ETS-Lindgren HI-4455 User Manual

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Archived 4/2/10

HI-4455

Isotropic Field Probe

User's Manual

Declaration of Conformity

ETS-Lindgren, L.P. 1301 Arrow Point Drive Cedar Park, TX 78613 USA

Declares that the HOLADAY product described in this instruction manual is in compliance with: EN EMC Directive 86/336/EEC, EN50082-1, EN55011

ETS-Lindgren, L.P.

(Formerly Holaday Industries, Inc.)

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ETS-Lindgren L.P., reserves the right to make changes to any product described herein in order to improve function, design, or for any other reason. Nothing contained herein shall constitute ETS-Lindgren L.P. assuming any liability whatsoever arising out of the application or use of any product or circuit described herein. ETS-Lindgren L.P. does not convey any license under its patent rights or the rights of others.

permission from ETS-Lindgren L.P.

EMAIL & INTERNET ADDRESSES

support@ets-lindgren.com

http://www.ets-lindgren.com

USA

1301 Arrow Point Dr., Cedar Park TX 78613 USA

P.O. Box 80589, Austin, TX 78708-0589 USA

Tel 512.531.6400

Fax 512.531.6500

FINLAND

Mekaanikontie 1, 27510, Eura, Finland

Tel 358.2.838.3300

Fax 358.2.865.1233

JAPAN

4-2-6, Kohinata

Bunkyo-ku

Tokyo 112-0006 JAPAN

Phone + 81 3 3813 7100

Fax + 81 3 3813 8068

CHINA

1917-1918 Xue Zhixuan Building

No 16 Xue Qing Road

Haidian District

Beijing Postcode: 100083 CHINA

Phone + 86 010 82755304

Fax + 86 010 82755307

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REVISION RECORD

HI-4455, MANUAL, Part #600076

Revision Description Date

Initial Release November,

1997 A Changed Charger Specs August, 1999 B Changed Area Code February,

2000 C Changed Dynamic Range spec March, 2001 D Revised August, 2005

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Table of Contents

1. Introduction .......................................................................... 7

HI-4455 Specifications .......................................................................... 9

2. Getting Started .................................................................. 11

Unpacking and Acceptance ................................................................ 11

Probe .................................................................................................. 11

Battery Charging ................................................................................. 13

3. Operation ........................................................................... 15

System Theory .................................................................................... 15

Probe Operation.................................................................................. 17

Probe Power Supply ........................................................................... 18

Application Considerations ................................................................. 19

4. Maintenance ...................................................................... 21

Maintenance Recommendations ........................................................ 21

Upgrade Policies ................................................................................. 21

Return Procedures .............................................................................. 21

Periodic/Preventive Maintenance ....................................................... 22

Parts Information................................................................................. 23

5. Limited Warranty .............................................................. 25

6. Appendix A: HI-4455 Error Codes ................................. 27

Probe Error Output ............................................................................. 27

7. Appendix B: HI-4455 Operating Protocols .................. 29

Communication Protocol ..................................................................... 29

Information Transfer Protocol ............................................................. 29

Command Structure ............................................................................ 29

Commands .......................................................................................... 31

8. Appendix C: Series 491198-36 Battery Fast Charger

Manual ......................................................................................... 33

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1. INTRODUCTION

The HI-4455 is a battery-operated broadband Isotropic Electric Field Probe designed for use in making RF exposure measurements in the vicinity of broadcast facilities and industrial RF sources. Applications include: Health and Safety monitoring, measuring microwave transmitters and antennas, EMI monitoring, and measuring the fields generated by ISM equipment. This probe uses optical isolation to minimize field perturbation during measurements.

The HI-4455 probe assembly consists of a conical casing, containing the sensor, which is mounted on one end of a shaft; the other end of the shaft is attached to an extrusion that houses the electronics (Figure 1). The sensor and electronics housing operate-and are calibrated-as a unit.

The HI-4455 measures the field strength in each of three axes. It performs a vector addition calculation on the readings and sends the resultant to the receiver via a fiber optic cable. Frequency response of the HI-4455 is 200 kHz to 40 GHz; dynamic range is 2 to 300 Volts per meter (V/m).

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Figure 1: HI-4455 Probe

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HI-4455 SPECIFICATIONS

Dynamic Range: 2 to 300 Volts/meter (V/m) Ranges: 10, 30, 100, 300 V/m

full scale

Frequency Response: 27 GHz to 40.0 GHz ± 3.0

Linearity: ± 0.5 dB full scale (F.S.): ±

Isotropicity: ± 1.2 dB Average Overload: Environmental: Operating Temperature: 10 °C to 40 °C

Humidity: 5% to 95% relative

Fiber Optic Cable Connectors: Battery: 3.6 VDC, 1400 mA-h

Battery Charger: 115/230 VAC, Battery Life: 17 Hours continuous (full Probe Mount: ¼ - 20 UNC tapped hole

Size: Length

Probe diameter: 102 mm (4.0 in) Weight: 0.54 Kg (19 oz) Optional Equipment:

200 kHz to 26 GHz ± 1.5 dB

dB 2 least significant bits

(LSBs) of A/D converter

6 times full scale (each range)

Standard FSMA

rechargeable NickelCadmium (NiCd)

approximately 1 hour charge) (internal thread) in base of

probe (including electronics

housing):

See Table 2

(50 °F to 104 °F) humidity, non-

condensing

432 mm (17.0 in)

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2. GETTING STARTED

UNPACKING AND ACCEPTANCE

Step 1. Upon delivery of your order, inspect the shipping container(s) for evidence of damage. Record any damage on the delivery receipt before signing. In case of concealed damage or loss, retain the packing materials for inspection by the carrier.

