Sperian PHD6 User manual

1
Gas Detector
Biosystems
PHD6
Reference
Manual
Sperian Instrumentation
651 South Main Street
Middletown, CT 06457
800 711-6776 860 344-1079
Fax 860 344 – 1068
12MAR2009
Part Number 13-322
Version 2.01
http://www.biosystems.com

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BIOSYSTEMS PHD6 PERSONAL PORTABLE GAS DETECTORS HAVE
BEEN DESIGNED FOR THE DETECTION AND MEASUREMENT OF
POTENTIALLY HAZARDOUS ATMOSPHERIC CONDITIONS
IN ORDER TO ASSURE THAT THE USER IS PROPERLY WARNED OF
POTENTIALLY DANGEROUS ATMOSPHERIC CONDITIONS, IT IS
ESSENTIAL THAT THE INSTRUCTIONS IN THIS REFERENCE MANUAL
BE READ, FULLY UNDERSTOOD, AND FOLLOWED.
Biosystems PHD6
Reference Manual
Part Number 13-322
Version 2.01
Copyright 2009
by
Sperian Protection Instrumentation, LLC
Middletown, Connecticut 06457
All rights reserved.
No page or part of this operation manual may be reproduced in any form without
written permission of the copyright owner shown above.
Sperian reserves the right to correct typographical errors.
Specifications are subject to change without notice.

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Table of Contents
CERTIFICATION INFORMATION 4
OPERATING TEMPERATURE AND HUMIDITY LIMITS 4
SIGNAL WORDS 4
WARNINGS AND CAUTIONS 4
1. DESCRIPTION 6
1.1 Methods of sampling 6
1.2 Multi-sensor capability 6
1.3 Calibration 6
1.4 Alarm logic 6
1.4.1 Atmospheric hazard alarms 7
1.4.2 Low battery alarms 7
1.4.3 Sensor over range alarms 7
1.4.4 PID lamp out alarm 7
1.4.5 LEL response failure due to lack of O2alarm 7
1.4.6 Security beep/flash 7
1.4.7 Latching alarms 7
1.4.8 Fault detection 8
1.5 Other electronic safeguards 8
1.6 Sensors 8
1.7 Optional sample draw pump 8
1.7.1 Special precautions when using the PHD6 pump 8
1.8 Data storage 8
1.8.1 Black box data recorder 9
1.8.2 Event logger 9
1.9 PHD6 design components 9
1.10 PHD6 standard accessories 9
1.10.1 Alkaline PHD6 detectors 10
1.10.2 Li-Ion PHD6 detectors 10
1.11 PHD6 kits 10
1.11.1 PHD6 Confined Space Kits 10
1.11.2 PHD6 Value Packs 10
2. BASIC OPERATIONS 10
2.1 Turning the PHD6 On 10
2.1.1 Start up with pump 11
2.1.2 Start up with PID or IR sensor 11
2.2 Operating Logic 11
2.2.1 Status Bar 11
Battery Status Icon 11
Heartbeat Symbol 12
Pump Status Icon 12
Calibration and Bump Due Warnings 12
Time 12
2.2.2 Screen Flip 12
2.3 Turning the PHD6 Off 12
2.4 Atmospheric Hazard Alarms 12
2.4.1 O2 Alarms 12
2.4.2 Combustible Gas Alarms 12
2.4.3 Toxic and VOC sensor alarms 12
2.4.4 Alarm Descriptions 12
Warning Alarms 12
Danger Alarms 13
STEL Alarms 13
TWA Alarms 13
2.5 Other Alarms 13
2.5.1 Missing Sensor Alarms 13
2.5.2 Sensor Overrange alarm 13
2.5.3 PID Lamp Out Alarm 13
2.5.4 O2Too Low for LEL Alarms 13
2.5.5 Low Battery Alarms 13
2.5.6 Calibration Due Warning 14
2.5.7 Out of Temperature Range 14

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2.6 PC Connection via Infrared Port 14
2.7 PID sensor reactivity ratios 14
2.7.1 Displayed VOC 14
2.7.2 Specified VOC Calibration Gas 15
2.8 Special Instructions for NDIR sensors 15
2.8.1 Special Calibration Requirement for NDIR CO2(Carbon Dioxide) Sensor 15
2.8.3 Hydrogen Warning for IR CH4Methane Sensor 15
3. SAMPLING 15
3.1 Manual sample draw kit 15
3.1.1 Manual sample draw kit usage 15
3.2 Motorized sample draw pump 16
3.2.1 Starting the motorized sample pump 16
3.2.2 Turning off the pump 17
3.2.3 Pump low flow alarm 17
3.3 Sample draw probe 17
4. CALIBRATION 17
4.1 Functional (Bump) testing 18
4.2 Fresh Air/Zero Calibration 18
4.2.1 Fresh air calibration failure 19
4.2.2 Forced fresh air calibration 19
4.2.3 Fresh air calibration in a contaminated atmosphere 19
4.3 Gas Calibration 19
4.3.1 Gas calibration failure: All sensors except oxygen 20
4.3.2 Gas calibration failure: Oxygen sensors 20
4.4 Special Calibration Instruction for NDIR CO2sensor 21
4.4.1 CO2Sensor True Zero 21
4.5 Special Calibration Instructions for NDIR-CH4Sensor 21
5. MENU OPTIONS 21
5.1 Basic Menu 21
5.1.1 Entering the Basic Menu 21
5.2 Main Menu 21
5.2.1 Entering the Main Menu 22
5.2.2 Using the submenus. 22
5.2.3 Alarms Menu 22
5.2.4 Calibration Menu 22
5.2.5 Configuration Menu 23
5.2.6 Screen Menu 24
5.2.7 Information Menu 24
5.2.8 Datalogger Menu 24
6. MAINTENANCE 24
6.1 Batteries 24
6.2 Replacing alkaline batteries 24
6.3 Maintaining Li-Ion battery packs 25
6.3.1 Storage guidelines for the Li-Ion battery 25
6.3.2 Charging guidelines for Li-Ion battery 25
6.3.3 Charging procedure for Li-Ion battery 25
6.3.4 Charging with the pump attached 25
6.3.5 Battery troubleshooting 25
6.4 Sensors 25
6.4.1 Sensor replacement 25
6.4.2 Care and maintenance of PID sensors 26
6.4.2.1 Troubleshooting the PID 26
6.4.2.2 Cleaning and replacing PID components 26
6.5 Sample probe assembly 26
6.5.1 Changing sample probe filters 27
6.5.2 Changing sample probe tubes (wands) 27
6.6 PHD6 Pump Maintenance 27
6.6.1 Replacing pump filters 27
APPENDICES 28
Appendix A Toxic gas measurement – Warning, Danger, STEL and TWA alarms 28
1. Warning and Danger Alarms 28
2. Time Weighted Average (TWA) 28
3. Short Term Exposure Limits (STEL) 28
Appendix B Calibration Frequency Recommendation 29

