3M FREEDOM 5000 User manual

087-0020 REVE
WARNING
READ AND FOLLOW THE ENTIRE CONTENT OF THIS MANUAL PRIOR TO
USE.FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH.
FREEDOM 5000
Universal Analog Toxic Gas Detector Instruction Manual

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©2018Scott Safety,SCOTT, the SCOTT SAFETY Logo, Scott Health andSafety,
Protégé, Scout, Freedom, Masterdock, are registered and/or unregistered marks
of Scott Technologies, Inc. or its affiliates.
All rights reserved. No part ofthis documentation may be reproduced in any form or by
any means or used to make any derivative work (such as translation, transformation, or
adaptation) without written permission from Scott Safety.
Scott Safety reserves the right to revise this documentation and to make changes in
content from time to time without obligation on the part ofScott Safety to provide
notification of such revision or change.
Scott Safety provides this documentation without warranty, term, or condition of any kind,
either implied or expressed, including, but not limited to, the implied warranties, terms or
conditions ofmerchantability, satisfactory quality, and fitness for a particular purpose.
Scott Safety may make improvements or changes in the product(s) described in this
documentation at any time.
While every effort has been made to ensure accuracy in this guide, no responsibility can
be accepted for errors or omissions. This publication is not intended to form the basis ofa
contract, and the company reserves the right to amend the design, content, and
specifications ofthe detector without notice.
Scott Safety, 4320 Goldmine Road, Monroe, NC 28110, Telephone [phone], FAX
704-291-8330, E-mail [e-mail], Web www.scottsafety.com
Microsoft, Windows, Windows 2000, Windows Me, Windows XP, Windows NT, Windows
Vista, Windows 7, Internet Explorer and MS-DOS are either trademarks or registered
trademarks ofMicrosoft Corporation in the United States and other countries. Solaris and
JAVA are either trademarks or registered trademarks ofSun Microsystems, Inc. All other
products or service names are the property oftheir respective owners.
The international transport ofthis device is regulated under United States export
regulations and may be regulated by the import regulations of other countries.
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Table of Contents
Important Notices................................................................................................. 7
Warnings, Cautions, and Notes............................................................................ 8
General Warnings and Cautions .......................................................................... 9
Warranty............................................................................................................. 10
Contacting Scott Safety...................................................................................... 10
Approvals........................................................................................................... 12
Acronyms Quick Reference................................................................................ 13
Introduction ........................................................................................................ 14
Unpacking.......................................................................................................... 14
Overview of Sensor Operation ........................................................................... 16
Gas Specificity.................................................................................................... 17
Sensor Accuracy................................................................................................ 17
Typical Power Consumption............................................................................... 24
1/4 Turn Twist and Lock Accessories................................................................. 30
Alarm and Loop – Power Inhibit......................................................................... 31
Setting Inhibit Loop Current................................................................................ 31
System Maintenance.......................................................................................... 41
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List of Figures
Figure 1. Freedom 5000 with Integral Sensor.................................................................15
Figure 2 Sensor Operation..............................................................................................16
Figure 3 Interface............................................................................................................20
Figure 4 Inside View........................................................................................................22
Figure 5 Dimensional Drawing (with optional wall mount bracket)..................................23
Figure 6 L Mounting Bracket...........................................................................................25
Figure 7 Wiring & Testing................................................................................................26
Figure 8 Installation of E-Pad, GasPlus Sensor and Endcap..........................................27
Figure 9 E-Pad Separate & Installed in Endcap..............................................................28
Figure 10 Remote Sensor and Flat Duct Mount..............................................................29
Figure 11 Calibration Adaptor .........................................................................................30
Figure 12 Remote Duct Adaptor......................................................................................30
Figure 13 Direct Duct Mount Adaptor..............................................................................30
Figure 14 Inhibit Mode.....................................................................................................31
Figure 15 Setting Inhibit ..................................................................................................32
Figure 16 Zero Calibration...............................................................................................34
Figure 17 With SST Option .............................................................................................39
Figure 18 Sensor Self Test Generator.............................................................................40
Figure 19 E-Pad & Sensor ..............................................................................................41
Figure 20 096-2002.........................................................................................................43
Figure 21 Supply Voltage – CD.......................................................................................57
Figure 22 I. S. Barrier Wiring Diagram ............................................................................60
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List of Tables
Table 1 Acronym Quick Reference List...........................................................................13
Table 2. Conventional Sensors Part List (Not Rock-Solid)............................................47
Table 3. Rock Solid Sensor Part List ............................................................................49
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Record of Revisions
Revision Description
D
Updated document format, figures, periodicity ofroutine maintenance, and Sensor Self Test Description.
