Newport 1825-C Owner's Manual

O

PERATOR’S

M

ANUAL

Model 1825-C
Power/Energy Meter

Model 1825-C
Power/Energy Meter

Warranty

Newport Corporation warrants this product to be free from defects in material
and workmanship for a period of 1 year from the date of shipment. If found to
be defective during the warranty period, the product will either be repaired or
replaced at Newport’s option.

To exercise this warranty, write or call your local Newport representative, or
contact Newport headquarters in Irvine, California. You will be given prompt
assistance and return instructions. Send the instrument, transportation
prepaid, to the indicated service facility. Repairs will be made and the instru­ment returned, transportation prepaid. Repaired products are warranted for
the balance of the original warranty period, or at least 90 days.

Limitation of Warranty

This warranty does not apply to defects 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, expressed or implied, includ­ing any implied warranty of merchantability or fitness for a particular use.
Newport Corporation shall not be liable for any indirect, special, or conse­quential damages.

Statement of Calibration

This instrument has been inspected and tested in accordance with specifica­tions published by Newport Corporation.

The accuracy and calibration of this instrument and photodetector (where
applicable) is traceable to the National Institute for Standards and Technology
through equipment which is calibrated at planned intervals by comparison to
the certified standards maintained at Newport Corporation.

Copyright 1997, Newport Corporation
Part No. 19572-01, Rev. F
IN-04925 (07-97)

ii

EC DECLARATION OF CONFORMITY

Active Isolation Module Set Series

We declare that the accompanying product, identified with the

" " mark, meets the intent of the Electromagnetic Compatability
Directive, 89/336/EEC and Low Voltage Directive 73/23/EEC.

Compliance was demonstrated to the following specifications:

EN50081-1 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, severity level 2
Fast Burst Transients per IEC 1000-4-4, severity level 3
Surge Immunity per IEC 1000 4-5, severity level 3

IEC SAFETY:

Safety requirements for electrical equipment specified in
IEC 1010-1.

Model 1825-C

Alain Danielo Jeff Cannon

VP European Operations General Manager-Precision Systems
Zone Industrielle 1791 Deere Avenue
45340 Beaune-la-Rolande, France Irvine, Ca. USA

iii

Table of Contents

Warranty ...........................................................................................................ii

EC Declaration of Conformity ........................................................................ iii

List of Figures .................................................................................................. vi

List of Tables ................................................................................................... vi

Safety Symbols and Terms ............................................................................ vii

General Warnings and Cautions ................................................................... vii

Abbreviations ................................................................................................ viii

Specifications................................................................................................... ix

Section 1 – General Information

1.1 System Overview ................................................................................... 1

1.2 Scope of this manual ............................................................................. 1

1.3 Unpacking and Inspection .................................................................... 2

1.4 Preparation for Use ............................................................................... 2

1.5 Optional Accessories and Services ..................................................... 2

Section 2 – System Operation

2.1 Introduction ........................................................................................... 3

2.2 Display .................................................................................................... 3

2.3 Front and Rear Panel Controls ............................................................. 4

2.3.1 RANGE ........................................................................................... 5

2.3.2 ZERO ............................................................................................. 5

2.3.3 AVERAGE ...................................................................................... 6

2.3.4 MODE ............................................................................................ 6

2.3.5 CAL Slide Switch .......................................................................... 6

2.3.6 SETUP Dip Switches .................................................................... 7

2.3.7 EXP. ADJ. Rotary Dip................................................................... 7

2.4 Using the System ................................................................................... 7

2.4.1 Battery Charging ......................................................................... 7

2.4.2 Power Up ...................................................................................... 8

2.4.3 Detector Connection and Setup ................................................ 8

2.4.4 Setting the Detector Calibration Factor ................................... 8

2.4.4.1 Calibration Factor Mantissa Entry ................................... 9

2.4.4.2 Calibration Factor Exponent Entry................................... 9

2.4.5 Signal Averaging .......................................................................... 9

2.4.6 Signal Integration ...................................................................... 10

2.4.7 Peak-to-Peak Power Measurement .......................................... 11

2.4.8 Pulse Energy Measurement...................................................... 11

2.4.9 Detector Acceleration Time Constant .................................... 12

2.4.10 Analog Output ............................................................................ 13

Page

iv

Section 3 – Principles of Operation

3.1 Introduction ......................................................................................... 14

3.2 Functional Description ........................................................................ 14

3.3 Measurement Considerations ............................................................ 15

3.3.1 Detector Calibration and Accuracy ........................................ 15

3.3.2 Quantum Detector Temperature Effects ................................ 16

3.3.3 Thermopile Detector Temperature Effects ............................ 16

3.3.4 Energy Detector Temperature Effects .................................... 16

3.3.5 Ambient and Stray Light ........................................................... 16

3.4 Performing Basic Measurements ....................................................... 17

3.4.1 Making a CW Power Measurement ......................................... 17

3.4.2 Making a Signal Integration Measurement ............................. 18

3.4.3 Making a Pulse Energy Measurement ..................................... 18

3.4.4 Common Measurement Errors ................................................ 19

3.5 System Accuracy ................................................................................. 19

Section 4 – Test, Maintenance and Troubleshooting

4.1 Maintenance Procedures .................................................................... 20

4.2 Troubleshooting Guide ....................................................................... 20

Section 5 – Factory Service

5.1 Introduction ......................................................................................... 21

5.2 Obtaining Service................................................................................. 21

5.3 Service Form......................................................................................... 23

v

List of Figures

Figure 1 Model 1825-C and Accessories.......................................................... 1

