Tektronix CM-9930 User manual

2000 A DCA/ACA CLAMP + DMM, true rms
DCA/ACA
CLAMP METE
R
Model : CM-9930
Y
our purchase of this
DCA/ACA CLAMP METER
marks a step forward for
you into the field o
f
precision measurement.
A
lthough this CLAMP
METER is a complex and
delicate instrument, its
durable structure will
allow many years of use
if proper operating
techniques are
developed. Please read
the following
instructions carefully
and always keep this
manual within easy
reach.
OPERATION MANUAL

Caution Symbol
Caution :
* Risk of electric shock !
Caution :
* Do not apply the overload
voltage, current to the input
terminal !
* Remove test leads before open
the battery cover !
*Cleaning - Only use the dry
cloth to clean the plastic case !
Environment Conditions
* Installation categories III .
* Pollution Degree 2.
* Altitude up to 2000 meters.
* Relative humidity 80% max.

TABLE OF CONTENTS
1. FEATURES............................................................... 1
2. SPECIFICATIONS....................................................
.
1
2-1 General Specifications......................................... 1
2-2 Electrical Specifications....................................... 2
3. FRONT PANEL DESCRIPTION.................................... 4
4. PRECAUTIONS & PREPARATIONS FOR
MEASUREMENT........................................................ 5
5. MEASURING PROCEDURE......................................... 6
5-1 Symbols & Units of Display ............................................ 6
5-2 DCV, ACV Measurement ............................................... 7
5-3 Resistance Measurement................................................ 7
5-4 Continuity Check ........................................................... 7
5-5 Diode Test ...................................................................
.
8
5-6 AC Current Measurement ( Clamp on )............................ 9
5-7 DC Current Measurement ( Clamp on )...........................
.
9
5-8 AC Current Measurement ( Direct input ) .......................
.
10
5-9 DC Current Measurement ( Direct input ) .......................
.
10
5-10 Capacitance Measurement...............................................11
5-11 Frequency Measurement................................................. 11
5-12 Duty Cycle Measurement.................................................12
5-13 Data Hold Operation....................................................... 12
5-14 Relative Operation.......................................................... 12
5-15 Back Li
g
ht Operation......................................................
.
12
6. MAINTENANCE........................................................
.
13
6-1 Replacement of Battery....................................................
.
13
6-2 Replaacement of Fuse......................................................
.
13
7. OPTIONAL ACCESSORIES & ADAPTERS .................... 14
8. THE ADDRESS OF AFTER SERVICE CENTER...............15

1. FEATURES
* 2 in 1, 2000 A clamp meter + Digital multimeter.
* Design meet IEC 1010 CATIII 1000V safety requirement.
* True rms reading for ACV & ACA measurement.
* 4000 counts, Auto range, multi-functions for ACA,
DCA, ACV, DCV, Ohms, Capacitance, Hz, Duty cycle,
diode and continuity check.
* Wide ranges ( 2000A, 400 A ) clamp on current
measurement both for ACA & DCA.
* 4 ranges ( 400 uA, 4000 uA, 40 mA, 400 mA ) direct
current input measurement both for ACA & DCA.
* LSI circuit provides high reliability and durability.
* Overload protection circuit is provided for all ranges.
* Data hold, Relative key, Back light.
* Compact & heavy duty ABS and fireproof plastic case.
2. SPECIFICATIONS
2-1 General Specifications
Display 15 mm (0.6") LCD, 4 digits,
Max. indication 4000.
Measurement ACA, DCA, ACV, DCV, Ohms, Diode, Hz,
Range Capacitance, Duty cycle, Continuity beeper.
Polarity Automatic Switching, "-" indicates
negative polarity.
Current Sensor Hall effect sensor.
Zero adjustment DCA : Push bottom adjustment.
Other ranges : Automatic adjustment.
Over-input Indication of "1" or "-1".
Sampling Time Approx. 0.35 second.
Battery DC 9V battery, heavy duty or Alkaline type,
006P, MN1604 ( PP3) or equivalent.
Power Consump. Approx. DC 5 mA.
1

