Micsig SigOFIT MOIP01P SigOFIT MOIP01P User manual

SigOFITTM
Optical-fiber Isolated Probe
USER MANUAL
Version: V2.3
Shenzhen Micsig Technology Co. Ltd

SigOFIT Optical-fiber Isolated Probe User Manual
2 / 25
www.micsig.com
Preface
The information provided in this document is provided "as is" and is subject to change without notice in future
editions. Further, to the fullest extent permissible pursuant to applicable law, Micsig disclaims all warranties,
express or implied, with respect to this manual and any information contained herein, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose. Micsig shall not be liable for errors or
for incidental or consequential damages arising out of the furnishing, use or application of this document or any
information contained herein.
If a separate written agreement has been entered into between Micsig and the User that contains warranty
provisions covering the contents of this document and the warranty provisions conflict with those provisions, the
warranty provisions in the separate agreement shall prevail.
Contact Information
Shenzhen Micsig Technology Co., Ltd.
Tel: [phone]
Email: [e-mail]
Address: 1F, Building A, Huafeng International Robot Industrial Park, Hangcheng Avenue, Baoan District,
Shenzhen, Guangdong, China, 518126

SigOFIT Optical-fiber Isolated Probe User Manual
3 / 25
www.micsig.com
Warranty
Micsig warrants that this product will be free from defects in materials and workmanship for a period of one (1)
year from the date of shipment. If any such product proves defective in materials or workmanship during this
warranty period, Micsig, at its option, either will repair the defective product without charge for parts and labor, or
will provide a replacement in exchange for the defective product. Parts, modules and replacement products used by
Micsig for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and
products become the property of Micsig.
Standard accessories are NOT covered in main body warranty.
The bending radius of the optical isolation probe must not be less than 8cm, otherwise it will lead to fiber
breakage. Damage to the fiber cable is NOT covered by the warranty.
The warranty will be void in the following cases, but repair services are provided free of labor charges and only
parts are charged:
a. Damage to any accessory caused by improper use, maintenance, or storage by the consumer.
b. Damage caused by force majeure factors, such as natural disasters, etc.
Micsig will refuse to provide repair service or provide repair service for a fee in the following cases:
a. Unable to provide product packaging or anti-counterfeit labels on product packaging.
b. The content of the security label is altered, or blurred and unrecognizable.
c. Disassembled by any person not authorized by Micsig. (e.g., changing wires, disassembling internal
components, etc.)
d. No sales voucher or sales voucher content does not match the product.

SigOFIT Optical-fiber Isolated Probe User Manual
4 / 25
www.micsig.com
Catalog
WARRANTY ...............................................................................................................................................................................3
GENERAL SAFETY SUMMARY...........................................................................................................................................5
MAINTENANCE SAFETY SUMMARY ...............................................................................................................................6
COMPLIANCE INFORMATION ...........................................................................................................................................7
ENVIRONMENTAL NOTES .......................................................................................................................................................................... 8
INTRODUCTION.......................................................................................................................................................................9
PROBE DESCRIPTION......................................................................................................................................................... 10
OPTICAL-ELECTRICAL CONVERTER...................................................................................................................................................... 10
ELECTRICAL-OPTICAL CONVERTER...................................................................................................................................................... 11
E-O CONVERTER ATTENUATING TIPS.................................................................................................................................................... 11
PRECAUTION REQUIREMENTS...................................................................................................................................... 13
MEASUREMENT SYSTEM PRECAUTIONS .............................................................................................................................................. 13
ENVIRONMENTAL REQUIREMENTS ........................................................................................................................................................ 14
SAFETY REQUIREMENTS .......................................................................................................................................................................... 14
INSTALLATION ........................................................................................................................................................................................... 16
OPERATION STEPS..................................................................................................................................................................................... 16
AUTO CALIBRATION AND MANUAL ZERO ............................................................................................................................................ 17
TECHNICAL SPECIFICATIONS ....................................................................................................................................... 18
MAINTENANCE SERVICE ................................................................................................................................................. 22
TROUBLESHOOTING.................................................................................................................................................................................. 22
MAINTENANCE .......................................................................................................................................................................................... 22
ORDERING INFORMATION .............................................................................................................................................. 23
MODELS ...................................................................................................................................................................................................... 23
STANDARD ACCESSORIES ....................................................................................................................................................................... 23
AFTER SALES SERVICE / SERVICE SUPPORT........................................................................................................... 25

