EIT MULTIBRITE MB100AC1 Manuel utilisateur

MultiBriteOperator's Manual

Electronic Instrumentation and Technology, Incorporated

108 Carpenter Drive

Sterling, VA 20164

703/ 478 - 0700

MULTIBRITE

UV MONITORING SYSTEM

OPERATOR'S MANUAL

Documentation Control #90-276 Rev C

MODEL #MB100AC1 90 to 132 VAC INPUT

MODEL #MB240AC1 180 to 264 VAC INPUT

MultiBriteOperator's Manual

Table of Contents

1. INTRODUCTION.....................................................................................................................................................................3

1.1 SIGNAL CONDITIONING MODULE............................................................................................................................................3

1.2 SIGNAL CONVERSION MODULE...............................................................................................................................................3

1.3 DISPLAY MODULE....................................................................................................................................................................3

1.4 ALARM OUTPUTS.....................................................................................................................................................................3

2. UVISENSOR INSTALLATION..............................................................................................................................................4

2.1 CLAMP AND MIRROR METHOD................................................................................................................................................4

2.2 ANGLE BRACKET METHOD .....................................................................................................................................................6

2.3 UVISENSOR WIRING ............................................................................................................................................................8

2.4 CLEANING THE UVISENSOR AND MIRROR ..........................................................................................................................9

2.5 TERMINAL BLOCKS..................................................................................................................................................................9

2.6 ALARM CONNECTIONS ............................................................................................................................................................9

2.7 SIGNAL OUTPUT CONNECTIONS............................................................................................................................................10

2.7.1 0 to 10 Volt Output Connections..................................................................................................................................11

2.7.2 4 to 20 mA Output Connections...................................................................................................................................12

2.8 POWER CONNECTIONS...........................................................................................................................................................13

2.9 CONTROL CONNECTIONS ......................................................................................................................................................14

2.9.1 Lamp Power Detection Input.......................................................................................................................................14

2.9.2 Remote Channel Disable Inputs...................................................................................................................................14

3. SPECIFICATIONS.................................................................................................................................................................15

3.1 DISPLAY.................................................................................................................................................................................15

3.2 OPERATING TEMPERATURE....................................................................................................................................................15

3.3 SENSOR INPUT CURRENT RANGE ..........................................................................................................................................15

3.4 SIGNAL OUTPUT SPECIFICATIONS..........................................................................................................................................15

3.4.1 Current Loop Output....................................................................................................................................................16

3.4.2 Voltage Output..............................................................................................................................................................16

3.5 ALARM OUTPUTS...................................................................................................................................................................16

3.5.1 Contact Ratings ............................................................................................................................................................16

3.5.2 Alarm Trip Point Accuracy ..........................................................................................................................................16

3.6 INPUT POWER REQUIREMENTS..............................................................................................................................................16

3.7 WEIGHT .................................................................................................................................................................................16

3.8 DIMENSIONS ..........................................................................................................................................................................17

3.9 CONSTRUCTION.....................................................................................................................................................................17

4. CALIBRATION AND OPERATION...................................................................................................................................18

4.1 CALIBRATION.........................................................................................................................................................................18

5. APPLICATIONS.....................................................................................................................................................................19

5.1 MONITORING A SYSTEM WITH UP TO FOUR UV SOURCES......................................................................................................19

5.2 MONITORING A SYSTEM WITH MORE THAN FOUR UV SOURCES (CASCADING MULTIBRITE)...............................................19

5.3 GUIDELINES FOR MULTIBRITE USE.......................................................................................................................................20

5.3.1 Methodology.................................................................................................................................................................20

5.3.2 Data Utilization............................................................................................................................................................20

List of Figures

MultiBriteOperator's Manual

1. TYPICAL CLAMP AND MIRROR INSTALLATION..................................................................................................................................5

2. CLAMP AND MIRROR METHOD .........................................................................................................................................................6

3. MIRROR MOUNTING TEMPLATE........................................................................................................................................................6

4. BRACKET MOUNTING DRILL TEMPLATE...........................................................................................................................................7

