AOIP OM 17 User manual

OM 17
ONSITE MICRO OHMMETER
User Manual
September 2018

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OM 17
Onsite micro ohmmeter
User Manual

LIMIT OF GUARANTEE AND LIMIT OF RESPONSABILITY
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OM 17
LIMIT OF GUARANTEE AND LIMIT OF RESPONSIBILITY
AOIP S.A.S guarantees the absence of faulty materials and the manufacture of this product under normal
conditions of use and maintenance. The guarantee period is one year and takes effect on the date of delivery.
Parts, repairs to the product and service are guaranteed for a period of 90 days. This guarantee only applies
to the original purchaser or the end user if he is a client of a AOIP S.A.S approved distributor and does not
cover fuses, interchangeable batteries/cells nor any product which, in the opinion of AOIP S.A.S, has been
badly handled, modified, neglected or damaged by accident or subjected to abnormal conditions of use or
handling. AOIP S.A.S guarantees that the software will function largely in accordance with its functional
specifications for a period of 90 days and that it has been correctly recorded on nondefective media. AOIP
S.A.S does not guarantee that the software contains no errors or that it will operate without interruption.
AOIP S.A.S approved distributors shall apply this guarantee to products sold to new clients it has not served,
but are not authorised to offer a longer or different guarantee in the name of AOIP S.A.S. Guarantee support
is offered if the product was purchased by an intermediary from an AOIP S.A.S approved point of sale or if the
purchaser has paid the applicable international price. AOIP S.A.S reserves the right to invoice the purchaser
for the costs of importing, repair or replacement parts if the product purchased in one country was sent to
another country for repair.
The obligations under the guarantee of AOIP S.A.S are limited at the discretion of AOIP S.A.S, to
reimbursement of the purchase price, or the free repair/replacement of a defective product returned within the
period of the guarantee to an AOIP S.A.S approved service center.
To claim for service under the guarantee, contact the nearest AOIP S.A.S agent or send the product,
accompanied by a description of the problem, carriage and insurance paid (free on board destination), to the
nearest AOIP S.A.S approved service centre. AOIP S.A.S declines any responsibility in the event of damage
occurring during transportation. After repair under guarantee, the product will be returned to the purchaser,
carriage paid (free on board destination). If AOIP S.A.S considers that the problem was caused by abusive
treatment, modification, an accident or abnormal conditions of operation or handling, AOIP S.A.S will submit a
quotation for the cost of repair and will only commence the repair after receiving authorisation. After repair, the
product will be returned to the purchaser, carriage paid, and the costs of repair and transportation will be
invoiced to him.
THIS GUARANTEE IS EXCLUSIVE AND REPLACES ANY OTHER GUARANTEES, EXPLICIT OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED GUARANTEE AS TO THE SUITABILITY OF THE
PRODUCT TO BE SOLD OR APPLIED TO A PARTICULAR PURPOSE OR USE. AOIP S.A.S SHALL NOT
BE HELD RESPONSIBLE FOR ANY PARTICULAR INDIRECT, ACCIDENTAL OR CONSEQUENTIAL
DAMAGE, NOR ANY CORRUPTED OR LOST DATA, WHETHER AS A RESULT OF AN INFRACTION OF
THE OBLIGATIONS OF THE GUARANTEE, OR ON A CONTRACTUAL, EXTRA-CONTRACTUAL OR
OTHER BASIS.
Because some countries or states do not permit limitations to an implied condition of guarantee, or the
exclusion or limitation of accidental or consequential damage, the limitations and exclusions of this guarantee
may not apply to every purchaser. If any condition of this guarantee is considered invalid or inapplicable by a
competent court, such a decision will in no way affect the validity or binding nature of any other condition.

