivolts.

• RANGE: Press once to enter the manual ranging mode. The icon will disappear from  the display. Press repeatedly to step through the ranges. Press and hold to return to the  automatic ranging mode.
  Note: When using MAX-MIN, HOLD, or Δ mode, pressing RANGE will cause the meter to exit  that mode.

• Δ: Finds the difference between two measurements. While taking a measurement, press Δ to  set the display to zero. The Δ icon will appear on the display. Take the second measurement.  The value on the display will be the difference between the two measurements.
  Press again to exit this mode.

• HOLD : Press momentarily to hold the present value on the display. Press again to exit this  mode. This feature does not affect the bar graph.

•  Press and hold until backlight illuminates. Press and hold again to turn off. The  backlight automatically turns off after approximately 30 seconds to extend battery life.

• Automatic Power Off: To extend battery life, the meter will shut itself off after approximately  30 minutes of inactivity. To restore power, press either the SELECT, RANGE, Δ, or HOLD  button momentarily, or turn the selector to OFF and then back on. To disable this feature,  press SELECT while turning the meter on.

• Disabling the Beeper: Hold down the RANGE button while turning the meter on to temporarily disable the beeper feature. Turn the selector to OFF and then back on to enable the beeper.

AC Measurement
AC measurements are usually displayed as RMS (root mean square) values. The RMS value is equal to the value of a DC waveform, which would deliver the same power if it replaced the time-varying waveform. Two AC measurement methods are average-responding RMS calibrated and true RMS-reading.
The average-responding RMS calibrated method takes the average value of the input signal after full wave rectification, multiplies it by 1.11, and displays the result. This method is accurate if the input signal is a pure sine wave.
The average-responding RMS calibrated method takes the average value of the input signal after full wave rectification, multiplies it by 1.11, and displays the result. This method is accurate if the input signal is a pure sine wave.
The true RMS-reading method uses internal circuitry to read the true RMS value. This method is accurate, within the specified crest factor limitations, whether the input signal is a pure sine wave, square wave, triangle wave, half wave, or signal with harmonics. The ability to read true RMS provides much more measurement versatility. The Tempo MM810 is a true RMS meter. The Waveforms and Crest Factors table shows some typical AC signals and their RMS values.
Waveforms and Crest Factors

Waveform| | | |
---|---|---|---|---
RMS Value| 100| 100| 100| 100
Average Value| 90| 100| 87| 64
Crest Factor* | 1.414| 1| 1.73| 2

• The crest factor is the ratio of the peak value to the RMS value; it is represented by the Greek letter .

Measurement Categories

These definitions were derived from the international safety standard for insulation coordination as it applies to measurement, control, and laboratory equipment. These measurement categories are explained in more detail by the International Electrotechnical
Commission; refer to either of their publications: IEC 61010-1 or IEC 60664. Measurement Category |
Signal level. Electronic and telecommunication equipment, or parts thereof. Some examples  include transient-protected electronic circuits inside photocopiers and modems.
Measurement Category Il
Local level. Appliances, portable equipment, and the circuits they are plugged into. Some examples include light fixtures, televisions, and long branch circuits.
Measurement Category III
Distribution level. Permanently installed machines and the circuits they are hard-wired to. Some examples include conveyor systems and the main circuit breaker panels of a building’s electrical system.
Measurement Category IV
Primary supply level. Overhead lines and other cable systems. Some examples include cables, meters, transformers, and other exterior equipment owned by the power utility.

Operation

Warning
Electric shock hazard:
Contact with live circuits could result in severe injury or death.

1. Refer to the Settings Table. Set the selector to the proper setting, press SELECT (when instructed to do so), and connect the test leads to the meter.
2.  Refer to “Typical Measurements” for specific measurement instructions.
3. Test the unit on a known functioning circuit or component.

• If the unit does not function as expected on a known functioning circuit, replace the battery and/or fuses.
• If the unit still does not function as expected, call Tempo for technical assistance at 800-642-2155, Option 2. 4. Take the reading from the circuit or component to be tested.