Revised Sensor Life section;revised Span Calibration Procedure section; added revision table, list of
figures, list of tables; removed Sensor Life form Specifications section;added and removed sensors form
partlist to update to reflect current sensor offerings;removed all references to TYCO; added 3M logo;
updated service center contact information.
Freedom 5000 Universal Analog Toxic Gas Detector
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ERemoved one remaining reference to TYCO.

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Safety and General Information
WARNING
ALL INDIVIDUALS WHO HAVE OR WILL HAVE RESPONSIBILITY FOR USING OR TESTING THIS PRODUCT MUST
READ AND UNDERSTAND THE CONTENTS OF THIS MANUAL.THE PRODUCT WILL PERFORM AS DESIGNED
ONLY IF USED AND TESTED IN ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS.FAILURE TO
FOLLOW MANUFACTURER’S INSTRUCTIONS WILL RENDER THE WARRANTY AND APPROVALS NULL AND
VOID.FAILURE TO FOLLOW THESE INSTRUCTIONS MAY ALSO RESULT IN SERIOUS INJURY OR DEATH.
Important Notices
Scott Safety can take no responsibility for use of its equipment if it is not used in accordance with
the instructions. If further operational or maintenance details are required but not provided in this
manual, contact Scott Safety or their agent. Scott Safety shall not be liable for any incidental or
consequential damages in connection with any modifications, errors or omissions in this manual.
While every effort has been made to ensure accuracy in this owner’s manual, no responsibility can
be accepted for errors or omissions. Additionally, industry standards, codes, and legislation are
subject to change. This publication is not intended to form the basis of a contract, and the
company reserves the right to amend the design, content, and specifications of the detector
without notice.
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Warnings, Cautions, and Notes
Throughout this document, warnings, cautions, and notes have been
interspersed to draw attention to potentially unsafe, hazardous, or unique
situations that require user attention. Each warning, caution, or note is labeled.
WARNING -INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH,IF NOT AVOIDED,COULD
RESULT IN DEATH OR SERIOUS INJURY.
CAUTION -INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH,IF NOT AVOIDED,MAY RESULT
IN MINOR OR MODERATE INJURY.IT MAY ALSO BE USED TO ALERT AGAINST UNSAFE PRACTICES.
NOTE -HIGHLIGHTS VARIOUS INSTANCES WHERE AN ATTENTION TO DETAIL IS CRITICAL TO PRODUCT
PERFORMANCE.
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General Warnings and Cautions
The following list of warnings and cautions pertain to the general use and care of
the Freedom 5000.
Failure to follow these warnings and cautions may result in death, injury, or poor
equipment performance.
WARNINGS
THIS EQUIPMENT MUST BE OPERATED AND SERVICED BY QUALIFIED PERSONNEL ONLY.READ AND
UNDERSTAND INSTRUCTION MANUAL COMPLETELY BEFORE OPERATING OR SERVICING.
VERIFY THE COVER,INTERNAL PCB’S AND FIELD WIRING ARE SECURELY IN PLACE BEFORE APPLYING POWER
AND OPERATION.
DO NOT EXPOSE THE FREEDOM 5000 TO ELECTRICAL SHOCK OR CONTINUOUS SEVERE MECHANICAL
SHOCK.
DO NOT USE THE FREEDOM 5000 IF ITS ENCLOSURE IS DAMAGED,CRACKED,OR HAS MISSING
COMPONENTS.
PROTECT THE FREEDOM 5000 FROM DRIPPING LIQUIDS AND HIGH POWER SPRAYS.
CAUTIONS
FREEDOM 5000 WILL NOT OPERATE WITHOUT POWER APPLIED.
USE ONLY A SENSOR ASSEMBLY COMPATIBLE WITH THE FREEDOM 5000 AND APPROVED BY SCOTT
SAFETY.