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Appendix C PHD6 Sensor Information 30
Appendix D Electrochemical Toxic Sensor Cross-Sensitivity 30
** SENSOR MANUFACTURER RATES CROSS SENSITIVITY FOR HCN SENSOR TO H2S AS FOLLOWS FOR 20
PPM EXPOSURE:“SHORT GAS EXPOSURE IN MINUTE RANGE;AFTER FILTER SATURATION:CA.40 PPM
READING”.SPERIAN INSTRUMENTATION WARRANTY GAS DETECTION PRODUCTS 30
SPERIAN INSTRUMENTATION WARRANTY GAS DETECTION PRODUCTS 31
Certification Information
The PHD6 carries the following certifications (as of 6/1/2008):
SGS USTC Class I Division 1 Groups A,B,C,D Temp Code T3C (Approved to UL 913)
SGS USTC Class II Division 1 Groups E,F,G (Approved to UL 913)
SGS USTC Class III (Approved to UL 913)
CSA Class I, Division 1 Groups A,B,C,D Temp Code T3C
ONLY THE COMBUSTIBLE GAS DETECTION PORTION OF THIS INSTRUMENT HAS BEEN ASSESSED
FOR PERFORMANCE.
ATEX: Ex d ia IIC 170 °C (T3)
IECEx: Ex d ia IIC 170 °C (T3)
Operating Temperature and Humidity Limits
The Biosystems PHD6’s operating temperature range is printed on the
label on the back of the instrument. Use of Sperian Gas Detectors outside of the
instrument’s specified operating temperature range may result in inaccurate and potentially
dangerous readings.
Signal Words
The following signal words, as defined by ANSI Z535.4-1998, are used in the PHD6
Reference Manual.
indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
indicates a potentially hazardous situation, which if not avoided, may
result in moderate or minor injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous
situation which, if not avoided, may result in property damage.
Warnings and Cautions
1. The PHD6 personal, portable gas detector has been designed for
the detection of dangerous atmospheric conditions. An alarm condition indicates the
presence of a potentially life-threatening hazard and should be taken very seriously.
Failure to immediately leave the area may result in serious injury or death.
2. In the event of an alarm condition it is important to follow
established procedures. The safest course of action is to immediately leave the affected
area, and to return only after further testing determines that the area is once again safe
for entry. Failure to immediately leave the area may result in serious injury or death.
3. The PHD6 must be located in a non-hazardous location whenever
alkaline batteries are removed from the alkaline battery pack. Removal of the alkaline
batteries from the battery pack in a hazardous area may impair intrinsic safety.
4. Use only Duracell MN1500 or Ultra MX1500, Eveready Energizer
E91-LR6, Eveready EN91 batteries in the alkaline battery pack. Substitution of batteries
may impair intrinsic safety.
5. To reduce the risk of explosion, do not mix old or used batteries
with new batteries and do not mix batteries from different manufacturers.
6. Do not charge the PHD6 with any charger other than the
appropriate Sperian PHD6 charger. Standard versions of the PHD6 must be charged

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with the UL/CSA-approved charger, which is Sperian part number 54-49-103-1.
European versions of the PHD6 must be charged with the ATEX-approved charger,
which is Sperian part number 54-49-103-5.
7. The PHD6 must be located in a non-hazardous location during the
charging cycle. Charging the PHD6 in a hazardous location may impair intrinsic safety.
8. PHD6 rechargeable battery packs are supplied with Panasonic
CGR18650D Lithium-Ion batteries. The Li-Ion batteries in the battery packs may not be
replaced by the user. The rechargeable pack must be obtained from Sperian and
replaced as a complete assembly to maintain intrinsic safety.
9. The accuracy of the PHD6 should be checked periodically with
known concentration calibration gas. Failure to check accuracy can lead to inaccurate
and potentially dangerous readings. (The Canadian Standards Association (CSA)
requires an accuracy check using known concentration calibration gas prior to each
day’s use.)
10. Fresh air/zero calibrations may only be performed in an
atmosphere that is known to contain 20.9% oxygen, 0.0% LEL and 0 PPM toxic gas.
11. The accuracy of the PHD6 should be checked immediately
following any known exposure to contaminants by testing with known concentration test
gas before further use. Failure to check accuracy can lead to inaccurate and potentially
dangerous readings.
12. A sensor that cannot be calibrated or is found to be out of
tolerance should be replaced immediately. An instrument that fails calibration may not
be used until testing with known concentration test gas determines that accuracy has
been restored, and the instrument is once again fit for use.
13. Do not reset the calibration gas concentration unless you are using
a calibration gas concentration that differs from the one that is normally supplied by
Sperian for use in calibrating the PHD6.
Customers are strongly urged to use only Sperian calibration materials when calibrating
the PHD6. Use of non-standard calibration gas and/or calibration kit components can lead
to dangerously inaccurate readings and may void the standard Sperian warranty.
14. Use of non-standard calibration gas and/or calibration kit
components when calibrating the PHD6 can lead to inaccurate and potentially
dangerous readings and may void the standard Sperian warranty.
Sperian offers calibration kits and long-lasting cylinders of test gas specifically
developed for easy PHD6 calibration. Customers are strongly urged to use only Sperian
calibration materials when calibrating the PHD6.
15. Substitution of components may impair intrinsic safety.
16. For safety reasons this equipment must be operated and serviced
by qualified personnel only. Read and understand this reference manual before
operating or servicing the PHD6.
17. A rapid up-scale reading followed by a declining or erratic reading
may indicate a hazardous combustible gas concentration that exceeds the PHD6’s zero
to 100 percent LEL detection range.
18. The PHD6 is not designed for use in oxygen enriched
atmospheres.
19. Do not use the PHD6 pump for prolonged periods in an
atmosphere containing a concentration of solvent or fuel that may be greater than 50%
LEL.
20. Do not unplug the NDIR-CH4or NDIR-CO2sensors in an explosive
atmosphere. Unplugging IR sensors in an explosive atmosphere may impair intrinsic
safety.

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1. Description
The Biosystems PHD6 is a multi-sensor gas
detector that can be configured to meet a wide
variety of user requirements. This chapter
provides an overview of many of the features of
the PHD6. More detailed descriptions of the
specific features of the PHD6 are contained in the
subsequent chapters of this manual.
1.1 Methods of sampling
The PHD6 may be used in either diffusion or
sample-draw mode. In either mode, the gas
sample must reach the sensors for the instrument
to register a gas reading. The sensors are
located at the lower front of the instrument.
The sensor ports must be
kept free of obstruction. Blocked sensor
ports can lead to inaccurate and potentially
dangerous readings.
In diffusion mode, the atmosphere being
measured reaches the sensors by diffusing
through the sensor ports at the front of the
instrument. Normal air movements are enough to
carry the sample to the sensors. The sensors
react quickly to changes in the concentrations of
the gases being measured. Diffusion-style
operation monitors only the atmosphere that
immediately surrounds the detector.
The PHD6 can also be used to sample remote
locations with its hand-aspirated sample-draw kit
or with its motorized, continuous sample draw
pump. During remote sampling, the gas sample
is drawn into the sensor compartment through the
probe assembly and a length of tubing. Remote
sampling operations only monitor the atmosphere
at the end of the sample draw probe.
Use of the hand-aspirated sample draw kits is
covered in section 3.1.
Use of the motorized sample draw pump is
covered in section 3.2.
A detailed description of the PHD6 probe
assembly is given in section 6.5
1.2 Multi-sensor capability
The PHD6 can be configured to simultaneously
monitor oxygen, combustible gases and vapors,
volatile organic compounds (VOCs), and a wide
variety of toxic gases. All sensors are
replaceable in the field.
Note: The accuracy of the PHD6 must be
verified by calibration with known
concentration test gas whenever a change is
made to the sensors installed in the
instrument.
Calibration procedures are discussed in detail
in Chapter 4.
The PHD6 can utilize a variety of sensor types to
detect atmospheric contaminants including
electrochemical sensors, PID (Photo Ionization
Detector) sensors, NDIR (Non-Dispersive Infra-
Red Absorbance) sensors and catalytic hot-bead
LEL sensors.
Different measurement units are used depending
on the gas being measured.
Type of Hazard Measurement unit
Oxygen (O2) Percentage by
volume
Combustible gas
(LEL Sensor)
Percentage of lower
explosive limit
(%LEL) or %/Vol CH4
Hydrocarbon-specific
combustible gas
sensor
(NDIR – CH4)
Percentage of lower
explosive limit
(%LEL) or transitional
PPM - %/Vol CH4
Volatile Organic
Compounds (VOCs)
(PID Sensor)
Parts-per-million
(PPM) or tenths of a
part-per-million
(0.1PPM)
Toxic Gases (by
electrochemical
sensor or by NDIR –
CO2sensor)
Parts-per-million
(PPM) – some
sensors capable of
tenths of a part-per-
million (0.1PPM)
Table 1.2. PHD6 Units of Measurement.
1.3 Calibration
The PHD6 detector features fully automatic fresh
air and gas calibration.
The accuracy of the
PHD6 should be checked periodically with
known concentration calibration gas. Failure
to check accuracy can lead to inaccurate and
potentially dangerous readings. (The
Canadian Standards Association (CSA)
requires an accuracy check using known
concentration calibration gas prior to each
day’s use.)
Calibration procedures are discussed in detail
in Chapter 4.
Recommended calibration frequency is
discussed in Appendix B.
1.4 Alarm logic
PHD6 gas alarms can be adjusted manually
using the PHD6’s built in menu functions, with
BioTrak software via IrDA interface, or with the IQ
Database Manager Program through the PHD6