CONTENT
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CONTENT
A. GENERAL ...................................................................................................................................................................................................................................................................................6
A.1 INTRODUCTION..................................................................................................................................................................................................................................................................................6
A.2 APPLICATIONS...................................................................................................................................................................................................................................................................................6
A.3 MAIN CHARACTERISTICS...................................................................................................................................................................................................................................................................7
A.4 SAFETY PROVISIONS..........................................................................................................................................................................................................................................................................7
Compliance with Safety Standards .............................................................................................................................................................................................................................................7A.4.1 Following Instructions supplied with the accompanying Documents ..........................................................................................................................................................................................7A.4.2 Taking Measurements ................................................................................................................................................................................................................................................................7A.4.3 Instructions to be followed before Use........................................................................................................................................................................................................................................7A.4.4 Faults and abnormal Constraints...............................................................................................................................................................................................................................................8A.4.5 Table of Symbols used................................................................................................................................................................................................................................................................8A.4.6 Maintenance ..............................................................................................................................................................................................................................................................................8A.4.7
B. DESCRIPTION............................................................................................................................................................................................................................................................................9
B.1 General View..........................................................................................................................................................................................................................................................9
B.2 DISPLAY ..........................................................................................................................................................................................................................................................................................10
B.3 ACCESSORIES ..................................................................................................................................................................................................................................................................................11
Delivered with the Unit............................................................................................................................................................................................................................................................11B.3.1 Options delivered to order .......................................................................................................................................................................................................................................................11B.3.2
C. OPERATION.............................................................................................................................................................................................................................................................................12
C.1 REMINDERS OF THE 4-WIRE PRINCIPLE............................................................................................................................................................................................................................................12
C.2 PERFORMING A MEASUREMENT ......................................................................................................................................................................................................................................................12
Switching On .........................................................................................................................................................................................................................................................................14C.2.1 Selecting the Range ...............................................................................................................................................................................................................................................................14C.2.2 Selecting the Measurement Mode.............................................................................................................................................................................................................................................14C.2.3 Ambient temperature compensation ......................................................................................................................................................................................................................................18C.2.4 Setting Alarms .......................................................................................................................................................................................................................................................................19C.2.5 Connecting to Connectors........................................................................................................................................................................................................................................................19C.2.6 Standby (STBY) Position ........................................................................................................................................................................................................................................................20C.2.7
C.3 LIST OF ERROR MESSAGES ..............................................................................................................................................................................................................................................................21
C.4 CONFIGURING THE UNIT ...............................................................................................................................................................................................................................................................22
Principle..................................................................................................................................................................................................................................................................................22C.4.1 Direct Access Key....................................................................................................................................................................................................................................................................22C.4.2 Entering a Number ..................................................................................................................................................................................................................................................................22C.4.3 Programming Menu Table.......................................................................................................................................................................................................................................................23C.4.4 Managing an Alarm Threshold: ALAr......................................................................................................................................................................................................................................24C.4.5 Using the DB9 Connector: rS ..................................................................................................................................................................................................................................................24C.4.6 Managing and printing Memory Content: mEm.......................................................................................................................................................................................................................24C.4.7 Programming the temperature compensated measurement Value.......................................................................................................................................................................................28A.1.1
CONFIGURATION AND OPERATION COMMANDS USING THE RS232 SERIAL LINK..................................................................................................................................................29
C.5 INTRODUCTION................................................................................................................................................................................................................................................................................29
Command Errors...............................................................................................................................................................................................................................................................30A.1.2
C.6 LIST OF COMMANDS ........................................................................................................................................................................................................................................................................31
C.7 GENERAL COMMANDS.....................................................................................................................................................................................................................................................................32
C.8 PROGRAMMING COMMANDS ...........................................................................................................................................................................................................................................................33
C.9 MEMORY USAGE COMMANDS .........................................................................................................................................................................................................................................................36
C.10 OTHER INFORMATION COMMANDS................................................................................................................................................................................................................................................38
C.11 LOGOM PROGRAM .......................................................................................................................................................................................................................................................................38
Installation ........................................................................................................................................................................................................................................................................38A.1.3 Use....................................................................................................................................................................................................................................................................................38A.1.4
D. MAINTENANCE.......................................................................................................................................................................................................................................................................40
D.1 OPENING/CLOSING THE UNIT ..........................................................................................................................................................................................................................................................40
D.2 BATTERY PACK...............................................................................................................................................................................................................................................................................42
Charging.................................................................................................................................................................................................................................................................................42D.2.1 Replacing the Battery ..............................................................................................................................................................................................................................................................42D.2.2
D.3 FUSES ..............................................................................................................................................................................................................................................................................................42
D.4 CHECKING PERFORMANCE ..............................................................................................................................................................................................................................................................43
D.5 MANAGING MAINTENANCE.............................................................................................................................................................................................................................................................43
D.6 UPDATING THE ON-BOARD SOFTWARE ...........................................................................................................................................................................................................................................44
D.7 ADJUSTMENT...................................................................................................................................................................................................................................................................................45
Environment............................................................................................................................................................................................................................................................................45D.7.1 Adjusting the Unit....................................................................................................................................................................................................................................................................45D.7.2
D.8 WARRANTY.....................................................................................................................................................................................................................................................................................46
E. SPECIFICATIONS....................................................................................................................................................................................................................................................................47
E.1 APPLICABLE STANDARDS ................................................................................................................................................................................................................................................................47
Safety Class .............................................................................................................................................................................................................................................................................47E.1.1 EMC Conformity......................................................................................................................................................................................................................................................................47E.1.2 Ambient Conditions..................................................................................................................................................................................................................................................................47E.1.3 Mechanical Conditions ............................................................................................................................................................................................................................................................47E.1.4 Measurement under Reference Conditions ...............................................................................................................................................................................................................................47E.1.5
E.2 CHARACTERISTICS...........................................................................................................................................................................................................................................................................48
General....................................................................................................................................................................................................................................................................................48E.2.1 Resistance measuring function.................................................................................................................................................................................................................................................48E.2.2 Protections...............................................................................................................................................................................................................................................................................48E.2.3
E.3 END OF UNIT SERVICE LIFE .............................................................................................................................................................................................................................................................49
Waste Generated by the Unit....................................................................................................................................................................................................................................................49E.3.1 Unit Destruction Procedure .....................................................................................................................................................................................................................................................49E.3.2
F. ANNEXES..................................................................................................................................................................................................................................................................................50
F.1 UNIT MAINTENANCE PROGRAMMING DIAGRAM..............................................................................................................................................................................................................................51
F.2 DIAGRAMME DE PROGRAMMATION ET DE LECTURE DE L'APPAREIL.................................................................................................................................................................................................52

