DMM912, DMM914 & DMM916 Digital Multimeter Instructions
070-9791-01
1
Copyright Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents,
issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and
price change privileges reserved.
Printed in Hong Kong.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX, TEK, and TekTools are registered trademarks of
Tektronix, Inc.
WARRANTY SUMMARY
Tektronix warrants that the products it manufactures and
sells will be free from defects in materials and workmanship for a period of three years from the date of purchase
from an authorized Tektronix distributor. If a product or
CRT proves defective within the respective period,
Tektronix will provide repair or replacement as described
in the complete warranty statement.
To arrange for service or obtain a copy of the complete
warranty statement, please contact your nearest T ektronix
distributor .
EXCEPT AS PROVIDED IN THIS SUMMARY OR
THE APPLICABLE WARRANTY STATEMENT,
TEKTRONIX MAKES NO WARRANTY OF ANY
KIND, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OR
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
TEKTRONIX BE LIABLE FOR INDIRECT, SPECIAL
OR CONSEQUENTIAL DAMAGES.
Table of Contents
Safety 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description 1–5. . . . . . . . . . . . . . . . . . . . . . .
Front Panel Overview 1–7. . . . . . . . . . . . . . . . . . . . . .
Display indicators 1–8. . . . . . . . . . . . . . . . . . . . . . .
Buttons 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifted buttons 1–12. . . . . . . . . . . . . . . . . . . . . . . . .
Setup buttons 1–14. . . . . . . . . . . . . . . . . . . . . . . . . .
Rotary dial functions 1–16. . . . . . . . . . . . . . . . . . . . .
Input connectors 1–18. . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics 1–20. . . . . . . . . . . . . . . . . . . . . . . . . .
Safe test lead connections 1–21. . . . . . . . . . . . . . . . .
AC voltage measurements 1–22. . . . . . . . . . . . . . . . .
DC voltage measurements 1–23. . . . . . . . . . . . . . . .
AC + DC measurements 1–24. . . . . . . . . . . . . . . . . .
Frequency measurements 1–25. . . . . . . . . . . . . . . . .
Resistance measurements 1–26. . . . . . . . . . . . . . . .
Continuity checks 1–27. . . . . . . . . . . . . . . . . . . . . . .
Diode testing 1–28. . . . . . . . . . . . . . . . . . . . . . . . . .
Capacitance measurements 1–29. . . . . . . . . . . . . . .
Current measurements 1–30. . . . . . . . . . . . . . . . . . .
Temperature measurements 1–31. . . . . . . . . . . . . . .
DMM912/914/916
1–1
Special Feature Descriptions 1–32. . . . . . . . . . . . . . . . .
Auto power off 1–32. . . . . . . . . . . . . . . . . . . . . . . . .
Hold 1–32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto hold 1–32. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto fuse detection 1–32. . . . . . . . . . . . . . . . . . . . . .
Probe input guard 1–33. . . . . . . . . . . . . . . . . . . . . . .
Beeper 1–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HI/LO 1–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MIN/MAX/AVE operation 1–34. . . . . . . . . . . . . . . . . .
Battery and Fuse Replacement 1–35. . . . . . . . . . . . . . .
Specifications 1–36. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 1–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Care and Cleaning 1–46. . . . . . . . . . . . . . . . . .
1–2 DMM912/914/916
Safety
Review the following safety precautions to avoid injury
and prevent damage to this product or any products
connected to it. To avoid potential hazards, use the
product only as specified.
CAUTION. These statements identify conditions or
practices that could result in damage to the
equipment or other property.
WARNING. These statements identify conditions or
practices that could result in personal injury or
loss of life.
Symbols on the product
Refer to
manual
Double
Insulated
High
Voltage
Specific precautions
Use proper fuse. To avoid fire hazard, use only the fuse
type and rating specified for this product.
Do not operate without covers. To avoid personal injury, do
not apply any voltage or current to the product without
the covers in place.
Electric overload. Never apply a voltage to a connector on
the product that is outside the range specified for that
connector.
DMM912/914/916
1–3
Avoid electric shock. To avoid injury or loss of life, do not
connect or disconnect probes or test leads while they are
connected to a voltage source.
Do not operate in wet/damp conditions. To avoid electric
shock, do not operate this product in wet or damp conditions.
1–4
DMM912/914/916
Product Description
All three meters provide many features. Depending on
your meter type, all features described in this manual may
not apply.
The following list provides a comparison of the features
between meters.
Feature DMM912 DMM914 DMM916
40,000 display count D D D
Bargraph D D D
Centering and zooming D D
True RMS or average AC
measurements
Autorange D D D
Measurements
DC/AC voltage D D D
AC + DC voltage D D D
DC/AC current D D D
Resistance D D D
Frequency D D D
Diodes and capacitors D D D
Continuity D D D
Duty factor D D
Temperature D D
D D D
Decibel D
DMM912/914/916 1–5
Feature DMM916DMM914DMM912
AC volts and amps with Hz
display
Measurement hold D D D
Peak hold D
Minimum, maximum, and average
values
M/M/A time stamp D D
Delta mode D D D
HI/LO limits D D
Memory store and recall D D D
Backlight D
Automatic fuse verification D D D
Improper input connection
D D D
D D D
D D
warning
DMM912/914/9161–6
Front Panel Overview
4
3
2
1
1 Input connectors.
2 Measurement function dial. White labels are the initial
setting; blue labels are selected with the blue button.
