measurements
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1. tT PHARE Twinning Poland Lodz PL April 14 18 2008 Page 8 20 The standard kit includes the following items Model HI 3702 Clamp On Current Sensor with cushioned case HI 4416 Digital Readout Control Unit with Fiber Optic Cable 491198 36 Standard Fast Charger 115 230 V User s Manual Fitted Carrying Case Optional accessories for the unit for recording and downloading data Belt Pac Readout Control Unit Case HI 4413G RS232 Serial Communication Adapter HI 3320 Datalogger T PHARE Twinning Poland Lodz PL April 14 18 2008 Page 9 20 Clamp On HI 4416 Digital Readout Fiber Optic Cable 491198 36 Charger PHARE Twinning Poland Lodz PL April 14 18 2008 Page 10 20 TECHNICAL SPECIFICATIONS Frequency Response 9 kHz to 110 MHz 2 0dB Current dynamic range 1mA 1A 0 5 dB At lower levels the linearity for Range 1 deviates Linearity within 0 5 dB due to noise The other ranges follow the ideal curve as shown on the graph Relative Humidity 5 to 95 non condensing Operating Temperature 10 C to 40 C Operating ranges Autorange 1 00 mA 1 000 A Range 1 Range 3 Range 4 3 lt 00 oe PHARE Twinning Poland Lodz PL April 14 18 2008 Page 11 20 SPECIFICATION frequency response HI 3702 Typical Frequency Response 1E 3 1E 2 1E 1 1E0 EJ Frequency MHZ PHARE Twinning Po2. worst case For each sample location height the value to consider is displayed on the reader Selective Meter EHF Probe Software Data must be taken with the appropriate acquisition parameters filter If no other sources are the room the value to consider is the peak corresponding to the device operating frequency 27 12 MHz tT PHARE Twinning Poland Lodz PL April 14 18 2008 Page 16 20 Example of Torso Measurement Grid 3 front view ia top view I Example of Head Measurement Grid nli mm PHARE Twinning Poland Lodz PL April 14 18 2008 Page 17 20 ee Ol Con id RESULTS how to verify the compliance In order to verify the compliance the therapist usually moved all around the room and the exposure levels are different the following parameter must be determined For Induced current the square root of the time weighted square mean of the values of the current in any limb over a total of 6 minutes period 1 6min I dt 2 For the E H field the average square mean of the values obtained moving the probe in the points as in the suggested grid tT PHARE Twinning Poland Lodz PL April 14 18 2008 Page 18 20
3. AR head and trunk limbs W kg W kg W kg Shortwave diathermy 27 12 MHz 0 4 10 20 Microwave diathermy 2 45 GHz 0 4 10 20 Reference values action values Electric field Magnetic field Limb induced V m ALN rrent mA 61 0 16 100 Microwave diathermy 2 45 GHz 137 0 36 Shortwave diathermy 27 12 MHz Action values must be averaged over a 6 minutes period T PHARE Twinning Poland Lodz PL April 14 18 2008 Page 4 20 Measurement Procedure Worker Exposure Assessment What to measure E field measurements with Broadband Meter Induced current measurements with Clamp on H field measurements broadband should also be performed we are not in far field region e Explorato reliminary measurements around the place where the equipment is located to avoid inadvertent burnout and to detect_other possible sources Several location of measurements should be considered Values must be averaged over a 6 minutes period A grid of points should be realized at the worker location PHARE Twinning Poland Lodz PL April 14 18 2008 Page 5 20 Se TW gt 2 A Xr id Measurement Procedure Worker Exposure Assessment Induced current measurement 1 Induced current measurements should be performed on several persons with different height and morphological characteristics 2 Two different parameters at least for one person induced current in the an
4. Q 4 Ir GD 2 eg me l GD l j lL eg Q las v a fi a L a t L IQ S 1 z C la t l Io l gt Lg 4 e l gt I E eg We lt lt Ve a L i G l gt Training on the use of modern control equipments for verification of EMF environmental assessment DIATHERMY Holaday HI 3702 Andrea Barellini Andrea Zari Lucia Ardoino a barellini arpat toscana it a zari arpat toscana it lucia ardoino apat it 00 A PHARE Twinning Poland Lodz PL April 14 18 2008 Page 1 20 PART IT DIATHERMY Source Measurement procedure Measurement Devices Clamp on HI 3702 and Narda EHP200 probe laptop tT PHARE Twinning Poland Lodz PL April 14 18 2008 Page 2 20 SOURCE SHORTWAVE DIATHERMY SIGNAL f 27 12 MHz CW gt XK 11lm CHARACTERISTICS Max Power 300 500 W gt typical used Power 100 W capacitive inductive electrode EXPOSURE reactive region gt the field is highly inhomogeneous very high field strength can occur near electrodes power supply cables and connections can result in serious injury or death to patients with implanted devices with leads tT PHARE Twinning Poland Lodz PL April 14 18 2008 Page 3 20 Basic restrictions and reference values Basic restrictions Whole body Localized SAR Localized SAR Diathermy equipment Averaged S
