Omega Products HHM290-SC Installation Manual

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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification
of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certificat ion.
The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it contains,
and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for,
patient-connected application.

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO

RETURN REQUESTS / INQUIRIES

OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA'S CUSTOMER SERVICE DEPARTMENT
(IN ORDER T O AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on
any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR WARRANTY RETURNS, please have the following

information available BEFORE contacting OMEGA:

1.Purchase Order number under which the product was
PURCHASED,

2.Model and serial number of the product under warranty, and

3.Repair instructions and/or specific problems relative to the
product.

OMEGA's policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest
in technology and engineering. OMEGA is a registered trademark of OMEGA ENGINEERING, INC. © Copyright 2001 OMEGA ENGINEERING,
INC. All rights reser ved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or
machine-readable from, in whole or in part, without prior written consent of OMEGA ENGINEERING, INC.

PATENT NOTICE:

U.S. PAT. 6,095,682; 6,123,453; B1 5,368,392; 5,524,984; 5,727,880; 5,465,838; 5,823,678; 5,823,679
European Patent No. 0644408 Other Patents Pending.

FOR NON-WARRANTY REPAIRS, consult OMEGA for

current repair charges. Have the following information
available BEFORE contacting OMEGA:

1.Purchase Order number to cover the COST of the repair,

2.Model and serial number of the product, and

3.Repair instructions and/or specific problems relative to the
product.

SAFETY INFORMATION

• Do Not use the meter if the meter or the test leads look
damaged, or if you suspect that the meter is not operating
properly.

• This meter is not recommended for high voltage industrial use.
For example, it is not recommended for 440 VAC or 600 VAC
industrial power mains measurement. The unit is intended for
use as follows:

- Low energy circuits up to 1000 VDC or 750 VAC.

- High energy circuits up to 250 VAC or VDC.
Accidental misuse by connection across a high voltage, high
energy power source when the meter is set up for current (mA)
measurement may be very hazardous.

• Do Not Operate the meter with the two test leads and the
thermocouple probe connected at the same time. Unplug the
test leads from the meter before making thermocouple tem­perature measurement. Unplug the thermocouple probe from
the meter before making other types of measurements.

• Use caution when working above 60 VDC or 30 VAC. Such
voltages pose a shock hazard.

• Turn off power to the circuit under test before cutting,
unsoldering, or breaking the circuit. Small amounts of current
can be dangerous.

• When using the test leads, keep your fingers behind the finger
guards.

• Measuring voltages which exceeds the limits of this multimeter
may damage the meter and expose the operator to a shock
hazard. Always recognize the voltage limits as stated in this
manual and on the meter.

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

• Do Not Operate the meter in flammable or explosive environ­ments.

• Protect the meter from moisture.

• Operate the meter with the two test leads provided.

• Do Not Operate the meter when the Battery Door is open.

ACCESSORIES
Model No. Description
HHM290-SC Soft Carrying Case

HHM-TL Repalcement Test Leads
OS520-Adapter-110V 110 VAC Adapter, 9 VDC @ 200mA
OS520-Adapter-220V 220 VAC Adapter, 9 VDC @ 200mA

1

CAUTION

• USE OF CONTROLS OR ADJUSTMENTS OR
PERFORMANCE OF PROCEDURES OTHER THAN
THOSE SPECIFIED HERE MAY RESULT IN HAZARDOUS
LASER RADIATION EXPOSURE.

• DO NOT LOOK AT THE LASER BEAM COMING OUT OF
THE LENS OR VIEW DIRECTLY WITH OPTICAL
INSTRUMENTS. EYE DAMAGE CAN RESULT.

• USE EXTREME CAUTION WHEN OPERATING THE
LASER SIGHTING.

• NEVER POINT THE LASER BEAM AT A PERSON.

• KEEP OUT OF REACH OF ALL CHILDREN.

• DO NOT ATTEMPT TO OPEN THE MULTI-METER OR

LASER SIGHTING THERE ARE NO USER-SERVICEABLE
PARTS.

• DO NOT OPEN BATTERIES, DISPOSE OF IN FIRE, HEAT
ABOVE 100°C (212°F), EXPOSE CONTENTS TO WATER,
RECHARGE, PUT IN BACKWARDS, MIX WITH USED OR
OTHER BATTERY TYPES. IT MAY EXPLODE OR LEAK
AND CAUSE PERSONAL INJURY.

• DO NOT USE THE METER NEAR ANY DEVICE THAT
GENERATES STRONG ELECTROMAGNETIC RADIA­TION, IT MAY CAUSE TEMPORARY ERROR IN READ­ING.

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of

WARRANTY / DISCLAIMER

purchase. OMEGA's W arranty adds an additional one (1) month gr ace period to the normal one (1) year product warranty to co ver handling and
shipping time. This ensures that OMEGA's customers receive maximum coverage on each product.If the unit malfunctions, it must be returned
to the factory for evaluation. OMEGA's Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or
written request. Upon examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no charge. OMEGA's
WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing,
operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having
been tampered with or shows evidence of having being damaged as a result of excessive corrosion; or current, heat moisture or vibration;
improper specification; misapplication; misuse or other operating conditions outside of OMEGA's control. Components which wear are not
warranted, including but not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any
omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information
provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and free of
defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED,
EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A
P ARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMIT A TION OF LIABILITY : The remedies of purchaser set f orth herein are exclusive
and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict
liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be
liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a "Basic Component" under 10 CFR 21 (NRC),
used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any
nuclear installation or activity , medical application, used on humans, or misused in any wa y, OMEGA assumes no responsibility a s set f orth in our
basic WARRANTY / DISCLAIMER language , and additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or
damage whatsoever arising out of the use of the Product(s) in such a manner.

2

MAINTENANCE

WARNING

Remove test leads before changing battery or fuse

or performing any servicing.

Battery Replacement

Power is supplied by 6 pcs 1.5V (AA size) battery (UM-3 R6).
The " " appears on the LCD display when replacement is needed.
To replace the battery, remove the two screws from the back of the
meter and lift off the battery case. Remove the battery from battery
contacts.

Fuse Replacement

If no current measurements are possible, check for a blown
overload protection fuse. There are two fuses; F1 for the "mA" jack
and F2 for the "10A" jack. For access to fuses, remove the two
screws from the back of the meter and lift off the battery case.
Replace F1 only with the original type 10A/600V, fast acting fuse.
Replace F2 only with the original type 0.5A/250V, fast acting
ceramic fuse.

Cleaning

Periodically wipe the case with a damp cloth and detergent, do
not use abrasives or solvents. Clean the front lens by blowing off
loose particles or using a damp, soft, clean cloth.

Laser Aperture

Laser Switch

Laser Warning

& Certification

Label

Function Switch

Terminal Jacks

DC Adapter

Input

®

TrueRMS SUPERMETER

Infrared Measurement

Dual Thermocouple
Input (K type T/C)

TM

Analog Bar Graph

Custom Made
Backlit LCD

Terminal Socket
for Inductance &
Capacitance
Measurement

Back View Of Supermeter

Battery Door Open

Batteries
AA Size (6)

Fuse, 10A / 600V

Fuse, 0.5A / 250V

14

3

Safety Warnings and IEC Symbols

This device is marked with international safety and hazard sym­bols in accordance with IEC 1010. It is important to read and follow
all precautions and instructions in this manual before operating or
commissioning this device as it contains important information
relating to safety and EMC. Failure to follow all safety precautions
may result in injury and or damage to your equipment. Use of this
device in a manner not specified by the manufacturer may impair
protection provided within the unit.

IEC symbols Description

Caution-Risk of Electric shock

Caution-Refer to Accompanying documents
Direct Current

Alternating Current

Earth (Ground) Terminal

Equipment protected throughout by Double
Insulation

Laser Symbol

Before taking any measurements, read the Safety Information
Section. Always examine the instrument for damage, contamina­tion (excessive dirt, grease, etc.) and defects. Examine the test
leads for cracked or frayed insulation. If any abnormal conditions
exist do not attempt to make any measurements. For normal
operation when changing ranges through OFF range, please wait
for one second.

Button

When the unit is turned on, the Auto Power-On (APO) mode is
disabled meaning that the meter shuts itself off after about 30
minutes of continuous operation. This feature saves battery life if
the meter is un-attended.

Pressing the
icon appears on the display meaning that the meter will not shut
itself off unless it is turned off by the user. This feature is also
desirable when the meter is used to monitor a parameter for an
extended period of time. Using the DC adapter, it will take over the

battery power to save battery life. Pressing the
will disable the APO mode.

