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© 2003 Biomedx Page1 BIOMEDX BEV The Biomedx BEV is the premier electronic instrument for easily measuring the electrical parameters of liquid (water based) mediums. BEV is the acronym for Bio- Electronique Vincent. It was the hydrologist Professor Louis Claude Vincent who immersed himself into the concepts of identifying the “perfect” parameters for water within an environment. This could then be translated into knowing the parameters of water that were best for maintaining ideal health. In the 1950’s and 60’s Vincent published data showing why in certain areas of France there was a higher incidence of degenerative diseases like cardio vascular disease and cancer then there were in other areas. The reasons boiled down to the fact that the electrical properties of the water in the ill health districts were skewed away from the ideal electrical properties that really support health. Differences in chlorination practices, anionic and cationic mineral ratios and filtration all affect the measurable electrical characteristics of water. There is a healthy range, and the range above and below that which is not conducive for ideal health. You will note that water makes up most of the weight of the body and it is water that composes a most measurable “thing” of the body’s internal environment. Vincent reasoned that if it was the external water that we drink that has so much impact on the state of physical well being and that could be measured through electrical means, then it was reasonable to assume that the fluid of the body itself could also be measured and the amount of “skew” above or below an ideal would give reference to the body’s overall state of health. And so it is. “Therefore all cells live in essentially the same environment, the extracellular fluid, for which reason the extracellular fluid is called the internal environment of the body, the milieu intérieur, a term introduced more than a hundred years ago by the great 19th century French physiologist Claude Bernard. Cells are capable of living, growing and performing their special functions so long as the proper concentrations of oxygen, glucose, different ions, amino acids, fatty substances, and other constituents are available in this internal environment.” Textbook of Medical Physiology, Guyton 9th The Biomedx BEV can be a cornerstone for measuring the parameters of the internal environment of the body. This internal terrain of the body could be termed the biological terrain. It is hugely dynamic, immersed in chemistry and needless to say as a result, very much bio-electronic. The BEV measures these parameters and is one integral part of a larger “systems” approach to biological terrain testing. The basic BEV device instructions follow.

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© 2003 Biomedx Page1

BIOMEDX BEV

The Biomedx BEV is the premier electronic instrument for easily measuring theelectrical parameters of liquid (water based) mediums. BEV is the acronym for Bio-Electronique Vincent. It was the hydrologist Professor Louis Claude Vincent whoimmersed himself into the concepts of identifying the “perfect” parameters for waterwithin an environment. This could then be translated into knowing the parameters ofwater that were best for maintaining ideal health.

In the 1950’s and 60’s Vincent published data showing why in certain areas of Francethere was a higher incidence of degenerative diseases like cardio vascular disease andcancer then there were in other areas. The reasons boiled down to the fact that theelectrical properties of the water in the ill health districts were skewed away from theideal electrical properties that really support health. Differences in chlorination practices,anionic and cationic mineral ratios and filtration all affect the measurable electricalcharacteristics of water. There is a healthy range, and the range above and below thatwhich is not conducive for ideal health.

You will note that water makes up most of the weight of the body and it is water thatcomposes a most measurable “thing” of the body’s internal environment. Vincentreasoned that if it was the external water that we drink that has so much impact on thestate of physical well being and that could be measured through electrical means, thenit was reasonable to assume that the fluid of the body itself could also be measured andthe amount of “skew” above or below an ideal would give reference to the body’s overallstate of health. And so it is.

“Therefore all cells live in essentially the same environment, theextracellular fluid, for which reason the extracellular fluid is called theinternal environment of the body, the milieu intérieur, a term introducedmore than a hundred years ago by the great 19th century Frenchphysiologist Claude Bernard. Cells are capable of living, growing andperforming their special functions so long as the proper concentrations ofoxygen, glucose, different ions, amino acids, fatty substances, and otherconstituents are available in this internal environment.”

Textbook of Medical Physiology, Guyton 9th

The Biomedx BEV can be a cornerstone for measuring the parameters of the internalenvironment of the body. This internal terrain of the body could be termed the biologicalterrain. It is hugely dynamic, immersed in chemistry and needless to say as a result,very much bio-electronic. The BEV measures these parameters and is one integral partof a larger “systems” approach to biological terrain testing. The basic BEV deviceinstructions follow.

© 2003 Biomedx Page 2

BIOMEDX BEV - OVERVIEW

When you turn the BEV unit on it will first come up and state [bio-ELEC] for a few seconds andthen will generally go to an error code or to the last operating mode and buffer measurement.Once you complete the initial set-up, you can calibrate your probes and you’re ready to test.

Front Panel and Selector Keys

MODE = Selects all modes or escapes from error traps, calibration proce-dures, etc. by returning to the original mode.

CAL = Starts or proceeds a calibration or a function./\ \/ = Up/Down buttons for entering a value or for selecting a function.SET = Installs the meter settings according to your application.HOLD = Holds display when measuring.RES = Changes resolution/units of the display.PRINT = Displayed value is printed through the RS232 output.ON/OFF = Switches the instrument on or off.

