ESS MLS-1R User manual

MLS-1R
LED Light Source for Rigid Endoscopes
PERATI NS MANUAL
Rev. R3-042021

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PREFACE
Thank you for purchasing the ESS MLS-1R LED Light Source which utilizes solid-state illumination
technology. The MLS-1R is intended for applications that require a handheld light source which features high
output, efficient, compact, and lightweight illumination. The MLS-1R utilize eco-friendly LED lighting
technology, exhibits instant-on and electronic intensity dimming capability with long operating lifetime. The
MLS-1R is equipped with an ACMI threaded nut (collar) that fits the bare posts of virtually all rigid
endoscope light guide posts and similar endoscope light posts.
Please read this operating manual in its entirety before using the product.
1. Introduction....................................................................................................3
System Symbol Descriptions............................................................................3
Warning and Precautions.................................................................................3
2. MLS-1R Specifications & Accessories........................................................ 4
Body Diagram and Descriptions.......................................................................4
Specifications....................................................................................................5
3. MLS-1R peration, Batteries and Charger..................................................6
Operation..........................................................................................................6
Batteries and Charger.......................................................................................7
Quick Reference...............................................................................................9
Important Safety Instructions..........................................................................10
Slot / Mode......................................................................................................11
LCD Reference...............................................................................................12
4. Care & Maintenance....................................................................................13
Cleaning......................................................................................................... 13
Drying.............................................................................................................13
5. Troubleshooting...........................................................................................14
6. Limited Warranty..........................................................................................14
7. Regulatory....................................................................................................15
8. Vendor Information......................................................................................15
TABLE F C NTENTS
Page

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1.Introduction
System Symbol Descriptions
Caution Hazard Warning
Caution: Hot Surface Bright Light
Manufacturer Important Information
Do not dispose of this product as unsorted municipal waste. Prepare this product for reuse or
separate collection as specified by Directive 2002/96/EC of the European Parliament and the
Council of the European Union on Waste Electronic and Electrical Equipment (WEEE). If this
product is contaminated, this directive does not apply.
Warnings & Precautions
Please be sure to handle MLS-1R with care at all times. The electrical and optical components
may be damaged by physical trauma, extreme temperatures, or fluid invasion.
This manual describes the proper procedures for using the MLS-1R. This also contains
pertinent information on the proper care and handling during use and storage.
Please read this entire manual carefully before using the MLS-1R. If you have any questions
concerning the material contained in this manual or the operation or safety of the equipment,
please contact ESS Service Department at 1 [phone] x214 or [e-mail].
Check all items upon receipt to assure damage has not occurred during shipment. Verify
compatibility of all components and accessories used with the MLS-1R.
Since the MLS-1R uses proprietary components, there are no user serviceable or
replaceable parts inside the unit. DO OT DISASSEMBLE (will void warranty)!
Avoid storing or using the MLS-1R in areas of heavy traffic where it may sustain physical
damage.
Unit MAY get hot. Provide adequate ventilation to prevent overheating.
DO OT IMMERSE or store liquids above or on the MLS-1R.
Any changes or modifications made to the MLS-1R that are not expressly approved by
ESS, Inc. will void the warranty.
The high intensity light at the front of the MLS-1R and at the tip of the endoscope will create
bright light. To minimize risk of injury, avoid direct viewing or contact.
This equipment is not suitable for use in the presence of flammable mixtures.

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2. MLS-1R Description, Specifications & Accessories
MLS-1R Body Diagram and Descriptions
Power
Button
Light Intensity
Controls
Battery Hatch Door Battery Polarity/Direction Indicators
Figure 1: MLS-1R Body Diagram; Thread Nut
Light Guide Thread Nut

