Sensor Unit
CORONA REMOTE

株式会社

スペクトラ・コープ〒164‑0011 東京都中野区中央4‑4‑5第一小林ビル
ManualTel:03‑5328‑2858
Fax:03‑5328‑2859
URL http://www.spectra.co.jp

Carl Zeiss Jena GmbHGF Spektralsensorik
D-07740 Jena

Service Contact Numbers:
Phone (+ 49 3641) 642838
Fax(+ 49 3641) 642485
E-Mail info.spektralsensorik@zeiss.de
Internet http://www.zeiss.de/spektral
Documentation number
Carl Zeiss Spektralsensorik 000000-1117-345/01TDst
1 issue, November 2001
Subject to revision service

Contents

CORONA REMOTE 3

General ..................................................................................................................... 5
Safety notes .................................................................................................... 5
Enclosure Protection, radio interference suppression, class of protection........... 5
Service and guarantee ..................................................................................... 5
Intended use ................................................................................................... 6
Installation requirements.................................................................................. 6
Reference measurements................................................................................. 6
Changing replaceable parts ............................................................................. 7
Storage and transport...................................................................................... 7
PC .................................................................................................................. 7
Specifications ........................................................................................................... 8
System overview ..................................................................................................... 9
Description of modules ......................................................................................... 10
PCI interface card ......................................................................................... 10
OMK 500-H measuring head ......................................................................... 11
Light guides................................................................................................... 11
Connecting light guides and electric cables......................................................... 12
Mounting the OMK 500-H measuring head......................................................... 13
Start up, notes on measurement .......................................................................... 14
Care and maintenance........................................................................................... 15
Maintenance ................................................................................................. 15
Changing replaceable parts ........................................................................... 15
Changing plug-in modules............................................................................. 16
Changing the PCI interface card ............................................................... 16
Changing the halogen lamp..................................................................... 16
Care .............................................................................................................. 17
Reference measurements ......................................................................... 17
Handling optical fibres ............................................................................. 17
Handling the OMK 500-H measuring head .............................................. 17
Troubleshooting ....................................................................................................... 18
List of spare parts ………………………………………………………………………….19
List of illustrations..................................................................................................... 20
Index ........................................................................................................................ 21

4 CORONA REMOTE

Safety notes

GeneralWarning: Bundled radiation!
Never look directly into the measuring beam. The bundled radiation can cause eyedamage (e.g. conjunctivitis).
Warning: Electric voltage!
Operate the system only on lines with earthing wire. Make sure the line voltage
corresponds to the operating voltage specified on the rating plate on the rear of thedevice.
When you open covers or remove any parts, live components may become accessible.
Disconnect the system from all sources of power before you open it for maintenance,
repair or replacement of parts.
Caution: Observe installation requirements!
Make sure the requirements specified in section --> Installation requirements are met.
Otherwise, troubles or erroneous results will occur.
Warning: Sensitive optical fibres!
handling optical fibres, observe the following instructions:T Never fold optical fibres. The minimum permissible bending radius is 120 mm.
T Avoid excessive tensile stress and bending strain as well as torsion.
T Do not touch the polished end faces of the optical fibres with your fingers as evenvery thin traces of grease will severely impair measurements.
T these faces are dirty, clean them with a cotton swab soaked in alcohol.
T Always protect the end faces of unused optical fibres with the provided protective
caps.
) Note for replaceable parts:
Use only spare parts listed along with their Catalogue Nos. in the --> List of spareparts.
Caution: Selecting and recording operating parameters!
After every manipulation on the measuring system, such as changing optical fibres,measuring heads, etc., as well as after reinstallation, you should re-select and record theparameters.

Enclosure Protection,
radio interference
suppression,class of protection

Service and guarantee

The sensor has been built and tested to comply with DIN VDE 0411 and IEC 1010-1. It
was shipped by the Manufacturer in a proper technical condition meeting all applicablesafety standards. All instructions in this Manual must be duly followed in order topreserve this condition and ensure safe operation of the sensor.
The sensor meets the requirements in EN 50081-2 (electromagnetic interference). It
qualifies for protection class II and internal protection standard IP65 (NEMA 4).

