Isotech 2000 User manual

DC/AC CLAMP METER
ISO-TECH 2000
USERS MANUAL

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Warnings and Safety symbols:
Caution, refer to this manual before using the meter.
Dangerous voltages.
Meter is protected throughout by double insulation or
reinforced insulation.
Comply with IEC1010-1
When servicing, use only specified replacement
parts.

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TABLE OF CONTENTS
1.Features............................................................................................................... 1
2. Panel Description............................................................................................... 2
3.Operation Instructions......................................................................................... 5
3.1. DC/AC Current Measurements.................................................................. 5
3.2. DC/AC Voltage Measurements................................................................. 7
3.3. Resistance Measurement............................................................................ 8
3.4. Continuity Measurement............................................................................ 8
3.5. Change from Auto-range Mode to Manual Mode...................................... 9
3.6. Relative Reading Measurements................................................................ 9
3.7. Holding the LCD Reading......................................................................... 9
3.8. Finding the MAX/MIN Value ................................................................... 9
4.Specifications..................................................................................................... 10
5.Battery Replacement.......................................................................................... 13
6. Maintenance & Cleaning................................................................................... 14

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1.Features1.Features
1. Accurate DC/AC digital clamp meter for current measurement.
2. DC 2500A, AC 2100A (True RMS ).
3. φ55 mm diameter jaw.
4. One touch zero for DCA adjustment.
5. Auto-range for A, V, amd Ω.
6. Large 3 3/4 digits LCD
6. Fast bargraph display (20 times/sec.) for transient observation.
7. Continuity with buzzer.
8. Max/Min and Data Hold functions.
9. 600V overload protection for ohm measurement.
10. Easy single rotary switch for any function selection.

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2. Panel Description. Panel Description

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1. Transformer Jaw
This is used to pick up a current signal. To measure DC/AC current, a conductor
must be enclosed by the jaws.
2. Transformer Trigger
This is used to open the jaws.
3. Data Hold Button
Press this button to hold the current reading in the LCD display. Press it again to
release the HOLD function .
4. Function Selection and On/Off Switch
This is used to select the desired function, such as DCA, ACA, DCV, ACV, Hz, Ohm
and Continuity.
5. Data Hold Symbol
Once the hold button is pressed, this symbol appears in the LCD display.
6. Max/Min Hold Symbol
Once the max/min button is pressed, either MAX or MIN shall be displayed on LCD
7. Units Symbols
Once a function is selected, the corresponding unit (V, Ω, A, or Hz) shall be
displayed on LCD.
8. LCD
This is a 3 3/4 digit Liquid Crystal Display with maximum indication of 3999.
Function symbols, units, bargraph, sign, decimal points, low battery symbols,
max/min symbols, and zero symbol are included.
9. Zero/Relative Symbol
When this symbol appears, it means a reference value has been subtracted from the
actual reading. The reading shown is an offseted value. Press and hold the zero
button for 2 seconds to disable this function.
10. Low Battery Symbol
When this symbol appears, it indicates that the battery voltage has dropped below the
minimum required voltage. Refer to Section V for battery replacement.
11. Analogue Bargraph
The Bargraph has forty segments. It displays segments proportional to the actual
reading. Each segment represent ten counts.

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12. Relative Button
Once this button is pressed, the current reading shall be set to zero and be used as a
zero reference value for all other subsequent measurement. The function can also be
used to offset readings caused by the residual magnetism remaining in the core for
DC current measurements. Once this button is pressed, the clamp meter will change
to manual mode instead of auto-range mode. The Relative function will be disabled
if Max/Min function is enabled.
13 DCA ZERO button
This button is used for DCA ZERO function. To zero the DCA residual value, press
this button until the LCD displays zero. If the DCA ZERO button is used to zero a
DCA value, the clamp meter is still in auto-range mode. ( It is different from the the
relative button which forces the clamp meter change to manual mode.)
14. Max/Min Hold Button
This button is used to enable the maximum or minimum value to be displayed and
updated during measurement. Press it once and the minimum value shall be
displayed and updated. Press it again and the maximum value shall be displayed and
updated. Press it again (the third push) and the clamp meter returns to normal
measurement mode. The Zero function will be disabled if MAX/MIN is enabled.
15. RANGE button
Once the button is pressed, the clamp meter goes into manual mode. To select the
desired range, press and release the button once. To return to the autorange mode,
press and hold the button for more than 2 seconds.
16.COMTerminal
This terminal is used as common reference input.
17.VΩInput Terminal
This terminal is used as an input for voltage, ohm/continuity, or frequency
measurements.

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3.Operation Instructions.Operation Instructions
3.1. DC/AC Current Measurements
WARNING
Make sure that all the test leads are disconnected from the meter’s terminals for
current measurement.
3.1.1. DC Current

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a. Set the rotary switch at DCA.
b. Push and hold the DCA ZERO button until the reading shows zero.
c. Press the trigger to open the jaws and fully enclose the conductor to be measured.
No air gap is allowed between the two half jaws.
d. The clamp meter will automatically select the appropriate range. If the user wants
to select a range manually, press the range button before pressing the DCA ZERO
button.
e. Read the measured value from the LCD display.
Note
There are two ways to zero the DCA residual value. Use the DCA zero button
and the clamp meter is in auto-range mode. Use the REL button and the clamp
meter will change to manual mode for DCA measurement.
3.1.2. AC Current