SigOFIT Optical-fiber Isolated Probe User Manual
5 / 25
www.micsig.com
General Safety Summary
Please read the following safety precautions carefully to avoid personal injury and to prevent damage to this product
or any equipment connected to this product.
To avoid possible hazards, be sure to use this product in accordance with the regulations.
Products are only available to personnel with relevant technical training.
To avoid fire or personal injury
Connect and disconnect the equipment properly.
• Only use the testing wires and accessories that are provided with the product or specified by Micsig.
• Before connecting the probe to the circuit under test, connect the probe output terminal to the oscilloscope.
• When connecting to the powered circuits recommended in this manual, maintain a safe distance from the
power-optical converter and attenuator.
• Disconnect the power to the circuit under test before connecting or disconnecting the probe.
• Before disconnecting the probe from the oscilloscope, first disconnect the probe input terminal from the circuit
under test.
Observe all terminal ratings.
To avoid fire or shock hazard, observe all rating and markings on the product. Consult the product manual for
further ratings information before making connections to the product. Do not apply a potential lowest that exceeds
the maximum rating.
Do not operate without covers.
Do not operate this product with covers or panels removed. Hazardous voltage exposure is possible.
Do not operate with suspected failures.
If you suspect that there is damage to this product, have it inspected by qualified service personnel.
Disable the product if it is damaged. Contact Micsig's designated service personnel to conduct the inspection.
Avoid exposed circuitry. Do not touch exposed connections and components when power is present.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
Clean with a dry cloth only.
Terms in this manual.
The following terms may appear in this manual:
Warning: Indicating conditions or practices that could result in injury or loss of life.
CAUTION: Indicating conditions or practices that could result in damage to this product or other property.

SigOFIT Optical-fiber Isolated Probe User Manual
6 / 25
www.micsig.com
Maintenance Safety Summary
Only qualified maintenance personnel with the relevant qualifications may perform maintenance operations. Please
read the "Maintenance Safety Summary" and "General Safety Summary" before performing any maintenance
operations.
Do not make repairs alone: Do not make internal repairs or adjustments to this product unless there is someone on
site who can provide first aid and resuscitation measures.
Disconnect the power supply: To avoid electric shock, disconnect the power supply of the equipment first, and
then disconnect the power cord from the main power supply.
Caution when servicing with electricity: Dangerous voltages or currents may be present in this product.
Disconnect the power and test leads before removing the protective panel and performing soldering or component
replacement.
To avoid electric shock, do not touch the exposed connectors.

SigOFIT Optical-fiber Isolated Probe User Manual
7 / 25
www.micsig.com
Compliance Information
This section lists the Safety and Environmental standards with which the instrument complies. This product is
intended for use by professionals and trained personnel only; it is not designed for use in households or by children.
Equipment type
Test and measuring equipment.
Pollution level description
A measure of the contaminants that could occur in the environment around and within a product. Typically, the
internal environment inside a product is considered to be the same as the external. Products should be used only in
the environment for which they are rated.
• Pollution Degree 1. No pollution or only dry, nonconductive pollution occurs. Products in this category are
generally encapsulated, hermetically sealed, or located in clean rooms.
• Pollution Degree 2. Normally only dry, nonconductive pollution occurs. Occasionally a temporary conductivity
that is caused by condensation must be expected. This location is a typical office/home environment.
Temporary condensation occurs only when the product is out of service.
• Pollution Degree 3. Conductive pollution, or dry, nonconductive pollution that becomes conductive due to
condensation. These are sheltered locations where neither temperature nor humidity is controlled. The area is
protected from direct sunshine, rain, or direct wind.
• Pollution Degree 4. Pollution that generates persistent conductivity through conductive dust, rain, or snow.
Typical outdoor locations.
Pollution degree rating
Pollution degree 2.
Overvoltage category descriptions
The overvoltage category is classified according to IEC60664 standard and is divided into four classes CAT I, CAT
II, CAT III and CAT IV.
 Category I. Circuits not directly connected to a mains supply.
 Category II. Circuits directly connected to the building wiring at utilization points (socket outlets and similar
points).
 Category III. In the building wiring and distribution system.
 Category IV. At the source of the electrical supply to the building.
Overvoltage category
Overvoltage category II