You must not perform any maintenance or repair work on the instrument system. The
system may otherwise be damaged.
Only persons authorized by the manufacturer may repair the system.
Please contact our service department if defects or faults should occur on the system orindividual components.
In order to guarantee perfect and safe operation, have the measuring system inspectedannually by our service.
You will find the address of the service department on the --> Inside cover page.

CORONA REMOTE 5

The Measuring System CORONA REMOTE with OMK 500-H measuring head consists ofsmall, rugged modules in a protective rack and the OMK 500-H measuring head having
a 0°/45° or 0°/45° circular measuring geometry.
A computer (IBM-compatible) can be connected via an RS-422 serial interface. The
minimal system requirements depend on the software to be used.
The Measuring System with OMK 500-H measuring head serves for diffuse reflectancemeasurements, preferably in the NIR spectral range, in combination with the CORONAREMOTE NIR. The applications of the OMK 500-H include measurement of textured
samples, such as textiles, paper, plastics, powders etc. It is specially suitable for themeasurement of diffuse reflections of samples passing the OMK 500-H measuring headat varying distance, e.g. fluttering lengths of cloth or paper.
Various software packages are available for this measuring system. Please observe theappropriate notes contained in the documentation provided with the software. The
purchased software must have been installed on the computer (PC) that is connected tothe measuring system through a PC interface card and the RS 422 link cable. For any
use of the system other than mentioned above, consult the manufacturer.
The Measuring System with OMK 500-H measuring head may be operated only by
specially qualified or trained staff. Knowledge of this manual is indispensable andconsidered a prerequisite.
The modular construction of the measuring systems with their plug-in cassettes
guarantees rapid and safe change of these units. Further tampering with the system by
the operator is neither provided for nor allowed. The use of optical fibres makes it
particularly easy to customize measuring set-ups and measuring heads to specific tasks.
Thanks to the small entry slit and the large aperture angle, the spectrometer is particularly well suited to coupling the measuring and reference light into flexible optical fibres.
This technique makes it possible to keep little the mechanical expenses of measuring
optics/measuring heads and to set them up at a large distance from the measuring
instrument.

Install the measuring systems in a safe and easily accessible location.
Mount the measuring head so that it is vibration-free.
The operating temperature range of the measuring systems is between +5 °C and+40 °C.
Mount the measuring system to preclude extreme contamination. Avoid direct exposureof the measuring head to extraneous light as far as possible.

Reference measurements should be regularly recorded and their results compared with
one another.
Carry out a reference measurement after every cleaning of the measuring optics, after
replacing parts of the measuring system and after every new installation. Record theresults in a protocol.
A reduction in intensity may have various causes:❒❒❒❒

Faulty optical fibres
Defective spectrometer module
Dirty protective window on measuring head
Aged halogen lamps•

Regularly check all electric connections on the measuring system.

Intended use

Installation
requirements

Reference measurement

General

6 CORONA REMOTE••

Changing replaceable
parts

Storage and transport

Regularly check whether optical fibres are folded or no longer give full performancedue to a rupture of fibres. You can easily test individual optical fibres by replacing
them with spare fibres. Subsequently, run a reference measurement and compare
the results.
The mean lifetime of the halogen lamp is about 1,500 hours. Therefore, replace thehalogen lamp of the measuring head regularly with new ones (depending on its
service life).

Use only the parts listed in the --> List of spare parts.
You can obtain these parts from our service department by specifying the correspondingorder number.
All components of the system (including optical fibres, measuring heads, etc.) are geared to one another. It is therefore not possible to tell anything about the effect of partsof other make on the measuring system. The use of spare parts made by other manufacturers is therefore solely at the responsibility of the operator.

