EMS TOM-2B User manual

TOM-2 Operators Manual
Revision D, Copyright ©2022, EMS Healthcare LLC, all rights reserved
1
Operators Manual
For Part Number TOM-2095B
TOM-2 Total Oxidizer Monitor w/Mitigation
1370 Harlan Street
Lakewood, CO 80214
303-952-5043
www.EMSHealthcareLLC.com

TOM-2 Operators Manual
Revision D, Copyright ©2022, EMS Healthcare LLC, all rights reserved
2
Table of Contents
System Overview........................................................................................................................................ 3
Models......................................................................................................................................................... 3
System Specifications................................................................................................................................. 4
System Installation...................................................................................................................................... 5
Facility Requirements............................................................................................................................. 5
Facility Wiring........................................................................................................................................ 6
Mitigating Gas ........................................................................................................................................ 7
Initial Power Application........................................................................................................................ 7
System Operation........................................................................................................................................ 9
System Configuration ............................................................................................................................. 9
Settings.................................................................................................................................................... 9
Sensor Calibration................................................................................................................................. 12
Statistics................................................................................................................................................ 13
Faults..................................................................................................................................................... 14
Data Trend ............................................................................................................................................ 15
Data Logging ........................................................................................................................................ 15
LOGA01 Data Table - Example ........................................................................................................... 16
LOGA02 Data Table - Example ........................................................................................................... 16
System Maintenance................................................................................................................................. 18
Annual Compliance Reporting ............................................................................................................. 18
Periodic Sensor Check.......................................................................................................................... 18
System Troubleshooting ........................................................................................................................... 18
O2 Concentration at Vacuum Pressure................................................................................................. 18
Password Screen ................................................................................................................................... 18

TOM-2 Operators Manual
Revision D, Copyright ©2022, EMS Healthcare LLC, all rights reserved
3
System Overview
With the introduction of NFPA 99 2012 edition came an entirely new requirement for medical-surgical
vacuum systems that are also used for Waste Anesthetic Gas Disposal (WAGD). For these combined-use
systems, the NFPA now requires the total concentration of oxidizers (oxygen and nitrous oxide) be
maintained below 23.6 percent or the materials, lubricants, and sealants within the vacuum pump be inert
to these oxidizers for new installations (reference section 5.1.3.8.1.2. (2)). The NFPA 99 2018 edition
imposes this requirement on all (existing and new) combined-use vacuum systems and the 2021 edition
removes nitrous oxide from the requirement.
The TOM-2 Total Oxidizer Monitor (patent pending) from EMS Healthcare, LLC is a gas monitoring and
mitigation system that’s ideal for the continuous regulation of oxygen below the limit of 23.6 percent in
combined-use vacuum systems. The heart of the monitoring & mitigation system is a PLC that interfaces
to an oxygen sensor, a vacuum transducer, and a control valve. The unit monitors oxygen concentration
and vacuum pressure and takes appropriate action based on these input parameters. The PLC will operate
a valve plumbed to a regulated gas source (e.g., carbon dioxide or nitrogen) or ambient air to maintain
levels below the critical threshold of 23.6%. Maintaining system vacuum pressure is always prioritized
over oxygen levels; as long as vacuum pressure remains acceptable, increasing oxygen levels to the
vacuum pump inlet will be mitigated.
Models
The TOM-2B (part number TOM-2095B) performs both oxygen monitoring and mitigation and is
recommended for use in both in-patient and out-patient facilities where oxygen concentrations may exceed
the NFPA 99 threshold of 23.6%. The TOM-2B continuously monitors and logs total oxygen
concentration in order to provide periodic reports for compliance purposes.
The TOM-2B features a zirconium oxide O2 sensor with a life span of 10 years of continuous operation.
Sensor behavior is very stable under nominally changing environmental conditions of temperature,
pressure, and humidity. Because of its stability, the sensor requires only periodic testing to verify the
sensor remains calibrated for accuracy.

TOM-2 Operators Manual
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4
System Specifications
Part Number
TOM-2095B
Description
Oxygen monitoring and mitigation, vacuum pressure monitoring, alarm relay
output, data logging
Performance
Response Time
Within 1 second of any change in oxygen levels
Accuracy
± 0.5% of FS
Repeatability
± 1% of reading
Operating Temp
-40° to 122°F (-40° to +50°C)
Humidity
0 –98% RH, non-condensing
Data Logging
Oxygen concentration and Vacuum Pressure readings logged every 10 seconds
Alarm Output
2-wire dry contact, normally closed (open on alarm of 23.6% O2)
Oxygen
Monitoring
Range
0 –95% oxygen concentration
Sensor Connection
1/2”NPT male threaded connection
(connectorized 5m signal cable to control unit)
Vacuum
Pressure
Monitoring
Range
0 –30 in Hg, vacuum range
Sensor Connection
1/4”NPT male threaded connection
(connectorized 5m signal cable to control unit)
Gas
Mitigation
Gas Type
Carbon dioxide, nitrogen or ambient air (with included muffler)
Gas Pressure
5 –10 psig (operating pressure range at valve inlet port)
Gas Connection
1/2”NPT female threaded connection
Valve Power
Power supplied by control unit
(10 ft cord to control unit)
Electrical
Voltage Source
110-120 VAC, 60 Hz
Power (max)
19 Watts including solenoid valve and transducers
Physical
(Control
Unit)
Dimensions
8”(W) x 12”(H) x 6”(D)
Weight
10.0 pounds (4.5 kg) including solenoid valve and transducers
Enclosure Type
NEMA 1,2,4,4X rated, polycarbonate, indoor/outdoor use

