Aemc instruments 1026 User Manual

Digital/Analog
Megohmmeter
Model 1026

USER MANUAL

Limited Warranty

The Megohmmeter Model 1026, is warranted to the owner for a period of
2 years from the date of original purchase against defects in manufacture.
This limited warranty is given by AEMC
from whom it was purchased. This warranty is void if the unit has been
tampered with, abused or if the defect is related to service not performed
by AEMC

®

Instruments.

Full warranty coverage and product registration is available on our
website at www.aemc.com/warranty.html

Please print the online Warranty Coverage Information for your
records.

What AEMC

®

Instruments will do:

If a malfunction occurs within the warranty period, you may return the
instrument to us for repair, provided we have your warranty registration
information on file or a proof of purchase. AEMC
option, repair or replace the faulty material.

What You Must Do: First request a return authorization form by phone or
by fax from AEMC

®

Instruments, then return the instrument along with the

signed authorization repair form. Return material, postage pre-paid to:
Chauvin Arnoux®, Inc.,

d.b.a. AEMC® Instruments
Service Department
15 Faraday Drive
Dover, NH 03820 USA
Tel: [phone] (X520)
[phone] (X520)
Fax: [phone]

Caution: To protect against in-transit loss, we recommend you insure
your returned material.

NOTE: You must obtain a CSA# before returning any instrument.

®

Instruments, not by the distributor

.

®

Instruments will, at its

Table of Contents

Warning...............................................................................................3

International Electrical Symbols ..........................................................4

Receiving Your Shipment....................................................................4

Packaging ...........................................................................................4

Description ..........................................................................................4

Specifications ......................................................................................5

General ........................................................................................5

Electrical ......................................................................................6

Safety...........................................................................................6

Ordering Infor mat ion ....................................................................7

Display Features .................................................................................7

Model 1026 Features ..........................................................................8

Functions ............................................................................................9

AC Function ................................................................................9

V
V

DC Function ................................................................................9

Low Ohm and Continuity Function ...............................................9

Megohm Insulation Resistance Test Function ........................... 10

Manual Mode ...................................................................... 10

Lock Mode .......................................................................... 10

Auto Power Off .......................................................................... 11

Maintenance ..................................................................................... 11

Warning ..................................................................................... 11

Battery Replacement ................................................................. 11

Fuse Replacement ..................................................................... 11

Cleaning ..................................................................................... 11

Repair and Calibration ...................................................................... 12

Technical and Sales Assistance ....................................................... 12

Digital Megohmmeter Model 1026

Warning

These safety warnings are provided to ensure the safety of
personnel and proper operation of the instrument.

• Read the following safety information carefully before attempting
to operate or service the meter.

• Safety is the responsibility of the operator!

• Tests are to be carried out only on dead circuits! Check for live

circuits before making resistance measurements.

• The megohmmeter is a source of high voltage, as is the sample
connected to them. All persons performing or assisting in the
tests must employ all safety precautions to prevent electrical
shock to themselves and to others.

• Use personal protective equipment where appropriate.

• When testing capacitive samples, make sure that they have

been properly discharged and that they are safe to touch.

• Electrical equipment and cables may have sufficient capacitance
to store a dangerous charge from the instrument test current.
For proper discharge to occur the push-to-measure b utton must
be in the OFF position with the lock OFF and with the sample
connected between the EARTH (+) and LINE (-) terminals.

• On prolonged tests, the TEST button may be locked ON. Care
should be taken in this mode that no damage is done if the
instrument is left unattended.

• Megohmmeters should never be used in an explosive
environment.

- 3 -

Digital Megohmmeter Model 1026

This symbol signifies that the probes are protected by double or
reinforced insulation. Use only specified replacement parts when

This symbol signifies CAUTION! and requests that the user refer

Risk of electric shock. The voltage at the parts marked with this

International Electrical Symbols

servicing the instrument.

to the user manual before using the instrument.

symbol may be dangerous.

Receiving Your Shipment

Upon receiving your shipment, make sure that the contents are consistent
with the packing list. Notify your distributor of any missing items. If the
equipment appears to be damaged, file a claim immediately with the
carrier and notify your distributor at once, giving a detailed description of
any damage.

Packaging

Your Megohmmeter, Model 1026, consists of the following items:

• Megohmmeter Model 1026

• Set of 8 AA batteries

• Set of leads with black and red alligator clips

• Soft carrying case

• User manual

Description

The AEMC® Model 1026 (Cat. #2117.72) is a portable multi-range
megohmmeter capable of measuring insulation resistance from 1kΩ to
4000MΩ. It has 3 test voltages of 250, 500 and 1000V.