Figure 2 Model 1825-C Display ......................................................................... 4

Figure 3 Model 1825-C Front Panel Detail ....................................................... 5

Figure 4 Model 1825-C Rear Panel Detail ........................................................ 5

Figure 5 Detector Setup Table.......................................................................... 8

Figure 6 Integrated Energy from Exposure to an Optical Power ............... 10

Figure 7 Integrated Energy from a Pulse Energy Optical Source ............... 10

Figure 8 Peak-to-Peak and Other Signal Types............................................. 11

Figure 9 Pulse Signal Detection ...................................................................... 12

Figure 10 Detector Time Constant ACCEL. ADJ. Setting ............................... 13

Figure 11 Simplified Model 1825-C Functional Block Diagram ..................... 14

Figure 12 Typical Energy Detector Signal Waveform .................................... 15

List of Tables

Table 1 Model 1825-C Display Annunciators ................................................. 3

Table 2 Model 1825-C Front Panel Controls .................................................. 4

Table 3 MODE Switch Position and Detector Compatibility ....................... 6

Table 4 CAL Slide Switch Functions ............................................................... 6

Table 5 SETUP Dip Switch Functions ............................................................. 7

Table 6 EXP. ADJ. Rotary Dip Switch Settings .............................................. 9

Table 7 Common Measurement Errors ........................................................ 19

Table 8 Symptom/Fault Troubleshooting Guide ........................................ 20

vi

Safety Symbols and Terms

The following safety terms are used in this manual:

The Warning heading in this manual explains dangers that could result
in personal injury or death.

The Caution heading in this manual explains hazards that could damage
the instrument.

In addition, a Note heading gives information to the user that may be
beneficial in the use of this instrument.

General Warnings and Cautions

The following general warnings and cautions are applicable to this instru­ment:

Warning

This instrument is intended for use by qualified personnel who
recognize shock hazards or laser hazards and are familiar with
safety precautions required to avoid possible injury. Read the
instruction manual thoroughly before using, to become familiar
with the instrument’s operations and capabilities.

Warning

The American National Safety Institute (ANSI) states that a shock
hazard exists when probes or sensors are exposed to voltage levels
greater then 42VDC or 42V peak AC. Do not exceed 42V between
any portion of the Model 1825-C (or any attached detector or
probe) and earth ground or a shock hazard will result.

Caution

There are no user serviceable parts inside the Model 1825-C. Work
performed by persons not authorized by Newport may void the
warranty. For instructions on obtaining warranty repair or service
please refer to section 5 of this manual. Do not operate this unit via
its AC Adaptor without the included rechargeable battery pack
installed. Use only the AC Adapter provided with the Model 1825­C by Newport.

vii

Abbreviations

A amps

AC alternating current

ADC analog-to-digital converter

BAT battery

BIC biconic fiber connector

BNC standard coaxial connector type

°C degrees Centigrade

DC direct current

°F degrees Fahrenheit

Hz hertz (cycles per second)

I-V current-to-voltage converter

kHz kilohertz

kΩ kiloOhms

LSD least significant digit

mA milliamps

mV millivolts

nA nanoamps

nF nanofarads

nm nanometers

P-P peak-to-peak

RH relative humidity

S/N serial number

µA microamps

µs microseconds

V volts

W watts

viii

Specifications

Physical Specifications

Dimensions: 3.75 × 7.5 × 9.25 in. (95 × 191 × 235 mm)

Weight: 5 lb (2.3 kg)

Enclosure: Metal case, painted

Connectors: Signal Input BNC; Signal Output BNC;

Power 2.5 mm Phone Jack

Power: 12 VDC, 200 mA unregulated

Battery Life: 20 hours

Battery Type: Lead acid rechargeable, 1000 cycles

Display: 3.5 digit annunciated LED and analog

meter

Reading Rate: 12 Hz Max.