Settings Table
The meter stores the last used function of each selector position in its nonvolatile memory. If this is not the correct function when you turn the selector, press SELECT until the desired icon appears. The dual display options are shown along with the icons. In the table, “~VHz” indicates that “~” and “V” appear in the primary display, and “Hz” appears in the secondary display. This combination shows the AC voltage measurement in the primary display and frequency in the secondary display.

To measure this characteristic .| Set the selector to this symbol …| Press SELECT until these icons appear on
the display …| Connect the red lead to …| Connect the black lead to
---|---|---|---|---
All Models
Voltage—AC (1000 V max)| | ~ VHz or Hz~V| ΩV| COM
Voltage—DC (1000 V max)| | V or V~V| ΩV| COM
Voltage—DC (600 mV max)| | mV or   mV~mV| ΩV| COM
Voltage—AC (600 mV max)| | mVHz or Hz~mV| ΩV| COM

This table continues on the next page.
Settings Table (cont’d)

To measure this
characteristic …| Set the selector to
this symbol …| Press SELECT until
these icons appear on
the display …| Connect
the red
lead to …| Connect the
black lead
to …
---|---|---|---|---
All Models (cont’d)
*Frequency—Logic Level| Hz| Hz| ΩV| COM
Frequency—Line Level Voltage or Current| Set for voltage or current according
to this table.| Any display option that includes Hz| —| —
% Duty Cycle| D%| D%| ΩV| COM
Resistance| Ω| Ω| ΩV| COM
Continuity| | | ΩV| COM
**Capacitance| | F| ΩV| COM
Diode| | V and diod| ΩV| COM
Current—AC/DC (10 A max)| A| A, A~A or AHz| A| COM
Current—AC/DC (600 mA max)| mA| mA, mA~mA or mAHz| mApA| COM
Current—AC/DC (6000 pA max)| pA| µA, µA~µA or µAHz| mApA| COM

• Logic level frequency has a fixed sensitivity and is for digital signals. Refer to “Accuracy”.
  ** Discharge capacitor before measurement. Refer to “Typical Measurements” regarding polarized capacitors.
  Refer to “Using the Features” for a detailed description of this mode.

Typical Measurements

Voltage Measurement Current Measurement Typical Measurements

Accuracy
Refer to the “Specifications” section for operating conditions and temperature coefficient.
Accuracy is specified as follows: + (a percentage of the reading + a fixed amount) at 23 °C + 5 °C (73.4 °F + 9 °F), 0% to 75% relative humidity.
True RMS Readings: Voltage and current accuracies are specified from 10% to 100% of the range unless otherwise specified. Frequency must be within the specified bandwidth for non-sinusoidal waveforms. Crest factors are as follows:

• Crest factor < 3:1 at full scale
• Crest factor < 6:1 at half scale

All Models
AC Voltage

Ran ge| Accuracy at 50 to 60 Hz| Accuracy at 40 to 500 Hz| Accuracy at 500 Hz to 1 kHz| Accuracy at 1 to 3 kHz| Accuracy at 3 to 20 kHz
---|---|---|---|---|---
60.00 mV| ± (0.5% +
0.03 mV)| ± (0.8% +
0.04 mV)| ± (2.0% +
0.03 mV)| ± (2% +
0.03 mV)| ± (2% +
0.03 mUyi)
600.0 mV| ± (0.5% +
0.3 mV)| ± (0.8% +
0.4 mV)| ± (2.0% +
0.3 mV)| ± (2% +
0.3 mV)| ± (2% +
0.3 mV)(1)
9.999 V| ± (0.5% +
0.003 V)| ± (1.0% +
0.004 V)| ± (1.0% +
0.004 V)| ± (3% +
0.004 V)| 3 dB
99.99 V| ± (± (0.5% +
0.03 V)| ± (1.0% +
0.04 V)| ± (1.0% +
0.04 V)| ± (3% +
0.04 V)| 3 dB
999.9 V| ± (0.5% + 0.3 V)| ± (2.0% + 0.4 V)| ± (2.0% + 0.4 V)| ± (3% + 0.4V)| Unspecified

(1) Specified from 30% to 100% of range
Input Impedance: 10 MΩ, 50 pF nominal (80 pF nominal for 600 mV range)
DC Voltage