TOM-2 Operators Manual
Revision D, Copyright ©2022, EMS Healthcare LLC, all rights reserved
5
System Installation
Facility Requirements
TOM-2B installation must be performed by a qualified technician trained by EMS Healthcare LLC.
The TOM-2B comes pre-wired with an oxygen concentration monitoring sensor on a connectorized 5-
meter cable, a vacuum pressure sensor on a connectorized 5-meter cable, and a solenoid-operated
mitigation valve on a 5-meter hardwired cable for installation into the facility vacuum system.
The TOM-2B enclosure should be mounted vertically on or near the vacuum pump skid to allow
installation of the sensors and valve into the facility vacuum system as indicated in the diagram below.
See Specifications for enclosure dimensions.
NOTE: The mitigating valve must be installed at least 1 meter upstream of the O2 sensor to allow
proper mixing of the mitigation gas. The vacuum transducer should be installed 1 meter (if possible)
upstream of the mitigating valve to monitor patient-side vacuum levels during mitigation. If there are
questions during installation, contact EMS Healthcare for installation guidance.
PUMP
PUMP
WAGD
from
Facility
Exhaust
O2
Pv
Mitigating
Gas
Receiver
Tank

TOM-2 Operators Manual
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6
Facility Wiring
Electrical installation must be performed by a qualified electrician.
1. Power Input - The TOM-2B requires 110VAC electrical power (2-conductor plus ground) wired
into it. The power input connections are to be made at terminal blocks inside the unit enclosure.
2. Solenoid Valve Wiring –The TOM-2B comes with a type-LB conduit body and wire nuts for
completing wiring terminations at the solenoid valve electrical interface. The solenoid valve
operates with 24VDC so the RED (V+) and BLACK (V-) wires from the TOM-2B unit should be
connected to the RED wires at the solenoid. The WHITE wire from the TOM-2B is a grounding
wire and should be connected to the GREEN wire at the solenoid interface.
3. O2 Alarm Relay Output –The TOM-2B includes an O2 Alarm relay output (2-wire dry contact,
normally closed) that can be wired to the facility master alarm panel. This relay output will open
when an O2 Alarm is indicated (23.6% O2 is exceeded) or when a loss of 110VAC power to the
unit occurs. See below for where these connections can be found within the TOM-2B enclosure.
Insert 110VAC armored cable
(or equivalent) wiring thru left
wiring port
Hot/Black Wire to
Circuit Breaker input
Ground/Green Wire to
Green/Yellow Ground Terminal
Neutral/White Wire
to White Terminal

TOM-2 Operators Manual
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7
.
Mitigating Gas
The mitigation of high oxygen levels can be implemented with ambient air, carbon dioxide gas, or nitrogen
gas.
For in-patient facilities, the combined WAGD systems typically have large system volumes such that,
when oxygen is introduced into the system, its contribution to the overall percentage of gases is small and
easily mitigated by dilution in the total system volume or by introduction of a small amount of mitigating
gas. Therefore, ambient air is suggested as the initial mitigating gas for these in-patient facilities. The
TOM-2B comes equipped with an air inlet filter/muffler on the solenoid valve for installations where
ambient air will be used. After installation, if the system shows recurring O2 alarms with ambient air
mitigation, carbon dioxide or nitrogen may be required as a mitigating gas.
For out-patient facilities and surgery centers, the rise rate and peak level of oxygen concentration in the
system during facility use can be much higher than what is seen in an in-patient facility due to smaller
system volumes. Therefore, it is suggested that these facilities use carbon dioxide or nitrogen as a
mitigating gas to more rapidly respond to increasing oxygen levels detected by the TOM-2B. See the
Specifications page for gas connection sizing and acceptable pressure input levels if carbon dioxide or
nitrogen gas will be used.
The mitigating gas valve should be installed at a point where all vacuum system input is consolidated to
one line upstream of the vacuum pumps. Larger valve sizes (3/4” and 1”) are available if the vacuum
pump system requires higher flow.
Initial Power Application
On initial application of 110VAC power following system installation, the system will power up with
initial settings entered from the factory. The touch screen on the front cover of the unit will power on and
show the TOM-2B MAIN PANEL. Verify that the following steps occur automatically:
1. Initial System Mode indicates “WARMING UP”and then transitions to “MONITORING”after
about 2 minutes.
Q1 and COM1 are the
O2 Alarm relay output
terminals

