Omega HHM591 User guide

OMEGA

HHM591

Digital Clamp-On Meter

omega. com

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http://www.omega.com

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Toll Free in Benelux: 06 0993344 Toll Free in Germany: 0800 82 66342

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Tel: [phone] FAX: [phone] Manchester, M44 5EX, England

e-mail: [email protected] Tel: [phone] FAX: [phone]

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Toll Free in France: 0800-4-06342

e-mail: [email protected]

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 certification.
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.

For immediate technical or application assistance:

Servicing North America:

SM

SM

Servicing Europe:

TM

Internet e-mail

[email protected]

Tel: (95) 800-TC-OMEGA

FAX: [phone]

SM

SAFETY INFORMATION

The following safety information must be observed to insure maximum

personal safety during the operation at this meter:

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

2. Use caution when working above 60V dc or 30V ac rms. Such voltages pose
a shock hazard.

3. When Using the probes, keep your fingers behind the finger guards on the
probes.

4. Measuring voltage which exceeds the limits of the clampmeter may damage
the meter and expose the operator to a shock hazard. Always recognize the
meter voltage limits as stated on the front of the meter.

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

1

SPECIFICATIONS

Display: 3½ digit liquid crystal display (LCD) with a maximum reading of 1999.
Polarity: Automatic, positive implied, negative polarity indication.
Overrange: (OL) or (-OL) is displayed.
Zero: Automatic.
Low battery indication: The " " is displayed when the battery voltage drops

below the operating level.

Measurement rate: 2.5 times per second, nominal.
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 humidity.
Safety: According to EN61010-1 protection class II overvoltage category

(CAT III 600V) pollution degree 2.

Clamp jaw: According to EN61010-2-032 CAT IV 600V.
Power: Single standard 9-volt battery.
Battery life: 200 hours typical.
Dimensions: 250mm (H) x 100mm (W) x 46mm (D).
Weight: Approx. 380g including battery.
Accessories: One pair test leads, 9V battery.

2

DC VOLTS

Ranges: 600V
Accuracy: ±(0.5%rdg + 1dgt)
Input impedance: 10MW
Overload protection: 600VDC or AC rms

AC VOLTS (50Hz-500Hz)

Ranges: 200V,600V
Accuracy: ±(1.2%rdg + 4dgts)
Input impedance: 10MW
Overload protection: 600VDC or AC rms

RESISTANCE

Ranges: 2KW,200KW
Accuracy: ±(1.2%rdg + 1dgt)
Open circuit volts: 0.3Vdc
Overload protection: 600VDC or AC rms

FREQUENCY (Autoranging)

Ranges: 2KHz,20KHz
Accuracy: ±(0.1%rdg + 3dgts)
Sensitivity: 80Vrms min
Overload protection: 600VDC or AC rms

3

CONTINUITY

Audible indication: less than 30W on 2KW range
Overload protection: 600VDC or AC rms

DIODE TEST

Test current: 1.0mA±0.6mA
Accuracy: ±(6.0%rdg + 3dgts)
Open circuit volts: 3.0Vdc typical
Audible indication: <30mV
Overload protection: 600VDC or AC rms

DC CURRENT (Put conductor at the center of the jaws)

Ranges: 200A,700A
Resolution: 100mA
Accuracy: ±(1.5%rdg + 5dgts)

*700A to 1200A: ±(2.0% rdg + 5dgts)

Overload protection: 1200Adc max. for 1 minute

AC CURRENT (40Hz-500Hz) (Put conductor at the center of the jaws)

Ranges: 200A,700A
Resolution: 100mA
Accuracy: ±(1.75%rdg + 5dgts) on 50Hz-60Hz

±(3.5%rdg + 5dgts) on 40Hz-500Hz
*700A to 1000A(50Hz/60Hz): ±(2.5% rdg + 5dgts)
Overload protection: 1000Aac max. for 1 minute

4

OPERATION

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.

Button:

H

Press " H " button to toggle in and out of DATA Hold mode. In the DATA Hold
mode, the " H " annunciator is displayed. (The DATA Hold mode may be exited
when changing function.).

MAX HOLD Button:

Press "MAX" button to toggle in and out of MAX Hold mode (holding the highest
absolute reading). In the MAX Hold mode, the " MAX " annunciator is
displayed.
The MAX hold function is not available in the frequency count mode.

DCA ZERO Button:

In DC current function, Press (DCA ZERO) button to toggle in and out of the
Relative mode, the "ZERO" annunciator turn on, zero the display, and store the
displayed reading as a reference value.

5

Voltage Measurements

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 desired Voltage type (AC or DC) and

range. If magnitude of voltage is not known, set switch to the highest range

and reduce until a satisfactory reading is obtained.

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

4. For dc, a (-) sign is displayed for negative polarity, positive polarity is implied.

Current Measurements

1. Set the Function/Range switch to the desired highest 700A range (AC or

DC). In DC current measurement use DCA ZERO button, offset the residual

magnetic of the jaws.

2. Press the trigger to open transformer jaws and clamp onto one conductor

only. Read the current directly on the display. It is recommended that the

conductor be placed at the center of the closed jaws for maximum accuracy.

3. When the reading is lower than 200 counts, set the range switch to the next

lower range position. For maximum accuracy, select the lower range

possible without overranging the meter.

6

Resistance Measurements

1. Set the Function/Range switch to the desired resistance range.

2. Remove power from the equipment under test.

3. Connect the red test lead to the " + " jack and the black test lead to the "COM"

jack.

4. Touch the probes to the test points. In ohms, the value indicated in the

display is the measured value of resistance.

WARNING

The accuracy of the functions might be slightly affected, when exposed to

a radiated electromagnetic field environment, eg, radio, telephone or

similar.

Frequency Measurements

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

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

jack.

3. Connect the test leads to the point of measurement and read the frequency

from the display.

7

Continuity Measurements

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

2. Touch the probes to the test points. the beeper sounds continuously, if the

resistance is less than 30W .

Diode Tests

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

jack.

2. Set the Function/Range switch to the "

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

1kW. In this case the diode must be disconnected from the circuit for

accurate testing.

" position.

8

MAINTENANCE

WARNING

Remove test leads before changing battery

or performing any servicing.

Battery Replacement

Power is supplied by a 9 volt "transistor" battery. (NEDA 1604, IEC 6F22). 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 cover. Remove the battery from battery contacts.

Cleaning

Periodically wipe the case with a damp cloth and detergent, do not use
abrasives or solvents.

9

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months
from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1) year product
warranty to cover handling and shipping time. This ensures that OMEGA's customers receive maximum cover age on each product.If
the unit should malfunction, 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 W ARRANTY 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 V OID if the unit shows evidence of ha ving been tampered with or shows evidence
of 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 PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
LIMITATION OF LIABILITY: The remedies of purchaser set forth 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 way,
OMEGA assumes no responsibility as set forth 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.

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY
PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA'S
CUSTOMER SERVICE DEPARTMENT (IN ORDER TO 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 follo wing

information available BEFORE contacting OMEGA:

1. P.O. 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 1999 OMEGA ENGINEERING,
INC. All rights reserved. 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.

WARRANTY / DISCLAIMER

RETURN REQUESTS / INQUIRIES

FOR NON-WARRANTY REPAIRS, consult OMEGA for

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

1. P.O. number to cover the COST of the repair.

2. Model and serial number of product , and

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

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