KLEIN TOOLS CL900 2000A Digital Clamp Meter Instruction Manual

KLEIN TOOLS CL900 2000A Digital Clamp Meter

Product Information

The Klein Tools CL900 is a digital clamp meter that features auto-ranging and true root mean square (TRMS) measurement technology. It can measure AC/DC current via the clamp and AC/DC voltage, resistance, continuity, frequency, duty cycle, capacitance, and test diodes via test leads. The meter also has a Low Impedance (LoZ) mode for identifying and eliminating ghost or stray voltages, as well as a dedicated mode for capturing Inrush Current. It is designed with double insulation, class II for safety.

The meter has the following specifications:

• AC/DC Current Measurement: 0.1 A – 2000 A
• AC/DC Voltage Measurement: 0.1 V – 1000 V
• Resistance Measurement: 0.1 Ω – 600.0 kΩ
• Continuity Measurement: 0.1 Ω
• Frequency Measurement: 0.001 Hz – 999.9 kHz
• Duty Cycle Measurement: 0.1% – 99.99%
• Capacitance Measurement: 60.00 nF – 600.0 μF

Product Usage Instructions

1. Ensure the device is properly powered by inserting fresh batteries or connecting it to a power source.
2. Turn on the device using the power switch.
3. Select the desired function using the function buttons.
4. To measure AC/DC current, open the clamp and position it around the conductor.
5. To measure AC/DC voltage, resistance, continuity, frequency, duty cycle, or capacitance, use the test leads and connect them to the appropriate terminals.
6. For Inrush Current measurement, use the dedicated Inrush button.
7. Use the Low Impedance (LoZ) mode to identify and eliminate ghost or stray voltages.
8. For diode testing, select the diode function and connect the test leads to the diode.
9. Read the measurement values on the display.
10. When finished using the meter, turn it off and store it in a safe place.
11. If the batteries need replacement, unscrew the battery cover and replace the old batteries with new ones.

Note : Ensure proper wire connection and follow safety guidelines for testing in different locations categorized as CAT III/CAT IV or CAT II.

GENERAL SPECIFICATIONS

Klein Tools CL900 is an auto-ranging, true root mean square (TRMS) digital clamp meter that measures AC/DC current via the clamp and measures AC/DC voltage, resistance, continuity, frequency, dutycycle, capacitance, and tests diodes via test-leads. It features a Low Impedance (LoZ) mode for identifying and eliminating ghost or stray voltages, and has a dedicated mode for capturing Inrush Current

• Operating Altitude: 6562 ft. (2000m)
• Relative Humidity: <80% non-condensing
• Operating Temperature: 32° to 122°F (0° to 50°C)
• Storage Temperature: 14° to 140°F (-10° to 60°C)
• Accuracy: Values stated at 65° to 83°F (18° to 28°C)
• Temp Coefficient: 0.1 x (Quoted Accuracy) per °C above 28°C or below 18°C, corrections are required when ambient working temp is outside of Accuracy Temp range
• Dimensions: 10.4″ x 3.9″ x 1.7″ (265 x 99 x 43 mm)
• Weight: 18.6 oz. (526 g) including batteries
• Calibration: Accurate for one year
• Standards:
  • Conforms to UL STD 61010-1, 61010-2-032,61010-2-033.
  • Certified to CSA STD C22.2 # 61010-1, 61010-2-032, 61010-2-033. IEC EN 61010-1, 61010-2-032,61010-2-033.
• Pollution degree: 2
• Accuracy: ± (% of reading + # of least significant digits)
• Drop Protection: 6.6 ft. (2m)
• Safety Rating: CAT IV 600V, CAT III 1000V, Class 2, Double insulation
  • CAT III: Measurement category III is applicable to test andmeasuring circuits connected to the distribution part of the building’s low-voltage MAINS installation.
  • CAT IV: Measurement category IV is applicable to test and measuring circuits connected at the source of the building’s low-voltage MAINS installation.
• Electromagnetic Environment: IEC EN 61326-1. This equipment meets requirements for use in basic and controlled electromagnetic environments like residential properties, business premises, and light-industrial location