3 Buttons, in conjunction with the dial, select instrument
functions.
4 LCD display with dual numeric readout.
DMM912/914/916 1–7
Display indicators
234 5
1
15
14
13
12
11 10
1
Auto range indicator
2 True RMS voltage indicator
3 Hold indicator
4 Auto Hold indicator
6
7
8
9
5 Peak Hold indicator
6 Upper display unit indicators
7 Main display unit indicators
8 Zoom indicator for bar graph
9 Diode check indicator
10 Maximum, Minimum, Maximum – Minimum, and
Average indicators
11 AC, DC, and AC+ DC voltage indicators
12 Battery indicator (low battery)
13 Memory indicator
DMM912/914/9161–8
14 High voltage input warning (>42 VDC, 30 VAC
15 Continuity indicator
Indicator Unit Indicator Unit
V Volts micro
A Amperes n nano
F Farad m milli
Hz Hertz M mega
min minute k kilo
_ F Fahrenheit delta
_ C Celsius % percent
ohm dB / dBm decibel
(1 V / 1 mV ref)
RMS
)
DMM912/914/916 1–9
Buttons
The blue button toggles between dual functions (white or
blue) located on the dial. It also exits the Setup mode.
Blue
button
STORE. The meter stores the present reading in memory
and the mem indicator is displayed momentarily. Use
RECALL to display the stored reading.
NOTE. The memory is erased anytime the meter
turns off.
SETUP. This button displays and scrolls through the user
adjustable menu items. Refer to page 1–14 for the Setup
menu functions.
BAR. This button scrolls through the types of bargraph
displays.
Zero at left
Zero at left, graph zoomed 10,
displayed
Zero at center
Zero at center (graph zoomed 10,
displayed)
Bar off
DMM912/914/9161–10
HOLD. This button toggles the hold mode on and off.
With hold on, the instrument beeps, freezes the display,
and displays the
RANGE. This button selects the manual ranging mode and
indicator.
then selects the range. The indicator turns off.
Press and hold the RANGE button for two seconds to
return the multimeter to auto-range mode (or turn the
dial).
M/M/A. This button scrolls through the MIN, MAX, MAX
– MIN, and AVG functions. Elapsed time from beginning
of test to the latest event appears in the upper display.
Events must be stable for 100 ms. The warning beeper
signals if the function is not applicable. Refer to page
1–34 for more details about these functions.
NOTE. You may want to adjust the auto power off
time limit. Refer to page 1–32 about auto power
off.
DMM912/914/916 1–11
Shifted buttons
The gold button shifts the button functions to the gold
labels. GOLd is displayed while shift is activated.
Gold
button
LIGHT. Push to activate the LCD backlight. Press the gold
button twice or hold down until the light turns on. Repeat
to turn off. Refer to page 1–15 about auto off time
adjustment.
HI/LO. Push to put the meter in a comparison mode,
comparing present readings to high and low limits
defined in the Setup menu. The beeper signals pass or
fail.
RECALL. Push to display the memory information. The
mem indicator appears in the display. Press again to
return to the set function display.
RESET. Push to set the minimum, maximum, average, and
peak hold values to the displayed measurement. This also
sets the timer to zero.
DMM912/914/9161–12
/ %. Push to enter the delta display mode, displaying the
difference (delta) between the measured value and a
reference value. The reference value is set when entering
Delta mode or using the Setup function. The difference is
displayed in the measurement units or as a percent
(selected by repeating the / % button press).
AUTO H. Hold mode is activated when a stable reading is
first achieved.
DIGITS. Push to toggle the display count between 40,000
and 4,000. The low count provides a faster response.
PEAK H . Peak hold operates similar to M/M/A except that
events as fast as 1 ms are captured and average values are
not available. The
indicator appears in the display.
Peak hold disables the bargraph. Peak hold operates for
DC volts.
DMM912/914/916 1–13
Setup buttons
SETUP. Push to display and scroll through a list of menu
prompts. Use these menus to adjust the meter operation or
sets values for various operations. Turning the meter off
does not affect saved setups.
. Scrolls left through the digits and polarity for selec-
tion.
. Scrolls right through the digits for selection.
+. Increases selected digit values or toggles default
settings.
–. Decreases selected digit values or toggles default
settings.
EXIT SETUP. Push to exit the setup mode, applying the
changes and saving them as new defaults. Turn the dial to
exit the setup mode, cancelling all changes.
DMM912/914/9161–14
The following table lists the prompts and a brief description of their action/purpose.