Step 2. Remove the probe from its shipping containers. Save the boxes and any protective packing materials for future use.

Step 3. Check all materials against the packing list to verify that the equipment received matches what was ordered. If you find any discrepancies, note them and call ETS-Lindgren Customer Service (+1.512.531.6400) for further instructions.

Be sure that you are satisfied with the contents of your order and the condition of your equipment before installing the probe.

PROBE

A switch, two fiber optic connectors and a battery charger connector are mounted on the HI-4455 electronics housing (Figure 2).

XMIT/RCV

The fiber optic cable assembly from the receiver is attached to the probe via two connectors. The cables are color-coded: white for XMIT, yellow for RCV. Identically colored dots are located on the electronics housing adjacent to these connectors. Be sure that each cable is attached to the proper probe connector.

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Figure 2: Switch and Connectors

When the fiber optic cables are not attached, always cover the probe connectors with the protective plastic covers supplied with the unit, or with similar material. This prevents dirt or other contaminants from entering the connector and causing communication problems.

ARM/OFF

The ARM/OFF switch activates and deactivates the probe. In the ARM position, the probe is powered by its internal 3.6 VDC NiCd battery: in the OFF position, the probe is inactive. To prolong battery life, set the ARM/OFF switch to OFF at the end of a test sequence or when the probe is not in use.

Charger

A standard fast charger is supplied with the HI-4455. When charging is complete, the fast charger acts as a trickle charger. The battery can be left on this maintenance mode indefinitely and its performance will not degrade.

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Battery

The NiCd battery provides up to 17 hours of probe operation when fully charged.

BATTERY CHARGING Introduction

Each HI-4455 probe contains a rechargeable nickel-cadmium (NiCd) battery. A fully-charged battery (nominal output voltage of 3.6 VDC) provides up to 17 hours of continuous operation.

NOTE: ETS-Lindgren charges the internal NiCd battery of the HI-4455 at the factory in order to calibrate the probe prior to shipment. While every effort is made to ensure that your probe arrives ready to use, we cannot guarantee that this will be the case. Always check the condition of the battery prior to making any measurements. To check probe battery voltage, refer to the operation of the Field Monitor or ProbeView software User's Manual.

Charging Procedure

Step 1. Plug the charger into a suitable AC source. Step 2. Set the probe switch to OFF. Insert the plug on the charger

cable into the probe's CHARGER jack. Step 3. The battery is now charging. This may take approximately 1

hour, depending on how deeply the batteries are discharged. When charging is complete, the charger automatically goes into a trickle charge and will continue to do so until the probe is disconnected.

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Battery Tips

NiCd batteries have several characteristics that can affect both their performance and operating life. The following tips advise you how to take advantage of these characteristics to get the most out of your probe’s battery.

• Although NiCd batteries are rated for operation in temperatures from -20 EC to +65 EC (-4 EF to +140 EF), operating the probe in extreme temperatures will reduce operating time significantly. The optimum operating temperature range for these batteries is +20 EC to +30 EC (+68 EF to +86 EF).

• The battery in the HI-4455 probe does not require periodic "deep discharges" to reverse the capacity depleting "memory effect" caused by repeated shallow discharges; however, undercharging can reduce battery capacity. Therefore, after the charging procedure is complete, be sure that the battery is fully charged before resuming field operation.

• If the battery exhibits low terminal voltage during charging, or if it appears unable to acquire or maintain an appreciable charge, individual cells in the battery may be shorted or damaged. If, for any reason, your battery needs replacement, contact ETSLindgren Customer Service for assistance.

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3. OPERATION

This section discusses the theory of operation and the functions of the HI-4455 Isotropic Field Probe. A high-level block diagram (Figure 3) is included to aid the discussion. The objective is to provide information enhancing user understanding of the design of this probe.

SYSTEM THEORY

The HI-4455 Broadband Isotropic Electric Field Probe utilizes a microprocessor for intelligent operation and control. The probe's selfcontained power supply employs a 3.6 VDC NiCd battery, which provides up to 17 hours of continuous operation.

For each axis, the probe measures the radio frequency signal level and generates a linearized reading of the measurement. A vector addition is performed on these three readings: the result is transmitted to the readout over glass fiber optic cables. See "Probe Operation" for a more detailed explanation of the functioning of the HI-4455.

The probe relays data to the readout via either a short form or long form output word. See Appendix B for details on both output word formats.

For some limited, specialized applications, you may use any computer with an RS232 serial port to communicated directly with the HI-4455 via ETS-Lindgren’s optional HI-4413P Fiber Optic/RS232 Interface.

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Figure 3: Operation Block Diagram

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ETS-Lindgren HI-4455 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual