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ELS Electrolyte Level Sensor and ELSi
Electrolyte Level Sensor Interface
Product Description and Installation Guide
Vertiv Corporation
1050 Dearborn Drive
Columbus, OH 43085
Tel: (954) 377-7101
www.vertivco.com
590-2112-501A/SL-29427/4200–117
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The information contained in this document is subject to change without notice and may not be suitable
for all applications. While every precaution has been taken to ensure the accuracy and completeness of
this document, Vertiv assumes no responsibility and disclaims all liability for damages resulting from use
of this information or for any errors or omissions. Refer to other local practices or building codes as
applicable for the correct methods, tools, and materials to be used in performing procedures not
specifically described in this document.
The products covered by this instruction manual are manufactured and/or sold by Vertiv. This document
is the property of Vertiv and contains confidential and proprietary information owned by Vertiv. Any
copying, use or disclosure of it without the written permission of Vertiv is strictly prohibited.
Notice to Users
Vertiv Corporation reserves the right to make changes to this document without notice to any user or
reseller of this product. Vertiv Corporation also reserves the right to substitute or terminate distribution
of this document, with no obligation to notify any person or party of such substitutions or terminations.
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Vertiv Customer Service
Vertiv Customer Service is available Monday to Friday, 8:00AM to 4:30PM Eastern Time.
Telephone: (954) 377-7101
Email: alber-service@vertivco.com
Web site: www.vertivco.com
Corporate Office Address:
Vertiv Corporation
1050 Dearborn Drive
Columbus, OH 43085 USA
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Table of Contents
1. Product Description .....................................................................................................1-1
1.1 ELS Sensor Module System Features ................................................................... 1-1
1.2 ELSi Interface Module System Features ................................................................ 1-1
1.3 ELS Temperature Control Module (ETCM) System Features ................................ 1-2
2. Materials Received List ...............................................................................................2-1
2.1 Parts List ............................................................................................................... 2-1
2.2 Optional Parts List ................................................................................................. 2-3
3. ELSi Interface and ELS Sensor Module Connection .................................................3-1
3.1 Connecting the ELSi Interface Module ................................................................... 3-1
3.2 Mounting the ELS Sensor on the Battery Case ...................................................... 3-2
3.3 Connecting the ELS Sensor Module ...................................................................... 3-4
3.4 Calibrating the ELS Sensor module ....................................................................... 3-5
3.5 Testing the ELS Sensor Module ............................................................................ 3-6
3.6 Troubleshooting ..................................................................................................... 3-7
4. Monitoring the ELSi Interface Module and ELS Sensor Configuration ....................4-1
4.1 ELSi Interface Module and ELS Sensor Configuration Diagram............................. 4-1
5. Optional ELS Temperature Control Module ...............................................................5-1
5.1 About the ELS Temperature Control Module ......................................................... 5-1
5.2 Connecting the ELS Temperature Control Module ................................................. 5-1
5.3 ELS Temperature Control Module Configuration Diagram ..................................... 5-2
6. Specifications ..............................................................................................................6-1
6.1 ELSi Interface Module ........................................................................................... 6-1
6.2 ELS Sensor Module ............................................................................................... 6-1
6.3 Optional ELS Temperature Control Module ........................................................... 6-2
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List of Figures
Figure 1 - ELSi Interface Module Calibration Button ................................................................ 1-1
Figure 2 - ELSi Interface Module ............................................................................................. 3-1
Figure 3 - ELSi Interface Module Alarm Contacts Jack ........................................................... 3-2
Figure 4 - Positioning the ELS Sensor Module on Battery Case .............................................. 3-2
Figure 5 - Adding Bonding Adhesive to the ELS Sensor Module and attach to Battery Case .. 3-3
Figure 6 - ELS Sensor Module Connectors ............................................................................. 3-4
Figure 7 - ELSi Interface and ELS Sensor Module Connections ............................................. 3-4
Figure 8 - ELS Electrolyte Level Sensor Module Calibration Button ........................................ 3-5
Figure 9 - ELSi Interface Module Alarm Reset Button ............................................................. 3-6
Figure 10 - ELS Module Test Mode Button ............................................................................. 3-6
Figure 11 - ELSi Interface and ELS Sensor Module Configuration Diagram ............................ 4-1
Figure 12 - ELS Temperature Control Module Connections .................................................... 5-1
Figure 13 - ELSi Interface, ELS Temperature Control and ELS Sensor Module Connections . 5-2
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1. Product Description
The ELS Electrolyte Level Sensor is a non-invasive level sensor designed for quick installation and easy
set up. This device complies with the NERC PRC-005 requirements for electrolyte level inspection. With
this sensor, you eliminate unnecessary remote site visits. This device will eliminate the required
quarterly inspection of battery electrolyte levels in your battery string.