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Light Intensity Buttons:
Possibly hazardous optical radiation emitted from this product. Do not stare at operating
lamp. May be harmful to the eye(s).
Light Guide Thread ut:The light guide thread nut is designed to thread to the ACMI style threading
common on virtually all rigid-style light guide posts. Align the light post evenly into the hole of the thread
nut, and gently rotate clockwise (counter-clockwise when viewed directly above the MLS-1R) until it stops.
Power Button:The RED power button toggles the ON/OFF of the MLS-1R. Press and release the button to
turn on, and again to turn off (do NOT “hold” the button.)
Pressing button next to this symbol decreases the intensity of the
light.
Pressing button next to this symbol increases the intensity of the
light.
Battery Hatch Door:The battery hatch seals the battery and electronics within the body of the MLS-1R.
SPECIFICATI NS
Dimensions
Length: 24MM (0.95”)
Width: 46MM (1.8”)
Height: 77MM (3.0”)
Weight: 130.4g (4.6 oz.)
Illumination System
Type: Light Emitting Diode (LED)
Color Temperature: 5700
LED Power: 3 Watts
Power System
Power Source: Battery Powered (2 x RCR123A)
Battery Type: (2) Lithium Ion RCR123A 3.0V, 900mAh minimum
Battery Life at Full LED Power: 60 minutes
Battery Charge Time: 4 hours
Battery Recharge Cycles: 500 charge cycles
Environment
Operating Ambient Temperature Range: 10 ºC to 40ºC (50°F to 104°F)
Storage Temperature Range: -15 ºC to 55ºC (-5°F to 131°F)
Humidity: 0 – 95% RH
Mode of Operation: Continuous

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3. MLS-1R peration, Batteries and Charger
The MLS-1R’s internal LED operates on two (2) rechargeable Lithium-Ion (RCR123A) batteries and provides
approximately 60 minutes of continuous operation when used with new or fully charged batteries.
Battery Installation
MLS-1R peration
1. At the bottom of the MLS-1R’s battery hatch door, rotate the locking knob counterclockwise until the
line on the knob is pointing 90° from the indentation mark on the hatch. Remove the hatch (refer to
figure 2).
2. Insert the batteries into the unit using the Battery Polarity/Direction Indicators as a guide. The
negative terminal of each battery should be in contact with the spring on each circuit board (refer to
figure 3). Attach the hatch door then rotate the locking knob clockwise until the line on the knob is
pointing toward the indentation mark.
Note: For added afety, the battery hatch door may only be in erted into the MLS-1R body in one
direction. If the door doe not ea ily lide into the ca e, rotate the hatch door 180°. Thi en ure the
battery polarity cannot be rever ed.
3. To remove batteries, rotate the battery hatch door knob counterclockwise a quarter turn until it stops,
remove the door and allow the batteries to slide out.
Figure 2 - Bottom view Figure 3 - MLS-1R attery installation
Installing MLS-1R to User’s Endoscope
1. The MLS-1Ris designed to thread to the standard ACMI threading of the light guide post of virtually all rigid endoscopes and similar
endoscopes. Make sure all adapters are removed so that only the bare post is exposed (see Figure 4a).
2. Hold your endoscope firmly in one hand and slide the MLS-1R onto the light guide post. Make sure the
threads align evenly atop the Thread Nut (Page 4, Figure 1). If the threads do not mesh properly, DO
OT FORCE - this will strip the threads on the MLS-1R and/or your endoscope!
3. Using your thumb and index finger, gently rotate the thread nut clockwise (counter-clockwise if viewing MLS-1R from
above) until it stops - DO OT OVER-TIGHTE , DAMAGE COULD OCCUR
(Figure 4b).
Figure 4
Figure 4a
(Light guide post with adapters
removed)
ACMI
threads
Hold firmly

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Using the MLS-1R
1. Turn the MLS-1R ON by pressing the RED Power ON/OFF button (refer to figure 5).
2. Adjust light intensity as needed (refer to figure 6).
Pressing button next to this symbol decreases the intensity of the light.
Pressing button next to this symbol increases the intensity of the light.
3. After use, turn the MLS-1R OFF by pressing the RED power button to conserve power.
4. Remove the MLS-1R from the endoscope by loosening the thread nut (figure 5) counter-clockwise
(clockwise when viewing MLS-1R from above) and sliding the MLS-1R off the light guide post.
Upon power up, the MLS-1R drives the LED to full intensity. Avoid looking
directly at the LED or the distal tip of the endoscope when turning O .
Light Guide
Thread Nut
Light Intensity
Controls
Figure 5 Figure 6
Power
Button
Figure 7: USB Smart Battery Charger & Li-Ion Batteries
Batteries and Charger (Included)

