Ophir Optronics Ltd QSR Manuel D’Utilisation

Chapter 6 – Measuring with the Pyroelectric and PD10 Heads

Optimizing the Readings

To turn the external trigger on:

1. Select On from the External Trigger drop down list in the Measurement

Parameters Area.

Figure 6-6 External Trigger Drop Down List

The external trigger is turned on.

To disable the external trigger:

1. Select Off from the External Trigger drop down list in the Measurement

Parameters Area. The external trigger is disabled.

Note: In situations where External Trigger control cannot be used for a

specific head channel, the drop-down control is disabled.

Optimizing the Readings

The StarLab application can be optimized to achieve the most accurate and
efficient results. This section describes the most commonly used optimization of
zeroing the instrument with the head connected.

Zeroing the Instrument

Unlike thermopile and photodiode heads, pyroelectric readings are slightly
dependant on the instrument. Therefore, for the most accurate pyroelectric
energy measurements, it is necessary to zero the head against the instrument with
which it is being used. After this is done, the head is conditioned to work with
that specific instrument. It is not necessary repeat this procedure unless the head
will be used with a different instrument, or with a Laserstar. If this procedure is
not performed, errors of up to approximately 2% may occur.

Note: For pyroelectric, it is necessary to leave the head connected when

zeroing the instrument.

To zero the instrument:

1. Turn off the laser.

2. Check that the instrument is not in an electrically noisy environment and is

undisturbed.

3. Click the right mouse button and select Zeroing from the pop-up menu.

Open the Functions menu and select Zeroing. The Zeroing Instrument
dialog box appears.

StarLab User Guide