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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, H

S 25 ppm,

methane 50% LEL, in

air )

Not for use with “CO Plus”

sensors.

54-9044E

EZ Cal™ multi-

component gas (CO

50 ppm, H

S 25 ppm,

propane equivalent

50% LEL, in air )

Not for use with “CO Plus”

sensors. Recommended for

general purpose use for

instruments with CO, H

and LEL sensors installed.

54-9031 Methane (CH

) (2.5%

by volume = 50% LEL

in air)

Use when monitoring for

presence of methane or

natural gas only.

54-9032 Propane (C

)

(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 (C

)

(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

S) (25 ppm in

nitrogen)

54-9037 Sulfur dioxide (SO

)

(10 ppm in nitrogen)

54-9039 Zero air (20.9 %

oxygen in nitrogen)

Use for fresh air calibration

in contaminated areas.

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