Tempo Communications MM200 User manual

55500087 REV0 © 2019 Tempo Communications Inc. 02/2020
MM200
Digital Multimeter
Multimètre numérique
Multímetro digital
English .................1–20
Français ..............21–40
Español................41–60
INSTRUCTION MANUAL
52058078 REV 1 © 2014 Greenlee Textron Inc. 3/14
Read and understand all of the instructions and safety information in this
manual before operating or servicing this tool.
Register this product at www.greenlee.com
DM-200A • DM-210A • DM-510A
Digital Multimeters
English ....................1–24
Français ................25–48
Italiano ..................49–72
Deutsch..................73–96
Español.................97–120
Português...........121–144
Nederlands.........145–168
INSTRUCTION MANUAL
MANUEL D’INSTRUCTIONS
MANUAL DE INSTRUCCIONES
Read and understand all of the instructions and safety
information in this manual before operating or servicing
this tool.
Lea y entienda todas las instrucciones y la información
sobre seguridad que aparecen en este manual, antes de
manejar esta herramienta o darle mantenimiento.
Lire attentivement et bien comprendre
toutes les instructions et les informations sur la sécurité
de ce manuel avant d‘utiliser ou de procéder à
l‘entretien de cet outil.
Register this product at www.TempoCom.com / Registre este producto en www.TempoCom.com
Enregistrez votrez produit en ligne, www.TempoCom.com

2 3
Description
The Tempo MM200 Digital Multimeter is a hand-held testing devices with the
following measurement capabilities: AC and DC voltage, AC and DC current,
frequency, and resistance. They also check diodes and verify continuity. Other
specialized capabilities and functions common to all meters include:
• 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.
• Non-contact and single-probe voltage detection capability.
• Bar graph display, which responds more quickly than the numeric display —
useful for detecting faulty contacts, potentiometer clicks, and signal spikes.
• Relative zero mode.
• Data hold mode.
• Selectable automatic power off.
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 MM200 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.

MM200A
2 3
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, dened below, indicates the
severity of the hazard. The message after the signal word provides information for
preventing or avoiding the hazard.
Immediate hazards which, if not avoided, WILL result in severe injury or death.
Hazards which, if not avoided, COULD result in severe injury or death.
Hazards or unsafe practices which, if not avoided, MAY result in injury or property
damage.
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.
Electric shock hazard:
Contact with live circuits could result in severe injury
or death.
All specications 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.
KEEP THIS MANUAL

4 5
Important Safety Information
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.
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.
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.
Electric shock hazard:
The fuses are an integral part of the overvoltage protection. When fuse replacement is
necessary, refer to “Specications” 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.

MM200A
4 5
Important Safety Information
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.
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.
Electric shock hazard:
Do not use the tester to measure voltages in circuits that could be damaged or activated by
the AutoCheck™ mode’s low input impedance (approximately 3.0 kΩ and 150 pF).
Failure to observe this precaution may result in injury and can damage the unit.
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
“Specications.”
Failure to observe these precautions may result in injury and can damage the unit.

6 7
6
Identification
1. Display 4-digit LCD (maximum reading is 5999) and bar graph.
2. Feature buttons Refer to explanations in the “Using the Features” section.
3. Selector Selects a function or turns power OFF.
4. ΩV Positive input terminal for all measurements except current.
5. COM Negative, common, or ground input terminal for all measurements.
6. APositive input terminal for high current measurements.
7. mA µA Positive input terminal for low current measurements.
6
7
1
2
4
5
3

MM200A
6 7
DM-200A • DM-210A • DM-510A
7
13. Bar graph element
14. –Polarity indicator for bar graph
15. LoZ Low input impedance is active.
16. Low battery
17. – Polarity indicator
18. 8.8.8.8 Numeric display
19. ∆Relative zero function is enabled.
20. AC measurement is selected.
21. DC measurement is selected.
22. Automatic ranging is enabled.
23. Continuity
24. Hold function is enabled.
25. Crest capture function is enabled.
26. MAX Maximum is displayed or
being recorded.
MIN Minimum is displayed or
being recorded.
27. MMega (106)
28. ΩOhm
29. kKilo (103)
30. Hz Hertz (frequency in
cycles per second)
31. nNano (10-9)
32. FFarad
33. µMicro (10-6)
34. mMilli (10-3)
35. VVolt
36. AAmpere
37. Bar graph scale
38. }Overload (bar graph display)
Display Icons
27-28
29-30
31-32
33-36
38
37
19
20-21
16
15
13-14
17
18
22 23 24 25 26