Your first concern when installing a new unit is to plug the probes into the back of the unit, turn iton, go through the initial set-up procedure for your particular preferences, and then calibrateyour probes. Once calibrated, you cycle through each mode (ph, mV, rH2, conductivity/resistivity, etc.) by simply pressing the mode button successively.

Plug the pH probe into CH. 1, the ORP probe into CH. 2, and the conductivity probe into EC.Some conductivity probes may have two banana plugs for temperature but these will not beplugged in. It is best to use manual input at room temperature as the test solution will equilibrateto that temperature quickly. Ignore the REC and RS232 ports. Plug in the power supply to theDC jack.

NOTE: You will need to reference the pH and ORP instruction book for these probes as theyneed to be filled with KCI solution (potassium chloride gel) prior to using.

© 2003 Biomedx Page 3

The LED Display

You might note that the LED display does not form every character of the alphabet completelyso you have to do a little creative interpretation. You will see this as you view the pictures of theLED display as you review these instructions.

Error codes that can shown on the LED display

[Or. pH] = overrange pH[Or. mV] = overrange mV[Or. uS] = overrange uS[Or. MS] = overrange mS[Or. OhM] = overrange ohms[Or. Cn] = overrange concentration[Or.

oC] = overrange

oC

[Or. PPt] = overrange ppt (TDS)[Or.SAL] = overrange salinity[Or.%] = overrange %[no dAtA] = data-logging memory empty[not.CAL] = calibration procedure interrupted[Err.SLP] = slope not within 80... 120 %[Err.pHo] = ISO pH not within 6.. .8 pH[Err.cc] = cell constant not within 70...130% of the nominal value[Err. CAL] = calibration error[Err.Stb] = electrode not stable[not drY] = cell too wet for automatic capacitive compensation[diLutE] = solution too concentrated for a TC plotting[Err.EC] = no cell connected during a TC plotting[Err.

oC] = initial temperature too high (>10

oC) or no temperature probe connected

[Err.SAL] = salinity measurement error during 02-measurements

[Err.tC] = unprogrammed temperature-curve[Err.Cn] = unprogrammed concentration-curve[Err.COd] = invalid code[Err.COM] = general communication error[Err.MEM] = fatal memory error; have your instrument serviced![ILLEGAL] = an unauthorised person has failed to repair the unit; warranty is elapsed from

now on!

Manual Temperature ReferenceF to

C

67oF = 19.5

oC 73

oF = 23

oC

68oF = 20

oC 74

oF = 23.5

oC

69oF = 20.5

oC 75

oF = 24

oC

70oF = 21

oC 76

oF = 24.5

oC

71oF = 21.5

oC 77

oF = 25

oC

72oF = 22

oC 78

oF = 25.5

oC

© 2003 Biomedx Page 4

INITIAL SET-UP(This generally only needs to be done once when you first get your device.)

Setting the BEV unit for the ORP Reference Electrode

1. Press the SET button until the display shows [SEt rEF] and press CAL to enter the referencetype of the redox electrode [CALOMEL] or [AgCL]. We use AGCL. (The up/down arrow keyscycle through the available settings.) Press CAL to continue or SET to return.

2. The display shows e.g. [rEF=25oC]. Select the temperature (20.. .40

oC with up/down arrow

keys) to which all future measurements will be referred and press CAL.

Sample LED displays you might see.

Date

1. Press SET until the display shows [SEt dAtE] and press CAL.

2. The display shows [dAtE=on] or [dAtE=OFF]. Select mode (usually off) and press CAL.

3. Program the date (respectively year, month and day) by pressing CAL each time.

Sample LED displays you might see.

Time

1. Press SET until the display shows [SEt tiME] and press CAL.

2. The display shows [tiME=on] or [tiME=OFF]. Select mode (usually off) and press CAL.

3. Program the time (respectively hour, minutes and seconds) by pressing CAL each time.

Sample LED displays you might see.

Note the m in time looks like an n - this is due to the LED display.

© 2003 Biomedx Page 5

Temperature

1. When no Pt1000 temperature probe is connected to the instrument the display will show themanual temperature e.g. [C=23.7][MAn]. Shift to the proper temperature (using the up/downarrow keys) and press CAL.

For urine and saliva testing you will want to set the temperature to the temperature in the roomusing the manual mode.

2. For automatic mode, press SET until the display shows [SEtoC]. Select the desired mode

[Aut] and press CAL. (Auto mode will not be used unless you have a pt1000 temperature probewhich would then need to be put into each tested solution for proper reference.)

3. The display will show the measured temperature e.g. [oC=23.7][Aut]. If necessary, calibrate

your probe and press CAL. Press RES to reset the temperature calibration to the original factorycalibration.

Sample LED displays you might see.

Note how the letters are formed for MAn. This is the digital LED representation.