1.1 ELS Sensor Module System Features
Features for the ELS Sensor module includes:
• Equipped with two RJ11 connectors for system interface and alarm notification
• Front panel status indicators for easy alarm identification and system functional status
• low electrolyte levels
• power loss
• Automatic reset of alarms
• Easily integrates into Vertiv Battery Monitors (UXIM, BDS Series) or Building Management Systems.
1.2 ELSi Interface Module System Features
Features for the ELSi interface module includes:
• Equipped with two Form C relay contacts, (2A at 30Vdc) for system interface and alarm notification
• Front panel status indicators for easy alarm identification
These alarms include:
• low electrolyte levels
• power loss
• system bus integrity
• Automatic or manual reset of alarms
• Easily integrates into Vertiv Battery Monitors (UXIM, BDS Series) or Building Management Systems
Note: Before connecting the ELSi interface module, decide if you want the alarms to be latched or
automatically reset. The ELSi interface module includes a JP1 jumper which is used to automatically
reset the alarms once all the ELS sensor module alarms are cleared. The default on the JP1 jumper is set
to out. This allows all alarms to be latched and will not be reset until you manually reset the alarms on
the ELSi interface module by pressing the button on the right side of the module. All alarms on the ESL
sensor modules must be cleared before resetting the alarm on the ELSi interface module.
Figure 1 - ELSi Interface Module Calibration Button
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1.3 ELS Temperature Control Module (ETCM) System Features
The ELS Temperature Control Module (ETCM) is an optional module for cold climates which includes the
following features:
• Equipped with an ambient temperature sensor to detect uncontrolled cold temperatures for
interruption of false alarm notifications.
• Easy to view and set temperature settings for trigger points to cut off false alarms via a rotary
switch.
• Easily integrates into Vertiv Battery Monitors (UXIM, BDS Series) or Building Management Systems
via the ELSi.
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2. Materials Received List
The following is a list of materials received with your shipment. Refer to the packing slip delivered with
the equipment for a complete list of materials supplied. Vertiv suggests you inventory all materials to
ensure the order is complete. Report any shortages to Vertiv immediately.
The model number is in the format of PPPP-COB, where PPPP is 1010 and C, O, and B are described
below.
PPPP–
C O B
Description
Choices
1108
C
Communications
0 = RS-485 Only
1 = Network
2 = Fiber Optic
3 = Network and Fiber Optic
1108
O
Options
0 = None
1–9 = Reserved
1108
B
Branding
0 = OEM
1–9 = Reserved
Table 1 - Model Number Description
2.1 Parts List
The following is a list of all the parts associated with the UXCT battery monitor installation. If any parts
are missing please contact your Vertiv representative.
Part Number
Photo/Drawing
Description
1108-150
Electrolyte level sensor module
Up to 60 modules per system
1108-151
ELSi Controller module
One module per system
Table 2 - Inventory List
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Part Number
Photo/Drawing
Description
1108-160-RXX
6P/4C RJ11 12” Cross
Up to 58 wires per system
RXX = Length in inches
1108-161-XX
6P/4C RJ11 10’ Cross
One wire per system
6P/4C RJ11 20’ Cross
Two wires per system
XX = Length in feet
1108-162-XX
ELSi alarm interface 25’ cable
One cable per system
1600-006
Acoustic couplant adhesive, 90 ml tube
One tube per system
4000-041
115Vac to 12 VDC Power adapter
One power supply per system
6003-001
Power cord
One power cord per system
590-2112-501A/
SL-29427/
4200-117
ELS Product Description Guide and
Installation Guide
One guide per system
Table 2 - Inventory List (Continued)
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2.2 Optional Parts List
The following are optional parts when the battery system is located in an uncontrolled cold
environment. If these parts are needed, please contact your Vertiv representative.
Part Number
Photo/Drawing
Description
1008-153
ELS Temperature Control Module
One module per system
1108-160-RXX
6P/4C RJ11 12” Cross
Up to 2 wires per system
RXX = Length in inches
1108-164-50
ELS Temperature Control Module ambient
temperature sensor
1 sensor per system
50 feet
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3. ELSi Interface and ELS Sensor Module
Connection
3.1 Connecting the ELSi Interface Module
The table below describes where the connections go on the ELSi interface module.
