Gentec-eo QE and XLE4 Manuel d'utilisateur télécharger pdf (Page 24)

QE Series Joulemeter Instruction Manual Version 3.0 April 2014

2 OPERATING INSTRUCTIONS

2.1 When used with compatible monitor

Refer to the respective monitor’s instruction manual for further information.

2.1.1 General Instructions

1- tall the joulemeter on its optical stand.

190 2- Connect the joulemeter to the Gentec-EO laser energy monitor (see Fig. 2-1).

NOTE: The parameters programmed in the DB-15 “Smart Interface” are for a 1 M / 30 pfd

load impedance.

3- Remove the detector's ’rotective cover, when applicable.

4- Put the joulemeter head into the laser beam path (laser beam must be contained within

the aperture).

CAUTION: Be careful not to exceed the maximum levels and densities of, energy, peak

power and average power, stated in the specifications pages. The use of a

damage test target is strongly recommended.

WARNING: 1- At maximum average powers QE Series joulemeter bodies can reach 60°C

and can represent a burn hazard if handled with bare hands.

2- A diffuse back reflection of ~ 30% is present from the joulemeter’s optical

absorber.

NOTE: As with all large aperture pyroelectric devices, these detectors have some position

and beam size sensitivity. For the most accurate measurements, the beam should

normally be centered on the sensor surface and the beam diameter should ideally

be close to that of the original calibration conditions, which is 100% encircled

energy (of a semi-Gaussian beam stopped at 1/e

) applied to a diameter equal to

80% of the detector aperture. The use of a QED Attenuator/Diffuser

, a divergent

lens, a Lambertian diffuser such as opal glass, or any other method of beam

spreading, is recommended for this purpose. Please take note that all of the laser

light must be directed within the detector aperture and that the transmission loss

through the optical component must be known.

See optional accessories section.

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Gentec-eo QE and XLE4 Manuel d'utilisateur Page 24