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IQ Express Dock. (See Chapter 6 for direct
menu programming instructions). Alarms may be
set anywhere within the nominal range of the
specific sensor. When an alarm set point is
exceeded a loud audible alarm sounds, and the
bright red LED alarm lights flash.
1.4.1 Atmospheric hazard alarms
PHD6 portable gas
detectors have been designed for the
detection of deficiencies of oxygen,
accumulations of flammable gases and
vapors, and accumulations of specific toxic
gases. An alarm condition indicating the
presence of one or more of these potentially
life-threatening hazards should be taken very
seriously. Failure to immediately leave the
area may result in serious injury or death.
In the event of an alarm
condition it is important to follow established
procedures. The safest course of action is to
immediately leave the affected area, and to
return only after further testing determines
that the area is once again safe for entry.
Failure to immediately leave the area may
result in serious injury or death.
A rapid up-scale reading
followed by a declining or erratic reading may
indicate a hazardous combustible gas
concentration that exceeds the PHD6’s zero
to 100 percent LEL detection range. Failure to
immediately leave the area may result in
serious injury or death.
The combustible gas alarms are activated when
the reading for combustible gases exceeds one
of the alarm setpoints. Combustible gas readings
are typically given in terms of percent of LEL
(Lower Explosive Limit), but may also be shown
in terms of percent-by-volume methane (CH4).
The PHD6 includes Warning and Danger alarms
for the both the LEL sensor and the NDIR-CH4
sensor.
Two oxygen alarm set points have been
provided; a low alarm for oxygen deficiency and a
high alarm for oxygen enrichment.
Up to four alarm set points are provided for the
PID sensor and for each toxic gas sensor:
Warning, Danger, STEL (Short Term Exposure
Limit) and TWA (Time Weighted Average).
Appendix A discusses Warning, Danger,
STEL and TWA alarms.
1.4.2 Low battery alarms
The PHD6 includes multi-staged alarms for both
the Li-Ion and alkaline battery packs to let the
user know that the battery is running low.
For detailed information concerning the low
battery alarms, see section 2.5.5.
Use only Duracell MN1500
or Ultra MX1500, Eveready Energizer E91-LR6,
Eveready EN91 batteries. Substitution of
batteries may impair intrinsic safety.
1.4.3 Sensor over range alarms
The PHD6 will go into alarm if a sensor is
exposed to a concentration of gas that exceeds
its established range. In the case of an LEL or
NDIR-CH4sensor reading that exceeds 100%
LEL, the sensor channel will be automatically
disabled by the instrument and the instrument will
remain in constant alarm until it is turned off,
brought to an area that is known to be safe, and
then turned back on. The display will show a
vertical arrow with two heads in place of the
sensor reading for any channel that has gone into
over range alarm.
See section 2.5.2 for further details.
In the event of an LEL
overrange alarm the PHD6 must be turned off,
brought to an area that is known to be safe
and then turned on again to reset the alarm.
1.4.4 PID lamp out alarm
The PHD6 monitors the status of the PID lamp to
ensure that it is functioning properly. Alarms are
generated if the PHD6 determines that the lamp
is out. See section 2.5.3 for further details
1.4.5 LEL response failure due to lack of O2
alarm
The PHD6 features automatic warning against
LEL sensor response failure due to lack of
oxygen. See section 2.5.4 for details.
1.4.6 Security beep/flash
The PHD6 includes a security beep function that
is designed to notify the user that the instrument
is powered up and running. Once enabled the
PHD6 will emit a short audible beep and give a
short flash on the LED at a user-defined interval.
The security beep/flash can be enabled manually
through the Main Menu (see chapter 5), with
BioTrak software or through the PHD6 IQ
Express Dock.
1.4.7 Latching alarms
The PHD6’s alarms are self-resetting unless the
alarm latch is enabled. With the PHD6’s alarm
latch enabled, the audible and visible alarms will
continue to sound after the atmospheric hazard
has cleared. To reset the alarms, simply press
the MODE button. If the alarm latch is disabled
and the alarm condition is no longer present, the
instrument will automatically return to normal
operation, and the visible and audible alarms
cease without further input from the user.
Latching alarms can be enabled manually
through the Main Menu (see chapter 5), with
BioTrak software or through the PHD6 IQ
Express Dock.

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1.4.8 Fault detection
PHD6 software includes a number of additional
alarms designed to ensure the proper operation
of the instrument. When the PHD6 detects that
an electronic fault or failure condition has
occurred, the proper audible and visible alarms
are activated and an explanatory message is
displayed.
Faults and other electronic safeguards are
discussed in detail in section 2.5.
The PHD6 is designed to
detect potentially life threatening atmospheric
conditions. Any alarm condition should be
taken seriously. The safest course of action
is to immediately leave the affected area, and
return only after further testing determines
that the area is once again safe for entry.
1.5 Other electronic safeguards
Several automatic programs prevent tampering
and misuse of the PHD6 by unauthorized
persons. Each time the detector is turned on, the
PHD6 automatically tests the LED alarm lights,
audible alarm, internal memory and pump status
(if so equipped). The battery is monitored
continuously for proper voltage. The PHD6 also
monitors the connection of sensors that are
currently installed. The detection of any
electronic faults causes the activation of the
audible and visible alarms and causes the display
of the appropriate explanatory message.
1.6 Sensors
The PHD6 can be configured to simultaneously
monitor oxygen, combustible gases and vapors,
volatile organic compounds (VOCs) and a
number of toxic gases. The sensor configuration
of the PHD6 may be specified at the time of
purchase, or changed in the field by appropriately
trained personnel.
The PHD6 must be calibrated following any
sensor replacement.
Replacement sensor part numbers and
sensor ranges are given in Appendix C.
A sensor that cannot be
calibrated or is found to be out of tolerance
must be replaced immediately. An instrument
that fails calibration may not be used until
testing with known concentration test gas
determines that accuracy has been restored,
and the instrument is once again fit for use.
Calibration procedures are discussed in detail
in Chapter 4.
1.6.1 Cross Sensitivity
Sensor cross-sensitivity figures are given in
Appendix D.
The CO channel in the Duo-Tox sensor in the
PHD6 may exhibit high levels of cross sensitivity
to organic vapors (VOCs). For best performance
in an atmosphere known to contain VOCs, use a
dedicated CO sensor.
1.7 Optional sample draw pump
A motorized sample-draw pump is available for
the PHD6 for situations requiring continuous
"hands free" remote monitoring.
The PHD6 continuous
sample draw pump (Sperian Instrumentation
part number 54-54-102) is the only pump that
can be used with the PHD6.
The pump contains a pressure
sensor that detects restrictions in
airflow caused by water or other
obstructions being drawn into the
unit and immediately acts to turn
the pump off in order to protect
the sensors, pump, and other
PHD6 components from damage.
Pump status is continuously
monitored by the PHD6
microcontroller. When the pump
is active and functioning properly,
the spinning pump icon is displayed in the status
bar at the bottom of the display. Low flow or
other pump fault conditions activate audible and
visible alarms and cause the display of the
appropriate explanatory message.
1.7.1 Special precautions when using the
PHD6 pump
The internal material used in the PHD6’s pump
diaphragm seal is susceptible to temporary
compromise by high levels of combustible fuels
and solvents. If the PHD6 is being used in an
atmosphere that may contain concentrations of
combustible fuels and solvents that exceed 50%
LEL, test the pump frequently to ensure that the
seals have not been compromised.
To test the pump, block the sample inlet with a
finger. The pump should go into alarm. If the
pump fails to go into alarm while the inlet is
blocked, the pump is not working properly and
the PHD6 may not be providing an accurate
reading. If the pump test fails, the safest course
of action is to immediately leave the affected
area, and return only after further testing
determines that the area is once again safe for
entry.
Do not use the pump for
prolonged periods in an atmosphere
containing a concentration of solvent or fuel
that may be greater than 50% LEL.
1.8 Data storage
The PHD6 includes a black box data recorder
and an event logger as standard features. A full
datalogger is available as an upgrade at any
time.