TOM-2 Operators Manual
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8
2. Once System Mode indicates “MONITORING”, O2% and Vacuum Pressure readings are
displayed.
Once the unit is operational, the installer should baseline the O2 sensor concentration for the facility
location and altitude. This is done by exposing the sensor to ambient air for at least 2 minutes and
recording the concentration reading. This baseline reading can then be used to ensure the O2 sensor is
not drifting during annual maintenance checks. Refer to “Periodic Sensor Calibration” under the System
Maintenance section in this manual for the calibration process.
TOM-2B MAIN Screen
ALRM STATUS
NO ALARM (green) = O2 levels
are being maintained below
alarm limit
ALARM (red) = O2 level has
exceeded alarm limit
O2 STATUS
IN RANGE (green) = O2 is in
expected range
TOO HIGH (yellow) = O2 is at
elevated levels, mitigation is
activated
SYS HEALTH
NO FAULTS (green) = healthy
FAULT (red) = system has
detected one or more faults
22.1“Hg
14.2 %
INPUTS
O2 SENSR = absolute oxygen
concentration (1 –95%)
VAC PRESS = vacuum
pressure (0 –29 in Hg)
VACUUM STATUS
IN RANGE (green) = vacuum pressure is in range
for mitigation (MITIGATE mode only)
TOO LOW (yellow) = vacuum pressure is too low
for mitigation (MITIGATE mode only)
SYS MODE
WARMING UP (blinking yellow) = system is
warming up (approx. 2 minutes)
MONITORING (green) = system is
monitoring nominal O2 levels
MITIGATING (blinking green) = system is
mitigating elevated O2 levels
MONITOR ONLY (yellow) = system is in
“monitor only” mode –no mitigation

TOM-2 Operators Manual
Revision D, Copyright ©2022, EMS Healthcare LLC, all rights reserved
9
System Operation
System Configuration
The TOM-2B provides a touch screen display interface that allows the user to monitor system operations
and adjust configuration settings as needed. TheMAIN screen (as shown above) allows access to Settings,
Calibrations, real-time data trending, system statistics, and system faults by pressing MENU on the
display. The MENU screen (shown below) also displays the date/time and the software version loaded
into the PLC.
MENU Screen
Settings
Access to this screen is password protected to prevent unauthorized personnel from changing system
settings after initial system installation.
The Settings screen (below) enables the operator to modify settings for the mitigation solenoid valve
operation setpoints and vacuum override as well as change the TOM-2B mode (monitor only or mitigate)
and reset system statistics.

TOM-2 Operators Manual
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10
SETTINGS Screen
1. Limits –This section describes the limits and recommended settings based on the type of facility
the unit is installed in. All settings will remain active even after a power reset.
a. O2 Monitoring
i. The TOM-2B continuously monitors O2% levels against the alarm limit thresholds.
1. O2% - This measurement shows instantaneous O2 concentration values and
is used by the PLC to determine when mitigation is required. This
measurement is shown on the MAIN screen and on the TREND CHART
screen. Min/max values can be found on the STATS screen.
2. O2% Filtered –This measurement is generated by averaging O2% values
over a 60 second period and is used to determine when to trigger the O2
alarm. This measurement is shown on the TREND CHART screen and
min/max values can be found on the STATS screen.
ii. If the system detects an O2% above the O2 Alarm limit for a sustained period of
time (O2% Filtered), the system will open the O2 Alarm relay, sending an
indication to the Master alarm panel if this relay output is wired to the facility panel.
If this situation occurs, the facility should develop a procedure to physically
monitor the vacuum system pumps, inspect the O2% reading on the TOM-2B and,
if the reading is below the O2 alarm limit of 23.6%, reset the O2 alarm. Then
contact the TOM-2B installation agency for further evaluation of the system to
understand the cause and determine whether TOM-2B setting adjustments are
required.
b. O2 Mitigation settings (Mitigation mode only)
i. O2 Mitigation is only enabled when vacuum system pressure is above the Vacuum
Override limit (factory default setting is 15.0 in Hg). The operator can adjust
mitigation valve Open Setpoint, Close Setpoint, and Min Open Time settings based
on facility vacuum system design. These settings should be adjusted to provide
sufficient time for the mitigation process to affect the oxygen levels and avoid an
O2 alarm situation. The factory default settings have been evaluated under test and
should be acceptable for use in most facilities.
15.0
20.0
10.0
19.8