Ofil Daycor superb Manuel utilisateur

DayCor®

Revision June 2011

Ofil Ltd

User's Guide

POB 4016, Nes Ziona, 74140 Israel

16 Einstein Street,Weizmann Science Park, Nes-Ziona Israel 74000

www.ofilsystems.com ofil@ofilsystems.com

Tel: +(972)-8-940-7953 Fax: +(972)-8-940-7873 USA Toll free: 1-866-2798672

Table of Contents

CHAPTER 1 ......................................................................................................................................................................... 4

GETTING READY.............................................................................................................................................................. 4

CHAPTER 2 ......................................................................................................................................................................... 5

OPERATING TIPS *............................................................................................................................................................ 5

STATUS LINE........................................................................................................................................................................ 5

DISPLAY MODE.................................................................................................................................................................... 5

FOCUSING ............................................................................................................................................................................ 6

UVGAIN ............................................................................................................................................................................. 6

LI –LONG INTEGRATION ..................................................................................................................................................... 7

COUNTING ........................................................................................................................................................................... 7

EXPOSURE............................................................................................................................................................................ 8

STATUS DISPLAY ................................................................................................................................................................. 9

LCD BACK LIGHT................................................................................................................................................................ 9

ZOOM................................................................................................................................................................................... 9

VIDEO RECORDING ............................................................................................................................................................ 10

STILLS RECORDING............................................................................................................................................................ 10

FIRST TRYOUT.................................................................................................................................................................... 10

CHAPTER 3 ....................................................................................................................................................................... 11

INSPECTION TIPS........................................................................................................................................................... 11

HANDLING NON-CORONA UV BACKGROUND ................................................................................................................... 11

CHAPTER 4 ....................................................................................................................................................................... 13

TROUBLESHOOTING..................................................................................................................................................... 13

CHECKING ALIGNMENT OF THE UV AND VISIBLE IMAGES................................................................................................. 13

FOCUS................................................................................................................................................................................ 13

USER MANUAL DAYCOR® SUPERB

Getting Ready

1. Assemble all accessories

so that you have easy

access to them

6. Remove the lenses cover

2. Adjust the shoulder

straps to fit your body

by fastening the straps

3. Fasten the front pad

4. Lean the camera against

the front pad. Use the

grooves to adjust the

viewing angle of the

camera.

5. hook the supporting

harness clip

7. Insert the lenses

cover in the pouch

8. Adjust the LCD

display angle and the

shade

9. Plug in the power

10. You are ready

Chapter 1

USER MANUAL DAYCOR® SUPERB

Operating tips *

Status Line

This function can be turned on/off through the Status function-key. The status line,

positioned at the LCD bottom, shows the current status of the display mode, the focus

mode, the UV gain, if long-integration is on and the counting value. This data is

valuable when processing and analyzing the recorded information and for report

generation.

Here is an example of a status line with and without counting:

Option 1: with counting

COMBINE AF GAIN 180 COUNTER 10000

Option 2: without counting

COMBINE AF GAIN 180 LI 0F

Legend:

Combine = Combined display mode …….(Optional Visible, UV)

AF = Auto Focus…………………………...(Optional MF = Manual focus )

GAIN 180= UV gain with numerical value….(Optional values 0 to 250)

LI 0F= Long Integration 0 frames ………....(Optional values: 0 to 31F = Number

of integrated frames)

COUNTER 10000 = Counting value………(Max value 32768)

Display Mode

The DayCor® Superb bi-spectral camera has 3 operating modes:

Chapter 2

USER MANUAL DAYCOR®SUPERB

•Visible only mode

•UV only mode

•Combined mode

While in the UV only mode, the status line displays the UV gain value only .

The visible only mode is handy when there is a reflection on glass insulators that might

be mistaken for corona. The camera enters the visible only mode during visible

zooming.

Focusing

By default the camera is set to auto focus, and the status line reads AF. The UV focus is

synchronized with the visible focus and follows it as can be heard through the sound of

the UV camera motor when the visible focus changes.

Changing to manual focus is done through pressing on the focus function-key. As a

result a value of the current focus, between 16 and 80, appears on the LCD. The up

and down arrows allow 64 steps of focusing. There is a correlation between the

numbers and the distance of the camera from the corona source. 16 is the value for

infinity and 80 is the value for a distance of 3 meters.

The focus scale is also used when the camera needs to be recalibrated, a procedure that

can easily be performed by the camera operator (special instructions).

When to use manual focus

•When Corona is out of focus while background objects are in focus, as

happens sometimes in substations. The camera is focusing on a prominent

object which is not near the corona so that the corona appears non focused

•Poor illumination conditions might fade out details and slow down or prevent

accomplishing auto focus

•To perform an accurate counting you might wish to defocus and re-focus (see

below)

UV Gain

UV gain values are scaled between 0 and 250. 250 represents the highest sensitivity.

It is recommended to start the inspection with a high gain of about 180 and decrease

the gain when a corona is detected. This will enable pinpointing the source of the

corona. Pressing on gain function-key reveals its value, pressing again will restore its

default value. To change the default value, select a desired UV gain and press on the

Save function-key for 5 sec. A confirmation message will appear on the LCD screen

* It is advised to read the warranty terms before operating the DayCor®

USER MANUAL DAYCOR®SUPERB

LI – Long Integration

Long Integration supports inspection of very weak signals or inspection in areas with

abundant non-corona UV background signals. This function affects the read-out

frequency of frames. Below is an example taken from a distribution line in Costa Rica

(a 35 kV line) where a nearby welding machine generated non-corona UV background.