Button (Double Duty)

Pressing this button will toggle between AC and DC current
measurement. In infrared temperature measurement "IR" mode,
pressing this button decreases the Emissivity value of the target.

OPERATION

FUNCTIONS OF BUTTONS

button, enables the APO mode, and an APO

button again

4 13

How to specify the target emissivity

In order to determine an unknown target Emissivity:

1. Set the Function switch to T/C.

2. Plug in a K type surface thermocouple probe to the meter.

3. Measure the target temperature using the surface probe.

4. Unplug the surface probe from the meter.

5. Set the Function switch to IR.

6. Aim at the target. Press & hold the
laser beam for positioning.

7. Adjust the Emissivity button until the meter reads the same
temperature measured via the thermocouple probe. Read the
new Emissivity setting.

button to turn on the

Measurement Considerations

1.Theory of Measurement
Every object emits infrared energy in accordance with its
temperature. By measuring the amount of this radiant energy, it
is possible to determine the temperature of the emitting object.

2.About Infrared
Infrared radiation is a form of light (electromagnetic radiation),
and has the property that it passes easily through air while it is
easily absorbed by solid matter. With an emission thermometer
which operates by detecting infrared radiation accurate mea­surement is possible, irrespective of the air temperature or the
measurement distance.

3.Emission Thermometer Structure
Infrared radiation which has been emitted from the object is
focused upon an infrared radiation sensor, via an optical sys­tem. This includes a lens which is transparent to infrared
radiation, and 5.3µm cut off filter. The output signal from the
infrared radiation sensor is input to an electronic circuit along
with the output signal from a standard temperature sensor
(Thermopile).

4. Emissivity
All objects emit invisible infrared energy. The amount of energy
emitted is proportional to the object's temperature and its ability
to emit IR energy. This ability, called emissivity, is based upon
the material that the object is made of and its surface finish.
Emissivity values range from 0.10 for a very reflective object to

1.00 for a black body. Factory set emissivity value of 0.95, which
cover 90% of typical applications.

5. If the surface to be measured is covered by frost or other
material, clean it to expose the surface.

6.If the surface to be measured is highly reflective, apply masking
tape or matt finish black paint to the surface.

7.If the meter seems to be giving incorrect readings check the front
lens. There may be condensation or debris obstructing the lens;
clean per instructions in the maintenance section.

Substance Thermal Substance Thermal

emissivity emissivity

Asphalt 0.90 to 0.98 Cloth (black) 0.98
Concrete 0.94 Human skin 0.98
Cement 0.96 Lather 0.75 to 0.80
Sand 0.90 Charcoal (powder) 0.96
Earth 0.92 to 0.96 Lacquer 0.80 to 0.95
Water 0.92 to 0.96 Lacquer (matt) 0.97
Ice 0.96 to 0.98 Rubber (black) 0.94
Snow 0.83 Plastic 0.85 to 0.95
Glass 0.90 to 0.95 Timber 0.90
Ceramic 0.90 to 0.94 Paper 0.70 to 0.94
Marble 0.94 chromium oxides 0.81
Plaster 0.80 to 0.90 Copper oxides 0.78
Mortar 0.89 to 0.91 lron oxides 0.78 to 0.82
Brick (red) 0.93 to 0.96 Textiles 0.90

INFRARED ELECTRICAL

Temperature Range: -20°C to 550°C / -4°F to 1022°F
Display Resolution: 1°C / 1°F
Accuracy: 2% of reading or 3°F, whichever is greater, at 72°F

ambient and Emissivity of 0.95 or greater

Temperature Coefficient: ±0.2% of reading or ±0.36°F/0.2°C,

per °F/°C change in ambient temperature whichever is greater,
above 82.4°F/28°C or below 64.4°F/18°C ambient tempera­tures

Response Time: 1.5 seconds
Spectral Response: 6 to 14µm nominal
Emissivity: 0.10 to 1.00 by step of 0.01
Detection Element: Thermopile
Optical Lens: Fresnel Lens
Field of View: 100mmØ at 1000mm (2.5"Ø at 25")

Spot size increases with distance from the probe tip as shown

(Spot Diameter measured at 90 % Energy)

K-type thermocouple ELECTRICAL

Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range:

Thermocouple Range

K-TYPE -200°C to 1372°C, -328°F to1999°F
Auto range: 0.1°C/1°C, 0.1°F/1°F
Accuracy: Accuracy is specified for operating temperatures over
the range of 18°C to 28°C (64°F to 82°F) for 1 year, not including
thermocouple error.