Figure 2 - ELSi Interface Module
Power source
Connect the supplied power supply to the power jack on the side
of the ELSi interface module.
Ground cable
The ground on the ELSi must be connected to earth ground to
ensure the proper operation of the ELS sensor module.
Note: This ground cable is not a safety related ground.
ELS “Out” jack
The RJ11 ELS “Out” jack connects the cross-over 4 pin phone cable
from the ELSi interface module to the “In” jack on the first ELS
sensor module.
ELS “In” jack
The RJ11 ELS “In” jack connects the cross-over 4 pin phone cable
from the ELSi interface module to the “Out” jack on the last ELS
sensor module for a continuous loop.
Alarm Contacts jack
There are two sets of form “C” Contacts and can be connected
directly to a Vertiv monitoring system or Building Management
System. See figure 3 ELSi Interface Module Alarm Contacts Jack for
more detail.
Note:
• For connecting to BDS-256 battery monitors, the optional
digital input module will need to be installed.
• For connecting to UXIM or UXTM battery monitors, the
optional digital inputs should be configured as dry contact
inputs.
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Figure 3 - ELSi Interface Module Alarm Contacts Jack
3.2 Mounting the ELS Sensor on the Battery Case
Use the ELS sensor module “LOW LEVEL TRIGGER” graphic on the label to position and mount the ELS
sensor module even with the low electrolyte level line on the battery case. To attach the ELS sensor
modules to the batteries, use a small amount of the provided adhesive and a thin strip of 3m gel tape as
a temporary support to mount the ELS sensor modules to the side of the batteries.
Figure 4 - Positioning the ELS Sensor Module on Battery Case
1. For mounting the ELS sensor, follow these steps:
Verify the electrolyte level in the battery is over the middle level between the low and high-level
lines. If the electrolyte is below the average level, add more distilled water.
2. Clean battery case surface where sensor will be mounted.
a. Remove moisture, dirt, oil, grease and dust using baking soda and water.
b. Remove any excess baking soda and water using a rubbing alcohol and wipe it dry.
3. Clean the surface of the ELS module with rubbing alcohol and wipe dry.
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4. Place a thin strip of the 3m gel tape on the bottom of the sensor, and apply a small amount of
the adhesive (3/4 ” Length by 1/4” Width by 1/4 ” depth ) on the side of the sensor that is facing
the battery case. See Figure 5 Adding Bonding adhesive to the ELS Sensor Module and attach to
Battery Case for details.
Figure 5 - Adding Bonding Adhesive to the ELS Sensor Module and attach to Battery Case
5. Peel off the protective cover on the gel tape.
6. Place the sensor on the battery case.
a. When mounting the sensor, apply firm pressure in order to push out any air bubble that
could exist inside the adhesive layer.
b. Check to make sure that the trigger level line in the sensor is aligned correctly with the
low-level line on the battery case.
7. Connect power to the sensor.
8. Press the calibration button twice.
a. The ELS will calibrate by performing 16 readings of the base line signal. The green LED
will blink showing the occurrence of those readings.
b. The red LED indicates the quality of the bonding that was just applied as follows:
• OFF: Good coupling.
• FAST blink: Coupling is not good, but the device is able to work. Recommended to
reseat the sensor.
• Solid ON: Bad acoustic coupling. Sensor needs to be reseated.
c. After the calibration process finishes, the sensor will continue its normal operation. If
the electrolyte level is below the lower limit for 1 hour, the red light comes on indicating
additional electrolyte need to be added.
9. After finishing the installation of all sensors, press the calibration button three times for three or
more seconds each time.. The red LED flashes, indicating the ELS is currently in self-calibration
mode. In this mode of operation, the sensor will perform a calibration every 10 minutes for 24
hours (this happens during the adhesive’s curing time).
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3.3 Connecting the ELS Sensor Module
The following table describes where the connections go on the ELS sensor module.
Figure 6 - ELS Sensor Module Connectors
“In” jack
The RJ11 “In” jack on the first ELS sensor module connects the
cross-over 4 pin phone cable from the ELSi interface module
“Out” jack.