In addition, the Model 1026 has an ohmmeter range to measure from 0.1Ω
to 4000Ω with an audible tone for continuity measurement under 40Ω. A
voltmeter (safety check) with a range from 0 to 600V AC or DC is available
when turned on.

4

Digital Megohmmeter Model 1026

General Specifications:

Display:

3" x 1.7" (76 x 42mm)
Big LCD panel with 40 segments analog bar indication.

Over Range Indication:

“

- O L - ” will be shown on the LCD Panel when out of range measurement

is made.

Low Battery Indication:

The will be shown when the batteries needs to be changed.

Sampling Rate:

2.5 times/sec digital display; 10 times/sec bar graph

Power Source:

(8) 1.5V AA size batteries

Battery Life:

1000V range @ 1 MΩ >10H
500V range @ 1 MΩ >20H
250V range @ 1 MΩ >30H

Operating Temperature and Humidity:

0° to 40°C (32° to 104°F), below 80% RH

Storage Temperature:

-10° to 60°C (14° to 140°F)

Dimension:

7.72" (L) × 4.41" (W) × 2.52" (H)
196mm (L) × 112mm (W) × 64mm (H)

Weight:

Approx. 700g (1.5 lbs) with batteries

- 5 -

Digital Megohmmeter Model 1026

Range

Resolution

Accuracy

600V

0.1V

± (1.5% rdg + 5 dgts)

Range

Resolution

Accuracy

600V

0.1V

± (1% rdg + 3 dgts)

Ω

Range

Resolution

Accuracy

400Ω

0.1Ω

4000Ω

1Ω

Range

Active

Protection

≤ 40Ω

600Vrms

Range

Resolution

Accuracy

4/40/400/4000MΩ (250V)

± (3%rdg + 5dgts

2000MΩ to 4000MΩ)

4/40/400/4000MΩ (500V)

Electrical Specificat ions:

AC Voltage

DC Voltage

Ohms (Autoranging)

Continuity beeper

MΩ (Autoranging)

± (1% rdg + 5 dgts)

4/40/400/4000MΩ (1000V)

Voltage Output: -10% to +20% of selected range
Short Circuit Current: 250/500/100V: 2mA max

Safety Specifications:

• IEC 1010, CAT III, 600V, Pollution Degree 2

• Altitude up to 2000 meters (6000 ft)

• Indoor use only

• EN50081-1; EN50082-1

1kΩ

< 2000MΩ)

± (5%rdg + 5dgts

6

Digital Megohmmeter Model 1026

LOCK

HOLD

Ordering Information:

Megohmmeter Model 1026 ............................................ Cat. #2117.72

Accessories:

Replacement Test Leads with alli gat or cl ips .................. Cat.# 2152.01

Soft Carrying Case. ........................................................ Cat.# 2117.73

Set of 5 fuses 0.5A 600V (fast blow) 1/2 x 3/8 ............... Cat.# 2117.74

Display Features:

Low Battery
High Voltage Output Lock Enable
Data Hold
Continuity Beeper Enable
Analog Bargraph
AC Input
DC Input
Polarity Indication

Dangerous Voltage

- 7 -

Digital Megohmmeter Model 1026

Model 1026 Features:

1. LCD Display 5. Data Hold Button

2. TEST But ton 6. Hi Input Terminal

3. Function Selector 7. Lo Input Terminal

4. Power Lock Button 8. Battery Compartment Cover

8

Digital Megohmmeter Model 1026

Functions

ACV Function:

Turn the function selector to the voltage range. Connect the black test lead
to (–) terminal and the red one to the (+) terminal. Connect the test lead to
the circuit in test. Reading can be held by pressing the HOLD key.

DCV Function:

Turn the function selector to the voltage range. Connect the black test lead
to (–) terminal and the red one to the (+) terminal. Press the TEST button
to change the mode from V
circuit in test. Reading can be held by pressing the HOLD key.

Low Ohm Function and Continuity Functi on :

Turn the function selector to the 4000Ω range. Connect the black test lead
to (–) terminal and the red one to the (+) terminal. Connect the test lead to
the circuit in test. If the reading is less than 40Ω, the continuity beeper will
sound.

Because the test current provided by the meter could reach 200mA, do not
use this range to test electronic components like diodes, transistors or
fuses.