PERIODICALLY TEST FOR CORRECT OPERATION OF THE SYSTEM’S ALARM EVENTS BY EXPOSING THE
MONITOR TO A TARGETED GAS CONCENTRATION ABOVE THE HIGH ALARM SET POINT.
CALIBRATE WITH KNOWN TARGET GAS AT START-UP AND CHECK ON A REGULAR SCHEDULE.
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Freedom 5000 Universal Analog Toxic Gas Detector
Instruction Manual
Warranty Statement
Scott Safety (SCOTT) warrants the FREEDOM 5000 UNIVERSAL ANALOG TOXIC GAS
MONITORS (also referred to as THE PRODUCTS) to be free from defects in workmanship
and materials for a period of two (2) years from the date of original manufacture by SCOTT.
This warranty applies to all components of THE PRODUCTS supplied at the time of original
sale of THE PRODUCTS, EXCEPT pump and consumable filters. SCOTT warrants pump
supplied with THE PRODUCTS to be free from defects in workmanship and materials for one
(1) year from the date of original manufacture by SCOTT.
SCOTT's obligation under this warranty is limited to replacing or repairing (at SCOTT's option)
THE PRODUCTS or components shown to be defective in either workmanship or materials.
Only personnel of SCOTT or, when directed by SCOTT, authorized SCOTT agents are
permitted to perform warranty obligations. This warranty does not apply to defects or damage
caused by any repairs of or alterations to THE PRODUCTS made by owner or any third party
unless expressly permitted by SCOTT product manuals or by written authorization from
SCOTT.
To obtain performance under this warranty, and as a condition precedent to any duty of
SCOTT, the purchaser must return such products to SCOTT, a SCOTT authorized distributor
or a SCOTT authorized service center. See Scott Repairs on page 11.
This warranty does not apply to any malfunction of or damage to THE PRODUCTS resulting
from accident, alteration, misuse, or abuse.
THIS WARRANTY IS MADE IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR
IMPLIEDINCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. IN ADDITION, SCOTT EXPRESSLY DISCLAIMS ANY LIABILITY
FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES IN ANY WAY CONNECTED
WITH THE SALE OR USE OF SCOTT PRODUCTS, AND NO OTHER FIRM OR PERSON IS
AUTHORIZED TO ASSUME ANY SUCH LIABILITY.

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Freedom 5000 Universal Analog Toxic Gas Detector
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Scott Repairs
Congratulations on your purchase of a Scott Safety product. It is designed to provide you
with reliable trouble-free service.
Contact us, if you have technical questions, need support, or if you need to return a
product.
When returning a product, contact Technical Support to obtain a Return Material
Authorization (RMA) number prior to shipping for service repairs.
Americas
3M Gas and Flame Detection Service Center
4055 Technology Forest Blvd
Suite 100
The Woodlands, TX 77381
Email: [email protected]
Phone: [phone]
Europe, Middle East and Africa
3M/Oldham SAS - Depot Repair
ZI EST - Rue Orfila - CS 20417
62027 Arras cedex
France
Email : [e-mail]
Phone : [phone]
Asia and Pacific
3M Asia Pacific Pte Ltd
Attn: Alfeo P. Sinogaya
Portable & Fixed Gas Flame Detection
Scott Safety | Detcon | Oldham | Simtronics | GMI
3M Personal Safety Division, Safety & Graphics Business Group
1 Yishun Avenue 7 | Singapore 768923
Email: [e-mail] & [email protected]
Mobile: [phone]

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Approvals
The Freedom 5000 has been tested and complies with the following directives,
standards, or standardized documents:
North America
CLASS I DIVISION 2 GROUPS A, B, C, D T6; NEMA 4X
INTERNATIONAL
Ex nL IIC T6
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Acronyms Quick Reference
Throughout the duration of this manual, several acronyms are used. Provided in
Table 1 is a quick reference chart to quickly identify any acronym that may be
unfamiliar to users.