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1.8.1 Black box data recorder
A black box data recorder is a standard feature in
the PHD6. The “black box” is continually in
operation whether the user is aware of it or not.
The black box stores important information such
as gas readings, turn-on times, turn-off times,
temperatures, battery conditions, the most recent
calibration date and settings, types of sensors
currently installed, sensor serial numbers,
warranty expiration and service due dates, and
current alarm settings.
There is a finite amount of memory storage
available in the black box data recorder. Once
the memory is “full”, the PHD6 will begin to write
the new data over the oldest data. The black box
data recorder will store a minimum of 63 hours of
data in one-minute increments before it begins to
write new data over the oldest data. In this way,
the newest data is always conserved.
To extract the information from the black box data
recorder, the PHD6 must be returned to Sperian.
Once the data is downloaded from the
instrument, a report will be generated. The unit
and the report will then be returned to the user.
Simply call Sperian’s Instrument Service
Department to obtain a return authorization
number. There is no charge for the downloading
service, but the user is responsible for any freight
charges incurred.
The “black box” data recorder in the PHD6 can
be upgraded to a fully enabled datalogger at any
time. All that is required is the activation code
that corresponds to the serial number of the
PHD6 and the PHD6 Upgrade Utility Program.
1.8.2 Event logger
The event logger in the PHD6 stores data
associated with alarm conditions. Each (alarm)
event includes the following data for each of the
installed sensors:
•Sensor type
•Max reading
•Average reading
•Start time
•End time
•Duration of the event.
The PHD6 stores the data from the 20 most
recent alarm events. Once 20 events have been
stored, the PHD6 will begin to systematically
overwrite the data from the oldest event in
memory with data from new events. One event
may be a combination of different alarms
occurring simultaneously or in immediate
succession. The event logger may be
downloaded using BioTrak software. The PC
must be equipped with IrDA to provide a
connection.
1.9 PHD6 design components
1. Case: The instrument is enclosed in a solid
PC (polycarbonate) case with TPE (rubber)
overmold.
2. Front face: The front face of the instrument
houses the MODE button, navigation keys,
LCD (liquid crystal display), LED alarm lights,
and audible alarm ports.
3. Display: A liquid crystal display (LCD)
shows readings, messages, and other
information.
4. Alarm LEDs: Top, front and side-mounted
LED (light emitting diode) alarm lights provide
a visual indication of alarm state.
5. Infrared Port: The infrared port is located at
the bottom of the instrument and is used for
communication between the PHD6 and a PC.
6. On / Off "MODE" button: The large black
push-button on the front of the instrument is
the "MODE" button. The MODE button is
used to turn the PHD6 on and off as well as
to control most other operations, including
the initiation of the automatic calibration
adjustment.
7. Navigation Keys: The up and down
navigation keys are located between the
MODE button and the display.
8. Sensor compartment cover: The sensors
are located in a vented compartment at the
bottom of the instrument.
9. Audible alarm ports: Two cylindrical ports
extending through the front of the instrument
on opposing sides of the MODE button house
the loud audible alarms. The waterproof
audible alarms seat directly to the rubber
inner-liner to protect the instrument against
leakage or exposure to liquids.
10. Battery pack: Two types of interchangeable
battery packs (rechargeable Lithium Ion (Li-
Ion) and disposable alkaline) are available for
use. Li-Ion battery packs are recharged with
the pack installed on the PHD6.
11. Battery charger connector: A water-
resistant connector at the bottom of the case
assembly is used to connect the PHD6 to the
“drop in” style charger.
12. Battery Compartment / Clip: The battery
inserts from the back of the instrument. A
sturdy clip attached to the battery allows the
user to wear the PHD6 on a belt or other
article of clothing.
1.10 PHD6 standard accessories
Standard accessories included with every PHD6
include calibration adapter, additional tubing for
use during calibration, manual sample draw kit,
reference manual and quick reference card. The
manual sample draw kit consists of a sample
draw / calibration adapter, squeeze bulb,
replacement sample probe filters, ten feet of
tubing and a sample probe.

10
Standard configurations of the PHD6 are
delivered in a cardboard box with cardboard
inserts.
1.10.1 Alkaline PHD6 detectors
If the PHD6 has been purchased as an alkaline
instrument, the standard accessories include an
alkaline battery pack and a set of 3 disposable
AA alkaline batteries.
1.10.2 Li-Ion PHD6 detectors
If the PHD6 has been purchased as a Li-Ion
rechargeable instrument, the standard
accessories include Li-Ion battery pack and a
slip-in PHD6 charger.
1.11 PHD6 kits
PHD6 detectors may also be purchased as part
of a complete kit that includes calibration gas,
fixed-flow regulator and a hard-shell carrying
case.
1.11.1 PHD6 Confined Space Kits
In addition to the standard accessories listed
above, Confined Space Kits also include
calibration fittings, fixed-flow regulator with
pressure gauge, and appropriate large cylinder(s)
of calibration gas in a foam-lined, waterproof
hard-shell carrying case.
1.11.2 PHD6 Value Packs
PHD6 Value Packs include an alkaline PHD6, all
standard accessories, calibration fittings, small
cylinder of calibration gas, and fixed flow
regulator in a foam-lined non-waterproof hard-
shell carrying case.
2. Basic Operations
The PHD6 is a three-button gas detector. Most
day-to-day functions are initiated solely with the
MODE button. The MODE button controls:
•Turning the PHD6 on and off
•Turning on the backlight
•Viewing the MAX, STEL and TWA reading
screens
•Initiating the calibration sequence
2.1 Turning the PHD6 On
To turn the PHD6 on, press and hold the MODE
button for one second. The introduction screen is
followed by a screen showing a list of installed
sensors and the sensor ports they occupy. The
PHD6 has 5 sensor ports, but can display
readings for as many as 6 distinct gases.
→
The serial number will then
be shown. If the detector
has a fully enabled
datalogger, the interval and
memory capacity will be
shown.
The sampling interval is
given in minutes and
seconds. The datalogger
samples continuously, so the data stream must
be broken into intervals to be recorded. The
datalogging interval defines the frequency of the
breaks in the data stream. The capacity is the
number of hours and minutes it will take to
completely fill the datalogger’s memory. Once
the memory is filled, the PHD6 will start to write
new data over the oldest data in order to
conserve that most recent data.
The sampling interval in the fully enabled
datalogger may be modified using BioTrak
Software, the IQ Systems or manually through
the Main Menu.
If the PHD6 is equipped with
the standard black box
datalogger, it will show Black
Box.
In the PHD6, a one-minute
sampling interval will result in
the ability to store a minimum
of 63 hours of readings
before the oldest data is overwritten by new data.
If fewer than 5 sensors are used, the capacity will
increase.
As the instrument performs a
basic electronic self test, the
date, time, temperature and
battery type will be
displayed. During the self-
test, the PHD6 performs a
system memory check and
tests to see if a motorized
pump is attached to the
instrument. If a pump is detected, it will be briefly
activated during the self-test. For details on start
up procedures for pump-equipped PHD6
instruments see section 2.1.1 below.
The PHD6 will then display each installed sensor
along with any associated alarms levels.
→ →

