OPHIR NOVA II Manual de usuario

NOVA ||

LASER POWER/ENERGY METER

USER MANUAL

NOVA

OPHIR OPTRONICS

www.ophiropt.com/photonics

147x200mm

Table of Contents

Chapter 1. Introduction: How to Use This Manual 4

Chapter 2. Quick Reference ..................................5

2.1 Getting Started..............................................................5

2.2 Functions with no Sensor Connected .......................6

2.3 Thermal Sensors...........................................................9

2.4 Photodiode Sensors.................................................. 14

2.5 Pyroelectric Sensors .................................................16

Chapter 3. The Nova II Meter..............................21

3.1 General Description ................................................... 21

3.2 Smart Connectors ......................................................22

3.3 Soft Keys......................................................................22

3.4 Power Up and Shut Down........................................ 24

3.5 Nova II Functions, which are independent of

Sensor Type...................................................................25

3.6 Hardware Functions ................................................28

Chapter 4. Operation with Thermopile Absorber

Sensors ..............................................................32

4.1 Thermopile Absorber Sensors..................................32

4.2 Selecting Settings from the Nova II Screen ...........33

4.3 Startup and Configuration of Defaults ...................35

4.4 Power Measurement.............................................36

4.5 Energy Measurement...............................................45

4.6 Advanced Meter Screens .......................................50

Chapter 5. Operation with Photodiode Type

Sensors ..............................................................54

5.1 Photodiode Sensors...................................................54

5.2 Setting up the PD300 to display the user's chosen

wavelengths ..................................................................55

5.3 Startup Defaults..........................................................56

5.4 Selecting Settings from the Nova II Screen ...........57

Chapter 6. Operation with Pyroelectric Sensors .64

6.1 Pyroelectric & Photodiode Energy Sensors..........64

6.2 Selecting Settings from the Nova II Screen ...........65

6.3 Startup and Configuration of Defaults ....................69

6.4 Energy, Power or Exposure Measurement.............71

6.5 Measuring Repeating Pulses of High Energy......... 77

6.6 Energy Log...................................................................77

6.7 Pyro Scope Adapter...................................................79

6.8 PE-DIF Diffuser Sensors............................................79

Chapter 7. BeamTrack Features..........................81

7.1 Track Screen...............................................................81

7.2 Menu Screen...............................................................82

7.3 Stability Screen ..........................................................82

7.4 Statistics Screen ........................................................83

7.5 Optimizing Measurements ........................................83

Chapter 8. Crcuit Description ..............................85

Chapter 9. Calibration, Maintenance and

Troubleshooting..................................................87

9.1 Calibration of Thermopile or RP Sensors................87

9.2 Calibration of Photodiode type Sensors .................91

9.3 Calibration of Pyroelectric type Sensors................93

9.4 Error Messages ..........................................................97

9.5 Troubleshooting..........................................................98

9.6 Maintenance...............................................................99

Chapter 10. Nova II Specifications ....................100

10.1 System/Meter Specifications .............................. 100

10.2 Sensor Specifications .......................................... 101

Chapter 1.

Introduction: How to Use This Manual

The Ophir Nova II is a microprocessor-based Laser

Power/Energy Meter providing a broad range of

measurements, displays, and data handling options. It

operates with thermopile, pyroelectric and photodiode

sensors, and uses smart connector technology. Just

connecting the sensor configures and calibrates the

instrument.

This manual tells you what you need to know to make

full use of the Nova II for all your laser measurement

needs. It includes a "Quick Reference", (Chapter 2) to

allow you to perform basic measurements immediately,

without reading the whole manual.

The main measurement sections, Chapters 4, 5 and 6

include a general description and a section detailing

operating options.

Chapter 2.

Quick Reference

2.1 Getting Started

The Nova II is equipped with "soft keys." That is the

functions of the keys change as indicated by the legend

above each key. (See Figure 2.2).