Input Impedance : 10 MΩ, 50 pF nominal (80 pF nominal for 600 mV range)
Resistance and Conductance

1.2 VDC

6.000 kΩ| ± (0.1% + 0.003 kΩ)
60.00 kΩ| ± (0.1% + 0.03 kΩ)
600.0 kΩ| ± (0.1% + 0.3 kΩ)
6.000 MΩ| ± (0.4% + 0.003 MΩ)
60.00 MΩ| ± (1.5% + 0.05 MΩ)
99.99 nS| ± (0.8% + 0.1 nS)| 1.2 VDC

Continuity
Tone Threshold: Between 20 Ω and 300 Ω
Response Time: < 100 μs
Capacitance

1. Accuracies with film capacitor or better
2. In manual ranging mode, measurements are not specified below 50.0 µF, 0.54 mF, and 5.4 mF for 600.0 µF, 6.000 mF and 25.00 mF ranges, respectively

Diode Test
Measuring Range: 2.000 V
Test Current (typical): 0.4 mA
Open Circuit Voltage: < 3.5 VDC
Accuracy: 1.0% + 0.001 V
Accuracy (cont’d)
AC Current

Range| Accuracy at 50 to 60 Hz| Accuracy at 40 to 1 kHz| Burden Voltage (typical) (all frequency ranges)
---|---|---|---
600.0 µA| ± (0.6% + 0.3 µA)| ± (0.8% + 0.4 µA)| 0.08 mV/µA
6000 µA| ± (0.6% + 3 µA)| ± (0.8% + 4 µA)
60.00 mA| ± (0.6% + 0.03 mA)| ± (0.8% + 0.04 mA)| 2.1 mV/mA
600.0 mA| ± (1.0% + 0.3 mA)| ± (1.0% + 0.4 mA)
6.000 A| ± (0.8% + 0.006 A)| ± (0.8% + 0.006 A)| 0.02 V/A
10.00 A| ± (0.8% + 0.06 A)| ± (0.8% + 0.06 A)

10 A continuous, 20 A for 30 sec. maximum with 5 minute cool down.
DC Current

Range| Accuracy at 50 to 60 Hz| Burden Voltage (typical) (all frequency ranges)
---|---|---
600.0 µA| ± (0.2% + 0.4 µA)| 0.08 mV/µA
6000 µA| ± (0.2% + 4 µA)
60.00 mA| ± (0.2% + 0.04 mA)| 2.1 mV/mA
600.0 mA| ± (0.2% + 0.4 mA)
6.000 A| ± (0.2% + 0.004 A| 0.02 V/A
10.00 A| ± (0.2% + 0.04 A)

10 A continuous, 20 A for 30 sec. maximum (20 A for DML-430A) with 5 minute cool
Line Level Frequency

Accuracy for Frequency Ranges

Crest Capture (Voltage and Current) for Crests > 1.0 ms in duration
Accuracy: Specified accuracy + 250 digits
Record Mode for changes > 100 ms in duration
Accuracy: Specified accuracy + 10 digits

