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Table 4 Symptom/Fault Troubleshooting Guide

(continued)

Symptom

Possible Fault/Correction

Readout with

dBm

- Current underflow. Decrease

RANGE

on meter or

increase signal.

Readout is

- Sensor signal saturation. Decrease signal to the

sensor.

Unit does not respond

- Hold function is on. Turn off

, hold.

properly to keyboard input.

- Batteries too low. Recharge NiCd Batteries.
-

P locked up. Turn unit off. Press reset key

located in the back of the unit. Turn unit on.

Display stays on when unit

- Too little power to sense shutdown.

is turned off.

Recharge batteries.

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Содержание 840-C

Страница 1: ...cess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Dem...

Страница 2: ...i Model 840 C HandHeld Optical Power Meter OPERATOR S MANUAL Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 3: ...fects resulting from modification or misuse of any product or part This warranty also does not apply to fuses batteries or damage from battery leakage This warranty is in lieu of all other warranties...

Страница 4: ...EMISSIONS Radiated and conducted emissions per EN55011 Group 1 Class A EN50082 1 IMMUNITY Electrostatic Discharge per IEC 1000 4 2 severity level 3 Radiated Emission Immunity per IEC 1000 4 3 severit...

Страница 5: ...of Operation 2 1 Introduction 6 2 2 Photodetector 6 2 3 Memory Module 6 2 4 Functional Description 7 2 4 1 Input Amplifier 9 2 4 2 Microprocessor and Detector Cal Module E2 PROM 9 2 4 3 AC Wall Mount...

Страница 6: ...3 4 11 Auto 22 3 4 12 Range 22 3 4 13 Wavelength 23 3 5 Performing Basic Measurements 23 3 5 1 Setting the Wavelength 23 3 5 2 Setting the Attenuator Status 24 3 5 3 Power Measurements 25 3 5 4 Backg...

Страница 7: ...nctional Block Diagram 7 3 Detector Cal Module Installation 15 4 LCD Display Layout 16 List of Tables 1 DC Range Electrical Accuracy and Overload Conditions 8 2 AC Range Electrical Accuracy and Overlo...

Страница 8: ...F degrees Fahrenheit Hz hertz cycles per second IR infrared I V current to voltage converter kHz kilohertz kOhm kiloOhms LCD liquid crystal display mA milliamps mm millimeters mV millivolts nA nanoam...

Страница 9: ...Detector Responsivity A W P I R l Input Voltage Burden 5 V at zero current input 10 V max at full range except 100 V max on 5mA range Input Noise The noise performance of the meter is 1 A D count or b...

Страница 10: ...0nA 5 10nA 100uA 1 100nA 2 100nA 5 100nA 1mA 1 1uA 2 1uA 5 1uA 5mA 1 10uA 2 10uA 5 10uA Current Accuracy P P Current Squarewave Range 50Hz 1kHz 1 2kHz 2 5kHz 10uA 5 10nA 1 10nA 2 10nA 100uA 5 100nA 1...

Страница 11: ...s backlight on Battery Indicator Display indicates when 10 battery life is left Display Triplexed backlighted LCD System Accuracy Refer to Table 2 6 1 Measurement Mode Display Display Comment Calculat...

Страница 12: ...e Model 840 C Power Meter as well as Newport s Model 818 Series Detectors Section 3 contains system operation procedures for the HandHeld Power Meter and accessories Section 4 provides for Maintenance...

Страница 13: ...e still allowing the detector to be detached and used with other equipment in the lab For use in fiber optic applications a combined detector calibration module provides connectorized input at the met...

Страница 14: ...r use by qualified personnel who recognize shock hazards or laser hazards and are familiar with safety precautions required to avoid possible injury Read the instruc tion manual thoroughly before usin...

Страница 15: ...rt any such damage to the shipping agent immedi ately Retain the original packing materials in case reshipment becomes necessary Detailed specifications of the Model 840 C HandHeld Power Meter may be...

Страница 16: ...injury or death The CAUTION heading in this manual explains hazards that could damage the instrument In addition a NOTES heading gives information to the user that may be beneficial in the use of thi...

Страница 17: ...the detector The photodetector is operated without voltage bias to reduce dark currents and shot noise The current is then measured by the 840 C power meter and con verted into optical power as descri...

Страница 18: ...al Description 2 4 Figure 2 Simplified Functional Block Diagram Also of importance are the DC and AC electrical charac teristics and conditions under which overload can occur Tables 1 and 2 present th...

Страница 19: ...t divide power range and maximum reading by 0 01 0 1 0 1 so the ranges will be from 1uW to 100mW 2 Power above the maximum will result in O L O L O L O L O L display 3 Electrical accuracy depends on c...

Страница 20: ...ACKGROUND dBm P P and to drive the LCD display The microprocessor used is the Motorola MC68HC705C8 with 8K PROM Software for the microprocessor is kept within the one time programmable read only memor...