Operating Temp. 0 to 50 (32 to 122 ).℃℃℉ ℉
Operating Less than 80% RH.
Humidity
Weight 380 g/0.85 LB (including battery).
Dimension HWD : 255 x 73 x 38 mm.
(10 x 2.9 x 1.5 inch)
Max. Jaw 60 mm ( 2.36 inch ) Dia.
Open Size
Accessories Operation manual............................... 1 PC
Included
T
est lead (red & black)........................1 Set
Fuse ( 500 mA, 5 mm dia. x 20 mm ) ..1 PC
Optional Carrying case, Temperature Adapter,
Accessories
&
Light Adapter, Anemometer Adapter,
Adapters Pressure Adapter, RH Adapter,
* Ref. page 1
4
T
achometer Adapter, High Voltage Probe.
2-2 Electrical Specifications (23 ±5 )℃
Function Range Reso- Accuracy Overload
lution Protection
DC/AC 400 mV 0.1 mV ± ( 0.5 % + 2d )
Voltage (DC only)
4 V 0.001V DCV:
40 V
0.01V
± ( 1 % + 2d )
400 V 0.1 V ACV: AC/DC 1000 V.
1000V 1 V ± ( 1.2 % + 5d )
DC / AC 400 uA 0.1 uA
Current 4000 uA
1 uA
(Direct input) 40 m
A
0.01 mA ± ( 1.2% + 5d ) AC/DC 500 mA
400 m
A
0.1 mA ( Fuse )
DC /AC 400 A 0.1 A ± ( 2 % + 5 d )
current
(Clamp on)
2000 A
1 A
± ( 2 % + 8 d )
AC/DC
2000A/1000V
Remar
k
* True rms measurement both for ACV, ACA function.
* Input impedance for ACV & DCV range is 10 Mega ohm.
* ACA, ACV frequency response is from 45 to 1 KHz.
* ACA, ACV specification be tested on sine wave 50/60 Hz.
2

Function Range Reso-
A
ccuracy Overload
lution Protection
Ohms 400 ohm 0.1 ohm
4 K ohm 1 ohm
40 K ohm 10 ohm ± ( 1 % + 5 d )
400 K ohm 100 ohm
4 M ohm 1 K ohm ± ( 2 % + 2 d ) AC / DC 400V
40 M ohm 10Kohm ± ( 3.5 % + 5d )
Capacitance
50 nF 10 pF
500 nF 100 pF
5 uF 0.001 uF
± ( 3 % + 5d )
50 uF 0.01 uF * See Remark AC / DC 400V
Frequency 5 Hz 0.001 Hz
( > 5 V )
50 Hz 0.01 Hz
500 Hz 0.1 Hz
5 KHz 1 Hz
± (1 % + 5 d)
50 KHz 0.01 KHz
100 KHz 0.1 KHz AC / DC 1000V
Duty cycle 1 % to 0.1 %
99 %
Di
o
d
e
Sh
or
t/
non con
d
uc
t
ance, goo
d/d
e
f
ec
t
t
es
t
Continuity If rmeasuring esistance is less than 10 ohm, the
beeper will sound .
Remark :
*
Spec. tested under the environment RF Field Strengt
h
less than 3 V/M & frequency less than the 30 MHz only.
*
T
he accuracy of capacitance range are specified under tha
t
the " zero " procedure is executed before the measuremen
t
( push " REL. button, refer 5-10, page 11 ).
3