MegOhm Insulation Resistance Test Function:

AC to VDC function. Connect the test lead to the

Warning:

Do not test insulation on a live sample and make sure it is fully
discharged before each test. The Model 1026 is equipped with

AC/DC function which may be used to check if the sample is live.

V

Turn the function selector to desired test voltage range. The LCD displays
“----” to indicate the megohmmeter is standing by.

- 9 -

Digital Megohmmeter Model 1026

Connect the black test lead to the (–) terminal and the red one to the (+)
terminal. Typically, the (+) is connected to ground side of sample, if
available, and if testing to reference to ground. Connect the test lead to
sample. Measuring can be performed in manual power mode or power
lock mode:

• Manual Mode: Press and hold the TEST button to activate the test
voltage source until you obtain a stable reading. A periodic beeping will
warn that there is high voltage output. Release the TEST button to stop
test voltage output. A series of short beeps indicate that discharging is
in progress. When the beeper stops, the discharge is completed. The
test result will automatically be held on the display. Press the Hold key
before making another test.

• Lock Mode: Press the LOCK button to enter the Power Lock operation
mode. Press the TEST button once to activate the test voltage source.
A periodic beeping will warn that there is high voltage output. The test
voltage will continue to be applied until the TEST button is pressed
again. Press the TEST button again to stop the test voltage output. A
series of short beeps indicates that discharging is in progress. When
the beeper stops, the discharge is completed. The test result will be
held on the display automatically. If the test period extends longer than
3-minutes the test source will shut down automatically.

• OVERLOAD: When the measurement exceeds the range of the
instrument “

- O L - ” is displayed.

Warning: Do not activate the test before the leads are properly

connected to the sample under test.
Do not remove the test leads from the sample under test before the

discharge process is completed.

Auto Power Off

When the tester is idle for thirty minutes with no function selector or button
operation, it will turn itself off automatically. To turn the tester on again,
turn the function selector to the “OFF” position, then to the selected
function.

10

Digital Megohmmeter Model 1026

Maintenance

Warning:

• For maintenance only use original factory replacement parts.

• To avoid electrical shock, do not attempt to perform any servicing

unless you are qualified to do so.

• Do not perform any service while the megohmmeter is connected to
any circuit.

• To avoid electrical shock and/or damage to the megohmmeter, do not
let water or other foreign agents into the case.

Battery Changing

When appears on the LCD, the batteries will need to be replaced. To
replace the batteries, turn the function selector to the OFF position,
disconnect the megohmmeter from any circuit, then open the battery
compartment cover with a screwdriver. Eight AA 1.5V batteries are
needed. After replacing the batteries, put the cover back on and tighten
the screw.

Fuse Changing:

When connecting the meter under the Ω range to a source > 10V, the
protection fuse will blow the circuit and a new one will be needed. To
replace the fuse, turn the function selector to the OFF position, disconnect
the megohmmeter from any circuit, dis connect t he test lea ds, remove the
back cover and replace the fuse (F 0.5A 600V).

Cleaning

The megohmmeter may be gently cleaned with a soft damp cloth, with
soap. Dry immediately after cleaning. Do not submerge the case in water.
Make sure the megohmmeter and all leads are perfectly dry before any
further use.

- 11 -

Digital Megohmmeter Model 1026

Repair and Calibration

To guarantee that your instrument complies with the factory specifications,
we recommend that the megohmmeter be submitted to our factory service
center at one-year intervals for recalibration, or as required by other
standards.

For instrument repair and calibration:
Call [phone] • [phone], (X520) • Fax: [phone]

®

Chauvin Arnoux
d.b.a. AEMC

, Inc.

®

Instruments
Service Department
15 Faraday Drive
Dover NH 03820 USA

(Or contact your authorized distributor.) Costs for repair, standard
calibration, and calibration traceable to N.I.S.T. are available.

Note: All customers must call for an authorization number before
returning any instrument.

Technical and Sales Assistance

If you are experiencing any technical problems, or require any assistance
with the proper use or application of this instrument, please call our
technical hotline:

Chauvin Arnoux
d.b.a. AEMC
Phone: [phone]
[phone]
Fax: [phone]
www.aemc.com

®

, Inc.

®

Instruments

12

Chauvin Arnoux®, Inc. d.b.a AEMC® Instruments

15 Faraday Drive • Dover, NH 03820, USA

99-MAN 100220 v10 – 10/17

www.aemc.com