8 9
Using the Features
All Models
• SELECT: Press momentarily to toggle between functions.
• : 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.
• 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.
• REL: Finds the difference between two measurements. While taking a measurement,
press REL 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.
• Hz: Press and hold until the meter beeps to enable frequency measurement. The frequency
function can be used with the selector in any voltage or current setting. Use the V or A
settings for measuring the frequency of sinusoidal waveforms. Use the mV setting for
measuring the frequency of 3 volt or 5 volt logic level, square waveform signals.
The sensitivity of the frequency measurement function varies with the measurement range. To
automatically select a sensitivity level, measure the voltage or current rst, and then press Hz.
If the reading becomes unstable or reads zero, press the RANGE button to select a different
sensitivity level.
The number of bar graph elements indicates the sensitivity selected:
• 1 element = 6 V, 6 A, 60 mA, or 600 μA
• 2 elements = 60 V, 10 A, 600 mA, or 6000 μA
• 3 elements = 600 V
• 4 elements = 1000 V
• 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.
• EF: Set the meter to any current or voltage function. Press and hold until the meter beeps to
detect the electric eld that surrounds current-carrying conductors. Signal strength is
displayed as a series of dashes on the display.
• Use the tester’s built-in antenna (located along the top, near the LCD) for tracing live
circuits or locating a break in a wire.
• For more precision, such as distinguishing between current-carrying and ground wires,
connect a test lead to the ΩV input terminal and use it as a probe for direct contact
verication of AC voltage.

MM200A
8 9
• 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, CREST, or REC button or
turn the selector to OFF and then back on. To disable this feature, press SELECT while turning
the meter on.
Using the Features (cont'd)
• 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 rectication, multiplies it by 1.11, and displays the result. This method is
accurate if the input signal is a pure sine wave. The MM200 is an average-responding meter.
10
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 wave-
form. 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 DM-200A and DM-210A are average-responding meters.
The true RMS-reading method uses internal circuitry to read the true RMS value. This method is accu-
rate, 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 DM-510A 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*
(x)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 x.

10 11
Operation
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 specic 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.
12
Operation
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 Greenlee for technical assistance
at [phone].
4. Take the reading from the circuit or component to be tested.
Settings Table
To measure this
characteristic …
Set the
selector to this
symbol…
These icons will
appear on the
display …
Connect
the red
lead to…
Connect
the black
lead to …
All Models
Voltage
(1000 V max)
and V
ΩV COM
and V
Resistance
Ω
and press
SELECT
MΩ
ΩV COM
Continuity* and Ω
Diode diod (momentarily)
and V
Voltage (600 mV max)** mV mV ΩV COM
Current (8A max)** A mA
A, or A COM
Current (600mA max)** A mA
mA, or mA µA COM
Current (6000µA max)** µA
µA, or mA µA COM
This table continues on the next page.