Specifications subject to change

ELECTRICAL SPECIFICATIONS

• Input Impedance: 10MΩ Frequency Range: 50 to 400Hz

• Maximum Input: 1000V AC RMS or 1000V DC
  Accuracy specified from 5% to 100% of the measuring range

• AC Frequency Range: 50 to 60Hz , >500mA

• DC: >200mA (low current requires use of DC ZERO function)

• AC Frequency Range: 50 to 60Hz when auto-ranging >3A detectable (>2A if held in 600A range)

  • Accuracy specified assumes AC sine wave

• Maximum Input: 600V AC RMS or 600V DC

• Maximum Input: 600V AC RMS or 600V DC

• Sensitivity: >8V RMS, Maximum Input: 600V DC or 600V AC RMS

• Pulse width: 0.1ms – 100ms

• Frequency width: 5Hz to 10kHz

• Sensitivity: >8V RMS

• Maximum Input: 600V AC RMS or 600V DC

OTHER MEASUREMENT APPLICATIONS

• Diode Test: Max. 1.5mA, open circuit voltage ~ 3.0V DC
• Continuity Check: Audible signal <50Ω, test current <0.35mA
• Sampling Frequency: 3 samples per second
• Low Impedence (Low Z): Input impedence: >3kΩMax input: 600V RMS
• Auto Power off: After ~30 minutes of inactivity
• Overload: “OL” indicated on display, overload protection 1000V RMS in Voltage setting, 600V RMS in all other settings
• Polarity: “-” on display indicates negative polarity
• Non-Contact Voltage Detection: >90V AC
• Display: 3-5/6 digit, 6000 Count LCD

WARNINGS – GENERAL

To ensure safe operation and service of the meter, follow these instructions. Failure to observe these warnings can result in severe injury or death.

• Before each use verify meter operation by measuring a known voltage or current.
• Never use the meter on a circuit with voltages that exceed the category based rating of this meter.
• Do not use the meter during electrical storms or in wet weather.
• Do not use the meter or test leads if they appear to be damaged.
• Probe assemblies to be used for MAINS measurements shall meet IEC/EN 61010-031 with a voltage RATING of CAT IV 600V or better.
• Ensure meter leads are fully seated, and keep fingers away from the metal probe contacts when making measurements.
• Use caution when working with voltages above 25V AC RMS or 60V DC. Such voltages pose a shock hazard.
• To avoid false readings that can lead to electrical shock, replace batteries when a low battery indicator appears.
• Do not attempt to measure resistance or continuity on a live circuit.
• Always adhere to local and national safety codes. Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.
• To avoid risk of electric shock, disconnect leads from any voltage sourcebefore removing battery door.
• To avoid risk of electric shock, do not operate meter while battery door is removed

WARNINGS – NCV FUNCTION

• When NCV Function is initiated, a blinking or steady red glow and an audible beep indicate voltage present. If no indication, voltage could still be present.
• Before and after each use of the NCVT, verify operation by testing a knownworking circuit that is within the rating of this unit.
• Never assume neutral or ground wires are de-energized. Neutrals in multi-wire branch circuits may be energized when disconnected and must be retested before handling.
• The NCV tester WILL NOT detect voltage if:
  • The wire is shielded.
  • The operator is not grounded or is otherwise isolated from an effective earth ground.
  • The voltage is DC.
• The NCV tester MAY NOT detect voltage if:
  • The user is not holding the tester.
  • The user is insulated from the tester with a glove or other materials.
  • The wire is partially buried or in a grounded metal conduit.
  • The tester is at a distance from the voltage source.
  • The field created by the voltage source is blocked, dampened, or otherwise interfered with.
  • The frequency of the voltage is not a perfect sine wave between 50 and 60Hz.
  • The tester is outside of operation conditions (listed in Specifications section).
  • Operation may be affected by differences in socket design and insulation thickness and type; tester may not be compatible with some types of standard or tamper resistant (TR) electrical outlets.
  • Do not apply to uninsulated hazardous live conductors.
  • Detection above 50V is specified under “normal” conditions as specified below.
• The tester may detect at a different threshold at different conditions, or may not detect at all unless:
  • The tip of the tester is within 0.25″ of an AC voltage source radiating unimpeded.
  • The user is holding the body of the tester with his or her bare hand.
  • The user is standing on or connected to earth ground.
  • The air humidity is nominal (50% relative humidity).
  • The tester is held still.