Table 1 Acronym Quick Reference List
Acronym
Definition
AC
Alternating Current
AWG
American Wire Gauge
C
Common or the pole
°C
Degrees Celsius
DC
Direct Current
EM
Electromagnetic
EMI
Electromagnetic Interference
°F
Degrees Fahrenheit
ID
Inside Diameter
I/O
Input/Output
LCD
Liquid Crystal Display
LED
Light Emitting Diode
mA
Milliamps
NEC
National Electrical Code
NIST
National Institute of Standards and Technology
NPT
National Pipe Thread
OD
Outside Diameter
PCB
Printed Circuit Board
PCBA
Printed Circuit Board Assembly
SST
Sensor Self Test
VAC
Volts Alternating Current
VDC
Volts Direct Current
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Introduction
Unpacking
All Freedom™ 5000 items are individually packaged. Carefully, open
each box and remove the items. Each package comes with a magnet,
operations manual as well as the transmitter itself. If a sensor was
purchased with the transmitter it will be in a separate container (typically
blue plastic) shipped with the Freedom™ 5000. Accessories such as
calibration adapter, rain shield, duct mount adapter, and flow cell will be
inside the 5000 shipping container.
DO NOT DISCARD THE ELASTOMERIC PAD LOCATED INSIDE THE
SENSOR HOUSING AS THIS PIECE IS REQUIRED FOR OPERATION
Identify all items with your Order and Packing list.
Examine for external damage. If any is found, or if any item is missing,
notify Scott Safety using the contact information provided herein.
Freedom™ 5000
The Freedom™ 5000 Instrument is designed to detect the presence of a
specific toxic gas so that human life may be protected from the potential
hazardous conditions created by toxic gas environments.
Each Freedom™ 5000 complete instrument consists of:
AGasPlus Sensor – Providing toxic gas, oxygen deficiency, or
hydrogen detection.
A Series 5000 Transmitter –Providing a Digital display of the
specific Toxic Gas detected in PPM (Parts per Million), PPB
(Parts per Billion), or % v/v (Percent by Volume) depending on the
specific application and sensor used.
A Magnet & Operations Manual –The magnet is used to interface
with the magnetic reed switches located on the front panel of the
5000.
General Description
The Freedom™ 5000 toxic gas transmitter is a universal loop – powered
microprocessor controlled 4–20 mA device, which allows any of the
GasPlus toxic gas “smart” sensors (excluding the Model 88 combustible
sensor) to be used for the detection of a specific target gas. When
properly installed, non-intrusive operation of the transmitter and an
intrinsically safe design, when used with an approved barrier, permit the
Series 5000 to be operated and calibrated within potentially explosive
environments without having to declassify such areas.
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Figure 1. Freedom 5000 with Integral Sensor
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THE SCOTT SAFETY
GAS SENSOR
Overview of Sensor Operation
Scott Safety manufactures two types of electrochemical gas
sensors. These being the traditional GasPlus sensor and
the Rock SolidGasPlus sensor. Both sensor types
provide reliable gas detection but the Rock Solidsensor
provides superior zero stability, faster response time, and
higher specificity to the target gas. Both of these specialized
electrochemical gas sensors detect target gases for which
they were designed through a series of electrochemical
reactions. Gas passes through a gas permeable membrane
where it then contacts an electrolyte – saturated membrane.
The gas is then oxidized or reduced (depending on the gas)
at the sensing electrode, and the reaction is balanced at the
counter electrode. In most traditional sensors, a third
electrode acts as a reference to maintain a fixed potential at
the sensing electrode. As gas concentration increases, a
corresponding increase in current output occurs. The current
output is measured and amplified, then converted by the
Series 5000 transmitter to a signal on the 4–20 mA loops
where it is used to read gas concentration.
The Sensor and Battery
Figure 2 Sensor Operation Each GasPlus ‘smart’ sensor contains circuitry with an
EEPROM and lithium battery. The EEPROM retains specific
sensor data including gas measuring type, range, alarm set-
points, and sensor calibration factor. When connected to the
transmitter, the sensor data is up loaded to the transmitter.
Upon disconnection of the GasPlus sensor from transmitter
assembly, the bias potential (required by electrochemical
sensors) across the sensor’s electrodes will be maintained
via the integral battery. The battery is capable of providing
up to a total of 9 months of “off - line” power (because the
battery is not rechargeable, “off - line” time is cumulative),
providing proper storage procedures are followed. Store the
sensor in a cool dry place (such as a refrigerator). Do not
store the sensor in excessively hot, dry or humid
environments. Should the sensor be kept off-line for a
cumulative period of time exceeding 9 months, the sensor
will continue to operate! Sensor battery failure does not
mean the sensor has failed and will not operate, only that it
will require a 4-8 hour warm-up time upon installation. On
the sensor has become stable, calibration may occur as
normal.