MM200A
10 11
* Tone indicates continuity. The threshold is between 10 Ω and 80 Ω.
** Press SELECT for AC or DC, as required.
*** Logic level frequency has a xed sensitivity and is for digital signals. Refer to “Accuracy”.
† Refer to the “Using the Features” section for an explanation of EF (electric eld detection).
†† Discharge capacitor before measurement. Discharge a large capacitor through an
appropriate resistive load.
DM-200A • DM-210A • DM-510A
13
Operation (cont’d)
Settings Table (cont’d)
To measure this
characteristic …
Set the
selector to this
symbol…
These icons will
appear on the
display …
Connect
the red
lead to…
Connect
the black
lead to …
All Models (cont’d)
Frequency—Line Level
Voltage or Current , A, mA, or µA
and press Hz Hz ΩV COM
Frequency—Logic Level*** mV and press Hz Hz ΩV COM
EF
single probe† Any voltage or
current function
and press EF for
at least 1 second
E.F.
ΩV —
EF
non-contact† — —
DM-210A and DM-510A Only
Capacitance††
Ω
and press
SELECT
nF
Temp
ΩV COM
Temperature Temp
C or F
(press SELECT to
change scale)
Temp
ΩV COM
DM-510A Only
Auto select AC volts, DC volts,
resistance, and continuity (low
impedance measurement)
AutoCheck
and LoZ
Temp
ΩV COM
* Tone indicates continuity. The threshold is between 10 Ω and 80 Ω.
** Press SELECT for AC or DC, as required.
*** Logic level frequency has a fixed sensitivity and is for digital signals. Refer to “Accuracy”.
† Refer to the “Using the Features” section for an explanation of EF (electric field detection).
†† Discharge capacitor before measurement. Discharge a large capacitor through an appropriate
resistive load.

12 13
14
Typical Measurements
Voltage Measurement
Current Measurement

MM200A
12 13
Typical Measurements
Continuity Check
Diode Measurement
Forward Bias
Reverse Bias
Resistance Measurement

14 15
16
Typical Measurements
Temperature
Electric Field Detection (EF)
Refer to
“Using the Features”
for complete
instructions.
A–Non-contact
OR
B–Contact
A
B
DM-200A • DM-210A • DM-510A
17
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.
All Models
AC Voltage DC Voltage
Range
(50 Hz to 400 Hz) Accuracy Range Accuracy
60.00 mV ± (1.0% + 0.05 mV) 60.00 mV ± (0.4% + 0.05 mV)
600.0 mV ± (1.0% + 0.5 mV) 600.0 mV ± (0.2% + 0.3 mV)
6.000 V ± (1.0% + 0.005 V) 6.000 V ± (0.2% + 0.003 V)
60.00 V ± (1.0% + 0.05 V) 60.00 V ± (0.2% + 0.03 V)
600.0 V ± (1.0% + 0.5 V) 600.0 V ± (0.2% + 0.3 V)
1000 V ± (1.0% + 5 V) 1000 V ± (0.2% + 3 V)
Input Impedance: 10 MΩ // 50 pF Input Impedance: 10 MΩ // 50 pF
Resistance Diode Test
Measuring Range: 1.000 V
Test Current (typical): 0.56 mA
Open Circuit Voltage: < 1.8 VDC
Accuracy: ± (1.0% + 0.003 V)
Continuity
Tone Threshold: Between 10 Ω and 80 Ω
Response Time: < 32 ms
Range Accuracy
600.0 Ω ± (0.5% + 0.4 Ω)
6.000 kΩ ± (0.5% + 0.004 kΩ)
60.00 kΩ ± (0.5% + 0.04 kΩ)
600.0 kΩ ± (0.5% + 0.4k Ω)
6.000 MΩ ± (0.7% + 0.004 MΩ)
60.00 MΩ ± (1.2% + 0.04 MΩ)
Open Circuit Voltage: 0.45 VDC typical