Specifications

Display:
9999 counts: ACV, DCV, Hz, and nS
6000 counts: mV, μA, mA, A, ohm, and capacitance
Polarity: Automatic Sampling Rate: Numeric Display: 5 per second 41-Segment Bar Graph Display: 60 per second
Temperature Coefficient: Nominal 0.15 x (specified accuracy) per °C below 18 °C or above 28 °C
Automatic Power Off: After 30 minutes of inactivity.
To disable this feature, press SELECT while turning the meter on.
Noise Rejection*:
Normal Mode Rejection Ratio > 60 dB at 50 Hz and 60 Hz when measuring DCV Common Mode Rejection Ratio > 60 dB from 0 Hz to 60 Hz when measuring ACV Common Mode Rejection Ratio > 120 dB at 0 Hz, 50 Hz and 60 Hz when measuring DCV
Operating Conditions:
0 °C to 45 °C (32 °F to 113 °F), 0% to 80% relative humidity (non-condensing)
Altitude: 2000 m (6500′) maximum Indoor use only
Pollution Degree: 2
Storage Conditions: –20 °C to 60 °C (–4 °F to 140 °F)
0% to 80% relative humidity (non-condensing) Remove battery.
Battery: 9-Volt (NEDA 1604, JIS 006P or IEC 6F22)
Overload Protections:
μA and mA: 0.44 A/1000 V DC/AC rms, interrupting rating 10 kA, F fuse,13/32″ x 1-1/2″ A: 11 A/1000 V DC/AC rms, interrupting rating 20 kA, F fuse, 13/32″ x 1-1/2″
V: 1100 V DC/AC rms
mV, Ω, and Other Functions: 1000V DC/AC rms
Safety: Double insulation per IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/ EN61010-2-033 Ed. 2.0, IEC/UL/EN61010-031 Ed. 1.1 and CAN/CSA-C22.2 No. 61010-1-12
Ed. 3.0 to Category IV 1000 VAC and VDC
All Terminals: Category IV 1000 VAC and VDC
CENELEC DIRECTIVES: These meters conform to CENELEC Low-voltage directive 2006/95/EC and Electromagnetic compatibility directive 2004/108/EC
Noise rejection is the ability to reject unwanted signals, or

• Normal mode voltages are AC signals that can cause inaccurate DC measurements. NMRR (Normal Mode Rejection Ratio) is a measure of the ability to filter out these
• Common mode voltages are signals present at the COM and + input terminals, with respect to ground, that can cause digit rattle or offset in voltage measurements. CMRR (Common Mode Rejection Ratio) is a measure of the ability to filter out these signals.

Statement of Conformity
Tempo Communications Inc. is certified in accordance with ISO 9001 (2015) for our Quality Management Systems.
The instrument enclosed has been checked and/or calibrated using equipment that is traceable to the National Institute for Standards and Technology (NIST).
Warning
Electric shock hazard:
Before opening the case, remove the test leads from the circuit and shut off the unit. Failure to observe these warnings could result in severe injury or death.
Electric shock hazard:
Warning
The fuses are an integral part of the overvoltage protection. When fuse replacement is necessary, refer to “Specifications” for the correct type, size, and capacity. Using any other type of fuse will void the overvoltage protection rating of the unit.
Failure to observe this warning could result in severe injury or death.
Replacing the Battery

1. Disconnect the unit from the circuit. Turn the unit OFF.
2.  Remove the two screws from the battery access door and remove it.
3.  Replace the battery making sure to observe the polarity.

Replacing the Fuses

1. Disconnect the unit from the circuit. Turn the unit OFF.
2.  Remove the two screws from the battery access door and remove it.
3.  Unscrew the two screws inside the battery compartment and the two screws on the back case.
4.  Remove the back cover and replace the fuses.
5.  Align the two halves of the unit and the rubber gaskets.
6. Be sure the selector is in the original position so that it lines up properly with the internal switch.
7. Replace the cover and screws.

Cleaning and Storage
Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives If the meter will not to be used for periods longer than 60 days, remove the battery and store it separately.
Limited Warranty
Tempo Communications Inc. warrants to the original purchaser of these goods for use that these products will be free from defects in workmanship and material for one year, excepting normal wear and abuse.
For all Test instrument repairs, you must first request a Return Authorization Number by contacting our Customer Service department at: toll free in the US and Canada 800-642-2155
Telephone +1 760 510-0558 • Facsimile +1 760 598-9263.
This number must be clearly marked on the shipping label. Ship units Freight Prepaid to: Tempo
Repair Center, 1390 Aspen Way, Vista, CA 92081 USA.
Mark all packages: Attention: TEST INSTRUMENT REPAIR.
For items not covered under warranty (such as dropped, abused, etc.) repair cost quote available upon request.
Note: Prior to returning any test instrument, please check to make sure batteries are fully charged.

Tempo Communications
1390 Aspen Way
Vista, CA 92081
USA
800-642-2155
Tempo Europe Ltd.
Brecon House, William Brown Close
Cwmbran, NP44 3AB, UK
Tel: +44 1633 927 050
www.TempoCom.com

References

• Professional. Nothing Less.™ | Greenlee
• Tempo Communications – Industry-leading Test and Measurement Solutions

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