PRESENTATION
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A. GENERAL
We are very grateful to you for choosing this AOIP S.A.S accuracy measuring instrument which benefits from
our hundred years experience in the manufacture of high quality, accuracy measuring instruments.
Because of this, we are able to continue our policy of continuous innovation which has served our customers
so well for the last 100 years. AOIP S.A.S encourages your comments and would willingly accept
any suggestions from you to help us to perfect our know-how and improve our future products .
A.1 Introduction
The OM 17 microhmmeter is used to perform 4-wire low resistance measurements from 0.1 µΩ (resolution) to
2,500 Ω over seven ranges.
Made in a sturdy and heavy-duty housing, autonomous in operation, it is well suited for on-site measurements.
A.2 Applications
Its main applications are listed below:
Metallic coating measurement, especially in aeronautics.
Ground continuity measurement.
Resistance measurement over motors and transformers.
Contact resistance measurement.
Component measurement.
Electric cable resistance measurement.
Mechanical bond tests.

SAFETY A
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A.3 Main Characteristics
•Programming and operating the unit using a 14-key keypad: selection of range, measurement mode
(low inductive or inductive resistance), temperature compensation and measurement triggering.
•Measurement memory function.
•Programmable alarms that are triggered when thresholds are exceeded.
•Portable unit with battery pack comprising five Ni-MH accumulators, 8.5 Ah (D cell size).
Battery pack recharge: A charger built into the OM 17 recharges the batteries by connecting the unit to the line
(90 V/264 V, 45 Hz/420 Hz), using a standard cord.
Recharge time: 5 hours.
Endurance: 5,000 measurements using a 10 A current level in low inductive mode.
•4-wire measurement with automatic compensation of spurious voltages.
•Automatic compensation of ambient temperature by measuring it using an external sensor or by
manual entry and programming of the metal type or its temperature coefficient.
•LCD display.
•Direct display of the measurement together with its unit, range, measurement mode and if required,
temperature compensation.
Measurement can be triggered from the keypad, remotely, or in automatic mode.
•Sealed, sturdy casing.
•Dimensions: 270 mm x 250 mm x 180 mm.
•Weight: approximately 4 kg
A.4 Safety Provisions
Compliance with Safety StandardsA.4.1
The unit has been constructed and tested in accordance with safety rules relating to electronic measuring
instruments.
This instruction manual contains information and cautionary advice that users must follow to: protect
themselves against electrical shocks, ensure the reliability of the unit, and make sure that the unit is not used
in a way that could damage it or make it unsafe for use.
Following Instructions supplied with the accompanying DocumentsA.4.2
The unit is constructed to operate in complete safety as long as the instructions supplied with the
accompanying documents are followed. Any usage, except those described, may impair operator safety and is
therefore dangerous and prohibited..
Taking MeasurementsA.4.3
The test leads and measuring wires must be in good condition and should be changed if there is any evidence
of deterioration (insulation split, burnt, etc.).
Never exceed the safety values indicated in the specifications.
Never connect the unit to a live circuit.
When the unit is measuring resistance showing a high inductive component (transformers, motors, etc.) after
ending the measurement (with the measurement current cut-off), the unit then discharges this inductance
and displays the icon for this entire duration.
Never disconnect the connection wires before this icon disappears.
Instructions to be followed before UseA.4.4
a) Charging batteries
During battery charge, instrument must be placed on a flat surface with cover opened, in order to connect
instrument to the main power supply. (The cable plug and the main are creating a disconnecting device ) .
During battery charge, any other cable must be disconnected and removed from the instrument
Power cable must remain the one supplied with the instrument (H03VVH2-F2).