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Gas Specificity
Each gas sensor is engineered and designed to be gas specific;
however, the very nature of electrochemical gas detection is such that
the presence of certain gases may act as an interferent to certain
sensors. Each sensor can have its own interferent(s), causing the sensor
to respond electrochemically. Scott Safety has tested and documented
some of the known interferents. These are listed in an Addendum
located in the back of the manual.
Sensor Accuracy
The accuracy of a toxic gas sensing system is limited by the accuracy of
999the standard used to calibrate the system. For many toxic gases,
obtaining a high accuracy standard that is suitable for field calibration
use may be difficult (about the best accuracy of gas concentration
achievable is 5%, using a permeation system with good temperature
control). For this reason, no fixed accuracy statement is possible. The
accuracy of the GasPlus sensor cannot be better than the accuracy of
the calibration gas. The best accuracy to be expected, assuming a
perfect standard, is limited by the repeatability which is ±2% of span (full
scale) and linearity which is ±2% of span.
Sensor Response Times
Electrochemical Gas sensors are optimized to give the fastest possible
response time while maintaining excellent zero stability and minimum
drift (approximate sensor response times are available from Scott
Safety). If response time appears to be slow, refer to the “Weekly
Operational Checks” within the System Operation section.
Sensor Life
Because applications are of such a variable nature, only experience in
the given application or plant condition will determine the best
replacement frequency. GasPlus sensors will generally provide a
minimum of 12 months of service in ambient air gas detection
applications. Extremes of humidity and temperature, and exposure to
dirty atmospheres containing particulate matter or oily vapors will
decrease sensor life. In addition, extended exposure to target or other
active gases may shorten sensor life. In applications where only trace
levels of target gas exist, except under leak conditions, sensor life will
most likely be over 18 months.
Scott Safety recommends that you calibrate sensors periodically and
check the calibration factor of the sensor after each calibration to make
sure that the sensor will last until the next calibration cycle. Sensors with
a calibration factor of 250 or less are approaching the end of their useful
life and should be replaced.
.
Sensor battery failure
does not render the
sensor useless but it will
require a 4-8 hour warm-
up time upon installation.
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Environmental Influences to the Scott Safety Sensor
Although the Freedom™ 5000 transmitter is designed to operate at
temperatures from -40°to 140°F (-40°to 60°C), the operating
temperature is dictated by which gas sensor has been installed. The
GasPlus Sensor Operating Parameters Addenda (see back of
manual) show the operating temperature ranges for each sensor type.
Extreme hot temperatures and exposure to dirty atmospheres containing
particulate matter or oily vapors can affect sensor response and
decrease sensor life. Extreme cold temperatures, if below the rated
value of the sensor, have the potential of freezing the sensor electrolyte
and thus damaging the sensor permanently.
Humidity (%RH) has the potential to affect the performance of
electrochemical sensors. Gas sensors are designed to provide stable
output over a range of humidity conditions. Intermittent exposure to
relative humidity conditions from 10% to 99% non-condensing RH will
not affect operation of most sensors. Scott Safety typically provides a
low humidity version (electrolyte balanced for 50% R.H. equilibrium) and
a high humidity version (electrolyte balanced for 75% R.H. equilibrium)
sensor.
Most indoor HVAC controlled environments will use a low humidity
sensor while most outdoor applications will use a high humidity version.
In those applications where there is doubt as to which sensor should be
used it is advisable to use the high humidity version. Contact your Scott
Safety representative for assistance in selecting the proper type for your
application.
Extremely dry air has the potential to adversely affect the operation of
electrochemical sensors. At a R.H. continuously below 25%, sensors can
exhibit an early loss of sensitivity after a few days to a week of operation.
This is caused by a slow loss of water from the internal sensor
electrolyte. Suspending the sensor over a jar of water for 24 hours will
usually restore sensitivity.