±(0.1%rdg + 1°C) on -60°C to 1372°C

±(0.1%rdg + 2°C) on -60°C to -200°C

±(0.1%rdg + 2°F) on -76°F to 2501°F

±(0.1%rdg + 4°F) on -76°F to -328°F
Temperature Coefficient: ±0.2% of reading or ±0.36°F/0.2°C,

whichever is greater, change in accuracy per °F/°C change in
ambient operating temperature above 82.4°F/28°C or below

64.4°F/18°C.

Input Protection: 24V dc or 24V ac rms maximum input voltage

on any combination of input pins.

Input Connector: Accepts standard miniature thermocouple con-

nectors (flat blades spaced 7.9mm, center to center), SMP type.

Button (Double Duty)

Press button to select the Manual Range mode and turn off

the "AUTO" annunciator.

In the Manual Range mode. Each time you press
the range (and the input range annunciator) increments, and a new
value is displayed. To exit the Manual Range mode and return to

autoranging, press and hold down
"AUTO" annunciator turns back on.

In infrared temperature measurement "IR" mode, pressing this
button increases the Emissivity value of the target.

button for 2 seconds. The

button,

Button

In thermocouple temperature "T/C" mode, pressing this button
scrolls thru T1, T2, and (T1-T2) temperature readings.

Button

Press to enter the MAX MIN AVG Recording mode (manual
range only). The "REC", "APO" annunciator turns on and tenable
the APO mode. Meter do not take records when the display reads
overrange (+/- OL).

Push
average(AVG) and present readings. Press and hold down the

to cycle through the maximum(MAX), minimum(MIN),

for 2 seconds to exit and erase recorded reading.

Button

Pressing the key to enter the Data Hold mode, the "HOLD"
annunciator is displayed. When HOLD mode is selected, the meter
held the present readings and stops all further measurements.

Pressing the key again to cancel HOLD mode causing
meter to resume taking measurements.

Button

Press to enter the Relative mode, zero the display, and
store the displayed reading as a reference value. The relative
mode annunciator "REL" is displayed.

Press again to exit the relative mode.

Button

Pressing this button toggles the temperature display between
Degrees Celsius(°C) or Degrees Fahrenheit(°F).

Button

Press button to toggle on and off of display backlight. The
backlight will switch-off automatically after 30 seconds.

Button

Press & hold to turn on the laser beam. Release the button to
turn off the laser beam. When the laser beam is on, a laser icon
appears on the display.

There is a switch in front of the laser aperture select between
laser Dot or laser Circle.

512

Note: Unplug any thermocouple probes from the

thermocouple input sockets before making any other
types of measurements.

Voltage Measurements

1. Connect the red test lead to the "V " jack and the black test
lead to the "COM" jack of the multimeter.

2. For DC measurement, set the Function switch
" V " position. For AC measurement, set the
Function switch " V " position.

3. Connect the other end of the test leads to the device or circuit
being measured.

Current Measurements

1. Set the Function switch anywhere from 430µA to 10A depending
on the range.

2. In the 10A position, connect test leads to "A" and "COM" jacks.
In lower ranges, connect test leads to "mA µA" & "COM" jacks.

3. For AC measurement, press the
appear on the display.

4. Connect the multimeter in Series with the circuit being measured.

button, and an AC icon will

CONTINUITY

Audible indication: <30Ω
Overload protection: 500VDC or AC rms

DIODE TEST

Accuracy: ±(3.0%rdg + 3dgts)
Resolution: 100µV
Test current: 1.0 ± 0.6mA
Test voltage: <3.5V

LOGIC TEST

Threshold: Logic Hi( ) (2.8 ± 0.8V)

Logic Lo( ) (0.8 ± 0.5V)

Frequency response: 20MHz
Detectable pulse width: 25nS
Pulse limits: >30% & <70% duty
Overload protection: 500VDC or AC rms

CAPACITANCE

Ranges: 4.3nF,43nF,430nF,4.3µF,430µF
Resolution: 0.1pF
Accuracy: ±(5.0%rdg + 10dgts)
Test frequency: 4.3nF,43nF ranges 1KHz