GÉNÉRALITÉS
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The OM 17 unit has been mechanically and electrically tested prior to shipping. It has been handled with all of
the necessary care to ensure that it reaches the user undamaged.
It is, however, good practice to perform a quick check in order to detect any deterioration that may have taken
place in transit. If any deterioration is found, declare any reservations to the carrier immediately.
b) Return Shipping
If return shipping is required, the unit should preferably be sent back in its original packaging, with a note
attached to it stating as clearly as possible the reason for its return.
Faults and abnormal ConstraintsA.4.5
Should there be any indication that the protection of the unit has been compromised, it should be switched off
and steps taken to prevent it being used inadvertently.
Protections may have been compromised in the following cases, for example:
The unit is obviously damaged.
The unit is no longer capable of taking accurate measurements.
The unit has been stored under unfavourable conditions.
The unit has been subjected to severe stresses during transport.
Table of Symbols usedA.4.6
Symbol
Description
Double insulation.
Warning: see the accompanying
documents.
Measurement earth terminal.
MaintenanceA.4.7
The fuse replacement of the instrument, the fuse located on the battery replacement and adjusting the
instrument procedure are described in chapter E
The unit should be reassembled as explained in the instruction manual. If the unit is incorrectly or incompletely
reassembled, the operator’s safety may be compromised.
The responsible body must check on a regular basis that none of the components ensuring safety has
deteriorated, and undertake all the necessary steps for preventive operations.
Before the casing is opened, make sure that the measuring leads have been disconnected from the unit and
that the mains cord is also disconnected.
The unit should not be opened up for adjustment, maintenance or repair unless this is absolutely essential, in
which case this work should be carried out only by qualified personnel advised of the risk entailed

SAFETY A
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B. DESCRIPTION
B.1 General View
11 12 13
1
2
3
10 4
5
6
7
9
8 15 14 16
KEY
FUNCTION
1
Programming menu
2
Range selection
3
Measurement and automatic triggering modes
4
Temperature compensation
5
Alarms
6
Memories
7
Start or stop measurement
8
On/Off
9
Lighting
10
Measurement connectors
11
Power connector for recharging the battery pack
12
Pt100 connector
13
RS232 connector/"trigger" connector
14
Cursor keys
15
READY LED
16
AL1 and AL2 LEDs

DESCRIPTION
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B.2 Display
Liquid Crystal Display (LCD), with icons and two number fields.
Two number fields. One with 4 digits and one with 5 digits and their units. The ambient temperature level is
displayed on the top line in "temperature compensation" mode.
The bottom line is used to display the measured values.
Errors are indicated by the appropriate messages.
1 2 3 4 5
13 6
14
12 7
11
10 9 8
REPERE
FONCTION
1
Buzzer on
2
Battery condition
3
Temperature compensation function on
4
Metal selection for measurement compensation mode
5
PC or printer communication in service
6
Memory usage level
7
Measurement units
8
Unit status: "Standby" or "Operate"
9
Measurement modes
10
Measurement range and current level
11
Danger do not disconnect the measurement wires
12
Not used
13
Alarms switched on and activation direction selected
14
REMOTE PRINT
MEM
MR Unit is PC controlled
Print memories
Store measurements in memory
Read memories