Страница 21: ...environmental condi tions specifically temperature and illumination condi tions and understanding the factors that affect power measurement 2 5 1 Quantum Detector Calibration and Accuracy Newport Cor...

Страница 22: ...nanoamps or typically 1 000 to 10 000 times greater than silicon These drifts can be nulled See 3 4 4 Since drift changes occur with time the BACK GROUND should be set just prior to any measurements I...

Страница 23: ...spectrum permits Other tech niques to reduce stray light include using apertures placing the detector in a box or other housing to shield the surface from light which is not coming from the source and...

Страница 24: ...a 3 mm dia Measurement Range 100pW 0 2 mW 100pW 2mW 100pW 2mW 100pW 2mW 100pW 2mW 100pW 2mW w o Attenuator 70 to 7dBm typ 70 to 3 dBm typ 70 to 3 dBm typ 70 to 3 dBm typ 70 to 3 dBm typ 70 to 3 dBm ty...

Страница 25: ...nstrument Section 3 2 3 3 2 1 Battery Charging The Ni Cd batteries can be recharged by using the AC Adaptor at any time The unit may be recharged indefi nitely NOTE The annunciator turns on when the b...

Страница 26: ...g or removing any memory module Align the line on the memory module with the mark on the head of the Model 840 C power meter See Fig 3 Slide the module into the tube until the 8 pin sub mini DIN conne...

Страница 27: ...al logic errors during turn on sequence Turn on the instrument by sliding the switch on the side of the instrument to the 1 position At power up the Model 840 C first performs a display segment test A...

Страница 28: ...ng sections and Figure 6 provide a brief description of the display controls and connectors 3 3 1 Digital Display The Model 840 C has a 4 digit backlit liquid crystal display LCD The minus sign is dis...

Страница 29: ...cklit display 1 and meter on with backlit display B Front Panel Controls Momentary pushbuttons with tactile feedback Also use the display to verify that pressing a key activated desired operating mode...

Страница 30: ...s suggested NOTE The analog output voltage is the result of direct current to voltage conversion of the input current The output voltage does NOT equal the displayed value and it is not affected by th...

Страница 31: ...r to assume that the attenuator supplied with the sensor has been installed and lights the annunciator The meter compensates for the detector plus attenuator combination Pressing the ATTENUATOR key ag...

Страница 32: ...entary or a long approximately 3 seconds depression of the key Both functions compare the measured power against a reference power before the result is displayed Pressing the REF dB key a second time...

Страница 33: ...e 3 4 10 Time Constant The TIME CONSTANT key cycles the display through three moving averages of recent A D conversions In the Fast mode the display shows the most recent A D conversion In the Medium...

Страница 34: ...decibels dBm and dB and using the store and recall of reference power In general absolute accuracy is limited by the accuracy of the detector calibration and environmental factors affecting the detect...

Страница 35: ...ngth cannot be set to within 1 nm of the desired value then the detector memory combina tion being used is not appropriate for this measurement See Sections 4 and 5 for service or replacement 3 5 2 Se...

Страница 36: ...CKGROUND key to suppress the effect of ambient light reaching the detector c Unblock the source and read the power 3 5 5 Ratio Measurements When the ratio mode is selected by momentarily pressing the...

Страница 37: ...cula tionsofthelogarithm Whenindoubt useautorange 3 5 6 1 Log measurements 1 mW Reference dBm The Log measurement mode displays the absolute value of 10 times the logarithm base 10 of the input power...

Страница 38: ...sitive 3 5 6 2 Log measurements Other Reference Powers dB Decibel dB measurements referenced to optical power levels other than 1mW can be read directly from the display of the Model 840 C by utilizin...

Страница 39: ...eference power level can then be recalled at any later time until a new reference power level is saved through the STORE key c Press the STORE key once again to exit the STORE mode d Press and hold th...

Страница 40: ...this section please see Section 5 for details on returning your entire system to Newport for service 4 2 Troubleshooting Guide Table 4 Symptom Fault Troubleshooting Guide Symptom Possible Fault Corre...

Страница 41: ...e signal to the sensor Unit does not respond Hold function is on Turn off hold properly to keyboard input Batteries too low Recharge NiCd Batteries P locked up Turn unit off Press reset key located in...

Страница 42: ...ation data for an individual detector is stored in the Detector Cal Module that accompanies each detector The Model 840 C may be used with other Newport detector attenuator combinations than the one s...

Страница 43: ...32 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 44: ..._____________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________...

Страница 45: ...34 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 46: ...35 Notes Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 47: ...a has been certified compliant with ISO 9001 by the British Standards Institution Newport Corporation Worldwide Headquarters 1791 Deere Avenue Irvine CA 92606 In U S 800 222 6440 Tel 949 863 3144 Fax...

Страница 48: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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