MM200A
14 15
Accuracy (Cont'd)
DM-200A • DM-210A • DM-510A
17
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.
All Models
AC Voltage DC Voltage
Range
(50 Hz to 400 Hz) Accuracy Range Accuracy
60.00 mV ± (1.0% + 0.05 mV) 60.00 mV ± (0.4% + 0.05 mV)
600.0 mV ± (1.0% + 0.5 mV) 600.0 mV ± (0.2% + 0.3 mV)
6.000 V ± (1.0% + 0.005 V) 6.000 V ± (0.2% + 0.003 V)
60.00 V ± (1.0% + 0.05 V) 60.00 V ± (0.2% + 0.03 V)
600.0 V ± (1.0% + 0.5 V) 600.0 V ± (0.2% + 0.3 V)
1000 V ± (1.0% + 5 V) 1000 V ± (0.2% + 3 V)
Input Impedance: 10 MΩ // 50 pF Input Impedance: 10 MΩ // 50 pF
Resistance Diode Test
Measuring Range: 1.000 V
Test Current (typical): 0.56 mA
Open Circuit Voltage: < 1.8 VDC
Accuracy: ± (1.0% + 0.003 V)
Continuity
Tone Threshold: Between 10 Ω and 80 Ω
Response Time: < 32 ms
Range Accuracy
600.0 Ω ± (0.5% + 0.4 Ω)
6.000 kΩ ± (0.5% + 0.004 kΩ)
60.00 kΩ ± (0.5% + 0.04 kΩ)
600.0 kΩ ± (0.5% + 0.4k Ω)
6.000 MΩ ± (0.7% + 0.004 MΩ)
60.00 MΩ ± (1.2% + 0.04 MΩ)
Open Circuit Voltage: 0.45 VDC typical
18
AC Current
Range (50 Hz to 400 Hz) Accuracy Burden Voltage (typical)
600.0 µA ± (1.0% + 0.3 µA) 0.1 mV/µA
6000 µA ± (1.0% + 3 µA)
60.00 mA ± (1.0% + 0.03 mA) 1.7 mV/mA
600.0 mA ± (1.0% + 0.3 mA)
6.000 A ± (1.2% + 0.006 A) 0.03 V/A
8.00 A* ± (1.8% + 0.006 A)
DC Current
Range Accuracy Burden Voltage (typical)
600.0 µA ± (0.5% +0.5 µA) 0.1 mV/µA
6000 µA ± (0.5% + 3 µA)
60.00 mA ± (0.5% + 0.05 mA) 1.7 mV/mA
600.0 mA ± (0.5% + 0.3 mA)
6.000 A ± (1.2% + 0.006 A) 0.03 V/A
8.00 A* ± (1.8% + 0.006 A)
*8 A continuous, > 8 A to 15 A for 30 second max with 5 minutes cool down interval
Frequency—Hz (Line) at ACV, DCV, Current, AutoCheck™ Mode
Function Sensitivity (SineRMS) Range
6 V 0.4 V 10 Hz to 10 kHz
60 V 4 V 10 Hz to 50 kHz
600 V 40 V 10 Hz to 50 kHz
1000 V 400 V 45 Hz to 1 kHz
600 µA 40 µA 10 Hz to 10 kHz
6000 µA 400 µA 10 Hz to 10 kHz
60 mA 4 mA 10 Hz to 10 kHz
600 mA 40 mA 10 Hz to 10 kHz
6 A 1 A 10 Hz to 1 kHz
10 A 6 A 10 Hz to 1 kHz
Accuracy (cont’d)
All Models (cont’d)
*8 A continuous, > 8 A to 15 A for 30 second max with 5 minutes cool down interval
10.00 A*
10.00 A*
10A
10A
10A to 20A
10A to 20A

16 17
DM-200A • DM-210A • DM-510A
19
Accuracy (cont’d)
All Models (cont’d)
Accuracy of Frequency Ranges
Display Range Accuracy
10.00 Hz to 65.53 Hz ± (0.03% + 0.03 Hz)
65.5 Hz to 655.3 Hz ± (0.03% + 0.3 Hz)
0.655 kHz to 6.553 kHz ± (0.03% + 0.003 kHz)
6.55 kHz to 50.00 kHz ± (0.03% + 0.03 kHz)
Frequency—Logic Level Hz (mV Function)
Range Accuracy Sensitivity
(square wave)
5.0 Hz to 6.553 Hz ± (0.03% + 0.002 Hz)
3 V peak
6.55 Hz to 65.53 Hz ± (0.03% + 0.02 Hz)
65.5 Hz to 655.3 Hz ± (0.03% + 0.2 Hz)
0.655 kHz to 6.553 kHz ± (0.03% + 0.002 kHz)
6.55 kHz to 65.53 kHz ± (0.03% + 0.02 kHz)
65.5 kHz to 500.0 kHz ± (0.03% + 0.2 kHz)
500.0 kHz to 655.3 kHz ± (0.03% + 0.2 kHz) 5 V peak
0.655 MHz to 1.000 MHz ± (0.03% + 0.002 MHz)
Non-contact Electric Field Detection (EF)
Typical Voltage Bar Graph Indication*Frequency Range
10 V to 36 V –
50 Hz to 60 Hz
23 V to 83 V – –
59 V to 165 V – – –
124 V to 330 V – – – –
250 V to 1000 V – – – – –
* Bar graph indication and tone are proportional to signal strength
Accuracy (Cont'd)
Specications
Display: LCD (6000) and 24-segment bar graph
Polarity: Automatic
Sampling Rate:
Numeric Display: 5 per second
Bar Graph Display: 40 per second
Temperature Coecient: Nominal 0.15 x (specied accuracy) per °C below 18 °C or
above 28 °C
Automatic Power Off: After 34 minutes of inactivity.
To disable this feature, press SELECT while turning the meter on.