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Current Sense Jaws 3-9 Function button ( DC/AC, ohm,
3-2
T
rigger Continuity, Diode Capacitance )
3-3 Function indicator 3-10 Manual range select button
3-4 Function rotary switch 3-11 Display
3-5 DCA zero button 3-12 uA/mA direct current input
3-6 Relative button terminals
3-7 Data hold / Back light 3-13 V, ohm, Hz, Diode, Continuity,
button Capacitance input terminals
3-8 V/Hz/% ( Duty Cycle ) 3-14 Battery cover/Compartment
button 3-15 Stand
4

4. PRECAUTIONS & PREPARATIONS
FOR MEASUREMENT
1) Ensure that the DC 9V battery is connected to its snap
terminal with the right polarity and placed in the battery
compartment correctly.
2) Place the Red & Black Test Leads into the proper input
terminal before making measurement.
3) Remove either of the test leads from the circuit when
changing the measurement range.
4) Except operate the " Data Hold " function, it should
cancel the " Data Hold " function, otherwise the display
reading will freeze permanently.
5) Do not exceed the maximum rated voltage to the input
terminal.
6) Always switching the " Function Rotary Switch " to the
" Off " position when the instrument is not operation.
7) Remove the battery if the instrument is not to be used in
a long period of time.
8) Though the " Ohm " & " Capacitance " ranges build the
overload protection circuit, however it is prohibited to
apply any voltage to input terminal when making the
measurement.
9) The water resistance structure is apply for the
front panel only. Do not throw the instrument into
water, otherwise the meter will be damaged
permanently.
10
)
For safety consideration, when change the new test
leads, it should use the replace test leads that already
approval of " CATIII-1000V ".
5

5. MEASURING PROCEDURE
5-1 Symbols & units of display
Symbols / Descriptions
Units
Appears when selecting DCV or DCA mode.
Appears when selecting ACV & ACA mode.
Appears when the " Data hold " function is
operated.
Appears when the " Relative " function is
operated.
Battery voltage is under the low condition
already.
Appears when operating the " Automatic
range " mode.
Appears when the " Continuity beeper " is
operated.
mV, V Units for voltage measurements.
Ω, KΩ, MΩUnits for resistance measurements
Appears when the " Diode " function is
operated.
Appears when measuring a DCV or DCA
value is negative.
Back light
% Unit for " Duty cycle " measurement.
uA, mA,
A
Units for " Current " measurement.
Hz, KHz Units for " Frequency " measurement.
nF, uF Units for " Capacitance " measurement.
Appears when " Clamp on " current
measurement is operated.
6

5-2 DCV, ACV Measurement
1) Connect BLACK test lead into " COM " terminal.
2) Connect RED test lead into " V " terminal.
3) If measure " DCV ", select the " Function rotary switch "
( 3-4, Fig. 1 ) to the " V " position then push the
" FUNC. button " ( 3-9, Fig. 1 ) for display show " ".
4) If measure " ACV ", select the " Function rotary switch "
( 3-4, Fig. 1 ) to the " V " position then push the
" FUNC. button " ( 3-9, Fig. 1 ) for display show " ".
5) When LCD show the " AUTO " marker, the meter is
under the " auto range " mode., the meter will select the
suitable measurement range automatically.
6) Under the operation of " auto range " mode, push the
" Range button " ( 3-10 Fig. 1 ) will hold the range.
5-3 Resistance Measurement
1) Connect BLACK test lead into " COM " terminal.
2) Connect RED test lead into " Ω" terminal.
3) Select the " Function rotary switch " ( 3-4, Fig. 1 ) to the
" Ω" position then push the " FUNC. button "
( 3-9, Fig. 1 ) for display show " Ω".
4) When LCD show the " AUTO " marker, the meter is
under the " auto range " mode., the meter will select the
suitable measurement range automatically.
5) Under the operation of " auto range " mode, push the
" Range button " ( 3-10 Fig. 1 ) will hold the range.
5-4 Continuity Check
1) Connect BLACK test lead into " COM" terminal.
2) Connect RED test lead into " Ω" terminal.
3) Select the " Function rotary switch " ( 3-4, Fig. 1 ) to the
7