Extech EX845 Operating Manual

User's Guide

Extech EX845 True RMS 1000 Amp Clamp Meter with Bluetooth

Patented

Introduction

Congratulations on your purchase of the Extech EX845 CAT IV True RMS 1000A Clamp Meter. This meter is supplied in the Meterlink kit and includes a Bluetooth module designed for use with the Flir T/B360, T/B400 or i/b60 cameras The combination of a clamp meter and an IR camera is used for electrical power measurement, analysis and documentation. The EX845 measurement functions include AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Duty Cycle, Diode Test, Continuity, Type k thermocouple thermometer plus Non-Contact IR Temperature. Proper use and care of this meter will provide many years of reliable service.

Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be present

Double insulation

SAFETY NOTES

• Do not exceed the maximum allowable input range of any function.

• Do not apply voltage to meter when resistance function is selected.

• Set the function switch OFF when the meter is not in use.

• Remove the battery if meter is to be stored for longer than 60 days.

WARNINGS

• Set function switch to the appropriate position before measuring.

• When measuring volts do not switch to current/resistance modes.

• Do not measure current on a circuit whose voltage exceeds 600V.

• When changing ranges always disconnect the test leads from the circuit under test.

Function Maximum Input

A AC, ADC 1000A DC/AC V DC, V AC 1000V DC/AC Resistance, Capacitance, Frequency, Diode Test 250V DC/AC Type K Temperature 60V DC, 24V AC

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CAUTIONS

• Improper use of this meter can cause damage, shock, injury or death. Read and understand this user manual before operating the meter.

• Always remove the test leads before replacing the battery or fuses.

• Inspect the condition of the test leads and the meter itself for any damage before

operating the meter. Repair or replace any damage before use.

• Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC. These voltages are considered a shock hazard.

• Always discharge capacitors and remove power from the device under test before performing Diode, Resistance or Continuity tests.

• Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the recessed electrical contacts. Other means should be used to ensure that the terminals are not "live".

• If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

• This device is not a toy and must not reach children’s hands. It contains hazardous objects as well as small parts that the children could swallow. In case a child swallows any of them, please contact a physician immediately

• Do not leave batteries and packing material lying around unattended; they can be dangerous for children if they use them as toys

• In case the device is going to be unused for an extended period of time, remove the batteries to prevent them from training

• Expired or damaged batteries can cause cauterization on contact with the skin. Always, therefore, use suitable hand gloves in such cases

• See that the batteries are not short-circuited. Do not throw batteries into the fire.

• Do not directly view or direct the laser pointer at an eye. Low power visible lasers

do not normally present a hazard, but may present some potential for hazard if viewed directly for extended periods of time

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Description

Meter Description

1. Current clamp

2. Clamp opening trigger

3. Data Hold Button

4. Mode

5. Peak

6. Range

7. DCA Zero (EX830 only)

8. MIN/MAX

9. Backlit LCD Display

10. Test lead input jacks

11. IR thermometer and laser pointer (rear)

12. Bluetooth/Backlight Button

13. Laser pointer button

14. Function switch

Display icons Description

HOLD Data Hold Minus sign Negative reading display 0 to 3999 Measurement display digits ZERO Zero P Peak value AUTO Auto Range mode DC/AC Direct Current / Alternating

MAX Max reading MIN Min reading Low battery mV or V Milli-volts or Volts (Voltage) Ω Ohms (Resistance) A Amperes (Current) F Farad (Capacitance) Hz Hertz (Frequency)

F and oC Fahrenheit and Celsius units (Temperature)

n, m, μ, M, k Unit of measure prefixes: nano, milli, micro, mega, and kilo

)

•

) Continuity test

Bluetooth active symbol

Current

Diode test Laser pointer

4 7

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Operation

NOTES: Read and understand all Warning and Caution statements in this operation manual prior to using this meter. Set the function select switch to the OFF position when the meter is not in use.

AC Current Measurements

WARNING: Ensure that the test leads are disconnected from the meter before making

current clamp measurements.

1. Set the Function switch to the A

DC range

or A

2. Press the trigger to open the jaw. Fully enclose only one conductor. For optimum results, center the conductor in the jaw.

3. The clamp meter LCD will display the reading.

DCA ZERO The DC Zero feature removes offset

values and improves accuracy for DC current measurements. To perform a zero, select ADC and with no conductor in the jaw:

1. Press the DC ZERO button to zero the display. “ZERO” will appear in the display. The offset value is now stored and removed from all measurements.

2. To view the stored value, press the DC ZERO button. “ZERO” will flash and the stored value will be displayed.

3. To exit this mode, press and Hold the ZERO button until “ZERO” is no longer in the display.

Correct

Incorrect

AC/DC Voltage Measurements

1. Insert the black test lead into the negative COM terminal and the red test lead into the positive V terminal.

2. Set the function switch to the V

3. Use the MODE button to select AC or DC Voltage).

4. Connect the test leads in parallel to the circuit under test.

5. Read the voltage measurement on the LCD display.

AC or VDC position.

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