2 operating instructions – Gentec-EO UP and XLP12 User Manual

Page 34

Version 5.0

Ultra Series UP Instruction Manual

2 OPERATING INSTRUCTIONS

In order to ensure a long lifetime of accurate measurements, it is recommended that UP wattmeters be
held within the following ambient conditions stated in the specifications.

For a fan-cooled UP, connect the fan to the proper power supply.

NOTE:

The UP55G and UP60G must only be used with the Gentec-EO Power Supply
P/N 201103.

For a water-cooled UP, connect the detector head to a an cooling water supply. The water-cooled
UP is equipped with ¼’’ tube fittings .

NOTE:

The end of the tube must be cut perpendicular to the tubing; the portion of the
outer tubing wall that slips into the fitting must not be deformed or damaged,
otherwise the connection will not be water-tight.

To connect the detector head fittings to the water supply tubing, unscrew the two parts
of the fitting, push the tubing into the part not connected to the detector until it comes to the end of
the fitting; then screw in the two parts of the fitting.

The direction of flow through the head is unimportant. Once you have connected the fittings, check
them for leaks. If you find a leak, check to see if the tubes are pushed in far enough and that the
tubing has not been damaged.

Verify that the flow rate satisfies the minimum values, as indicated on the specifications pages. A
flow rate of at least 1 l/min is recommend for most models. Time variations of water flow rates or
water temperature may cause corresponding oscillations in measurements.

To disconnect the detector head fittings, remove the water pressure and drain the water from the
tubing. Unscrew the two parts of the fitting and pull out the tubing.

NOTE:

Water will usually remain in the detector head after it is disconnected. The
detector should be completely dried out with an air flow before being stored. Be
careful not to blow the water on yourself or on the detector aperture.

Once appropriate cooling is achieved, the UP is ready to be aligned in the intended optical set-up.

1. Remove the power detector cover.

2. Align the detector in the optical set-up, using a safe low-powered beam.

3. For the most accurate measurements, the beam should be centered on the sensor face.

The beam diameter on the sensor should ideally be the same size as the beam diameter of
the original calibration, which corresponds to >98% encircled power centered on 50% of the
sensor’s surface (this complies with the International Electrotechnical Commission standard
#1040: "Power and Energy Measuring Detector..."). Refer to calibration certificate for the
exact calibration beam diameter.

WARNING: Be careful not to exceed the maximum levels and densities stated in

the specifications.