5. TYPICAL 45º BRACKET INSTALLATION .............................................................................................................................................8

6. TERMINAL BLOCK WITH STRAIN RELIEF SHELL ATTACHED ...............................................................................................................9

7. LOW INTENSITY ALARM CONTACT CONFIGURATION .......................................................................................................................10

8. LAMP POWER FAIL ALARM CONTACT CONFIGURATION....................................................................................................................10

9. POWER ALARM DISABLE EXAMPLE................................................................................................................................................10

10. BACK PANEL ANALOG CONNECTOR DEFINITIONS.......................................................................................................................11

11. 0 TO 10 VOLT CONNECTIONS.........................................................................................................................................................12

12. 4 TO 20 MA CONNECTIONS ...........................................................................................................................................................12

13. BACK PANEL POWER CONNECTOR DEFINITIONS .........................................................................................................................14

14. TIME DELAY SWITCH CONFIGURATION. .......................................................................................................................................14

15. MULTIBRITE TOP VIEW, DIMENSIONAL DIAGRAM.........................................................................................................................17

16. MULTIBRITE FRONT VIEW DIMENSIONAL DIAGRAM .....................................................................................................................18

15. SINGLE MULTIBRITE CONFIGURATION. ........................................................................................................................................21

16. MULTIPLE MULTIBRITE CONFIGURATION.....................................................................................................................................22

List of Tables

1. OUTPUT SELECTION TABLE. ...........................................................................................................................................................11

2. ANALOG VOLTAGE OUTPUT SELECTION OPTIONS. ........................................................................................................................13

3. ANALOG OUTPUT CURRENT LOOP OPTIONS...................................................................................................................................13

4. CHANNEL DISABLE INPUTS.............................................................................................................................................................15

MultiBriteOperator's Manual

1. INTRODUCTION

The MultiBrite System is presented to fill the need for monitoring several UV light sources for the purpose

of relaying a single alarm to an operator when any of the sources falls below the specified limit.

A MultiBrite System is comprised of three major components, the Signal Conditioning Module, the Signal

Conversion Module, and the Display Module, each of which will be described below.

1.1 Signal Conditioning Module

The Signal Conditioning Module accepts up to 4 signals from 4 different UV sensors. Current signals from

the sensors are individually converted to a voltage level that is supplied to the Signal Conversion Module

and to the Display Module. One of the 4 signals is selected by the signal selection switch to be presented to

the display. The display continuously converts the analog voltage signal to a two digit decimal number that

represents the percentage of lamp output relative to the initial calibration level. In addition to the 4 lamp

readings, a low limit signal may be selected for display. This parameter is normally monitored while

adjusting the low limit threshold from the front panel. The adjusted low threshold is used by the level

comparators to determine if the output of any of the 4 lamps has fallen below the allowable light intensity

level.

Four individual analog voltage level outputs are provided by the Signal Conditioning Module as inputs to the

Signal Conversion Module.

1.2 Signal Conversion Module

Analog signals from the Signal Conditioning Module are directed to three possible monitoring sections,

alarm monitor, analog voltage, and analog current.

The signal from the Signal Conditioning Module is converted to a voltage output from 0 to 10 volts on the

signal conversion module. This output DC voltage is proportional to the signal from the Signal Conditioning

Module. The resulting analog voltage output is capable of driving up to a 2 milliamp load at 10 volts.

The converted analog voltage output signal is further converted into a 4 to 20 milliamp signal capable of

supplying current into a maximum load of 250 ohm. The 4 to 20 ma signal is proportional to the applied

input voltage and, consequently, to the measured light intensity.

1.3 Display Module

Each of the four analog signals are routed into one of the 4 individual comparators. Each signal is compared

to the adjusted threshold level that is common to all four comparators. Whenever a signal falls below the

selected threshold, an alarm output connection is made indicating an alarm condition. In addition to the

remote indication provided, a local audible alarm will sound. An alarm silence switch allows the user to

silence the internal audible alarm. An alarm LED will continue to indicate the alarm condition even though

the audible alarm on the Display Module has been silenced.