430nF,4.3µF ranges 270Hz
430µF range 27Hz

INDUCTANCE

Ranges: 4.3mH,43mH,430mH,4.3H,43H
Resolution: 1µH
Accuracy: ±(5.0%rdg + 20dgts) on 4.3mH range

±(5.0%rdg + 10dgts) on 43mH to 43H ranges

Test frequency: 4.3mH,43mH ranges 1KHz

430mH,4.3H ranges 270Hz
43H range 27Hz

Test conditions: quality factor > 5 in 270Hz

Resistance & Continuity Measurements

1. Set the Function switch to the resistance position.

2. Remove power from the device or circuit under test.

3. Connect the test lead to the "V " & "COM" jacks.

4. The beeper sounds once, if the resistance being measured is
less than 30 Ohms.

FREQUENCY

Ranges: 100Hz,1000Hz,10KHz,100KHz,500KHz
Resolution: 0.01Hz (under 100Hz)
Accuracy: ±(0.1% rdg + 3dgts)
Sensitivity: 1Vrms min
Overload protection: 500VDC or AC rms

LASER SIGHTING

Laser sighting: 12 point Laser circle
Wavelength(Color): 650-670nm(RED)
Operating distance: 2 to 25 feet
Maximum Optical Power output: <5mW at 75°F ambient

temperature Class IIIa Laser Product

Safety Classification: Class 3A
FDA Classification: Complies with 21 CFR Chapter 1,

Subchapter J

6 11

DC VOLTS

Ranges: 430mV(manual),4.3V,43V,430V,1000V
Resolution: 10µV
Accuracy: ±(0.25%rdg + 1dgt)
Input impedance: >10MΩ
Overload protection: 1000VDC or 750VAC rms
Low Energy circuits: Up to 1000VDC
High Energy circuits: Up to 250VDC

AC VOLTS (50Hz-2KHz)

Ranges: 400mV(manual),4.0V,40V,400V,750V
Resolution: 10µV
Accuracy: ±(% of reading+no. of digits)

Range 50Hz-100Hz 100Hz-500Hz 500Hz-2KHz
400mV ±(2.0%rdg+3dgts) N/A

4.0V N/A
40V
400V
750V

Input impedance: >10MΩ
Overload protection: 1000VDC or 750VAC rms
Low Energy circuits: Up to 750VAC
High Energy circuits: Up to 250VAC

±(0.75%rdg+2dgts)

±(1.5%rdg

+3dgts)

DC CURRENT

Ranges: 430µA,4.3mA,43mA,430mA,10A
Resolution: 10nA
Accuracy:±(0.5%rdg + 1dgt) on 430µA to 430mA ranges

±(2.0%rdg + 1dgt) on 10A range

Burden voltage: 1.4V on all ranges, execpt

1.5V on 10A range

Input protection: 0.5A / 250V fast blow fuse

10A / 600V fast blow ceramic fuse

AC CURRENT (50Hz-1KHz)

Ranges: 400µA,4.0mA,40mA,400mA,10A
Resolution: 10nA
Accuracy:±(1.0%rdg + 2dgts) on 400µA to 400mA ranges

±(2.5%rdg + 2dgts) on 10A range

Burden voltage: 1.4V on all ranges, execpt

1.5V on 10A range

Input protection: 0.5A / 250V fast blow fuse

10A / 600V fast blow ceramic fuse

RESISTANCE

Ranges: 430Ω,4.3KΩ,43KΩ,430KΩ,4300KΩ,43MΩ
Resolution: 10mΩ
Accuracy:±(0.3%rdg + 3dgts) on 430Ω to 4300KΩ ranges

±(1.5%rdg + 4dgts) on 43MΩ range

Audible indication: < 30Ω on 430Ω range
Open circuit volts: 1.2Vdc (3.0Vdc on 430Ω range)
Overload protection: 500VDC or AC rms

Infrared (Non-Contact) Temperature Measurements

1. Set the Function switch to "IR" position.

2. Press the

3. Aim at the target. Press & hold the
beam. There is a switch in front of the laser beam aperture which
projects either Laser Dot or Laser Circle. The laser dot indicates
the center of the optical field of view. The laser circle indicates
the perimeter of the field of view. There is a 0.63 inches offset
between the laser aperture and the center of the optical field of

view. The laser beam only turns on when the
pressed & held Releasing the button turns off the laser beam.