SYMBOLS ON METER

SYMBOLS ON LCD

FEATURE DETAILS

1. 6000 count LCD display
2. Function selector switch
3. Clamp
4. “COM” jack
5. “VΩ” jack
6. Data Hold / Backlight button
7. “RANGE” button
8. “MAX/MIN” button
9. SEL (select) / DC Zero button
10. INRUSH button
11. Clamp trigger (press to open clamp)
12. Arrow markings
13. Non-contact Voltage Testing Button
14. Non-contact Voltage Testing Sensor
15. Non-contact Voltage Testing LED Indicator
16. Polarity markings(for DC current)

NOTE : There are no user-serviceable parts inside the meter.

ON/OFF
To power ON the meter, rotate the Function Selector switch 2 from the OFF setting to any measurement setting. To power OFF the meter, rotate the Function Selector switch 2 to the OFF setting. By default, the meter will automatically power OFF after aprox. 30 minutes of inactivity. To deactivate the auto power OFF functionality, press and hold the “SEL/DC ZERO” button 9 before powering ON from the OFF setting. When auto power OFF is deactivated, the Auto Power Off icon will not be visible in the display

SEL (SELECT) / DC ZERO BUTTON (FOR SECONDARY FUNCTIONS)
The SEL/DC ZERO button 9 activates the secondary function for each application accessible by the function selector switch 2 :

• In Current A and Low Impedance modes, it toggles between AC and DC measurements.
• In Frequency/Duty Cycle setting, it toggles between these measurements.
• In Continuity/Resistance/Diode-Test setting, it toggles through these measurements in order.
• In DC current setting, pressing and holding for more than one second initiates the DC ZERO function. Subsequent DC current measurements automatically subtract the measurement that was present as an offset correction.

The default function for each application is printed on the meter in white, the secondary functions in orange. An icon on the LCD display will indicate which function is active.

DATA HOLD
Press the Data Hold / Backlight button 6 to hold the measurement on the display. Press again to release the display to return to live measuring.

BACKLIGHT
Press and hold the Data Hold / Backlight button 6 for more than one second to turn ON the backlight. The backlight will automatically power OFF after 3 minutes of inactivity.

RANGE
The meter defaults to auto-ranging mode AUTO. This mode automatically determines the most appropriate measurement range for the testing that is being conducted. To manually force the meter to measure in a different range, use the Range button 7 .

1. Press the “RANGE” button 7 to manually select measurement range (AUTO is deactivated on the LCD). Repeatedly press the “RANGE” button 7 to cycle through the available ranges, stopping once the desired range is reached.
2. To return to auto-ranging mode, press and hold the “RANGE” button 7 for more than one second (AUTO is reactivated).

MAX/MIN
When the “MAX/MIN” button 8 is pressed, the meter keeps track of the Maximum and Minimum values as the meter continues to take samples.

1. When measuring, press “MAX/MIN” button 8 to toggle between the Maximum value (MAX) and Minimum value (MIN). If a new Maximum or Minimum, the display will update with the new value.
2. Press “MAX/MIN” button 8 for more than one second to return to normal measuring mode

INRUSH CURRENT
Rotate the Function Selector switch 2 to the Current A setting and press INRUSH 10 prior to an inrush event to test for inrush current. While the meter monitors current waiting for the inrush event, “—-” will be visible on the display.

NON-CONTACT VOLTAGE TESTING
Press and hold the “NCV” button 13 to test for AC voltage using the integrated non-contact voltage tester. Approach the conductor under test leading with the sensing antenna 14 . The meter delivers visual warning signals via the LED indicator 15 and audible signals (beeps) when AC voltage is detected. Release the “NCV” button to exit NCV testing mode.
NOTE : It is not recommended to perform continuity and NCV testing simultaneously, as both tests utilize the same audible signal, making it difficult to resolve which test is responsible for the audible alarm. NOTE: Only voltages of 90V AC or greater will be detected.