1.4 Alarm Outputs

MultiBriteOperator's Manual

The alarms will not be activated if power has recently been applied to the system. A dip switch

programmable time delay from 5 seconds to 21.25 minutes will ensure the lamps will be at full intensity

before indicating an alarm condition. The alarm output from a system may be paralleled with any additional

system alarm outputs to allow configuration of a curing system with more than 4 UV sensors. If a below-

threshold condition is detected on any UV channel, the common alarm will be enabled. Local alarms will

identify which sensor cluster initiated the alarm. The local audible alarm may be silenced by the alarm

silence switch without affecting the alarm signal to the common alarm.

To accommodate systems with sensor requirements other than those divisible by 4, individual channel alarm

monitor switches permit disconnecting any input channel from the alarm logic. This same feature allows

removing sensors form the alarm logic when the light source to a sensor is placed in the standby mode.

Power failure to the UV Monitoring System will also cause an alarm condition. Some applications may

require suppression of the alarm if the power to the Monitoring System fails. To accommodate these

applications, a power on signal is available for remote use.

2. UVISENSOR INSTALLATION

Do not allow the UVISENSOR body or cabling to touch the lamp, lamp cabling or end caps. Allow at least

one inch clearance between the sensor and these areas to prevent arcing or insulation damage.

Note the UVISENSOR must be mounted such that the photo detector receives some reasonable amount of

UV light. That is, the detector must be able to "see" the lamp or its reflection. It is not, however, necessary

that the detector be in the focal plane of the lamp, and it is usually not desirable to do so due to the high

temperatures that may result. In addition, caution must be exercised to avoid any contact or proximity to

high voltages typically present in UV curing systems. Further, the sensor and cable should not be in contact

with hot surfaces (temperatures above 130º F).

The cables must be routed away from sources of electrical interference to maintain a quality measurement

signal. Care must be taken to route the cable so that mechanical restriction (such as pinching) or damage

(such as a break in insulation) is avoided to maintain a high quality signal. Connect the UVISENSORS to

the BNC type connectors located on the rear of the MultiBrite.

2.1 Clamp and Mirror Method

In this arrangement the UVISENSOR is mounted so that it views an area in the IRRADIATOR around a

single UV lamp. Figure 1 shows a typical installation. To obtain a suitable mounting location, locate an area

where the center of the mounting clamp and the center of the mirror can be mounted the same distance below

the lamp. Both pieces should be mounted to avoid contact with any moving equipment. The clamp and

mirror should also be located the same distance to the side of the lamp but still remain under the lamps

reflector.

WARNING

ONLY SKILLED PERSONNEL SHOULD ATTEMPT TO INSTALL UVISENSORS. HIGH

VOLTAGES AND HOT SURFACES MAY BE PRESENT AT THE LAMP SITES. TURN

OFF ALL POWER TO THE EQUIPMENT AND ALLOW SUFFICIENT TIME FOR THE

SYSTEM TO COOL PRIOR TO INSTALLING UVISENSORS.

MultiBriteOperator's Manual

Once a suitable mounting location is determined, a 7/8" diameter hole is drilled or punched in the side of the

lamp housing. The clamp is mounted in this hole with the threaded side facing toward the inside of the

housing. Secure the conduit fitting with the jam nut. The UVISENSOR is inserted into the clamp and

secured using the clamp's lock screw. See figure 2.

The mirror should be mounted by drilling two 1/8" diameter holes in the lamp housing directly opposite the

UVISENSOR and secured with the #4-40 screw supplied in the mounting kit. Figure 2 shows details for

mounting the clamp and the mirror. Note that two methods (A and B) are shown for mounting the mirror as

this part has mounting holes on the top and the side. Refer to Figure 3 for a drill template for the mirror.

Mounted as shown in Figure 1, the UVISENSOR will "look" directly across the work area into the mirror

which is reflecting light from the entire length of the lamp reflector.

Because the UVISENSOR's output is very position sensitive, it is important that the mirror and

UVISENSOR be mounted rigidly and care must be taken not to disturb them during re-lamping or cleansing.