Range Switch: 12 position, 6 decades of gain

Operating Environment: <90 % RH Noncondensing. 5 to 40°C

Storage Environment: <90 % RH Noncondensing. -25 to 60°C

Compatible Detectors: Low-Power Detectors; Except 818-F-SL and

818-F-IR

High-Power Detectors

Energy Detectors; Except 818J-S10

ix

Electrical Specifications:

(0)

Position 7

Position 8

Position 9

Position 10

Position 11

Position 12

Position 5

Position 4

Position 3

Position 2

Position 1

Position 6

Range Knob Positions

Range Switch Position 1 & 2 3 & 4 5 & 6 7 & 8 9 & 10 11 & 12

Full scale measurement (divide value by calibration factor mantissa)

Semiconductor 200nA 2µA 20µA 200µA 2mA 20mA

Thermopile 2mV

(2)

2mV 20mV 200mV 2V 20V

Pyroelectric 20mV 200mV 2V 20V 200V 2kV

(1)

(3)

(4)

Relative noise factor (peak-to-peak, measured relative to full scale)

Semiconductor 0.2% 0.02% 0.1% 0.01% 0.01% 0.01%

Thermopile 0.03% 0.03% 0.2% 0.02% 0.02% 0.01%

Pyroelectric 0.3% 0.09% 0.2% 0.02% 0.01% 0.01%

Analog Output Bandwidth

(7)

Semiconductor 150Hz 150Hz 25kHz 25kHz 150kHz 150kHz

Thermopile 5Hz 5Hz 20kHz 20kHz 100kHz 100kHz

Pyroelectric 75kHz 75kHz 75kHz 75kHz 200kHz 200kHz

Full scale analog output ................ 2V

Analog output drift ........................ <0-2% / 1 hour at constant temperature

Analog output offset ...................... <10mV

(5)

Analog output noise

Calibration accuracy ..................... <0.1% + 1% / calibration factor mantissa

.................. <0.1% + relative noise factor × calibration factor

mantissa

(6)

(6)

DC accuracy .................................... <0.2% + calibration accuracy

Analog output accuracy................ <0.3% + DC accuracy

Peak-to-Peak accuracy .................. <0.5% + DC accuracy + analog output noise / 2

Pulse accuracy ............................... <0.5% + DC accuracy + analog output noise / 2

Integration accuracy ..................... <0.7% + DC accuracy + analog output noise / 2

Display resolution.......................... full scale measurement / 2000

Minimum pulse slope .................... 10V / sec

Allowed detector responsivity limits:

2

Semiconductor .......................... 1 × 10

Thermopile ................................ 1 × 10

A/W to 1 × 10-8 A/W

5

V/W to 1 × 10-5 V/W

Pyroelectric ............................... 1 × 107 V/J to 1 × 10-3 V/J

(0)

Guaranteed after 30 min. warm up period.

(1)

Maximum measurable current is 10mA.

(2)

In Thermopile mode, ranges 1 & 2 are identical to 3 & 4.

(3)

Maximum measurable voltage in Thermopile mode is 2V.

(4)

Maximum measurable voltage in Pyroelectric is 200V.

(5)

Measured with 818-SL, 818T-10 or 818J-25 detector, respectively.

(6)

Calibration factor mantissa range is 1 to 10.

(7)

Amplifier bandwidths are higher internally.

x

Section 1

General Information

System Overview

1.1

The Model 1825-C is an accurate and flexible optical power and energy mea­suring instrument that provides features typically found only on advanced
single purpose optical meters: Simple front panel controls, annunciated digital
and analog displays, and compatibility with Newport’s full line of detector
families allow the Model 1825-C to meet almost any DC, AC peak-to-peak,
pulsed or integrated exposure measurement requirement with minimum fuss.
Compatible with Newport’s Low-Power, High-Power, and Energy detector
families, the Model 1825-C provides the features you need without the expense
of purchasing multiple single purpose optical meters. The Model 1825-C
Power/Energy Meter and its accessories are presented in Figure 1. Section 1.5
of this manual presents a brief description of compatible Newport detectors.

HIGH-POWER

818T-10
818T-10V
818T-30
818T-30V
818T-150
818T-150X
818T-300

ENERGY

818J-25Q
818J-50Q

818JA-YAG25
818JA-YAG50
818JA-NG254
818JA-NG504
818JA-NG251
818JA-NG504
818JA-9Q

818J-09
818J-09B
818J-25
818J-25B
818J-50
818J-50B

LOW-POWER

FP3-CA1
FP3-CA2
FP3-CA3
FP3-CA4
FP3-CA5
FP3-CA6

818-FA 818-

818-UV
818-SL
818-IR

FP3-FH1

FA2

818-ST

Scope of this manual

1.2

Needle Acc.±2% FS

Figure 1 — Model 1825-C and Accessories

Please carefully read this instruction manual before using the Model 1825-C
Power/Energy Meter. Be especially careful to observe the warnings and
cautions throughout this manual. If any operating instructions are not clear,
contact Newport Corporation.

This instruction manual contains the necessary information for operation and
maintenance of the Newport Model 1825-C Power/Energy Meter as well as
information for troubleshooting and obtaining service if necessary. This
information is divided into the following sections:

• Section 1 provides general information about this manual and the
Model 1825-C.

• Section 2 explains System Operation procedures for the Model 1825-C
and accessories.

1