When storing the components and all spare parts, observe the storage temperature andair humidity specified in the Section --> Installation requirements.
Although the components are very rugged, avoid violent shocks. The system is packed
to commercial standards and delivered without any special transportation fixtures orlocks. It is recommended to keep transport cases and packing for possible longer
storage or return to the manufacturer.

PC
The configuration requirements of the PC used depend on the software obtained.
Please observe the notes given in the provided software manuals.

CORONA REMOTE 7

Mechanical Specifications
Range of operating temperatures

0 °C ... + 35 °C

Storage temperatures- 10 °C ... + 65 °C

Power consumption< 30 VAPower supply

12 V, 2.2 A

Spectrometer-PC communicationinterface

RS 422RS 232 *Spectrometer-to-PC distance< 10 m (RS 422)
< 80 m (RS 232/RS)

Digital inputs/outputs

4 inputs (0 ... 24 V external voltage)
4 outputs (0 ... 24 V external voltage)

Dimensions (W x H x D) in mm

About 324 x 168 x 246

WeightAbout 7 kg

Protection grade

IP 65 (NEMA 4)*) optional item, not included in standard delivery

Optical Specifications
Spectrometer

Single-beam diode array

Polychromator

MMS NIR 1.7

Sensor array

InGaAs array, peltier coolingNumber of diodes

128

Wavelength range

950 ... 1680 nm

Spectral resolution

6 nm/diode (18 nm/Rayleigh)Wavelength accuracy< 0.6 nmAmplitude resolution

16 bits

Lightsource

Halogen lamp 5V, 9 W, stabilized

Lifetime of lightsource

About 3000 h

Sensor geometry

0°/45° circular-shaped

Fibre connector

SMA

Working distance

About 13 mm ( for 0°/45° )Measuring spot

About 15 mm &Max. measuring rate

100 measurements/second (with RS 422 interface))
5 measurements/second (with RS 232 interface)

100 % calibration

On external white standard

Specification

8 CORONA REMOTE

2

1

7

6

3
5

4

10

8

9

1 Corona Remote
5
2 Power supply unit
6
3 Electric cable for halogen lamp

Optical fibre
RS 422 link cable
7

4 PCI interface card
(installed in PC)

OMK 500-H measuring headSample plane

Fig. 1 System overview

8
9

10

PC

Power cableDescription of modules

CORONA REMOTE

PC-CORONA REMOTE communication is equally possible via PCI interface card and RS422 link cable.

Turn PC off and disconnect from electrical power supply.
Open PC case in accordance with manufacturer specifications.
Insert interface card into vacant 16-bit slot position and fasten card.
Close PC case.
Restore power supply connection and turn PC on.

11

Description of modules

10 CORONA REMOTEThe OMK 500-H measuring head is designed for measurement of textured samples, such as textiles, paper, plastics,
etc. It is specially suitable for on-line measurement of diffuse reflections of samples with continuously varying distance
between measuring head and sample surface.
The OMK 500-H measuring head contains a 5V 9W halogen lamp (1) powered by the Corona Remote through anelectric cable. An optical system provides sample illumination at 0° (normal to the sample) in a quasi-parallel beam. In
the measuring head, 15 individual optical fibres (2) are uniformly arranged in a ring for sample observation at 45°.
The fibres are bundled to a light guide that is connected to the spectrometer.
With double-beam setup (reference beam), part of the light is directly transmitted to the spectrometer (not via thesample) through an additional light guide1

2

1 Halogen lamp 5 V 10 W
2 Optical fibres
Fig. 3 OMK 500-H measuring head

The diameter of the fibres must be 1 mm. The length can vary between 1.0 and
10.0 m.
The fibres are screwed to so-called SMA connectors.
Such connectors are arranged on the Corona Remote for the OMK 500-H measuring head.
Warning: Sensitive optical fibres!
In handling optical fibres, observe the following instructions:T Never fold optical fibres. The minimum permissible bending radius is 120 mm.
T Avoid excessive tensile stress and bending strain as well as torsion.
T Do not touch the polished end faces of the optical fibres with your fingers as even very thin traces of grease willseverely impair measurements.
T If these faces are dirty, clean them with a cotton swab soaked in alcohol.
T Always protect the end faces of unused optical fibres with the provided protective caps.

