ETS-Lindgren FP5000 User Manual

Archived 4/2/10

HI-4422/FP2000/

FP4000/FP5000

Isotropic Electric 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.

written 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-4422/FP2000/FP4000/FP5000, Manual, Part #600054

Revision Description Date

Initial Release July, 1993 A Revised August, 1994 B Changed Battery Charger June, 1997 C Added CE Label June, 1997 D Revised January, 1998 E Changed Charger Specs August, 1999 F Changed Area Code February, 2000 G Revised July, 2005

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Table of Contents

1.0 Introduction .............................................................. 7

Specifications ........................................................................... 8

2.0 Getting Started ........................................................ 9

Acceptance and Controls ......................................................... 9

Probe ........................................................................................ 9

CHARGER ............................................................................. 10

Battery .................................................................................... 11

Battery Charging .................................................................... 11

3.0 Operation ............................................................... 13

System Theory ....................................................................... 13

Application Considerations ..................................................... 17

4.0 Maintenance .......................................................... 19

Maintenance Recommendations ............................................ 19

Upgrade Policies .................................................................... 20 

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

Periodic/Preventive Maintenance ........................................... 21

Parts Information .................................................................... 22

5.0 Warranty Policy for Electromagnetic Isotropic

Field Monitoring Components ...................................... 23

Scope and Duration of Warranties ......................................... 23

Warranty Exclusions ............................................................... 24

Buyer’s Remedies .................................................................. 25 

6.0 Appendix A: Error Codes ................................... 27

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

7.0 Appendix B: Operating Protocols ..................... 29

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

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

Command Structure ............................................................... 30 

8.0 Appendix C: Battery Charger Manual .............. 33

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1.0 INTRODUCTION

The HI-4422/FP2000/FP4000/FP5000 is a battery-operated broadband radio frequency (RF) isotropic electric field probe designed for a variety of applications including broadcast facilities, industrial RF source and electro magnetic compliance (EMC) testing.

The HI-4422/FP2000/FP4000/FP5000 probes are fully intelligent sensor enabling fast and accurate EMF measurements with industry-leading performance specifications. Optical coupling to a variety of readout options makes this probe ideally suited for a wide range of field monitoring applications. The HI-4422/FP2000/FP4000/FP5000 probes are excellent tools for electric field mapping, RADHAZ measurements and EMC field monitoring.

Figure 1:

The basic HI-4422/FP2000/FP4000/FP5000 probes are shipped complete with a 10 meter fiber extension cable, a carrying case, battery charger and connectors for extending the optic cable.

HI-4422/FP2000/FP4000/FP5000

Electric Field Probe

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The HI-4422/FP2000/FP4000/FP5000 probe measures field strength in each of three axes. It performs a vector addition calculation on the readings and sends the result to the receiver via a fiber optic cable. Data from each axis can be viewed individually, or can be combined. Frequency response of the HI-4422/FP2000/FP4000/FP5000 is 10 kHz to 1 GHz; dynamic range is 1 to 300 Volts/meter (V/m).

SPECIFICATIONS

Dynamic Range Ranges Frequency Response

Linearity Isotropicity

Overload Withstand Environmental Operating Temp

Environmental Humidity Fiber Optic Cable Connector Battery

Battery Charger Probes

Probe Mount Weight

Optional Equipment

1 to 300 Volts/meter (V/m) 10, 30, 100, 300 Volts/meter full scale 10 kHz to 250 MHz ± 0.5 dB

250 MHz to 1.0 GHz ± 1.0 dB ± 0.5 dB full scale (F.S.): ± 2 least significant bits (LSBs) of A/D converter ± 0.5 dB 1000 Volts/meter maximum, all ranges 10 °C to 40 °C (+50 °F to +104 °F) 5% to 95% relative humidity, noncondensing Standard FSMA

3.6 VDC, 1400 mA-h rechargeable Nickel-Cadmium (NiCd) 115/230 VAC, approximately 1 hour 64 mm (2.5 in) cube with probe shields on three sides ¼ - 20 UNC tapped hole (internal thread) in base of probe

0.4 Kg (14 oz.) See Table 2

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2.0 GETTING STARTED

ACCEPTANCE AND CONTROLS 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 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 that, which was ordered. If you find any discrepancies, note them and call ETS-Lindgren Customer Service for further instructions.

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

PROBE

signing. In case of concealed

installing the probe.

A switch, two fiber optic connectors and a battery charger connector are mounted on the HI-4422/FP2000/FP4000/FP5000 probe housing (Figure 3-1).

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XMIT/RCV

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

Figure 2: Switch and Connectors

When the 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 and other contaminants from entering the connector, causing communication problems.

ARM/OFF

The ARM/OFF switch activates and deactivates the probe. In the ARM position, its internal 3.6 VDC NiCd battery powers the probe: in the OFF position, the probe is inactive. To prolong battery life, set this switch to OFF when the probe is not in use.

CHARGER

A standard fast charger is supplied with the HI-4422/FP2000/FP4000/FP5000. When charging is complete, the fast charger acts as a trickle charger. Battery performance will not degrade, regardless of how long it is on the trickle charger.