11
→
For more information concerning atmospheric
hazard alarms, see section 2.4.
After the alarm screens, the PHD6 will show that
“Starting Session, Resetting Averages” followed
by the calibrations status screen. Whenever the
PHD6 is turned on, it automatically starts a new
operating session and resets STEL and TWA
calculations. The MAX reading is also reset for
the new session.
→
If calibration is due and the calibration due
warning is enabled, the user will need to
acknowledge the calibration due status by
pressing the MODE button. Once the MODE
button is pressed, the PHD6 will continue to the
current gas readings screen
and the appropriate
calibration due icons will flash
to remind the user that the
instrument is past due for
calibration. If calibration is
not due, the number of days
until the next calibration will
be shown before the
instrument proceeds to the current gas readings
screen.
2.1.1 Start up with pump
PHD6 instruments that are equipped with a built-
in motorized sample draw pump will have a
slightly longer start up sequence. After the
calibration status screens, the PHD6 will prompt
you to leak test the pump.
See section 3.2 for further instructions on
using the PHD6 pump.
2.1.2 Start up with PID or IR sensor
When a PID or IR sensor is
installed in the PHD6, there will
be a warm-up period during
which the hourglass icon and
either “PID” or “IR” will be shown.
The VOC gas type and reading are
shown in reverse text.
PID and IR readings that
are displayed during the sensor warm up
period should not be considered accurate.
The use of the PHD6 to monitor for
compounds detected by the PID or IR sensor
during the warm up period may lead to
inaccurate and potentially dangerous
readings.
2.2 Operating Logic
Once the PHD6 has completed the start up
sequence, the current gas readings screen will be
shown. The status bar at the bottom of the
display shows time plus calibration, pump and
battery status.
To turn on the backlight press the MODE button
once. To view the peak readings screen, press
the MODE button a second time. Press the
MODE button a third time to view the Short Term
Exposure Limit (STEL) and Time Weighted
Averages (TWA) for the operating session.
→
Screens that are accessible with the MODE
button (including the Peak and STEL/TWA
screens) are selectable by the user. See section
5.2.6 for details.
Note: The PHD6 must be in continuous
operation for at least 15 minutes before it will
be able to calculate STEL or TWA values. For
the first 15 minutes of any operating session,
the screen will show the length of time that
the instrument has been operating instead of
the STEL and TWA values.
2.2.1 Status Bar
The status bar at the bottom of the current gas
readings shows general information including:
Battery Status
Heartbeat (instrument status)
Pump Status
PID Hourglass (PID warmup period)
PID Lamp Status (shows “Check Sen.”)
Bump Due Warning
Calibration Due Warning
Time
Battery Status Icon
The battery status icon is located at the far lower
left of the screen. The battery icon gives an
indication of how much power is left in the
battery.

12
When the battery icon is empty, it is
considered a low battery condition and the
user should take the appropriate steps to
either recharge the Li-Ion battery or
replace the alkaline batteries.
For more information on the low
battery alarms, see section 2.5.5.
IR Hourglass Symbol
The hourglass symbol along with IR
are shown in the status bar during
the IR sensor’s 1-minute warm-up
period. Once the warm-up period is over, the
hourglass will no longer be shown.
PID Hourglass Symbol
The hourglass symbol along with PID are shown
in the status bar during the PID sensor’s 5-minute
warm-up period. Once the
warm-up period is over, the
hourglass will no longer be
shown.
When a PHD6 is equipped with both an IR and a
PID sensor, the PID hourglass is shown since the
PID sensor takes longer to warm up than the IR
sensor.
Heartbeat Symbol
When the instrument is properly
charged, calibrated and functioning
normally, the heartbeat symbol will
flash in the status bar.
Pump Status Icon
If the pump is attached and
functioning, the moving fan icon
will appear in the status bar.
Calibration and Bump Due Warnings
If the PHD6 is due for
calibration the calibration
bottle icon and triangular
warning symbol will be flash
in the status bar.
Time
The time is shown on the
current gas readings screen
at the lower right.
2.2.2 Screen Flip
The screen orientation of the PHD6 may be
flipped (so that it can be read looking down from
above instead of up from below) by pressing the
up and down arrows simultaneously at the
Current Gas Readings screen.
2.3 Turning the PHD6 Off
To turn the PHD6 off, press
and hold the MODE button
until the display reads
“Release MODE to shut
down”. Then release the
MODE button. The display
will briefly show “Shutting Down” and “Saving
Sensors” before the display goes blank.
→
2.4 Atmospheric Hazard Alarms
The PHD6 is configured with a series of alarms
that are designed to warn the user of hazardous
atmospheric conditions.
The PHD6 is designed to
detect potentially life threatening atmospheric
conditions. Any alarm condition should be
taken seriously. The safest course of action
is to immediately leave the affected area, and
return only after further testing determines
that the area is once again safe for entry.
2.4.1 O2 Alarms
The PHD6 is equipped with both high and low
alarms for oxygen. Fresh air contains 20.9%
oxygen.
The low oxygen alarm indicates oxygen
deficiency and is normally set at 19.5% at the
factory.
The high alarm indicates oxygen enrichment and
is normally set at 23.5% at the factory.
2.4.2 Combustible Gas Alarms
The PHD6 is equipped with a 2-stage alarm for
concentrations of combustible gas.
The default LEL warning alarm setting is 10%
LEL. The default LEL danger alarm setting is
20% LEL.
The default warning alarm for NDIR-CH4sensors
is 10% LEL or 0.5%/vol CH4. The default danger
alarm is 20% LEL or 1.0%/vol CH4.
2.4.3 Toxic and VOC sensor alarms
The PHD6 is equipped with up to four different
alarms for toxic gases and volatile organic
compounds (VOCs). The combination of alarms
is designed to protect the user from both chronic
and acute toxic hazards.
Current alarm settings are shown during the
startup sequence, and can also be accessed
through the Alarms Menu.
2.4.4 Alarm Descriptions
Warning Alarms
Warning alarms indicate a hazardous
atmospheric condition that has not yet risen to
the level necessary to initiate the danger alarms.
Warning alarms can be temporarily silenced by
pressing the MODE button if this option is
enabled with BioTrak.