MM200A
16 17
Specications (Cont.)
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 > 100 dB at 0 Hz, 50 Hz and 60 Hz when measuring DCV
Operating Conditions:
Temperature: 0 °C to 40 °C (32 °F to 104 °F)
Relative Humidity (non-condensing): 80% maximum for temperatures up to 31 °C (88 °F),
decreasing linearly to 50% maximum at 40 °C (104 °F)
Altitude: 2000 m (6500') maximum
Indoor use only
Pollution Degree: 2
Storage Conditions:
Temperature: –20 °C to 60 °C (–4 °F to 140 °F)
Relative Humidity (non-condensing): 0% to 80%
Remove battery.
Battery: Two 1.5 V batteries (AAA, NEDA 24A or IEC LR03)
Safety: Double insulation per IEC/UL EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0, IEC/
EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and CAN/CSA-C22.2 No. 61010-1-12 Ed.
3.0 to Category II 1000V, CAT III 600V and CAT IV 300V AC & DC
Transient Protection: 6.5KV (1.2/50µs surge)
Overload Protections:
μA and mA: 0.4A/1000V DC/AC rms, IR 30KA@ 1000V DC/AC rms; Dimensions: 6 x 32 mm
A: 11A/1000V DC/AC rms, IR 20KA@ 1000V DC/AC rms; Dimensions: 10 x 38mm
V & AutoCheckTM: 1100V DC/AC rms
mV, Ohm & others: 1000V DC/AC rms
Overvoltage Categories:
Terminals (to COM) Measurement Category: V/mAµA / A : Category II 1000V, CAT III 600V and
CAT IV 300V AC & DC.
E.M.C: Meets EN61326-1:2013 (EN55022, EN61000-3-2, EN61000-3-3, EN61000-4-2, EN61000-
4-3, EN61000-4-4, EN61000-4-5, EN61000-4-6, EN61000-4-8, EN61000-4-11)
*Noise rejection is the ability to reject unwanted signals, or noise.
• Normal mode voltages are AC signals that can cause inaccurate DC measurements. NMRR
(Normal Mode Rejection Ratio) is a measure of the ability to lter out these signals.
• 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 lter out these signals.

18 19
Measurement Categories
These denitions 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 I
Signal level. Electronic and telecommunication equipment, or parts thereof. Some
examples include transient-protected electronic circuits inside photocopiers and
modems.
Measurement Category II
Local level. Appliances, portable equipment, and the circuits they are plugged into.
Some examples include light xtures, 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.
Statement of Conformity
Tempo Communications Inc. is certied 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).

MM200A
18 19
DM-200A • DM-210A • DM-510A
23
Maintenance
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:
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 and Fuses
1. Disconnect the unit from the circuit. Turn
the unit OFF.
2. Remove the rubber boot.
3. Remove the screw from the back cover.
4. Remove the back cover.
5. Replace and batteries (observe polarity)
and/or fuse(s).
6. Replace the cover, screw, and rubber boot.
Cleaning
Periodically wipe the case with a damp cloth
and mild detergent; do not use abrasives or
solvents.