5. he ranges until Range A appears on the display ZEROING pushing the ZERO key T PHARE Twinning Poland Lodz PL April 14 18 2008 Page 14 20 OPERATING INSTRUCTIONS 3 3 SET THE DATA COLLECTION RATE select X for Instantaneous Readings or Y for One Second Averaging The HI 3702 collects a measurement approximately seven times per second The averaging algorithm stores the seven most recent measurements Each time a measurement is taken the algorithm drops the oldest value adds in the new value then recalculates the average and sends the new average value to the display Step 5 Place the Clamp on on the arm Place the clamp on current sensor on the arm or leg of the Body Under Test and close the buckle It is important that nothing interferes with complete closure of the clamp on sensor Be sure that no pieces of clothing get caught The Meter will record 150 s of data before filling the memory Step 6 Read Stored data Use Prev and Next keypads to scroll stored data 150 data points tT PHARE Twinning Poland Lodz PL April 14 18 2008 Page 15 20 i Measurement Procedure Worker Exposure Assessment Y E and H field measurement It is important that the probe is mounted on its own support Broadband meter E and H probes Several location spot measurements at various heights A grid of points should be realized at the worker location
6. kle and induced current in the arm with hand in contact with the apparatus This last measure following prEN50413 CENELEC standard 5 3 3 is related to the contact current which is flowing into the hand in contact with conductive objects 3 Several measurements points should be considered for example touching consolle touching electrodes patient proximity behind the electrodes 4 Choose level of emitted power max of the real used power Tt PHARE Twinning Poland Lodz PL April 14 18 2008 Page 6 20 THE INSTRUMENT Clamp on Induced Current Meter HI 3702 with HI 4416 readout e Frequency response 9 kHz 110 MHz e Dynamic range afewmA 1A F Hi 3702 with Clamp on probes designed for induced BE i4416 Readout currents can also be used for contact currents but not in the lower part of the frequency span i EI PHARE Twinning Poland Lodz PL April 14 18 2008 Page 7 20 The probe consists of a core of ferromagnetic material which when closed forms the core of a transformer of which the wiring passing through the clamp is the primary winding The instrument contains a secondary winding of many turns By measuring the current induced in this secondary winding and taking account the characteristics of the transformer and the frequency and waveform of the current being measured the size of the current flowing through the conductor can be determined
7. land Lodz PL April 14 18 2008 lt 00 A Page 12 20 OPERATING INSTRUCTIONS 1 3 Step 1 Charging batteries It is recommended that the batteries be charged to maximum capacity using the standard fast charger before any measurements are taken Ni Cd batteries will self discharge to nearly zero capacity after only 2 months The battery charger provided with the unit requires approximately 1 hour to fully charge the battery Under normal operation a fully charged battery should provide 5 hours of operation Clamp on If the battery fails to hold a charge or if a significant degradation in operational time occurs the battery may need replacement Step 2 Connecting cable Connect the fiber optic cable to both the HI 4416 and the HI 3702 both the devices are OFF LO O SE SC eoo PHARE Twinning Poland Lodz PL April 14 18 2008 Page 13 20 OPERATING INSTRUCTIONS 2 3 Step 3 Switch ON Switch ON the HI 3702 The HI 3702 is equipped with a locking lever on off switch This lever must be pulled out before toggling it to the appropriate position Switch ON the HI 4416 readout Step 4 Use the HI 4416 unit Details of operating the HI 4416 are documented in the HI 4416 Manual Use Mode Select key to move the cursor to select any function RANGE select the range that is appropriate for the expected current levels to be measured To select autorange scroll through t
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