MOVING THE UVISENSOR OR THE MIRROR WILL AFFECT THE CALIBRATION OF THE

INSTRUMENT.

Figure 1. Typical Clamp and Mirror Installation

A. CLAMP MOUNTING DETAIL

LAMP HOUSING

SENSOR

LOCKSCREW

CLAMP

JAM NUT

CONVEYOR

MIRROR

LAMP

SIDE PLATE

SENSOR

MOUNTING

CLAMP

JAM

NUT

IRRADIATOR

LAMP

MIRROR

(FAR PLATE)

SENSOR

MIRROR

a) SIDE VIEW

b) END VIEW

CONVEYOR

MultiBriteOperator's Manual

Figure 2. Clamp and Mirror Method

Figure 3. Mirror Mounting Template

2.2 Angle Bracket Method

The other mounting bracket supplied is a reflectorized 45°angle bracket. This bracket allows the

UVISENSOR to be mounted on the side or top of the lamp's reflector housing. Figure 4 shows two typical

installations.

The bracket is mounted by drilling four 0.096 diameter holes and securing it to the lamp housing with the #4

sheet metal screws supplied in the kit. The UVISENSOR is retained in the bracket by sliding it into the large

holes in the bracket and pressing one of the large internal-tooth fasteners supplied on each end of the

UVISENSOR. Figure 4 shows the angle bracket mounting details and also provides a drill template for this

bracket.

In Figure 5A, the angle bracket with the UVISENSOR is mounted on the side of the reflector housing. A

1/4" diameter hole has been drilled through the side of the housing and reflector. This bracket arrangement

allows the UVISENSOR to look directly across the assembly at the far side of the lamp reflector.

.219.438

.17

CENTERLINE OF SENSOR

.125 0 HOLE IN MIRROR

4 PLACES

CENTER OF MIRROR

OPPOSITE SIDE

LIGHT SOURCE

CENTERLINE

SENSOR

MultiBriteOperator's Manual

Figure 5B shows a similar installation with the UVISENSOR looking down at the top of the lamp through a

1/4" diameter hole. In this configuration, the UVISENSOR must look at the lamp and not beside it. This is

to prevent the UVISENSOR from seeing reflections from the work surface below the lamp. Be certain to

remove the protective film from the mirrored surface inside the bracket.

Figure 4. Bracket Mounting Drill Template.

1.75

.53 1.062

.25 O HOLE FOR LIGHT SOURCE

.562

BRACKET OUTLINE

.095 O (NO. 40 DRILL) HOLES

REQD IN MOUNTING SURFACE

IF USING SCREWS PROVIDED

IN MOUNTING KIT

4 PLACES

REMOVE PROTECTIVE

FILM FROM MIRROR

INSIDE OF BRACKET

BRACKET

MOUNTING HARDWARE

4 PLACES

FASTENER ON EACH

END OF SENSOR

SENSOR

MOUNTING SURFACE

LIGHT SOURCE

BRACKET MOUNTING DETAIL

UVISENSOR

LAMP

MultiBriteOperator's Manual

Figure 5. Typical 45º Bracket Installation

2.3 UVISENSOR Wiring

The cable from the UVISENSOR must be routed to the MultiBrite in such a way so as to avoid contact with

the moving equipment, workpieces, lamp bodies and lamp cabling. Use appropriate cable clamps or ties as

necessary to secure the cable.

CAUTION

Do not allow the UVISENSOR body or cabling to touch the lamp, lamp cabling, or end caps.

Allow at least one inch clearance between the sensor and these areas to prevent arcing or

insulation damage.

WARNING

The ends of the lamp and the cables feeding them may have several thousand

volts present. TURN OFF ALL POWER TO THE EQUIPMENT. UNDER NO

CIRCUMSTANCES SHOULD ANYONE ATTEMPT TO PERFORM

MAINTENANCE WHEN LAMP(S) OR EQUIPMENT ARE POWERED. The

lamps, their end caps, and cabling are very hot. Contact with these areas will

result in serious burns. ALLOW EQUIPMENT TO COOL BEFORE ATTEMPTING

TO CLEAN THE UVISENSOR.

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