SigOFIT Optical-fiber Isolated Probe User Manual
8 / 25
www.micsig.com
Environmental Notes
This section provides information about the environmental impact of the product.
Product end-of-life handling
When recycling instruments or components, observe the following guidelines:
Equipment Recycling: Production of this equipment required the extraction and use of natural resources. The
equipment may contain substances that could be harmful to the environment or human health if improperly handled
at the product’s end of life. To avoid release of such substances into the environment and to reduce the use of
natural resources, we encourage you to recycle this product in an appropriate system that will ensure that most of
the materials are reused or recycled appropriately.
This symbol indicates that the product complies with the relevant requirements of the EU
Directives 2012/96/EC and 2006/66/EC on Waste Electrical and Electronic Equipment (WEEE)
and Batteries.

SigOFIT Optical-fiber Isolated Probe User Manual
9 / 25
www.micsig.com
Introduction
The Micsig SigOFITTM optical-fiber isolated probe offers a galvanically isolated measurement solution for
accurately resolving high bandwidth, high voltage differential signals in the presence of large common mode
voltages with the excellent common mode rejection capability within its bandwidth range.
Key Features:
 Exclusive SigOFIT ™ optical isolation technology, common mode voltage up to 85kVpk.
 Differential voltages range 100mV-5000Vpk (attenuating tip dependent)
 CMRR up to 128dB at 100MHz and up to 108dB at 1GHz
 1% accuracy at DC Gain, 1.5% accuracy within effective bandwidth range
 Fast response, calibration in 1 second, delivers accurate signal output in real time
Applications:
 Power device evaluation, current parallel measurement, EMI and ESD troubleshooting
 Motor drive design, power converter design, electronic ballast design
 Design and analysis of GaN, SiC, IGBT half/full bridge devices
 Tests of inverters, UPS and switching power supplies
 Safety isolation test for high voltage, high bandwidth applications
 Wide voltage, wide band test applications
 Floating measurements

SigOFIT Optical-fiber Isolated Probe User Manual
10 / 25
www.micsig.com
Probe description
Optical-Electrical Converter
The Optical-Electrical Converter (O-E Converter hereafter) can restore the optical signal transmitted by the
Electrical-Optical converter (E-O Converter hereafter) to an electrical signal and input to the oscilloscope. The
buttons on the O-E converter are to control the probe and the LEDs indicate the operating status of the probe.
Optical-Electrical Converter (O-E Converter)
Button Description:
Button: Cali. (on MOIP01P, MOIP02P, MOIP03P only)
Short press to start Auto calibration, calibration time is usually less than 1 second, no need to wait. During
calibration, no need to disconnect the test connection. LED will flash during calibration, the buzzer sounds one
time indicates a successful calibration, three times indicates a failed calibration, press Cali. button again if failed.
Button : "△" & "▽" (on MOIP01P, MOIP02P, MOIP03P)
Manually adjust the Zero point (normally no adjustment is required).
Button: Gain (on MOIP05P, MOIP08P, MOIP10P only)
Short press “Gain” to switch between 0dB and 20dB. The attenuation factor of the attenuator is not fixed, the
corresponding attenuation factor needs to be set according to the indicator light.
Over-voltage Alert
When Gain (Power) button flashes rapidly and hearing a rapid "DiDiDiDi..." buzzer sound, it means the input
voltage is out of range, please select a suitable attenuating tip.
Over-heating Warning:
When hearing a “DiDi" sound every 2 seconds, it means the temperature of the Optical-Electrical (O-E)
converter is overheated, please check whether the dissipation port is blocked.
▲Button panel of MOIP01P, MOIP02P, MOIP03P ▲ Button panel of MOIP05P, MOIP08P, MOIP10P