FLIR Extech Instruments EX840 Manual de usuario

User's Guide

Extech EX845

True RMS 1000 Amp Clamp Meter with

Bluetooth

Patented

SEND

EX845-EU-EN -V2.4-2/12

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/B200, T/B300, 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

EX845-EU-EN -V2.4-2/12

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

EX845-EU-EN -V2.4-2/12

Description

Meter Description

1. Current clamp

2. Clamp opening trigger

3. Data Hold Button

4. Mode

5. Peak

6. Range

7. DCA Zero

8. MIN/MAX

9. Backlit LCD Display

10. Test lead input jacks

11. IR thermometer and laser pointer (rear)

12. Bluetooth SEND/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

Current

MAX Max reading

MIN Min reading

Low battery

mV or V Milli-volts or Volts (Voltage)

ΩOhms (Resistance)

A Amperes (Current)

F Farad (Capacitance)

Hz Hertz (Frequency)

oF and oC Fahrenheit and Celsius units (Temperature)

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

•))) Continuity test

Diode test

Laser pointer

Bluetooth active symbol

SEND

EX845-EU-EN -V2.4-2/12

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 AAC or ADC

range

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.

AC/DC Voltage Measurements

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

into the positive Vterminal.

2. Set the function switch to the VAC or VDC position.

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.

Correct Incorrect

EX845-EU-EN -V2.4-2/12

Resistance Measurements

Note: Remove power before making resistance measurements

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

into the Ωpositive terminal.

2. Set the function switch to the Ω position.

3. Touch the test probe tips across the circuit or component under test.

4. Read the resistance on the LCD display.

Capacitance Measurements

WARNING: To avoid electric shock, discharge the capacitor under test before

measuring. If “dISC” appears in the display, remove and discharge

the capacitor.

1. Set the function switch to the capacitance position.

2. Insert the black test lead banana plug into the negative COM jack

and the red test lead banana plug into the CAP positive jack.

3. Press MODE to zero any stray capacitance.

4. Touch the test probe tips across the part under test.

5. Read the capacitance value in the display.

6. The display will indicate the proper decimal point and value.

Note: For very large values of capacitance measurement time can be several minutes

before the final reading stabilizes.

Frequency Measurements

1. Set the function switch to the V Hz Position.

2. Press and hold the MODE button to select the Frequency (Hz)

function. “k Hz” will appear in the display.

3. Insert the black test lead banana plug into the negative COM jack

and the red test lead banana plug into the Hz positive jack.

4. Touch the test probe tips across the part under test.

5. Read the Frequency value on the display.

6. The display will indicate the proper decimal point and value.

7. Press and hold the MODE button again to return to the voltage mode

CAP

EX845-EU-EN -V2.4-2/12

Type K Temperature Measurements

1. Set the function switch to the KTemp position.

2. Insert the Temperature Probe into the negative COM and the positive TEMP

jacks, observing polarity.

3. Touch the Temperature Probe tip to the device under test. Continue to

touch the part under test with the probe until the reading stabilizes.

4. Read the temperature on the display. The digital reading will indicate the

proper decimal point and value.

WARNING: To avoid electric shock, be sure the thermocouple probe has been

removed before changing to another measurement function.

Note: An open input or a temperature overrange the meter will display “OL” and

beep.

Note: See the “Temperature Units” paragraph to select °F or °C

Note: The temperature range of the supplied thermocouple probe is -20 to 250°C

(-4 to 482°F)

Continuity Measurements

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

positive terminal.

2. Set the function switch to the •)))position.

3. Use the MODE button to select continuity •))). The display icons will change when the MODE

button is pressed.

4. Touch the test probe tips across the circuit or component under test.

5. If the resistance is < 40Ω, a tone will sound.

Diode Test

1. Insert the black test lead banana plug into the negative COM jack and the red test

lead banana plug into the positive jack

2. Turn the function switch to position. Use the MODE button to select the diode function if

necessary (diode symbol will appear on the LCD when in Diode test mode)

3. Touch the test probe tips to the diode or semiconductor junction under test. Note the meter

reading

4. Reverse the test lead polarity by reversing the red and black leads. Note this reading

5. The diode or junction can be evaluated as follows:

If one reading displays a value (typically 0.400V to 0.900V) and the other reading displays

OL, the diode is good.

If both readings display OL the device is open.

If both readings are very small or ‘0’, the device is shorted.

EX845-EU-EN -V2.4-2/12

Non-Contact InfraRed Temperature Measurements

1. Set the function switch to the IR Temp position.

2. Aim the infrared sensor (rear of the meter) at the surface

to be measured.