Extremely humid or wet conditions can affect these sensors which
rely on an unobstructed gas diffusion path into the sensor. If the gas
stream or ambient air allows humidity to condense on the sensor, the
water on the membrane will cause loss of sensitivity, or slow response,
or both. Once the sensor has had a chance to dry out, normal operation
should be restored. If the source of moisture is a result of water spray or
rain, a rain shield may be installed on the sensor module to protect the
sensing membrane. Keep in mind that some gases may chemically react
with water vapor and be converted to other species (e.g., ammonia
hydrolyzes to form ammonium hydroxide when exposed to water vapor).
In addition, other gases such as hydrogen fluoride are very reactive and
may be absorbed on the inner surfaces of flow tubing before reaching
the sensor during calibration. Such questions should be referred to
chemists or industrial hygienists.
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Sensor Oxygen Requirements
Scott Safety “traditional” (not Rock Solid) gas sensors require a
minimum of 5% oxygen for continuous operation under ambient
conditions (except the Model 80 Oxygen sensor). Sensors operating
in conditions of less than 5% oxygen will provide erroneous or unstable
concentration data.
Beyond the 5% minimum oxygen concentration requirement, all
“traditional” Hydride sensors (Arsine, Diborane, Germane, Hydrogen
Selenide, Phosphine, Silane) require constant oxygen concentration
when performing sensor calibration. Fluctuating oxygen concentration
during calibration will result in erroneous concentration readings during
system operation.
Note: The above does not apply to the Scott Safety Rock Solid sensors.
Sensor Intrinsic Safety
An Intrinsically safe circuit is simply defined as” ...an electrical circuit
which does not contain, or store, enough energy to cause ignition of a
given explosive atmosphere”. GasPlus sensors are designed as
intrinsically safe and, with the transmitter incorporating a remote safety
barrier, can be removed from the transmitter sensor housing within
explosive environments. These include Division 1 or Zone 0 areas.
Note: Barrier must be installed in a non-hazardous location. Freedom™
5000 expects to receive third party certification for hazardous protection
by July of 2001.
Sensor Handling and Disposal
Do not attempt to disassemble the sensor in any way. The GasPlus
sensor contains various chemicals/electrolytes. Skin and eye contact
should be avoided and should be considered hazardous.
Touching the membrane should be avoided as this can cause
damage to the sensor.
The GasPlus sensor can be disposed of as ordinary trash with no special
precautions. Incineration in a municipal/commercial incinerator poses no
hazard.
SPECIAL NOTE! The Rock Solid hydride sensor contains a strong acid and
should be handled with caution if electrolyte is leaking.
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Series 5000 Transmitter
General
The General Purpose loop powered universal transmitter measures the
sensor output current, conditions it, and converts it to a 4 – 20 mA
current output. The Freedom™ 5000 requires a minimum of 3mA to
operate and thus this is the lowest output the transmitter can output. The
only exception is a failure which could cause it to go to 0mA.
This output is proportional to the toxic gas monitored in PPM, PPB, or
%v/v (percent by volume) for the type and range of a specific GasPlus
sensor.
Please note that ±3% of full scale is “clipped” to 4mA/zero reading.
This is done to eliminate low level “flicker”.
The sensor type and range is automatically recognized and displayed
when the instrument is powered up.
The 4 – 20 mA loop can be customer wired to any current input device
(e.g. Alarm, PLC, DCS systems etc.).
Specific
The Freedom™ 5000 unique electronic circuitry design provides a high
degree of RFI immunity.
See Figure 3 for enclosure dimensions.
A LCD is provided for the toxic gas concentration and the units of
measure; PPM, PPB, or %. Also furnished are self – diagnostic alarms
Figure 3 Interface
and/or status indication flags. These are:
Flags: OR – Over Range
SST –Sensor Self Test is in operation
INH – Inhibit: Transmitter output is set at the inhibit value.
SEN –Sensor CAL factor is below 150.
Zero & Escape magnetic
switch. Use to zero
calibrate and escape from
programming mode.
Up & Down magnetic switches.
Increase or decrease values &
used to enter Inhibit & optional
SST menu.
Span & Enter
magnetic switch.
Use to span
calibrate and
accept input
values.
Diagnostic bar
Freedom 5000 Universal Analog Toxic Gas Detector
Instruction Manual