Molectron ENERGY MAX EM400 User manual

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USER MANUAL
EM400/EM500
Single-Channel Joulemeter

EM400/EM500 User Manual
August 2002
Published by
Molectron Detector, Incorporated
7470 SW Bridgeport Road
Portland, OR 97224
Phone: [phone] or 503.620.9069
Fax: [phone]
www.molectron.com
© 2002 by Molectron Detector, Inc. All rights reserved.
No portion of this publication may be reproduced in whole or in part in
any form or by any means without permission of the publisher.
Document Number: 0980-0191

Features & Description ................................................................................................. 1
Overview ......................................................................................................................................................... 1
Controls ............................................................................................................................................................ 2
Arrow Keys ................................................................................................................................................. 2
AVG Key ..................................................................................................................................................... 2
J/V Key ....................................................................................................................................................... 2
On/Off Switch .............................................................................................................................................. 2
Stat Key ....................................................................................................................................................... 2
Indicators .......................................................................................................................................................... 3
Audible Tuning ............................................................................................................................................ 3
AVG Indicator .............................................................................................................................................. 3
Battery Indicator .......................................................................................................................................... 4
DEV Indicator ............................................................................................................................................... 4
LCD Numerical Display ............................................................................................................................. 4
MAX Indicator .............................................................................................................................................. 4
MIN Indicator ............................................................................................................................................... 4
TRG Indicator .............................................................................................................................................. 4
Other Connectors ............................................................................................................................................ 5
AC Wall Adapter Connector ...................................................................................................................... 5
Analog Out Connector ................................................................................................................................ 6
Input BNC Connector ................................................................................................................................. 6
RS-232 RJ11 Connector ........................................................................................................................... 7
Table of Contents

Safety & Maintenance ................................................................................................... 8
Cautionary Statements & Precautions .......................................................................................................... 8
User Maintenance ........................................................................................................................................... 9
Service & Calibration ....................................................................................................................................10
Operation ...................................................................................................................... 11
A Typical Energy Measurement ................................................................................................................. 11
AUTO-OFF Feature ...................................................................................................................................... 11
Normal Mode ................................................................................................................................................. 12
J/V Selection ............................................................................................................................................. 12
Range Selection ....................................................................................................................................... 12
Calibration Set Function .......................................................................................................................... 13
Avererage Mode ............................................................................................................................................ 14
Average Pulse Set Function ................................................................................................................... 14
Range Selection ....................................................................................................................................... 14
Statistics Mode .............................................................................................................................................. 15
Statistics Batch Set Function .................................................................................................................. 15
Statistics Functions .................................................................................................................................. 16
Remote Operation ........................................................................................................ 17
Serial Port Parameters .................................................................................................................................. 17
ADC Data Format .......................................................................................................................................... 18
Commands..................................................................................................................................................... 19
Query Firmware Version ........................................................................................................................ 19
Query Full Scale Reading ...................................................................................................................... 20

Query Measurement Mode ..................................................................................................................... 20
Query Range ............................................................................................................................................ 20
Query Responsivity ................................................................................................................................21
Restore Default Setup .............................................................................................................................. 21
Set Joules Measurement ......................................................................................................................... 22
Set Range .................................................................................................................................................. 22
Set Responsivity...................................................................................................................................... 22
Set Volts Measurement ............................................................................................................................ 22
Start Data Transmission .......................................................................................................................... 23
Stop Data Transmission .......................................................................................................................... 23
Compatible Detectors & Ranges ................................................................................ 24
Frequently Asked Questions ...................................................................................... 25
Specifications .............................................................................................................. 27
Instrument Specifications .............................................................................................................................. 27
Display....................................................................................................................................................... 27
Ranges ...................................................................................................................................................... 27
Maximum Input Pulse Amplitude ........................................................................................................... 27
Minimum Input Trigger Level .................................................................................................................. 27
Maximum Rep Rate ................................................................................................................................27
Linearity ..................................................................................................................................................... 27
Accuracy ................................................................................................................................................... 27
Input Impedance ....................................................................................................................................... 27
Trigger Level ............................................................................................................................................. 27
Table of Contents
(cont’d)

Averaging .................................................................................................................................................. 27
Calibration Factors ................................................................................................................................... 28
EM500 Analog Output .............................................................................................................................. 28
Output Impedance ....................................................................................................................................28
Data Conversion Digital Resolution ....................................................................................................... 28
EM500 RS-232 Interface ......................................................................................................................... 28
EM500 RS-232 Baud Rate ...................................................................................................................... 28
EM500 RS-232 Parity .............................................................................................................................. 28
EM500 RS-232 Data Bits ......................................................................................................................... 28
EM500 RS-232 Stop Bits ......................................................................................................................... 28
Battery Life, EM400 .................................................................................................................................28
Battery Life, EM500 .................................................................................................................................28
EM500 Battery Recharge Time ............................................................................................................. 29
Battery AUTO-OFF timeout .................................................................................................................... 29
Dimensions................................................................................................................................................ 29
Weight, EM400 .......................................................................................................................................... 29
Weight, EM500 .......................................................................................................................................... 29
Factory Default Settings ............................................................................................................................... 29
Warranted Characteristics ............................................................................................................................ 30
Power......................................................................................................................................................... 30
Atmospherics ............................................................................................................................................ 30
Dynamics .................................................................................................................................................. 30
Emissions.................................................................................................................................................. 30
Susceptibility ............................................................................................................................................. 31

1
Features & Description
Overview
Thank you for purchasing a Molectron EM400/EM500. These devices are portable, battery-operated, single-channel
laser joulemeters for production line testing and field service applications. Microprocessor-based instruments, they are
designed to operate with Molectron's J25 and J50 series pyroelectric probes. The EM500 has an added computer interface
capability.
The EM400/EM500 is fast, accurate, and easy to use. It features a large 4-digit numeric display and an AUTO-OFF
feature to conserve battery life. It supports a wide range of user-selected calibration factors and a wide dynamic range of
inputs. It displays directly in energy units. The EM500 features a 3-wire RS232 interface, an analog output, an audible
tuning function, and an internal rechargeable battery. Both units include an AC adapter, which also charges the internal
battery of the EM500.
The EM400/EM500 has three operating modes:
• Normal mode displays the instantaneous energy of the laser on a pulse-to-pulse basis.
• Average mode calculates and displays a user-selected 2-99 pulse average.
• Statistics mode accumulates 2 to 9999 pulses and provides four kinds of numeric results (Average,
Minimum, Maximum, and Standard Deviation) for the accumulated set.

2
Controls
Press the key to select a higher range in Normal or Average mode or to increase the value in Set functions.
Press the key to select a lower range in Normal or Average mode or to decrease the value in Set functions.
Press and/or to select digits in Set functions, to select a computation function (Average, Minimum,
Maximum, or Standard Deviation) in Statistics mode, or to operate the Audible Tuning Function.
Press to enter Average mode and to perform averaging operations.
Press to enter Normal mode and its functions, and to switch the reading between Joules and Volts.
Slide to the right to power up the EM400/EM500.
Press to enter Statistics mode and to perform statistical operations.
Arrow Keys
AVG Key
J/V Key
On/Off Switch
STAT Key