13
Danger Alarms
Danger alarms indicate a significantly hazardous
condition. The danger alarms cannot be silenced
by the user.
STEL Alarms
STEL (Short Term Exposure Limit) alarm values
represent the average concentration of
instrument readings for the target gas for the
most recently completed 15 minutes of operation.
TWA Alarms
TWA (Time Weighted Average) values are
calculated by taking the sum of exposure to a
particular toxic gas in the current operating
session in terms of parts-per-million-hours and
dividing by an eight-hour period.
2.5 Other Alarms
The PHD6 will display warnings or error
messages when it detects problems during
operation.
2.5.1 Missing Sensor Alarms
During startup, if the PHD6 fails to detect a
sensor that was present when the instrument was
last turned off, it will show the sensor channel
with “None” and the triangular warning symbol at
the Loading Sensors screen.
↔
Press MODE to acknowledge the missing sensor
If the PHD6 loses connection with a sensor
during an operating session, it
will immediately go into alarm
and show an “X” in the space
on the display allotted for the
sensor reading. The PHD6
must be turned off to reset the
missing sensor alarm.
2.5.2 Sensor Overrange alarm
The PHD6 will show a vertical
double-headed arrow and go into
alarm if a sensor is exposed to a
concentration of gas that
exceeds its established range.
In the case of an LEL reading
that exceeds 100% LEL, the LEL channel will be
automatically disabled by the instrument and the
alarm will latch (remain on) until the instrument is
turned off. The PHD6 must be turned off, brought
to an area that is known to be safe (containing
20.9% oxygen, 0% LEL and 0 PPM toxic gases),
and then turned back on. The display will show a
vertical arrow with two heads in place of the
sensor reading for any channel that has gone into
over range alarm.
A combustible sensor
overrange alarm indicates a potentially
explosive atmosphere. Failure to leave the
area immediately may result in serious injury
or death!
In the event of an LEL
overrange alarm the PHD6 must be turned off,
brought to an area that is known to be safe
(containing 20.9% oxygen, 0% combustible
gases and 0 PPM toxic gases), and then
turned on again to reset the alarm.
2.5.3 PID Lamp Out Alarm
The PID sensor in the PHD6
uses a lamp to ionize the gas
sample and generate a reading.
If the lamp fails to light during
instrument startup, the PHD6 will attempt to start
it for the duration of the warm-up cycle. If the
lamp lights, the PHD6 will complete the warm-up
cycle and then enter standard operating mode. If
the lamp fails to light by the end of the 5-minute
warm-up cycle, the PID channel will be turned off
and the instrument will resume normal operation
with the remaining sensors.
The PHD6 also tests the lamp in the PID sensor
at regular intervals during normal operation. If
the PHD6 determines that the lamp has gone out,
the instrument will display an X in the PID
channel on the display and the instrument will go
into alarm. The status bar at the bottom of the
screen will also show “Check Sen.” to let the user
know that the PID sensor is not functioning.
2.5.4 O2Too Low for LEL Alarms
The LEL sensor in the PHD6 requires a certain
amount of oxygen to function properly. When
oxygen levels fall below 11% by volume, the
PHD6 will show “X“ in place of the LEL reading
and will indicate the oxygen levels are too low.
2.5.5 Low Battery Alarms
When the battery icon in the LCD appears
empty, it means that a low battery
condition exists. Leave the area
immediately.
If the PHD6 is equipped with an alkaline
battery pack, proceed to an area that is known to
be safe area (containing 20.9% oxygen, 0%
combustible gases and 0 PPM toxic gases) and
change the batteries.
The PHD6 must be located
in a non-hazardous location whenever
alkaline batteries are removed from the

14
alkaline battery pack. Removal of the alkaline
batteries from the battery pack in a hazardous
area may impair intrinsic safety.
CAUTION Always turn the PHD6 off prior to
removing the battery pack. Removal of the
battery pack with the instrument turned on
may cause corruption of stored data in the
PHD6.
If the PHD6 is equipped with a Li-Ion battery
pack, proceed to an area that is known to be safe
and recharge the battery pack.
If the PHD6 continues to be used during a low
battery condition, it will eventually go into a low
battery alarm, and the warning alarm will sound
and the screen will display the low battery
warning. To silence the alarms, the user will
need to acknowledge the low battery condition by
pressing the MODE button before the instrument
will resume monitoring. Once the MODE button
is pressed, the empty battery cell and the caution
icon will flash. After 5 minutes the warning will
sound again. This cycle will continue until the
battery reaches a “very low battery” condition,
when the instrument will go into alarm for the last
time, notify the user that it is shutting itself and
proceed to turn itself off.
Alkaline battery replacement and Li-Ion
battery charging instructions are contained in
sections 6.2 and 6.3.
The PHD6 must be located
in a non-hazardous location during the
charging cycle. Charging the PHD6 in a
hazardous location may impair intrinsic
safety.
2.5.6 Calibration Due Warning
If the PHD6 is due for calibration, the triangular
warning symbol and span
bottle icons will flash in the
status bar at the bottom of the
LCD once per second as a
reminder.
2.5.7 Out of Temperature Range
If the operating temperature
falls outside of the normal
operating range of a sensor in
the PHD6, the instrument will go
into alarm and the thermometer
icon will be shown on the display at the sensor.
2.6 PC Connection via Infrared Port
PHD6 instruments that
are equipped with a fully
enabled datalogger can
be downloaded to a PC
using BioTrak or IQ
software through the
PHD6’s infrared port. The
IrDA port is located on the
bottom of the instrument
towards the back.
1. If the PHD6 is turned off, hold the MODE
button down for about 5 seconds until
“Communication Mode” is shown. If the
PHD6 is on already, proceed to step 2.
2. Align the infrared port on
the PHD6 with the PC’s
infrared port to complete
the connection.
Note: For further
instructions concerning the
download procedure for the
PHD6, see the BioTrak or IQ
System manual as appropriate.
2.7 PID sensor reactivity ratios
The PHD6 may be equipped with a PID (Photo
Ionization Detector) sensor designed to detect
Volatile Organic Compounds. The PID sensor
employs an ultraviolet lamp to ionize the VOCs in
the sample. The detector is then able to measure
the level of the VOCs and generate a reading.
While using the PID sensor, it’s important to
understand that the target gas does not need to
be the same as the calibration gas. The PHD6
includes built-in VOC reactivity ratios and can
generate an accurate reading for one VOC while
calibrating with another VOC.
The convention in the gas detection industry
is to calibrate the PID sensor to a known
concentration of isobutylene and (as
required) to use response factors or to select
the scale of target gas from a pre-
programmed menu. Sensitivity scale is
displayed on the channel with 7 character
designation whether it is isobutylene or
another material.
2.7.1 Displayed VOC
To change the displayed
VOC, first enter the Basic
Menu by holding the MODE
button to turn the PHD6 off.
When “Release MODE to
Shut Down” is shown,
continue to hold the MODE
Button until the Basic Menu
is shown.
At the Basic Menu press the down arrow once to
select “Displayed VOC”. A list of Volatile Organic
Compounds will be shown. Use the navigation
arrows to highlight the appropriate VOC and
press MODE to select it. The new VOC will be
shown when the PHD6 is restarted.

15
2.7.2 Specified VOC Calibration Gas
To change the calibration gas for PID sensor,
follow the instruction in section 5.2.1 to reach the
Main Menu. Then access the Calibration Menu
followed by the Gas Values submenu. Once in
the Gas Values submenu, select the VOC
sensor. Then select Cal Gas Type and specify
the appropriate compound and amount for
calibration.
2.8 Special Instructions for NDIR
sensors
Two NDIR sensors are available for the PHD6:
One for the detection of carbon dioxide (CO2),
and one for the detection of methane (CH4).
2.8.1 Special Calibration Requirement for
NDIR CO2(Carbon Dioxide) Sensor
Unlike most sensors the Infrared CO2sensor
requires two different gas sources to fully
calibrate the instrument. The reason for this is
that it is effectively impossible to zero calibrate a
CO2detector in ambient air because there is an
unknown and varying amount of background CO2
present in the atmosphere.
See section 4.4 for more details.
2.8.2 Special Consideration for IR CH4
Methane sensor gas calibration
The NDIR-CH4sensor is designed specifically for
the detection of methane. Gas calibration should
always be done with methane calibration gas at
the actual amount of methane shown the on the
cylinder. See section 4.5 for details.
2.8.3 Hydrogen Warning for IR CH4Methane
Sensor
Unlike other types of sensors used to measure
combustible gases and vapors, the IR CH4 sensor
used in the PHD6 does not respond to hydrogen.
Do not use the NDIR CH4
sensor for the detection of hydrogen. Unlike
catalytic hot-bead LEL sensors, the NDIR CH4
sensor in the PHD6 does not respond to
hydrogen. Use the of the NDIR CH4for the
detection hydrogen may lead to property
damage, personal injury or death.
3. Sampling
The PHD6 may be used in
either diffusion or sample-draw
mode. In either mode, the gas
sample must reach the sensors
for the instrument to register a
gas reading. The sensors are
located on the front of the
instrument near the bottom in a
vented compartment.
The sensor
ports must be kept free of
obstruction. Blocked sensor
ports can lead to inaccurate
and potentially dangerous
readings.
In diffusion mode, the atmosphere being
measured reaches the sensors by diffusing
through vents in the instrument. Normal air
movements are enough to carry the sample to
the sensors. The sensors react quickly to
changes in the concentrations of the gases being
measured. Diffusion-style operation monitors
only the atmosphere that immediately surrounds
the detector.
The PHD6 can also be used to sample remote
locations with either the hand-aspirated sample-
draw kit, or with the motorized sample draw
pump. During remote sampling, the gas sample
is drawn into the sensor compartment through the
probe assembly and a length of tubing.
Do not use the NDIR CH4
sensor for the detection of hydrogen. Unlike
catalytic hot-bead LEL sensors, the NDIR CH4
sensor in the PHD6 does not respond to
hydrogen. Use the of the NDIR CH4for the
detection hydrogen may lead to property
damage, personal injury or even death.
3.1 Manual sample draw kit
The manual sample draw kit is comprised of a
sample draw probe, 2 sections of tubing, a
squeeze bulb and an adapter that is used to
connect the sample draw accessories system to
the PHD6.
Note: The maximum amount of tubing that
can be used with the manual sample draw kit
is 50 feet.
3.1.1 Manual sample draw kit usage
The PHD6’s manual sample
draw kit may not be used
for the detection of
chlorine (Cl2) or chlorine
dioxide (ClO2) due to the
reactive properties of
these gases.
To use the manual sample
draw kit:
1. Connect the short
section of hose that
comes off the squeeze
bulb to the sample draw
adapter.
2. To test the seals in the sample draw system,
cover the end of the sample draw probe with
a finger, and squeeze the aspirator bulb. If
there are no leaks in the sample draw kit
components, the bulb should stay deflated for
a few seconds.
3. Secure the calibration adapter (with the
sample draw assembly attached) to the
PHD6 by inserting the tab and tightening the
knurled screw into the brass nut at the
bottom of the adapter.

16
4. Insert the end of the sample probe into the
location to be sampled.
5. Squeeze the aspirator bulb to draw the
sample from the remote location to the
sensor compartment.
To ensure accurate readings while using
the manual sample draw kit, it is
necessary to squeeze the bulb once for
every one foot of sampling hose for the
sample to first reach the sensors, and
then to continue squeezing the bulb once
per second for an additional 45 seconds
or until readings stabilize. As an example,
if 10 feet of tubing is used, it will be
necessary to draw the sample in by
squeezing the bulb continuously for a
minimum of 55 seconds or until readings
stabilize.
6. Note the gas measurement readings.
CAUTION: Hand-aspirated remote sampling
only provides continuous gas readings for the
area in which the probe is located while the
bulb is being continuously squeezed. Each
time a reading is desired, it is necessary to
squeeze the bulb a sufficient number of times
to bring a fresh sample to the sensor
compartment.
3.2 Motorized sample draw pump
The PHD6
continuous sample draw pump
(Sperian Instrumentation part
number 54-54-102) is the only
pump that can be used with
the PHD6.
A motorized sample-draw pump
is available for the PHD6 for
situations requiring continuous
"hands free" remote monitoring.
The pump is powered by the
PHD6 battery. When the pump
is attached to the instrument, the
spinning fan icon
will be shown on
the display in the
current gas
readings screen.
Note: The maximum amount of tubing that
can be used with the motorized sample draw
pump is 100 feet.
To ensure accurate readings while using the
continuous sample pump, it is necessary to
allow the pump to draw the sample for one
second for every one foot of sampling hose
plus an additional 45 seconds or until
readings stabilize. For example, with 10’ of
tubing, it will be necessary to allow a
minimum of 55 seconds for the sample to be
drawn into the sensor chamber and for the
readings to stabilize.
PHD6 instruments are designed to automatically
recognize the pump whenever it is attached to
the instrument. If the pump is attached when the
PHD6 is turned off, the instrument will
automatically initiate the pump start up sequence
when the instrument is turned on. If the pump is
attached while the instrument is running, the
PHD6 will automatically initiate the pump test
sequence before returning to the current gas
readings screen.
Do not use the PHD6
pump for prolonged periods in an atmosphere
containing a concentration of solvent or fuel
that may be greater than 50% LEL.
3.2.1 Starting the motorized sample pump
First attach the probe and tubing to the pump,
then secure the pump (with the sample draw
assembly attached) to the PHD6 by hooking the
tabs on the pump into the corresponding slots on
the back of the PHD6. Once the pump is in
position over the sensors, tighten the knurled
screw on the adapter into receptor at the center
of the sensor cover.
Note: The sample probe assembly must be
attached to the pump when the pump is
attached to the instrument.
Once the pump is recognized, the pump test
sequence will be initiated automatically. The
instrument will instruct you to block the sample
inlet.
→
Block the sampling inlet by placing a finger over
the end of the sample probe assembly. Once the
blockage is detected, the PHD6 will indicate that
the test has been passed and instruct you to
remove the blockage. Once the blockage is
removed, it will proceed to the current gas
readings screen and the pump icon will be shown
in the status bar.
→
If the instrument is unable to detect the vacuum
resulting from the pump blockage within 30
seconds, the test will fail, the instrument will go
into alarm and you will be directed to remove the
pump.

17
Remove the pump and press the MODE button to
resume diffusion operation.
3.2.2 Turning off the pump
To turn off the pump, simply remove the pump
from the bottom of the instrument. The screen
will show “Pump Fault” followed by “Pump
Disconnected”. Press MODE to continue without
the pump.
→
3.2.3 Pump low flow alarm
The PHD6 Pump contains a pressure sensor that
continuously monitors for restrictions in airflow
caused by water or other fluids being drawn into
the unit and immediately acts to turn the pump off
in order to protect the sensors, pump, and other
PHD6 components from damage.
CAUTION: Never perform remote sampling
with the PHD6 without the sample probe
assembly. The sample probe handle contains
replaceable filters designed to block moisture
and remove particulate contaminants. If the
pump is operated without the probe assembly
in place, contaminants may cause damage to
the pump, sensors and internal components
of the PHD6
When the pump is active and
functioning properly, the moving
pump icon is shown on the lower
status bar on the display. Low
flow or other pump fault
conditions activate audible and visible alarms and
cause the display of the appropriate explanatory
message.
→
Press MODE once the blockage has been
cleared to restart the pump.
The pressure sensor in the sample draw pump is
designed to detect pressure changes while the
sample-draw probe is being held in a vertical
position. If the probe is held horizontally or at a
low angle while inserted into a fluid, a pressure
drop sufficient to cause the pump to shut down
may not be generated, and water could be drawn
into the pump assembly causing damage to the
pump, sensors and internal components of the
PHD6.
CAUTION: Insertion of the sample draw tube
into a fluid horizontally or at a low angle may
lead to water ingress and may cause damage
to the sensors and internal components of the
PHD6.
If the PHD6 determines that a significant increase
in pressure has occurred, it will go into alarm and
notify the user that there is a blockage of the
pump. The display will alternate between the
following two screens.
Remove the blockage and press the MODE
button to acknowledge the alarm and resume
sampling.
3.3 Sample draw probe
The PHD6’s sample draw probe is the standard
probe assembly from Sperian. The sample probe
handle contains moisture barrier and particulate
filters designed to remove contaminants that
might otherwise harm the instrument.
Particulate contaminants are removed by means
of a cellulose filter. The hydrophobic filter
includes a Teflon™barrier which blocks the flow
of moisture as well as any remaining particulate
contaminants.
Sample probe filters should be replaced
whenever visibly discolored due to contamination.
See section 6.5 for a probe diagram and a list
of available sample probe filter replacement
kits.
4. Calibration
The accuracy of the PHD6 should be verified on
a regular basis. Verification can be as simple as
performing a bump test, which is described below
in section 4.1. If the instrument fails the fresh air
test, then it must be fresh air calibrated before
use. If the instrument fails the bump test with
calibration gas, it must be successfully span
calibrated before use.
Note: The NDIR-CO2sensor used in the PHD6
cannot be zero calibrated in fresh air. For
specific instructions on calibrating the CO2
sensor, proceed to section 4.4.
Note: The NDIR-CH4sensor used in the PHD6
must be calibrated with methane calibration
scale to the actual amount of methane in the
cylinder in terms of percent volume methane.
See section 4.5 for details.
* The Canadian Standards
Association (CSA) requires combustible gas
sensors to be bump tested prior to each day’s
use with calibration gas containing between
25% and 50% LEL. The functional (bump) test
procedure is covered in section 4.1.
** The Canadian Standards
Association (CSA) requires combustible gas
sensors to undergo calibration when the