Mounting the OMK 500-H
measuring head

CORONA REMOTE 11

1
2

Loosen conduit gland nut (4) of the power supply cable on the
OMK 500-H measuring head.
Loosen plug screw (2) and carefully take off casing cover (5) upward.
Loosen (about half a turn) conduit gland nut (3) and hexagon socket screw (6).
Thread optical fibre through conduit gland nut (3), push it into receptacle (7)as far as it will go, and lock it by means of hexagon socket screw (6).
Carefully reattach casing cover and clamp it by means of plug screw (2).
Screw down both conduit gland nuts.

4
5

6
7

) Important note:
In the bottom section of the OMK 500-H measuring head, highly
sensitive fibres are arranged. Therefore, the measuring head must not be
opened by the user.
Unauthorized opening of the measuring results in forfeiture of the right toclaim under warranty.
1 Optical fibre
2 Plug screw
3 Conduit gland nut (fibre)
4 Conduit gland nut (fibre)
5 Casing cover
6 Clamp screw
7 Fibre recaptacle

Connect light guide (1) to SMA connector on front side.
Connect the halogen lamp supply cable to the appropriate connector on thefront panel of the CORONA REMOTE.
) Note:If the system is accommodated in a protective casing or protective cabinet,
you have to remove the connector from the supply cable. Then thread thecable through the provided conduit. Reconnect the connector to the supply
cable and connect it to the CORONA REMOTE. Subsequently, screw in the
conduit gland nut of the cable conduit tightly.

Fig. 4 Connecting optical fibre to OMK 500-H

1
2
(3 )
(3 )

•

Subsequently, screw in plug screw (1) with plastic washer and connect light guide to spectrometer.
1 Plug screw
2 Grub screw
3 Closing plug

Fig. 5 Mounting the reference light guide12 CORONA REMOTE

3450

You can mount the OMK 500-H measuring head by means of four screws (M5) to any
support having the drilling hole configuration illustrated in Fig. 12. The thread depth on themeasuring head is 8 mm.
If the sample thickness is always the same, you can mount the measuring head at a fixed,
defined clearance to the sample surface.
The optimum clearance between OMK 500-H measuring head and sample surface
is achieved when the detected energy is maximum. The optimum clearance isabout 13 mm ... 15 mm.
If, however, you want to measure vertically fluttering samples or samples having varying
thickness, we recommend the use of a vertically adjustable measuring table. This tableis tobe mounted between measuring head and holder.
M5

34
50

M5

1

Fig. 6 Mounting surfaceon measuring head

2

5

3
4

1 Vertical control
2 Holder3 Measuring table
4 Adapter plate
5 OMK 500-H measuring headFig. 7 Mounting measuring head with measuring table

Mounting the OMK 500-H
measuring head

CORONA REMOTE 13

Start up••Turn on the PC and start the appropriate software.
Observe the instructions given in the software manual.
Turn on the system by turning the key switch clockwise. The green LED on the
CORONA REMOTE lights up.

Adjusting optimum clearance between OMK 500-H measuring head and sample
This adjustment serves to find the clearance ensuring least sensitivity to distancevariations.
This point is identical with that point at which maximum intensity will be transferred.
Adjustment is as follows:••

Put a diffuse white standard underneath the OMK 500-H measuring head.
Activate an operating mode providing simultaneous energy display.
Observe the instructions given in the software description.
• Vary the clearance between measuring head and sample surface until the energy
display is maximum.
) Note:Set an integration time that yields a display sufficiently high for visual evaluation.
During vertical adjustment you must keep constant the integration time.
Final adjustment of integration time•••

Put the diffuse white standard underneath the OMK 500-H measuring head.
Switch to monitor mode and, with the found optimum clearance between
measuring head and sample surface, select the definite integration time.
The set integration time shall allow the signal level to be set to about 60 ... 80% of
the possible control range using the white standard.