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BATTERY

The NiCd battery provides up to 40 hours of probe operation when fully charged.

BATTERY CHARGING

Each HI-4422/FP2000/FP4000/FP5000 probe contains a rechargeable nickel-cadmium (NiCd) battery. A fully-charged battery (nominal output voltage of 3.6 VDC) provides up to 4m,asghjkl89asghjkl890 hours of operation. When the battery has discharged to 3.3 VDC, the probe is still operational, but its battery needs charging: when the voltage drops below 3.18 VDC, measurement accuracy will be compromised by further operation.

NOTE: ETS-Lindgren charges the internal NiCd battery of the HI-4422/FP2000/FP4000/FP5000 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 probe's battery prior to making any measurements. To check probe battery voltage, refer to the operation of the BAT keypad in Section 8.0 of the HI-4416 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°C to +65°C (-4°F to +140°F), operating the probe in extreme temperatures will reduce operating time significantly. The optimum operating temperature range for these batteries is +20°C to +30°C (+68°F to +86°F).

• The battery in the HI-4422/FP2000/FP4000/FP5000 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 ETS-Lindgren Customer Service for assistance.

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3.0 OPERATION

This section discusses the theory of operation and the functions of the HI-4422/FP2000/FP4000/FP5000 Isotropic Electric Field Probe. A high-level block diagram (Figure 4) is included to aid the discussion. The objective is to provide information that enhances the user's understanding of the design of this probe.

SYSTEM THEORY

The HI-4422/FP2000/FP4000/FP5000 Isotropic Electric Field Probe utilizes a microprocessor for intelligent operation and control. The probe's self-contained power supply employs a 3.6 VDC NiCd battery, which provides up to 40 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 resultant is transmitted to the receiver over glass fiber optic cables. The probe provides data to the readout via either a short form or long form output word. See Appendix B for details on both output word formats.

PROBE OPERATION

Receiver commands to the probe consist of the following:

! Send reading ! Read battery voltage ! Zero ! Set sleep timer ! Change range ! Read temperature !Enable/disable axis

The signal flow within the probe is shown in the block diagram.

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Figure 4: Probe Block Diagram

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To measure field strength, three sets of mutually orthogonal monopole antennas are used to provide an isotropic response to the ambient field. The probe uses two antennas per axis—one each for high and low frequencies—to receive RF signals. The signals are fed to a Schottky diode detector (low frequency signals are pre-amplified first). After filtering and amplification, the high and low frequency signals generated by each axis (a total of six signals) are fed into the multiplexer.

The microprocessor instructs the multiplexer to look at each of the six axis signals sequentially. A time-division output signal from the multiplexer is fed into the programmable gain stage.

The programmable gain stage provides the required amplification factors for the high and low frequency signals on each range. The system uses four ranges (10, 30, 100, and 300 V/m): each range requires both a high and low frequency gain setting—eight amplification factors in all.

For example, assume the probe is making measurements using the 100 V/m range. When the multiplexer selects the low frequency X axis signal, the microprocessor directs the programmable gain stage to use the appropriate amplification factor for this signal. This process is repeated for the next signal sample (X high) as well as for the four remaining axis signals. The output of the gain stage feeds the multiplexed front end of the analog-to-digital (A/D) converter.

After stepping through all six axis signals, the microprocessor commands the multiplexed A/D front end to read the battery voltage and temperature sensing lines. An entire A/D cycle, therefore, consists of eight readings.

The eight readings from the A/D converter are input to the microprocessor, which performs a vector sum calculation on the X, Y and Z channels. This data is transmitted to the receiver.

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PROBE POWER SUPPLY

A sealed rechargeable 3.6 VDC NiCd battery, which drives both the analog and digital power supplies, powers the probe; the HI-4422/FP2000/FP4000/FP5000 employs separate power sources to provide isolation between the analog and digital circuitry. With the probe switch in the ARM position, voltage from the battery is applied to the power switch. This switch routes the battery voltage to the power supply, enabling the microprocessor. A timer circuit controls the power switch. The timer monitors the fiber optic connector input line to determine whether the probe has received a command during a specified period (several seconds). If no command is received during this period, the timer signals the power switch to disable the power supply and the microprocessor. In essence, the probe goes dormant to conserve battery power: only the fiber optic input circuitry remains active in order to detect new commands. When the next command from the receiver reaches the probe, power is reapplied automatically and the processor is reactivated, "waking up" the probe.

NOTE: The probe uses volatile random access memory (RAM). If, for any reason, power to the probe is lost, the probe must be re-zeroed.

ZEROING

When the receiver sends a zero command, the probe must be in a zero field environment. This is because the zero command causes the multiplexer (via the processor) to perform a normal read cycle on all axis signals. This procedure is executed for all 24 ranges (four ranges, three axes per range, two antennas per axis). When the processor receives all the zero-field signal values, it stores them in a special register; these values are subtracted from all subsequent measurements. Therefore, a probe that is zeroed while it is not in a zero field environment will give erroneous readings.

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ETS-Lindgren FP5000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual