57
Appendix D Suggested Calibration
Gases
Use of non-standard
calibration gas and/or calibration kit
components when calibrating the PhD Ultra can
lead to inaccurate and potentially dangerous
readings, and may void the standard
Biosystems warranty.
Biosystems offers calibration kits and long lasting
cylinders of test gas specifically developed for easy
PhD Ultra calibration. Customers are strongly urged
to use only Biosystems calibration materials when
calibrating their PhD Ultra.
1. Mixtures currently available:
Because combustible gas sensors have different
responses to different combustible gases (see
Appendix
B
), Biosystems offers several choices for combustible
calibration gas.
Carbon monoxide, sulfur dioxide, and hydrogen sulfide
are all currently available from Biosystems in small (103
or 58 liter), disposable, standard calibration gas
cylinders.
Please note: Biosystems EZ Cal
¥
multi-component
calibration gas mixtures are available for use with
many common PhD Ultra detector configurations.
The calibration gas supplied in Confined Space Kits
is normally an all-in-one mixture when one is
available. If an all-in-one mixture is not desired,
please order the PhD Ultra and calibration materials
separately.
Part
Number
Calibration gas
mixture
Comments
54-9045E
EZ Cal
¥
Value Pack
multi-component
calibration gas (CO 50
ppm, propane
equivalent 50% LEL, in
air)
Only for use with 54-12-022
“Value Pack” style fixed flow
rate regulator.
54-9041
EZ Cal
¥
multi-
component gas (CO
50 ppm, methane 50%
LEL, in air)
54-9042E
EZ Cal
¥
multi-
component gas (CO
50 ppm, propane
equivalent 50% LEL, in
air)
Recommended for general
purpose use for instruments
with CO and LEL sensors
installed.
54-9043
EZ Cal
¥
multi-
component gas (CO
50 ppm, H2S 25 ppm,
methane 50% LEL, in
air )
Not for use with “CO Plus”
sensors.
54-9044E
EZ Cal
¥
multi-
component gas (CO
50 ppm, H2S 25 ppm,
propane equivalent
50% LEL, in air )
Not for use with “CO Plus”
sensors. Recommended for
general purpose use for
instruments with CO, H2S
and LEL sensors installed.
54-9031 Methane
(CH4) (2.5%
by volume = 50% LEL
in air)
Use when monitoring for
presence of methane or
natural gas only.
54-9032 Propane
(C3H8)
(1.1% percent by
volume = 50% LEL in
air)
Use when monitoring for
presence of propane or
gases with similar response
ratios only.
54-9032E Propane
(propane
equivalent 50% LEL, in
air)
Recommended for use for
general purpose
combustible gas monitoring.
54-9038
n - Hexane (C6H14)
(0.3% by volume =
25% LEL in air)
Use when monitoring for
presence of hexane or
gases with similar response
ratios only.
54-9033 Carbon
monoxide
(CO) (50 ppm in air)
54-9034 Hydrogen
sulfide
(H2S) (25 ppm in
nitrogen)
54-9037
Sulfur dioxide (SO2)
(10 ppm in nitrogen)
54-9039
Zero air (20.9 %
oxygen in nitrogen)
Use for fresh air calibration
in contaminated areas.