Display
prompt
1
rEF
Change the reference value (from the automatically
Parameter
set value) for delta measurements
HI L High limit
LO L Low limit
AG Average ACV or T rue RMS ACV
dB dBm or dB
bEEP Beeper ON/OFF
POFF
Auto power off time adjustment
2
bOFF Auto backlight off time adjustment
5060 50 or 60 Hz noise suppression
HAZ Hazard warning indicator off
1
2
Displayed only if Delta mode is active.
HI/LO, continuity, and probe input beepers are not
affected.
DMM912/914/916 1–15
Rotary dial functions
OFF. Turns the power off and erases display memory.
V / dBm / Hz. AC voltage measurements. Blue button
toggles upper readout between frequency and dBm (dB).
V . DC voltage measurements.
mV . High resolution DC voltage measurements for
voltages less than 400 mV.
AC + DC. Computes a true RMS voltage measurement
based on both the AC and DC components of the input
signal.
Hz / % DF. Frequency measurements. Blue button toggles
display reading to duty factor.
DMM912/914/9161–16
W / LV. Resistance measurements. Blue button toggles to a
low voltage source resistance measurement mode useful
for checking in-circuit components.
/ . Continuity checks. Blue button toggles to diode
check mode.
. Capacitance measurements.
mA . Current measurements up to 4,000 A. Blue
button toggles between DC and AC.
mA . Current measurements up to 400 mA. Blue button
toggles between DC and AC.
A . Current measurements of less than 10 A (20 A for
30 seconds). Blue button toggles between DC and AC.
_C / _F. Temperature measurements. Blue button toggles
between Celsius and Fahrenheit. Ambient temperature is
displayed in the upper readout.
DMM912/914/916 1–17
Input connectors
_C V W . Input connector for volts, ohms, frequency,
continuity, temperature, capacitance, and diode measurements.
COM. Common connector (ground reference). All mea-
surements are referenced to this connector.
WARNING. To avoid personal injury and product
damage, do not exceed more than a 1000 VDC
potential between the _C V
input or
between the COM connector or between earth
ground and these connectors.
Maximum open circuit voltage for the A mA
and A connectors is 600 V.
DMM912/914/9161–18
A mA. Input connector for current measurements up to
400 mA.
A. Input connector for current measurements up to 10 A
(20 A for 30 seconds).
Measurements above 10 A are possible with the follow-
ing restrictions:
H The maximum measurable current is 20 A.
H Limit measurements above 10 A to 30 seconds.
CAUTION. Limit large current measurements (10
to 20 A) to 30 seconds and allow two minutes of
cooling between measurements.
Do not connect to circuits with >600 V.
DMM912/914/916 1–19
Operating Basics
Before you take any of the measurements described in
this section, follow these steps to take the best measurements and avoid damaging the meter.
1. For improved accuracy, allow the meter to stabilize for
30 seconds after turning on the power.
2. Disconnect the test leads from the measurement points
when you select or change a measurement function.
3. Observe the safe test lead connections method on page
1–21 when removing the test leads from the meter.
4. Always disconnect power to the circuit when you
measure resistance, capacitors, check diodes, or check
continuity within the circuit.
Unstable or incorrect measurements may be displayed
when the meter is used near a circuit that emits electromagnetic waves.
DMM912/914/9161–20
Safe test lead connections
To safely disconnect the test leads from the meter, first
disconnect all test leads from the circuit being tested, then
disconnect the leads from the input connectors.
WARNING. To prevent electrical shock, do not
insert unnecessary test leads or metal pins into
the A mA and A connectors. Voltages applied to
the COM connector may be present at all other
input connectors.
Only use the test leads supplied or r ecommended
(or their equivalent) with the meter. Refer to
Accessories on page 1–45.
DMM912/914/916 1–21
AC voltage measurements
1. Set dial.
2. Choose dBm
(dB) or Hz.
3. Connect leads.
Blue button
AC voltage source
The AC measurement provides a true RMS or average
measurement of an AC signal. Select average in the Setup
menu.
NOTE. Frequency measurement accuracy and
range is increased using the main Hz dial
setting.
DMM912/914/9161–22
DC voltage measurements
1. Set dial.
2. Connect leads.
<400 mV
<1000 V
DC voltage source
The 400 mV setting provides one range for measuring
small voltages.
DMM912/914/916 1–23
AC + DC measurements
1. Set dial.
2. Connect leads.
0 V
0 V
The AC + DC measurement provides a true RMS equivalent voltage reading of the combined AC and DC components of a signal.
The formula
VRMS VAC
2
VDC
2
is used to
calculate the RMS voltage.
DMM912/914/9161–24
Frequency measurements
1. Set dial.
2. Choose
frequency or
duty factor.
3. Connect leads.
Blue button
ClockGround
The duty factor displays the percent of the signal that is
high.
DMM912/914/916 1–25
Resistance measurements
1. Set dial.
2. Choose low
voltage output.
3. Connect leads.
CAUTION. Remove all power from the circuit
before connecting the test leads.
Blue button
LV setting reduces the maximum test voltage level to
0.4 V to avoid turning on semiconductor devices. Display
count changes to 4,000.
Remove individual components from circuitry for best
results.
DMM912/914/9161–26
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