OPERATING INSTRUCTIONS

CONNECTING TEST LEADS
Do not test if leads are improperly seated. Results could cause intermittent display readings. To ensure proper connection, firmly press leads into the input jack completely

TESTING IN CAT III / CAT IV MEASUREMENT LOCATIONS
Ensure the test lead shield is pressed firmly in place. Failure to use the CATIII / CATIV shield increases arc-flash risk.

TESTING IN CAT II MEASUREMENT LOCATIONS
CAT III / CAT IV shields may be removed for CAT II locations. This will allow testing on recessed conductors such as standard wall outlets. Take care not to lose the shields

AC/DC CURRENT (LESS THAN 2000A)
AC Current is measured by pressing the clamp trigger 11 to open the clamp 3 and placing it around a current-carrying wire. When measuring, care should be taken to ensure that the clamp 3 is completely closed with trigger 11 fully released, and that the wire passes perpendicularly through the center of the clamp 3 in line with the arrow markings 12 .
NOTE : Current measurement can be made by clamping around single conductors, but not cables containing both live and neutral wires. In this case a line splitter is required, Klein Cat. No. 69409 is recommended

To measure current:

1. Rotate the Function Selector switch 2 to the Current A setting.

2. The meter defaults to AC measurement. To measure DC, press the “SEL/DC ZERO” button 9 to toggle between AC and DC modes. The AC or DC icon on the LCD indicates which mode is selected.
   Note or on the display.

3. Place the clamp 3 around the wire.
   When measuring DC current, align the polarity markings 16 on the clamp with the polarity of the wire to avoid negative readings. The current measurement will be shown in the display. The meter will auto-range to display the measurement in the most appropriate range

To measure inrush current:

1. Rotate the Function Selector switch 2 to the Current A setting. Place the clamp 3 around the wire and press “INRUSH” 10 . The Display 1 will show “—-“. Initiate the Inrush event and the inrush current will be captured and presented in the display. A second press of “INRUSH” 10 will reset the Inrush measurement, “—-” will be presented on the display and the meter will wait for the next Inrush event.
   NOTE : The Inrush measurement period is 100 milliseconds, with a 20 millisecond sampling rate.

2. Press and hold “INRUSH” 10 for more than one second to return to normal measuring mode.
   Disconnect test leads when measuring with the clamp.
   NOTE : If non-zero values are displayed prior to measuring in DC current mode, an offset correction may be required to improve accuracy. With meter in DC current mode, press and hold the “SEL/DC ZERO” button 9 for more than one second to initiate the DC current ZERO function. Subsequent DC current measurements automatically subtract the measurement that was initially present as an offset correction

AC/DC VOLTAGE (LESS THAN 1000V)

1. Insert RED test lead into VΩ jack 5 , and BLACK test lead into COM jack 4 , and rotate function selector switch 2 to the AC voltage V or DC voltage V setting. The AC or DC icon o the LCD indicates which setting is selected.

2. Apply test leads to the circuit to be tested to measure voltage.
   The meter will auto-range to display the measurement in the most appropriate range.
   NOTE : If “–” appears on the LCD, the test leads are being applied to the circuit in reverse. Swap the position of the leads to correct this.
   NOTE : When in a voltage setting and the test leads are open, readings of order mV may appear on the display. This is noise and is normal. By touching the test leads together to close the circuit the meter will measure zero volts
   Do not attempt to measure voltages greater than 1000V in any Voltage setting.
   AC/DC LoZ VOLTAGE (LESS THAN 600V)
   Insert RED test lead into VΩ jack 5 , and BLACK test lead into COM jack 4 , and rotate function selector switch 2 to the AC/DC LoZ voltage setting. The meter defaults to AC measurement. To measure DC, press the “SEL/DC ZERO” button 9 to toggle between AC and DC modes. The AC or DC icon on the LCD indicates which mode is selected. Note or on the display

3. Apply test leads to the circuit to be tested to measure voltage.
   The meter will auto-range to display the measurement in the most appropriate range.
   Do not attempt to measure voltages greater than 600V in LoZ setting

CONTINUITY

1. Insert RED test lead into VΩ jack 5 , and BLACK test lead into COM jack 4 , and rotate function selector switch 2 to the Continuity/Resistance/Diode-Test setting
   NOTE : The meter defaults to Continuity testing in this setting.
   Ensure that the Continuity Testing icon is visible on the display. If not, press the “SEL/DC ZERO” button 9 repeatedly until the icon is shown.

