Megger OTS100AF, OTS80AF, OTS60AF Quick Reference Manual

OTS100AF/OTS80AF/OTS60AF

Oil Test Set
Testeur d’huile
Öltestgerät
Equipo de prueba de aceite

Quick reference guide

Guide de référence rapide

Schnellreferenz

Guía de referencia rápida

G SAFETY WARNINGS

Safety warnings and precautions must be read and
understood before the OTS100AF/OTS80AF/OTS60AF is
used. They must be observed during use.

■ The OTS100AF/80AF/60AF must only be used in the

way intended and for the stated purposes described
by Megger.

■ The OTS100AF/80AF/60AF must not be used if any

part of it is damaged.

■ The OTS100AF/80AF/60AF must be properly earthed.

A supplementary earth terminal is provided.

■ Position the OTS100AF/80AF/60AF so that power can

be easily removed.

■ The OTS100AF/80AF/60AF must not be used in wet

locations or with rain falling on the instrument.

■ The OTS100AF/80AF/60AF must only be used for

testing electrical grades of insulating liquids. No
other objects or substances should be placed in the
test chamber.

■ The OTS100AF/80AF/60AF must only be used with

one of Megger’s precision test vessels or VCM100D/
VCM80D correctly fitted on the support horns in the
test chamber.

■ Replacement fuses must be of the correct type and

rating.

■ Calibration or repair must only be carried out by a

Megger qualified repair facility.

■ The test chamber must be kept clean and free from

lint or other fibres.

■ The OTS100AF/80AF/60AF weighs 30 kg. Care

should be taken when lifting the instrument.

■ It is prohibited to insert foreign objects into any gap

on the instrument before or during a test.

■ Unit must be used in a well ventilated location. Small

quantities of Ozone may be created after prolonged
testing.

Symbols used on this instrument

G Caution: refer to accompanying notes
F Danger high voltage, risk of electrical shock

DC voltage

a AC voltage

c Equipment complies with current EU

Directives

u Earth terminal

f

Fuse

USB terminal

Equipment complies with ‘C tick’

requirements

Do not dispose of in the waste stream

Instrument setup

The OTS100AF/OTS80AF/OTS60AF must only be used by
suitably trained persons.

Out of the box

List of items

■ OTS100AF/OTS80AF/OTS60AF Oil test set instrument

■ 400 ml precision vessel assembly

■ Electrode set(s) as ordered & feeler gauge set

■ Impeller stirrer lid assembly if ordered

■ Magnetic bead stirrers (2) and retriever

■ User manual CD

■ Power lead as ordered

Accessories (supplied separately)

■ Vessel assembly 150 ml

■ VCM100D/VCM80D voltage meters

Instrument preparation

■ Place instrument on a solid surface

■ Connect ground terminal to a suitable earth

connector

■ Fit selected electrodes to the threaded shafts in

the test vessel taking care not to scratch electrode
surfaces

■ Adjust the electrode gap with the feeler gauges

provided, then lock the adjustment wheels and
recheck the gap

■ Fit test vessel into instrument chamber

■ Connect line power

■ Turn on the instrument

Instrument controls

The OTS100AF/OTS80AF/OTS60AF is controlled by four
directional keys, ‘OK’ key and ‘TEST’ key and 12 digit
alphanumeric keypad.

Pressing the ‘TEST’ button will initiate a test. Directional
and ‘OK’ keys are used to navigate and select options.

Display

The display is a 3.5” colour TFT display with backlight.
Six tabbed windows are provided to facilitate instrument
setup, test execution and other functions. Users navigate
between top level tabbed windows using left and right
arrows. Up and down arrows are used to highlight items
and ‘OK’ toggles options positioned opposite each item.

Main tab icons

Home (Test) File Tools

Setup Information Language

Initial settings

It is advisable to set the following before initiating a test:

■ Set date and time – time/date option

■ Adjust the display backlight for optimum legibility –

display setup option

■ Select units – metric or imperial

Care of instrument

■ Always keep the instrument clean and free from dust

and fibrous material

■ Cleanliness of the test chamber is very important

■ Cleaning the test vessel is mandatory and a thorough

clean must be done daily/weekly depending on
frequency of testing

■ Introducing fibres or other particles into the test

vessel will result in erroneous breakdown values. A
small volume of a test sample can be used to rinse
out remnants of old oil

■ If there is any damage to the test vessel, chamber or

lid, the instrument should be repaired by a Megger
authorised repair facility