Selecting further parameters•

For this, observe --> appropriate software descriptions.

) Note:It is absolutely necessary that you select a spectral range 380 nm ... 780 nm andReflection ordinate mode.
Do not activate Automatic dark current measurement.
Dark current measurement•

Put the diffuse black standard underneath the OMK 500-H measuring head.

Reference measurement•

Put the diffuse white standard underneath the OMK 500-H measuring head.

Sample measurement•

Put the sample underneath the OMK 500-H measuring head at the optimum
clearance.
• Save measured data and evaluate them using the software.
See also --> Program description of software.

Notes onmeasurement

14 CORONA REMOTE

Maintenance

Changing replacableparts

Care and maintenance

To prevent damage of the system, do not perform care, maintenance and repair workon the instrument beyond that described in this section. Except for the complete
exchange of plug-in modules, the system may only be repaired by technicians
authorized by the manufacturer.

Use only the parts listed in the --> List of spare parts. You can obtain these parts fromour service department by specifying the corresponding order number.
All components of the system (including lamps, optical fibres, measuring heads, etc.) are
geared to one another. It is therefore not possible to tell anything about the effect ofparts of other make on the measuring system. The use of spare parts made by othermanufacturers is therefore solely at the responsibility of the operator.

Care and maintenance

CORONA REMOTE 15

Observe the instructions given in your PC manual regarding the installation of PC cards.
• Switch off the PC and disconnect it from mains.
• Open PC casing following the instructions of the PC manufacturer.
• Remove PC interface card from 16 bit slot and insert the new card. Fix it.
• Close PC casing and switch on the PC.

•
•
•
•
•
•

•
•

Switch off instrument and disconnect power cable.
On OMK 500-H measuring head, loosen both conduit gland nuts (2) by about half aturn.
Loosen plug screw (1) with plastic washer. Take off casing cover (3) carefully.
Loosen sleeve nut (4) and pull out the connector.
Loosen the right-hand hexagon socket screw (5) using the long leg of the Allen key.
Pull out the defective halogen lamp (6). Push in a new lamp into the receptacle as far
as it will go. Clamp it, reconnect the connector and lock it by screwing in sleeve nut(4).
Carefully reattach casing cover (3). Fasten it by means of plug screw (1).
Screw down both conduit gland nuts (2).

1
2
3

4
5
6

1 Plug screw
2 Conduit gland nut
3 Casing cover
4 Sleeve nut
5 Hexagon soket screw (not shown)
6 Halogen lamp
Fig. 8 Changing the halogen lamp

Changing the PCIinterface card

Changing the
halogen lamp

Care and maintenance

16 CORONA REMOTE

Care

T
The housing may be cleaned externally with a commercial (non-aggressive)
cleaning agent.

Handling optical fibres

In handling optical fibres, observe the following instructions:T Never fold optical fibres. The minimum permissible bending radius is 120 mm.
T Avoid excessive tensile stress and bending strain as well as torsion.
T Do not touch the polished end faces of the optical fibres with your fingers as evenvery thin traces of grease will severely impair measurements.
T If these faces are dirty, clean them with a cotton swab soaked in alcohol.
T Always protect the end faces of unused optical fibres with the provided protective
caps.

Handling the OMK 500H
measurement

Avoid violent shocks to the support of the measuring heads so as not to spoil theiradjustment.
If the measuring head was unscrewed, it must always be readjusted.
The protective window of the measuring head is very sensitive. Avoid shocks to andscratches on the surface of the protective window.
Never remove the lower part of the measuring head. Non-observance of this instruction
will result in forfeiture of the right to claim under warranty.
If the measuring head is defective, consult the service department. You will find theaddress of the service department on --> Inside cover page of this manual.
Cleaning measuring heads
A dirty protective window may lead to incorrect measurements. Therefore, clean it
regularly. The cleaning intervals depends on the degree of contamination at the site ofuse. It should, however, be done at least once a week.
Clean the dirty protective window of the measuring head with a soft, lint-free cloth thathas been moistened with distilled water or a special optical cleaning agent.