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Standard Part Number: RCR123A (Circuit Protected)
Battery Type: Lithium-Ion (Li-Ion), rechargeable
Output Voltage: 3.7V
Capacity: 750mAh
Manufacturer/Part Number: Tenergy Item #34253
Battery Recharge Cycles: 500 charge cycles
Battery Charge Time: Up to 4 hours
Battery
Figure 8: RCR123A
Li-Ion Rechargea le
Battery
• USE ONLY APPROVED BATTERIES.
• Use only pairs of fully charged batteries. Do not mix newly charged and depleted batteries.
• Never mix rechargeable battery with non-rechargeable batteries.
• Do not incinerate, disassemble, overcharge or short circuit the battery.
• Do not expose the battery to high temperatures above 122ºF/50ºC.
WARNING
The batteries should be removed from the MLS-1R if it will not be used for an extended time.
Charging the batteries
1. Connect charger to a powered USB port or adapter. LCD on the charger will
turn on to indicate it’s properly powered.
2. Insert 1 ~ 2 battery into the slot, make sure + / - are correctly used.
3. Charging will auto start,
– Battery type screen will show the battery type being detected.
– (CHARGE) will show on the [status] screen.
4. When charging is done, ( ) will be displayed on the digital screen of the LCD.
5. Remove battery after it’s fully charged.
CHARGER: Features, Quick Reference, Specifications
Reverse / Bad Cell / Short Circuit
Reverse the battery polarity, incorrectly inserting the battery, inserting alkaline battery or short
circuit will result in charging failure, the “Error” icon will be shown on the LCD display and
capacity gauge for the corresponding slot will flash rapidly. Should this occur, please reposition / replace /
remove the battery from the slot.
Charger Features
• Manufacturer supplied charger is a 2-bay battery
smart charger with MCU control which features:
– Independent charging channels;
– Constant current and constant voltage charging;
– Ensures the quality and safety of charging
process.
• Two-color LEDs indicate charging status.
• Each LED indicates the corresponding channel.
Figure 9: Tenergy Li-Ion 2- ay
Battery Smart Charger

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• QUICK REFERENCE •
Mechanical Dimensions
Length: 130mm
Width: 68mm
Height: 38.5mm
Weight: 130g
Electrical Characteristics
Input/ utput Characteristics of Charger
Input: 5V DC 2A
Output: 4.2V DC 500mA/1 000mA (Li-ion/I MR)
3.7V DC 500mA/1 000mA (LiFePO4)
1.48V DC 500mA (Ni-MH/Ni-CD)
Status Display: Backlit LCD
Built-In Protections: Short-circuit, Reverse Polarity, Bad Cell Detection, Safety Timer
Compatible Rechargeable Battery
Ni-MH / Ni-Cd: AA / AAA / AAAA / CID / Sub C
IMR / Li-ion / LiFeP04: 18650, 26650, 22650, 18490,18350, 17670, 17500, 14500, 10440, 16340

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Important Safety Instructions
1. SAVE THESE I STRUCTIO S & CAREFULLY FOLLOW THEM, TO REDUCE THE DA GER
RISK OF FIRE OR ELECTRIC SHOCK.
2. This charger is intended for Ni-MH, Ni-CD, Li-ion, and LiFePo4 rechargeable batteries only. Attempting to
charge non-rechargeable batteries may cause personal injury and damage to the charger.
3. Do not expose charger to water or moisture. For indoor usage only.
4. Remove from power when not in use.
5. Do not operate the charger if it has been subjected to shock or damage. Take it to a qualified serviceman for
repair.
6. Do not disassemble the charger. Incorrect reassembly may result in a risk of electric shock or fire.
7. Unplug the charger from USB port before attempting any maintenance or cleaning. Use damp cloth to clean
the surface - DO OT IMMERSE I TO WATER.
8. Before scrapping your charger, remove batteries from the unit and recycle or dispose the batteries safety.
9. This appliance is not recommended for children under 8 years old or persons with reduced physical,
sensory, or mental capabilities. Adult supervision is recommended to prevent hazards that may be involved.
10. DO OT LET CHILDRE PLAY WITH THE APPLIA CE, IT IS OT A TOY.
11. Cleaning and user maintenance shall not be made by children without adult supervision.
DO NOT use charger to charge other types of batteries.
DO NOT operate the charger when the temperature is higher than 40°C. We recommend
operating when the temperature is lower than 35°C. Batteries may get warm during charging.
USE ONLY Tenergy Battery #34253 or compatible Tenergy battery.
DO NOT use charger and batteries in any acidic, alkaline or corrosive environment.
DO NOT expose charger to rain, snow, water, gas, oil, etc.
DO NOT short circuit charging terminals.
Do not expose charger to fire, water or moisture.
To avoid electrical shock, do not disassemble the charger.
No user-serviceable parts inside the charger.
Follow local regulations for disposal of electrical components or batteries.