2. Remove power from the circuit.

3. Test for continuity by connecting the conductor or circuit with test leads. If resistance is measured less than 50Ω, an audible signal will sound and the display will show a resistance value indicating continuity. If the circuit is open, the display will show “OL”.
   DO NOT attempt to measure continuity on a live circuit.

RESISTANCE MEASUREMENTS

1. Insert RED test lead into VΩ jack 5 , and BLACK test leads into COM jack 4 , and rotate function selector switch 2 to the Continuity/Resistance/Diode-Test setting.
   NOTE : The meter defaults to Continuity testing in this mode. Press the SEL/DC ZERO” button 9 once to enter Resistance testing mode. The Resistance icon will appear on the display.

2. Remove power from circuit.

3. Measure resistance by connecting test leads to the circuit. The meter will auto-range to display the measurement in the most appropriate range

NOTE : When in a Resistance setting and the test leads are open (not connected across a resistor), or when a failed resistor is under test, the display will indicate O.L. This is normal.
DO NOT attempt to measure resistance on a live circuit

DIODE TEST

1. Insert the RED test lead into VΩ jack 5 , and BLACK test leads into COM jack 4 , and rotate function selector switch 2 to theContinuity/Resistance/Diode-Test setting.
   NOTE : The meter defaults to Continuity testing in this mode. Press the SEL/DC ZERO” button 9 twice to enter Diode testing mode. The Diode icon will appear on the display.

2. Touch test leads to the diode. A reading of 200-800mV on display indicates forward bias, and “OL” indicates reverse bias. An open device will show “OL” in both polarities. A shorted device will show approximately 0mV.

FREQUENCY / DUTY-CYCLE

1. Insert the RED test lead into VΩ jack 5 and BLACK test lead into COM jack 4 , and rotate function selector switch 2 to the Frequency/Duty-Cycle setting.
   NOTE:  The meter defaults to Frequency testing. To test Duty-Cycle, press the “SEL/DC ZERO” button 9 once. Ensure that the appropriate icon (either Hz or %) appears on the display.

2. Measure by connecting test leads across the circuit

CAPACITANCE

1. Insert the RED test lead into VΩ jack 5 , and BLACK test leads into COM jack 4 and rotate function selector switch 2 to the Capacitance setting.
2. Remove power from the circuit.
3. Measure capacitance by connecting test leads across the capacitor. The meter will auto-range to display the measurement in the most appropriate range

MAINTENANCE

BATTERY REPLACEMENT
When the indicator is displayed on the LCD, the batteries must be replaced.

1. Loosen screw on the battery door.
2. Replace 2 x AAA batteries (note proper polarity).
3. Replace the battery door and fasten it securely with a screw.

To avoid the risk of electric shock, disconnect leads from any voltage source before removing the battery door.
To avoid the risk of electric shock, do not operate the meter while the battery door is removed

CLEANING
Be sure the meter is turned off and wipe with a clean, dry lint-free cloth. Do not use abrasive cleaners or solvents.

STORAGE
Remove the batteries when the meter is not in use for a prolonged period. Do not be exposed to high temperatures or humidity. After a period of storage in extreme conditions exceeding the limits mentioned in the General Specifications section, allow the meter to return to normal operating conditions before use.

FCC & IC COMPLIANCE

See this product’s page at www.kleintools.com for FCC compliance information.
Canada ICES-003 (B) / NMB-003 (B)

WARRANTY

www.kleintools.com/warranty

DISPOSAL / RECYCLE
Do not place equipment and its accessories in the trash. Items must be properly disposed of by local regulations. Please see www.epa.gov/recycle for additional information.

CUSTOMER SERVICE
KLEIN TOOLS, INC. 450 Bond Street Lincolnshire, IL 60069 1-800-553-4676
customerservice@kleintools.com
www.kleintools.com

References

• Reduce, Reuse, Recycle | US EPA

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