Referenemeasurements

Reference measurements should be regularly recorded and their results compared with
one another. A reduction in intensity in reference measurements may indicate heavy
contamination.
Carry out a reference measurement after every cleaning of the protective window, after
replacing parts of the measuring system and after every new installation. Record theresults in a protocol.
A reduction in intensity may have various causes:❒❒❒❒

Faulty optical fibres
Defective spectrometer module
Dirty measuring optics
Aged halogen lamps••

Regularly check all electrical connections on the measuring system.
Regularly check whether optical fibres are folded or no longer give full performancedue to a rupture of fibres. You can easily test individual optical fibres by replacing
them with spare fibres. Subsequently, run a reference measurement and compare
the results.
Replace the halogen lamp of the measuring head regularly with new ones. We
recommend to do this after every three months each.

•Fehler - Ursachen - Abhilfe

Error

CausesNo signal intensity available •Halogen lamp does
not light

CORONA REMOTE 17

Remedy• Make sure that cable isproperly connected to
power supply module..
• Halogen lamp defective,change it.

Intensity too low•

Faulty light guideconnection•

Measuringhead/sample
clearance is not
optimum• Check fibre connections
in measuring head andon spectrometer.
• If necessary, maximize
intensity by slightly twisting
fibre about its axis atconnectors onspectrometer andmeasuring head.
• See section -->Connecting
optical fibres and electric
cables.
• See section --> Notes
on measurement.

Integration time too low
No communication
between PC andinstrument•

System not switchedon or power supply
disconnected• Connect to mains.
• Switch on system (green
LED at key switch mustlight).
• Check fuses.

•

RS 422 cable notconnected
or screwed down

• Check RS 422 cableconnection.

Measured data is drifting•

Reference data mustbe
updated every 30 ...
60 min depending on
ambient conditions
and accuracy
requirements.

• Update reference data
(white standard anddarkcurrent measurement)

Poor reproducibility•

Integration time andaccumulation too low•

Intensity too low• Increase measuringtime.
• See this table -->Intensity too low•

Sample/measuring
head
clearance varies toostrongly• Optimize clearance. See
section --> Notes on
measurement.

Spare part list

18 CORONA REMOTE

Designation

Type

Catalogue No.

Light guide

Variable length

on request

PC interface card

PCI RS422 Card

407.910

Halogen lamp

5 V, 9 W

226030-8001.000

IndexNo.
Fig. 1
Fig. 2
Fig. 3Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8CORONA REMOTE 19

Subject ....................................................................................... Page
System overview .............................................................................. 9
PCI card......................................................................................... 10
OMK 500-H measuring head .........................................................11
Connecting optical fibre to OMK 500-H......................................... 12
Mounting the reference light guide................................................ 12
Rear panel of casing ............ ......................................................... 13
Mounting surface on measuring head............................................ 13
Changing the halogen lamp .......................................................... 16

B
Bending radius ............................................................................................................. 5C
Control range ............................................................................................................ 18

D
Dark current measurement......................................................................................... 18

E
Enclosure Protection..................................................................................................... 5

H
Halogen lamp .................................................................................................. 7, 15, 19

I
Installation requirements .............................................................................................. 6
Integration time ......................................................................................................... 20
Interface, RS 422.......................................................................................................... 6

L
Light guide............................................................................................................. 5, 16M
Measuring geometry .................................................................................................... 6OOMK 500-H measuring head..........................................................................10, 15, 17

P
PC ............................................................................................................................... 7
PC interface card ................................................................................................. 10, 13
Protection, Class of ...................................................................................................... 5R
Radiation ..................................................................................................................... 5
Reference measurement............................................................................................. 18

S
Signal level................................................................................................................. 18
Spare parts, list of ...................................................................................................... 19
Specifications ................................................................................................................8