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Slot / Mode
When 2 batteries are charging at the same time, press SLOT to select the
charging slot (1) or (2). Then you can view the individual charging information
(ie. Battery Type, Charging Status, Charging current, Charging voltage and
Charging time) for the selected charging slot.
To change charging speed: Default charging speed is 500mA, this can be
increased to 1000mA for Li-ion, IMR, and LiFeP04 batteries, to do that,
simply press MODE button once. Digital screen will show the updated
charging current. (1000mA charging current is NOT available for NIMH and
NICO).
ote: 2A USB power source is needed to charge 2x Li-ion battery at 1000mA speed
setting
Tip: It is safe to use 1A current option for Li-ion, IMR and LiFeP04 batteries as long as its
capacity is higher than 1000mAh, for capacity 1000mAh or below, please stay with the
default charging current 500ma for better battery life span.
Activate / Deactivate LiFeP04 charging mode:
To properly charge a LiFEpo4 battery (please check label on battery to identify
if it’s LiFeP04), LiFeP04 charging mode will need to be manually activated.
To do that:
1. Press “SLOT” and “MODE” buttons together.
2. Battery type screen will show [LiFeP04].
3. LiFeP04 charging mode is enabled
4. To get out of LiFeP04 charging mode, press 2 buttons together again.

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LCD Reference
A - Battery Charging Type Detection
iMH / iCd It will be shown by Auto Detection
Li-ion
LiFePo4 It will be shown O LY when the SLOT & MODE buttons are pressed,
please read SLOT / MODE before use.
B - Charging Status
CHARGE Charging starts
FI ISH Charging is finished
ERROR Charging is failed ( See more in Reverse/ Bad Cell/Short Circuit)
C - Battery Gauge
Indicates the selected charging slot ( 1 ) or ( 2 )
Charging starts and the
first block will be flashing
Charging is finished and
all blocks are shown
Charging is failed and the
whole icon will be
flashing
D - Time, Voltage, Current & Finish
Time Shows the time spent for charging
Voltage Shows the charging voltage
Current Shows the charging current
Finish Charging finish (F LL)
Time, voltage and current will be shown alternatively by 5 sec interval.

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4. Care and Maintenance
MLS-1R Cleaning
The MLS-1R is rated for water resistance. The MLS-1R is rated for slight water contact and mild detergent
cleaning solutions only. However, it should NOT BE IMMERSED in water or cleaning solutions for any
prolonged periods of time. After cleaning, remove MLS-1R from cleaning solution, dry and store the device in
a clean and dry environment.
Failure to comply with the following may result in damage to the MLS-1R and will void the
product warranty.
Use caution when cleaning the MLS-1R; some methods may be harmful and could result in extensive
damage. Manual cleaning is the recommended method. Certain cleaning agents may damage the device’s
materials. Only use water with a mild detergent such as a nonabrasive hand or dishwashing soap. Do not
immerse the MLS-1R in an ultrasonic cleaner.
Ensure that the battery hatch door is fully tightened on the O-ring seal to prevent liquid
intrusion into the battery compartment.
Never use any organic solvents to clean the MLS-1R, other than isopropyl alcohol.
Drying the MLS-1R
If the MLS-1R comes in contact with liquid, rinse with isopropyl alcohol and then dry with compressed air,
commercial compressed gas canisters or dry damp cloth.
Note: Air dry is highly recommended to reduce contamination of the o tical com onents and
reduce the ossibility of oxidation of the materials used in the construction of the MLS-1R.
Do not allow the MLS-1R to remain in liquid cleaning solution for a prolonged period of time.
In addition, thoroughly dry the battery hatch door seal around the O-ring, with compressed air or by
thoroughly wiping any excess liquid from this area, prior to removing the battery hatch door. This will prevent
any trapped fluid from entering the battery compartment and exposing the electronics to fluids.
Ensure there is no trapped liquid between the battery hatch door and body prior to removing the
battery hatch door.
Battery hatch door area:
keep clear of liquids when
opening to prevent fluids
from entering battery
compartment.