To connect sensor to the Nova II Meter

Insert the 15 pin D type connector of the measuring

sensor cable into the socket marked "Head Input" on

the rear panel of the Nova II meter. (See Figure 2.1)

Nova II Rear Panel View

Figure 2.1

12VDC AN OUT HEAD INPUT USB/RS232 OUTPUT

2.2 Functions with no Sensor Connected

2.2.1. Turning on and off.

To switch the Nova II on:

Briefly press the on/off/backlight switch. (Figure 2.2)

The unit will switch on, and the display will appear.

Note:

The sensor must be plugged in before the unit is

switched on.

Figure 2.2

To switch the backlight on and off:

After the Nova II is switched on, press the

on/off/backlight switch briefly again. The backlight will

switch on. To switch off the backlight, press the switch

again.

To switch the Nova II off:

Press the on/off/backlight switch and hold it for ~ 3

seconds until the display blanks.

If you wish to save the current Nova II configuration,

use the "configure" function. (See section 2.2.2).

Display Options

To zero instrument:

1. Disconnect the sensor, turn off then on again.

“Head Disconnected" will be displayed. displayed. skj

2. Make sure instrument is not in an electrically noisy

environment and is undisturbed.

3. Press zero and then start.

To set the Display Modes:

1. Disconnect the sensor and switch off then on

again. “Head Disconnected" will appear.

2. Select “display mode” and enter. Choose the

desired mode and press save. The Nova II will

now be in this display mode for all sensors.

3. Select “date” and press the enter button. Using

the navigation keys set to the correct date. Press

save.

4. Select “time” and enter. Using the navigation keys,

set to the correct time. Press save.

5. For adjusting RS232 baud rate and An. Ouput

voltage see sections 3.5.2 and 3.5.3.

2.2.2.

Setting Contrast:

1. Disconnect the sensor, turn off then on again.

“Head Disconnected" will be displayed.

2. With the navigation keys go into the contrast

setting menu with the icon .

3. Press enter and with the up/down navigation keys

increase or decrease. Press enter when finished.

Language options:

Nova II has two language options, English and

Japanese. In order to switch from English to Japanese:

1. "Language" is found either in “Head Disconnected"

screen (without a sensor connected) or in

"Instrument" screen (with sensor connected).

2. With the navigation keys go to "Language".

3. Press enter and with the down key choose

"Japanese".

4. Press enter when finished.

Warning:

In the event that you mistakably saved the

Japanese language as the Nova II startup

language, the way to switch back to English is:

a. Disconnect the sensor from the Nova II.

b. Turn the Nova II off and on again. You will reach

the instrument setup screen (titled “Head

disconnected” in Japanese).

c. Press the down arrow 4 times.

d. Press enter (central key). This will open a

window to select the instrument language.

e. Select "English" and press enter (central key).

f. Press the “save” soft key and English will now

be saved as your startup language.

2.2.3. Updating the firmware of the Nova II.

1. Download the latest firmware version of the

Nova II from the Ophir website:

www.ophiropt.com/photonics and copy to

your target directory.

2. Turn on the Nova II.

3. Connect the USB communication cable to the

Nova II and the PC.

4. Using the StarLab software press "select

device".

5. Select Nova II. The device name will be

highlighted in blue.

6. Select "upgrade Nova II".

7. Browse and select the file N2AXXX.BIN,

where XXX is the latest firmware version of

the Nova II.

8. Press "start".

9. The status will show "programming" for

several minutes.

10. The status will show a green V sign and state

"finished".

11. Press "Done".

2.3 Thermal Sensors

2.3.1. Use of Nova II with thermal type sensors.

Most Thermopile sensors have somewhat different

absorption at different wavelengths. In order to

compensate for this, each sensor has been calibrated

by laser at several wavelengths. When you choose the

correct laser wavelength, the correction factor for that

wavelength is automatically introduced. Note that the

laser wavelength correction in use is displayed in the

upper left corner of the display.

Thermopile sensors with the LP1 absorber have large

variation of absorption at different wavelengths.

Therefore a continuous spectral curve is inserted into

the sensor, enabling the user to choose the desired

wavelength from the range specified in the

specification sheet and the correction factor for that

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