3. Press the button in the center of the rotary function

switch to turn on the laser pointer and identify the

surface spot to be measured.

4. The area of the surface to be measured must be larger

than the spot size as determined by the distance to spot

size specification.

5. Read the temperature in the display.

Note: See the “Temperature Units” paragraph to select oF or oC

WARNING: 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.

IR Spot to Distance Diagram

The 8:1 spot to distance ratio determines the size of the measured surface area with respect to the

distance the meter is held away from the surface.

IR Measurement Notes

1. The object under test should be larger than the spot (target) size calculated by the field of view

diagram.

2. If the surface of the object under test is covered with frost, oil, grime, etc., clean before taking

measurements.

3. If an object's surface is highly reflective, apply masking tape or flat black paint to the surface

before measuring.

4. The meter may not make accurate measurements through transparent surfaces such as glass.

5. Steam, dust, smoke, etc. can obscure measurements.

6. To find a hot spot, aim the meter outside the area of interest then scan across (in an up and

down motion) until the hot spot is located.

10cm

1.25cm

20cm

2.5cm

60cm

7.5cm

Distance to object

Diameter of spot

EX845-EU-EN -V2.4-2/12

Data Hold

To freeze the LCD reading, press the HOLD button. While data hold is active, the HOLD icon

appears on the LCD. Press the HOLD button again to return to normal operation.

Peak Hold

The Peak Hold function captures the peak AC or DC voltage or current. The meter can capture

negative or positive peaks as fast as 1 millisecond in duration.

1. Turn the function switch to the A or V position.

2. Use the MODE button to select AC or DC

3. Allow time for the display to stabilize.

4. Press and Hold the PEAK button until “CAL” appears in the display. This procedure will zero

the range selected.

5. Press the PEAK button, Pmax will display.

6. The display will update each time a higher positive peak occurs.

7. Press the PEAK button again, Pmin will display. The display will now update and indicate the

lowest negative peak.

8. To return to normal operation, press and hold the PEAK button until the Pmin or Pmax

indicator switches off.

Note: If the Function switch position is changed after a calibration the Peak Hold calibration must

be repeated for the new function selected.

MAX/MIN

1. Press the MAX/MIN key to activate the MAX/MIN recording mode. The display icon "MAX" will

appear. The meter will display and hold the maximum reading and will update only when a new

“max” occurs.

2. Press the MAX/MIN key and “MIN” will appear The display icon "MIN" will appear. The meter

will display and hold the minimum reading and will update only when a new “min” occurs

3. Press the MAX/MIN key and a blinking “MAX MIN” will appear. The meter will display the

present reading, but will continue to update and store the max and min readings.

4. To exit MAX/MIN mode press and hold the MAX/MIN key for 2 seconds.

Temperature Units (˚F / ˚C)

The temperature units selection switch is located in the battery

compartment. To change the units, remove the battery door, lift out the

battery and set the switch for the desired units.

LCD Backlight Button

The LCD is equipped with backlighting for easier viewing, especially in

dimly lit areas. Press the backlight button to turn the backlight on. Press

again to turn the backlight off.

Automatic Power OFF

In order to conserve battery life, the meter will automatically turn off after approximately 10 minutes.

To turn the meter on again, turn the function switch to the OFF position and then to the desired

function position.

Units Switch

EX845-EU-EN -V2.4-2/12

Bluetooth Communication

The meter includes a Bluetooth module designed to communicate with the Flir T/B200, T/B300,

T/B360, T/B400 or i/b60 cameras The combination of a clamp meter and an IR camera is used for

analysis and documentation of temperature and current readings on single and three phase power

distribution panels.

Setup

1. Enable the EX845 bluetooth by pressing and holding the side Bluetooth SEND/Backlight button

for two seconds. On the second beep the bluetooth icon will appear in the display.

2. Pair the meter to the camera by following the “Pairing Bluetooth devices” section in the camera

manual.

3. Once paired, the data from the EX845 will be continuously displayed and updated on the

camera display.

Notes:

1. More than one meter can be paired with one camera to observe multiple legs in three phase

systems.

2. If a paired bluetooth device is removed from a camera list, perform a camera restore.

3. During initialization it can take up to 15 seconds to establish communication and display

results.

4. The data transmit function works in IR, Picture in Picture and Fusion modes, it does not work in

Digital camera mode.

5. If data stops appearing in the display, check that the bluetooth icon is active on the meter’s

display.

Image Editing

A single or series of readings can be applied to a single image by saving and entering the image

edit mode.

EX845

EX845 EX845 EX845

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