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2240 general specifications, Figure 1 - atmospheric pressure correction factor – Teledyne 2240 – Portable Handheld Hydrogen Leak Detector, 2nd generation User Manual

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Page 7 of 26

M2240 R0

1.

2240 General Specifications

• Sensitivity Range: 50 ppm to 100%
• Display Mode: Values below 0.5% are displayed as a bar

graph. Values above 0.5% are reported numerically in
addition to the bar graph..

• Response Time: Initial response less than 1 second at

hydrogen concentrations of 100 ppm and above

• Analog Output – 0-5 V and 4-20 mA
• Serial Output – 9 pin Sub-D connector in RS-232

configuration transmitting ASCII data in an 8 bit stream
with no parity and 1 stop bit.

• Storage and Operating Conditions

• 0 to 50 degrees C.
• 0% to 95% relative humidity (non-condensing).
• Warm-up time: 5minutes (approximately).
• Battery Life: 6 hrs. (continuous use).

• Atmospheric Pressure Influence: As the

2240 is

calibrated at standard sea level conditions, hydrogen
readings must be corrected for altitude. To compensate for
altitude variations, multiply the instrument reading by the
correction factor indicated in Figure 1.

Example:
At an altitude of 800 m there is a correction factor of 1.10.
A hydrogen reading of 1.5% will be corrected for altitude as
follows:
1.5%H

2

X 1.10 =1.65%H

2

Notes and Calculations – enter your corrections for altitude as a record here:

Page 8 of 26

M2240 R0

Figure 1 - Atmospheric Pressure Correction Factor


F = 1E-08m

2

+

0.0001m

+

1

0.

98

1.

00

1.

02

1.

04

1.

06

1.

08

1.

10

1.

12

1.

14

1.

16

1.

18

1.

20

1.

22

1.

24

1.

26

1.

28

1.

30

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32

1.

34

1.

36

-200

0

200

400

600

800

1000

1200

1400

16

00

1800

2000

2200

2400

A

ltitude [m

]

Alt.

Adju

stme

nt Scal

e Factor

- F