“Out” jack
The RJ11 “Out” jack connects the cross-over 4 pin phone cable
from the first ELS sensor module to the “In” jack on the second
ELS sensor module. This is the same for each additional ELS
sensor module on the battery string. For example, The “Out” jack
on the second ELS sensor module goes to the “In” jack on the
third ELS sensor module. The RJ11 “In” jack connects the crossover 4 pin phone cable from the ELSi interface module to the
“Out” jack on the last ELS sensor module for a continuous loop.
The following diagram illustrates how the ELSi interface module and ELS sensor modules are connected
on a string of batteries.
Figure 7 - ELSi Interface and ELS Sensor Module Connections
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3.4 Calibrating the ELS Sensor module
Use the Calibration button on the ELS sensor module to calibrate the ELS sensor alarms. This provides an
indication of the quality of the acoustic coupling. Do this by pressing the Calibrate button twice on each
ELS sensor module.
During the calibration process, the red LED indicates the quality of the acoustic coupling as follows:
• Off: Good coupling.
• Fast blink: Coupling is not good, but the device is able to work. It is recommended to reseat the
sensor.
• Solid On: Bad acoustic coupling. Sensor must be reseated.
Figure 8 - ELS Electrolyte Level Sensor
Module Calibration Button
Note: Prior to calibration, the green LED is pulsing. The red LED
may or may not be off. Ensure electrolyte level is at a normal
level.
During setup, press the Calibrate button twice, the green LED
will start to blink rapidly. After calibration, the green LED will
pulse normally. Every 10 seconds the ELS sensor module will
take a reading. While the readings are being taken, the green
LED will be steady for about one second and then will continue
to pulse normally until the next reading occurs.
During the reading if the red LED lights up, the electrolyte level
is low. If the red light does not light up, the electrolyte level is in
the normal (or calibrated) level
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3.5 Testing the ELS Sensor Module
1. Verify there are no active alarm conditions by confirming that no red LEDs are active on any of
the ELS sensor modules. If there are, ensure the electrolyte level is at a normal level and retry
the calibration on the ELS sensor module.
2. Reset any active or latched alarms that may be occurring due to the initial setup and calibration.
To reset active alarms, press the reset button on the side of the unit. See Figure 9.
Figure 9 - ELSi Interface Module Alarm Reset Button
3. Apply power to the ELS module while pressing and holding the calibration button. The red LED
will start to flash quickly indicating the ELS is test mode.
Figure 10 - ELS Module Test Mode Button
4. Lower the electrolyte level in the battery cell so the electrolyte goes below the trigger line on
the ELS sensor module. The Alarm LED will turn red once the unit performs the test.
5. Verify the system alarm LED activates on the ELSi interface module.
Note: During the active alarm, the Sensor Fault relay is activated.
6. Clear the alarm condition on the ELS module by returning the electrolyte back to a normal level.
The red alarm LED will turn off on the ELS sensor module.
7. If JP1 is installed, the alarm LED and alarm relay on the ELSi interface module will turn off at the
same time the ELS module returns to normal.
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If JP1 is not installed, the alarm LED and alarm relay on the ELSi interface module will remain on
when the electrolyte level is returned to normal. To reset the alarm, press the reset button on
the side of the ELSi interface module. See Figure 9.
8. After completing the test, turn Off then On the power to all the sensors, which allows each
sensor to leave test mode and enter into normal mode of operation.
3.6 Troubleshooting
If the ELS sensor module does not activate an alarm when the electrolyte level is lowered, there could
be air bubbles in the adhesive applied in-between the ELS sensor module and the battery. To confirm
this, remove the ELS sensor module from the battery, remove any residue of adhesive from the battery
case and sensor and reapply new adhesive. After the new adhesive is installed, double check that the
electrolyte level is at the proper level and recalibrate the ELS sensor module.
Note: Alarms on all ELS sensor modules must be cleared before you can reset the system alarm on the
ELSi interface module.
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4. Monitoring the ELSi Interface Module and ELS
Sensor Configuration
4.1 ELSi Interface Module and ELS Sensor Configuration Diagram
This diagram shows how the ELS sensor indicates an alarm when the electrolyte level in the battery gets
too low.
Figure 11 - ELSi Interface and ELS Sensor Module Configuration Diagram
The following Monitoring scenarios will occur after the installation and calibration are complete. On the
ELSi interface module, the panel indicators will show the following:
• Green LED – indicates power to the ELSi interface module.
• Red LED – indicates that one or more of the batteries in the string does not have the proper
electrolyte level and received a system alarm from one of the ELS sensor modules. It could also be
that the system bus has a connection failure or loss of power.