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5. Troubleshooting
PROBLEM POSSIBLE CAUSE ACTIO
Loss of Illumination
Battery charge is low Replace batteries with freshly charged
batteries.
Batteries cannot supply sufficient
current at this power setting
Replace batteries with freshly charged
batteries.
Verify batteries have been installed in the
correct orientation.
Reduce the light intensity and continue
using the current battery. Recharge the
batteries as soon as possible.
Battery mismatch Make sure both batteries are the same type
and freshly charged.
MLS-1R Light output
flashing
Battery charge is low Reduce the light intensity and continue
using the current battery.
This is normal behavior indicator
when the battery charge is low.
Remaining run time is about 2
minutes.
Recharge the batteries as soon as possible.
Light Guide does not attach
properly to the endoscope
The endoscope has an adapter on its
light post
Remove the adapter and try attaching
again.
The endoscope and MLS-1R do not
have a compatible coupling system
Switch to a different MLS-1R with the
proper adaptor
Light intensity is low Foreign material or film on LED
output taper
VERY carefully clean the LED surface
from visible contamination with a cotton
swap and isopropyl alcohol. Do not use
acetone or other solvents.
MLS-1R becomes hot after
prolonged use at full power
MLS-1R has been left on for more
than 30 minutes at full power.
Turn the MLS-1R to a lower intensity
setting if the examination must continue
past 30 minutes.
Turn the MLS-1R OFF for a few minutes
to permit adequate cool down of the body.
6. Limited Warranty
ESS Inc. warrants the MLS-1R LED Light Source, when new, to be free of defects in material and
workmanship and to perform in accordance with the manufacturer’s specifications when subject to normal use
and service for a period of one (1) year from the date of purchase from ESS or an authorized agent. ESS
will either repair or replace any components found to be defective or at variance from the manufacturer’s
specifications within this time at no cost to the customer. It shall be the purchaser’s responsibility to return the
instrument to the authorized distributor, agent, or service representative.
All non-warranty repairs will be warranted to be free from defects in materials and workmanship for a period
of ninety (90) days from the date of the invoice.
This limited warranty does not cover the breakage or failure due to tampering, misuse, neglect, accidents,
improper installation, modification, shipping, or to improper maintenance, service, fluid invasion and cleaning
procedures. This limited warranty is also void if the instrument is not used in accordance with the
manufacturer’s recommendations or if required service is performed by anyone other than ESS or an
authorized agent. The purchase date determines limited warranty requirements. No other express or implied
limited warranty is given.
Suitability for use of the device for any procedure shall be determined by the user. ESS Inc. shall not be liable
for incidental or consequential damages of any kind.

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7. Agency Approvals
The MLS-1R has been tested to, and found in conformance with, the following standards:
EN50581:2012
2006/95/EC (93/68 EEC) – Low Voltage Directive
IEC 62471:2006 LED Photobiological safety lamp standard, categorized as Risk Group
2 (Moderate risk).
2011/65/EU – RoHS Directive
WEEE
8. Vendor Information
ESS, Inc.
3 Fallsview Lane
Brewster, NY 10509
Web: www.endoscopy.com
ESS Service Dept.: www.endoscopy.com/service
Toll Free (U.S. only): 1-800-349-3636
Phone: [phone]
Fax: [phone]
Service Fax: [phone]

3 Fallsview Lane • Brewster, NY 10509
Ph: [phone] • Fx: [phone]
E: [e-mail]
Web:
www.endoscopy.com
Service Department
[phone] ( .S. Only)
Outside .S.: [phone]
E: [e-mail]
Web: endoscopy.com/Service
Repairs: endoscopy.com/Repair