While in long integration, the CCD of the UV channel is read-out in a lower rate and

each read-out contains the accumulated UV events. Therefore, the UV signals that

repeat in the same place (corona for example) form a larger signal while the random

signals almost do not increase in size. By reducing the UV gain, the random UV signals

can be removed while the repetitive signal, although decreasing in size, will still be

visible on the screen. More in Chapter 3.

Counting

The counting function provides an indication of the corona strength. The camera

displays the number of UV spots generated by corona per minute.(*)

Counting results depend on:

a. Distance and angle of the camera from the corona source

b. Relative ambient humidity. The higher the humidity, the more intense is the

corona activity and the higher is the count

c. Camera settings. Each camera has its innate recommended gain range. This

value is documented in the manufacturer's instruction manual supplied with

each camera. Within this gain range the dependency of the counting on the

UV gain is minimal (plateau range). In other words, within this plateau range

the counting values will be similar in various gain values.

No Integration LI=0 UV Gain 180

Long integration L3, UV Gain 90

USER MANUAL DAYCOR®SUPERB

How to count

Enter the counting mode by pressing on the counting function-key. A small frame will

appear on the display. By pressing the up and down arrows the size of the frame will

change. Position the corona image in the center of the frame and wait until the count

value stabilizes with only small fluctuations.

To count accurately

1) Set the UV gain default to the lower value recommended by the manufacturer,

as appears in your supplied instruction manual.

2) Verify that the camera operates at normal video rate – LI0 (no long integration)

in the status line.

3) Set the camera to manual focus and defocus. By defocusing the camera will

count UV spots that were overlapping in the focused mode and were counted

as a single

spot.

4) The displayed

counting is an

average of the

last 4 display

values, it is

therefore

necessary to wait 4 successive displays, about 25 sec.

Compare counting

Counting can be used as a comparative tool. When comparing counting, it is

important to compare just the reading but keep all other variables that affect

counting such as distance, angle, same camera, and same ambient conditions –

equal.

(*) The camera is not sold as an electrical measuring device and its output does not read directly the pC value of a corona

Exposure

The visible camera, by default, is set to automatic exposure mode.

Under certain light conditions details like cables may be invisible and changing

manually the exposure might help. The exposure affects the recorded video clips and is

a function of the visible channel only.

Focused Defocused

USER MANUAL DAYCOR®SUPERB

To switch to manual exposure, press on the exposure function-key and as a result an

indication of the exposure value appears. Using the up and down arrows the exposure

values are changed. The range of exposure is from 1/10000 down to 1/80 and further

to field modes of 2, 4, 6 and 8 integrated frames.

When aiming against a strong light source or against the sun, never exceed exposure of

1/125 or the visible camera might get damaged.

Status Display

By default the status line is displayed. The status line includes information about the

selected functions and the date and time. It is recommended to keep the status

information while recording. This data is valuable for keeping logs, follow up,

documentation etc.

To turn off press on the OSD key .

LCD Back Light

The LCD back light can be adjusted by the dedicated knob on the LCD. Note that the

brightness does not affect the brightness of the video output.

Zoom

Visible Zooming

Visible zoom values are X25 optical and X12 digital.

When using the visible zoom, the UV camera shows only the visible channel. The

combined mode, visible + UV, will reappear upon exiting zooming.

Rapid Visible Zoom

The camera is equipped with a rapid visible zoom mechanism, which means that the

switch from normal to max optical zoom and backwards takes 1 second by a

continuous key press or release.

Digital UV Zoom

When using the digital zoom the camera remains in combined mode, visible + UV and

the corona is transparent. Zooming values are X2 or X4. Activating this function

brings up the X2 zoom To toggle between the X4 and X2 zoom use the up/down

arrows.

USER MANUAL DAYCOR®SUPERB

Video Recording

To capture Corona it is recommended to record video clips. Corona is a flickering

phenomenon and will not appear in every frame. To capture video clips you need to

use the Rec button. The recorded clips are stored in the SD card. To review the

recorded video clips use the Play-Back option. Press on playback, select HVR. Use F1

to step into the nested folders that are created automatically by date and time. Use

arrows to navigate within a folder. To run a video clip select a file and click on F1. To

step back use the F2. To leave playback click on any other button.

Stills Recording

To capture still pictures use the snapshot button (camera icon). The recorded pictures

are stored in the SD card in the PICTURE folder. To review the captured pictures use

the Play-Back option. Press on the play-back button. Use F1 to step into the nested

folders that are created automatically by date and time. Use arrows to navigate withing a

folder. Display an image using the F1. Step back using F2. Leave playback by pressing

any other button.

First tryout

It is suggested to perform the first tests with the camera away from places with UV

signals, as in urban locations. Set the UV gain to 180, the camera display to UV only,

and direct it slightly away from the sun. Only a few UV random spots should appear on

the LCD screen. If you see abundant random spots and from time to time the screen

becomes “clean” for a short time, you are probably near a workshop where a welding

machine is operating. Under no condition should a non-random UV spot appear

constantly at the same position on the screen (because the camera is fully solar blind).

Note also that some halogen lamps and mercury lamps that are not well-shielded may

emit a lot of UV radiation in the UV Solar Blind band.

When looking for corona set the camera to combined mode, start with gain 180-200,

and then reduce the gain to minimum possible to see exactly the position of the corona

source.

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