18
displayed value during a bump test fails to fall
between 100% and 120% of the expected
value for the gas.
For Sperian’s official recommendations
concerning calibration frequency, see
Appendix B.
4.1 Functional (Bump) testing
The accuracy of the PHD6 may be verified at any
time by a simple functional (bump) test.
To perform a functional (bump) test, do the
following:
1. Turn the PHD6 on and wait at least three
minutes to allow the readings to fully
stabilize. If an IR or PID sensor is in use,
wait until the stabilization period ends before
proceeding. If any of the sensors have just
been replaced, the new sensor(s) must be
allowed to stabilize prior to use. See section
6.4 for further details on sensor stabilization
requirements.
2. Make sure the instrument is located in fresh
air.
Figure 4.1 Bump Test / Gas calibration set up
3. Verify that the current gas readings match
the concentrations present in fresh air. The
oxygen (O2) sensor should read 20.9%/vol.
(+/-0.2%/vol.). The readings for the LEL
sensor should be 0% LEL. The PID, NDIR-
CH4and toxic sensors should read 0 parts-
per-million (PPM) in fresh air. For the NDIR-
CO2sensor, a carbon dioxide level between
100 PPM and 1000 PPM is considered
normal in fresh air. If the readings deviate
from the expected levels in a fresh air
environment, proceed to section 4.2 and
perform the fresh air calibration adjustment
then proceed to step 4.
4. Attach the calibration adapter and connect
the calibration cylinder to the PHD6 as shown
in figure 4.1. Flow gas to the sensors.
5. Wait for the readings to stabilize. (Forty-five
seconds to one minute is usually sufficient.)
6. Note the readings. Toxic, VOC and
combustible gas sensor readings are
considered accurate in a bump test if they
are between 90%* and 120% of the expected
reading as given on the calibration cylinder.
If the readings are considered accurate, then
the instrument may be used without further
adjustment. If the readings do not fall within
90%* and 120% of the expected reading as
given on the calibration cylinder, then
readings are considered inaccurate. If
readings are considered inaccurate, proceed
to section 4.3 and perform the gas
calibration.
*Note: The Canadian Standards Association
(CSA) requires combustible gas sensors to
undergo calibration when the displayed value
during a bump test fails to fall between 100%
and 120% of the expected value for the gas.
Sperian multi-calibration gas mixtures contain
approximately 18% oxygen. During the bump
test the oxygen sensor should read within +/-
0.5% of the level given on the calibration
cylinder.
4.2 Fresh Air/Zero Calibration
Note: The NDIR-CO2sensor in the PHD6 may
not be zero calibrated in fresh air. See
section 4.4 for further instructions.
Fresh air/zero calibrations
may only be performed in an atmosphere that
is known to contain 20.9% oxygen, 0.0% LEL
and 0 PPM toxic gas.
To initiate the fresh air/zero calibration:
1. Press the MODE button three times within
two seconds to begin the fresh air/zero
calibration sequence. The PHD6 will briefly
display AUTO CAL and then begin a 5-
second countdown.
2. Press the MODE button before the end of the
5-second countdown to begin the fresh
air/zero calibration. The fresh air/zero
calibration is initiated when the PHD6 shows
“Calibrating” on the screen.
→
3. The PHD6 will indicate when the fresh
air/zero calibration is complete. It will then
proceed to a second 5-second countdown for
the gas calibration. If gas calibration is not
required, allow the countdown to reach 0
without pressing the MODE button.
→

19
For instructions on the Gas Calibration,
proceed to section 4.3.
4.2.1 Fresh air calibration failure
In the event of a fresh air
calibration failure, the
alarms will be activated and
the instrument will display
the following screen. Note
that the sensor(s) that fail
the zero calibration are
shown (in this case, CO)
After 3 seconds, the PHD6
will return to the current gas readings screen and
the visual and audible alarms will cease.
When calibration is due, the triangular warning
symbol along with the span bottle icon the
PHD6’s status bar will show
If a successful fresh air calibration is not
performed prior to instrument shut down, the
PHD6 will note that Fresh Air Calibration is due
during instrument start up.
Possible causes and solutions
1. The atmosphere in which the instrument is
located is contaminated (or was
contaminated at the time the instrument was
last fresh air calibrated.
2. A new sensor has just been installed.
3. Instrument has been dropped or banged
since last turned on.
4. There has been a significant change in
temperature since the instrument was last
used.
Recommended action:
Take the instrument to fresh air and allow
readings to stabilize. Perform the fresh air/zero
adjustment again. If the manual fresh air/zero
procedure fails to correct the problem, perform
the manual fresh air / zero calibration procedure
as described in section 4.2.2 below.
4.2.2 Forced fresh air calibration
The PHD6 includes safeguards to prevent fresh
air calibration in contaminated environments. If
the standard fresh air calibration fails a second
time, the instrument may be “forced” to accept
the fresh air calibration by performing the manual
fresh air calibration.
Fresh air calibrations may
only be performed in an atmosphere that is
known to contain 20.9% oxygen, 0.0% LEL
and 0 PPM toxic gas. Performing a fresh air
calibration in a contaminated atmosphere
may lead to inaccurate and potentially
dangerous readings.
1. Initiate the standard fresh air / zero
calibration sequence by pressing the MODE
button three times in rapid succession. The
5-second countdown will begin.
2. Press and hold the down arrow key and then
press the MODE button before the end of the
5-second countdown. Continue to hold the
down arrow.
3. The fresh air/zero calibration is complete
when the instrument begins another 5-
second countdown for the gas calibration. If
gas calibration is not required, allow the
countdown to reach 0 without pressing the
MODE button.
If the PHD6 still fails to calibrate after this
procedure is attempted, contact Sperian.
4.2.3 Fresh air calibration in a contaminated
atmosphere
To fresh air calibrate the PHD6 in a contaminated
atmosphere, connect a cylinder of “zero air”
containing 20.9% oxygen and no contaminants to
the PHD6 and flow gas to the instrument. Then
perform the fresh air calibration. See figure 4.1
above for setup.
4.3 Gas Calibration
Once the fresh air / zero calibration has been
successfully completed, the PHD6 will
automatically proceed to the automatic gas
calibration countdown screen.
Press the MODE button before the countdown is
complete to initiate the gas calibration. The
screen will immediately show “APPLY GAS” and
then list the sensors for calibration and the
expected levels of calibration gas.
→
Note: Sperian
recommends the use of
multi-component
calibration gas for
calibrating the PHD6.
Apply calibration gas. The
readout will change to a
numerical display almost
immediately and show the
current readings along with the expected
calibration gas value.
If multiple cylinders are required to complete the
calibration, the PHD6 will prompt the user to
apply the next cylinder as needed.
As sensors are calibrated,
the PHD6 will briefly show
the reserve values for each
sensor. The reserve values
give an indication of the
remaining sensitivity of the
sensors. When the reserve
value for a specific sensor
reaches 0%, it is time to