4. The target must be larger than the optical field of view of the
multimeter (Spot Size).

5. Read the temperature.

or buttons to set the Emissivity of the target.

button to turn on the laser

button is

Frequency Measurements

1. Set the Function switch to the "Hz" position.

2. Connect the test leads from the point of measurement to the "V"
& "COM" jacks of the meter.

3. Read the frequency.

Note: Unplug the test leads from the multimeter before

making any type of thermocouple temperature
measurements.

Thermocouple Temperature Measurements

1. Set the Function switch to "T/C" position.

2. The multimeter can accept up to two K type thermocouple
inputs.

3. Plug in the thermocouple probe(s) to the mating built-in
connector(s) in the meter.

4. The temperature is displayed in either Degree Celsius (°C) or
Degree Fahrenheit (°F). To change the temperature Engineering

unit, press the

5. Press the

button.

button to display T1, T2, or T1-T2.

710

Note: Unplug the test leads and thermocouple probes from

the multimeter before making any capacitance or
inductance measurement.

Capacitance Measurements

Do Not apply external voltage to the Cx Lx sockets. Make sure
that the capacitor is fully discharged, otherwise damage to the
meter may result.

1. Set the Function switch to the desired capacitance range (µF to

nF).

2. Insert the capacitor leads into the Cx Lx sockets.

3. Read the capacitance value.

Inductance Measurements

1. Set the Function switch to the desired inductance range (mH to

H).

2. Insert the inductor leads into the Cx Lx sockets.

3. Read the inductance value.

Diode Tests

1. Connect the red test lead to the "V " jack and the black test
lead to the "COM" jack.

2. Set the Function/Range switch to the " " position.

3. Turn off power to the circuit under test.

4. Touch probes to the diode. A forward-voltage drop is about 0.6V
(typical for a silicon diode).

5. Reverse probes. If the diode is good, OL is displayed. If the
diode is shorted, ".000" or another number is displayed.

6. If the diode is open, OL is displayed, in both directions.

7. If the junction is measured in a circuit and a low reading is
obtained with both lead connections, the junction may be
shunted by a resistance of less than 1KΩ. In this case the diode
must be disconnected from the circuit for accurate testing.

Logic Measurements

1. Set the Function/Range switch to the Logic position.

2. Connect the red test lead to the "V " jack and the black test
lead to the "COM" jack.

3. Connect the red test lead to the test point and the black lead to
the common bus of the logic circuit.

4. A " "on the display indicates TTL logic high and a " " indicates
a TTL logic low. Both indicators are on when the point of
measurement is toggling high and low.

SPECIFICATIONS

Display: Backlit liquid crystal display (LCD) with a maximum

digital reading of 43000 counts. Includes an Analog Bar Graph
of 40 counts.

Display Resolution:

Range: 0-4.3 → .0001

0-43 → .001

0-430 → .01

0-4300 → .1

0-43000 → 1

Polarity: Automatic, positive implied, negative polarity indication.
Overrange: "OL" or "-OL" is displayed.
Low battery indication: The " " is displayed when the battery

voltage drops below the operating level.

Measurement rate:

2/sec, nominal; 1/sec, temperature.
20/sec, Analog display.

Operating Environment: 0°C to 40°C at <70% relative humidity.
Storage Temperature: -20°C to 60°C, 0 to 80% R.H. with battery

removed from meter.

Accuracy: Stated accuracy at 23°C ± 5°C, <75% relative humid-

ity.

Safety: According to EN61010-1 protection class II overvoltage

category (CAT II 600V) pollution degree 2.

Auto Power off: 30minutes after rotary switch and push button no

changes. (except MAX/MIN function)

Power: 6 pcs 1.5V (AA size).

DC Adaptor :DC 9Vmin. - 12Vmax. (LOAD 50mA min.) Use a
certified (CE, VDE) current limited adapter.

Battery life: 100 hours typical.

Dimensions: 202mm (H) x 100mm (W) x 50mm (D).
Weight: Approx. 18.5 oz. (525g) including battery.
Accessories: The unit comes with a protective Rubber Boot, a

pair of test leads, 6 AA size Batteries, One Spare fuse, Type K
Beaded wire thermocouple, and the instruction manual.

Tripod Mount: ¼" - 20 UNC.

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