On the ELS sensor module, the panel indicators will show the following:
• Green LED – pulsing green LED indicates proper operation of the ELS sensor module. Every 10
seconds the green LED stays lit to show that the ELS sensor module is taking an electrolyte reading.
• Red LED – indicates that the battery does not have the proper electrolyte level and received a
system alarm.
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5. Optional ELS Temperature Control Module
5.1 About the ELS Temperature Control Module
The ELS system has an optional ELS Temperature Control module that is used in cold climates. The ELS
Temperature Control module allows you to prevent false alarms to the ELSi module in an uncontrolled
cold climate. When the ELS Temperature Control module is set on a specific temperature and meets that
setting, the module blocks all false alarms when the ambient temperature reaches the set temperature.
The temperature setting can range from 8C to 15C (46F to 59F). When the temperature warms up,
the ELS Temperature Control module will no longer block alarms. The ELSi module will return back to its
normal operating mode.
5.2 Connecting the ELS Temperature Control Module
The following table describes how to connect the ELS Temperature Control module.
Figure 12 - ELS Temperature Control Module Connections
“In” jack
The RJ11 “In” jack on the ELS Temperature Control module
connects to the ELSi interface module “Out” jack.
“Out” jack
The RJ11 “Out” jack connects on the ELS Temperature Control
module and connects to the first ELS sensor module to the “In”
jack.
Ambient temperature sensor
connections
The 2 wire temperature sensor connects to the screws on the left
hand side of the ELS Temperature Control module. The
Temperature sensor comes with a 50 foot cable to be placed in
the desired location in the battery room.
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5.3 ELS Temperature Control Module Configuration Diagram
The following diagram illustrates how the ELSi interface module, ELS Temperature Control module and
ELS sensor modules are connected on a string of batteries.
Figure 13 - ELSi Interface, ELS Temperature Control and ELS Sensor Module Connections
The following Monitoring scenarios will occur after the installation and calibration are complete. On the
ELS Temperature Control Module, the panel indicators will show the following:
• Power Green/Off LED – Green indicates power to the ELS Temperature Control Module. Off
indicates no power is connected to the module.
• Alarm Interrupt Blue/Off LED – Blue indicates that an uncontrolled cold temperature is detected
and the ELS Temperature Control will not allow false alarms to trigger the ELSi. Off indicates that
alarms are not blocked and running in normal operation mode.
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6. Specifications
6.1 ELSi Interface Module
LEDs
Red LED – System Alarm
Green LED – Status/Power
Alarms
2 Form C relay contacts (2A at 30Vdc)
Alarm reset button
Input Power
AC Powered – 100V - 240V AC 0.5A/12VDC
Output Power
DC Powered – 12V DC 1.25A
Grounding
Earth to ground cable
Communications
RJ11 to ELSi interface module
Packaging
ABS Plastic Housing
4.25” W (5.25” w/flange) x 1.45” H x 3.00” D
Mounting: Two .20” holes located 4.75” or 3M adhesive gel tape.
6.2 ELS Sensor Module
LEDs
Red LED – Low Level Alarm
Green LED – Status / Power
Input Power
12VDC via RJ11 from the ELSi interface module
Communications
RJ11 to ELS sensor module
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Packaging
ABS Plastic Housing
1.80” W x 1.59” H x 0.5” D
Mounting: Adhesive (Contact your Vertiv Sales Representative for the correct part number for your
specifically required adhesive.)
Operating Environment
Temperature range: 10C to 40C (60F to 110F)
Humidity range: 0% to 80% RH (non condensing) at 10C to 31C.
0% to 50% RH (non condensing) at 32C to 40C.
Indoor use only.
6.3 Optional ELS Temperature Control Module
LEDs
Green LED – Status / Power
Blue LED – Uncontrolled cold climate alarm
Input Power
12VDC via RJ11 from the ELSi interface module
Communications
RJ11 to ELSi and ELS sensor module
Packaging
ABS Plastic Housing
4.25” W (5.25” w/flange) x 1.45” H x 3.00” D
Mounting: Two .20” holes located 4.75” or 3M adhesive gel tape.
Operating Environment
Temperature range: 8C to 15C (46F to 59F)
Humidity range: 0% to 80% RH (non condensing) at 10C to 31C.
0% to 50% RH (non condensing) at 32C to 40C.
Indoor use only.
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