Teledyne 2240 – Portable Handheld Hydrogen Leak Detector, 3rd generation (updated 1/31/11) - Manual (Page 23)

Handheld Hydrogen Leak Detector Model 2240
Teledyne Analytical Instruments Page 23 of 30
7. Verification
Verification is performed to confirm that the MODEL 2240
is operating properly. The recommended verification
interval is three months.
The MODEL 2240 requires calibration only if it fails
verification. It can not be field calibrated and must be
returned to Teledyne Analytical Instruments for calibration.
An optional NIST traceable certificate is available.
Once verification has begun, the only way to stop it
prematurely is to cycle the power.
7.1 Gases
Verification requires the availability of the following certified
gases:
2.00% hydrogen by volume in air (20,000 ppm)
0.10% hydrogen by volume in air (1000 ppm)
zero grade, hydrogen-free air. Ambient air can be
substituted if it is hydrogen-free.
7.2 Gas Connection
Gases are applied to the unit through the use of the
Calibration Cup Assy. (P/N 50000009) available from
Teledyne Analytical Instruments.
7.3 Verification Kits
Customer-specific Field Verification Kits for the MODEL
2240 are available from Teledyne Analytical Instruments.
The field verification function allows the user to check the
instrument’s calibration. Details on this function can be
found in Table 1 on page 28.
If the unit passes verification, calibration is not required at
this time.
If the unit fails verification, the unit should be returned to
the factory for calibration.