Keypad BEEP

1. Press SET until the display shows [SEtUP] and press CAL.

2. The display lets you choose between [bEEP on] or [bEEP OFF]. Decide whether or not thebeeper should sound each time the keyboard is touched and press CAL.

When the BEEP is turned on, it will also BEEP when a particular reading (pH, resistivity, rH2,etc.) “holds” steady for 4 seconds. Some individuals like this however, as temperature andother things shift in your test solution (urine or saliva for example), the BEEP is likely to sound anumber of times over a few minutes and you may likely get tired of hearing it so you may justwant to turn this off at that point or just turn the beep off at initial set-up.

NOTE: The display decimal point will blink when making a measurement and then will holdsteady when the measurement is stable. It responds like the beep but is silent.

Once you have done your initial set-up, you generally don’t have to go through the processagain unless you want to change some parameter. Then you just press SET repeatedly untilyou come to the parameter you want to change. For example, if you turn on the summer airconditioning and your room temperature is now a few degrees different from what is set in yourdevice, you can easily update the new manual temperature setting.

© 2003 Biomedx Page 6

The following feature sets are generally not used but available in [SEtUP].

3. The display lets you choose between [POWEr][on] or [POWEr][OFF]. Choose [POWEr][on]to inactivate the ON/OFF key (meter is always on and cannot be switched off). After aninterruption of the mains power, the meter will resume measurements automatically. Choose[POWEr][OFF] to activate the ON/OFF key (meter can be switched on or off). Press CAL.

4. The display shows e.g. [br=2400]. Pre-set the desired baud-rate (300.. .9600 b/s) and pressCAL. (only used when using computer recording software).

5. The display shows e.g. [rS=120]. Select the desired time interval (0...9999 s) between thetransmitted data (RS232). Pre-set to zero if no automatic printing is required and press CAL.

6. The display shows e.g. [Id.no=5]. Select the desired identification number (0.. .999) for yourmeter and press CAL. The instrument can be identified by e.g. a computer when a specificnumber is allocated to it. Pre-set to zero to ignore this number.

7. The display shows [Code on], [Code OFF] or [Code CAL]. Decide whether all future accessto the instrument should be by entering a code (on) or not (off). Press CAL. Select [Code CAL]to enter your personal code to avoid undesired access to the instrument. The display shows[E=------- ] while [=] is blinking. Enter your secret sequence of 5 keys to proceed. Press CAL.

The following are two more feature set parameters that are available but not generally used in aclinic setting, but might be used in a water treatment facility for continuous fluid monitoring andrecording.

Recorder

1. Press SET until the display shows [SEt rEC] and press CAL.

2. The display shows for all channels e.g. [rEc=PH1], [rEc=MV2], [rEc=Cnl], [rEc=Cn2],[rEc=EC], [rEc=dPH], [rEc=MG.LI, [rEc~%], [rEc=~C].. .etc. Select the desired mode and pressCAL.

3. This step is skipped unless [rEc=EC] has been chosen. Press CAL and the display showsthe conductivity measuring range and units, e.g. [rEc 0.01m5][Unit]. Select the desired rangeand press CAL.

4. The display shows e.g. [rEc=6.00][LoW]. Select the desired minimum level corresponding toa 0 V recorder output and press CAL.

5.The display shows e.g. [rEc=8.00][HiGH]. Select the desired maximum level corresponding toa 2 V recorder output and press CAL. The display shows [SEt rEc].

Alternating measurements

1. Press SET until the display shows [ALt] and press MODE to start the alternating mode. Thedisplay alternates between the selected modes with an interval of 4 s. Pressing PRINT in thismode will print all values of the selected channels.

2. Press MODE again to stop this mode and continue with the actual channel.

© 2003 Biomedx Page 7

CALIBRATING PROBES AND MAKING MEASUREMENTS

Note: Successively pressing the MODE key continually cycles you through each measurementof pH, mV, rH2, resistivity/conductivity, and microwatts.

pH is the measure of potential hydrogen or degree of acidity/alkalinity.mV is the direct ORP - Oxidation Reduction Potential in millivolts.rH2 is the standard BEV redox measurement of ORP combined with pH.

When in any of these modes, pressing the RES (RESolution) key will change the LED displayreadout accuracy to one, two or three decimal points depending on measurement.

When you cycle the MODE button to the next selection after rH2 appears on the LED display,you will be in conductivity/resistivity mode. Conductivity is the measure of conductance ofelectricity in the solution. When you are in this mode, pressing the RES key will cycle youthrough reading conductivity as micro or milli siemens, then as resistivity, then as PPM parts permillion, then as salinity. Press RES again and you are back to conductivity, press again you areat resistivity, press again PPM, etc. Individuals who are classical Vincents or BTA practitionerswill lean towards resistivity. Reams testers will lean towards conductivity. Individuals schooled inboth may desire both style readings.

uM microwatts is the power reading when all probes are in the solution to be tested.

NOTE: Before you can use the BEV meter with your pH and redox probes, youmust set the probes up for use, therefore…

READ THE INSTRUCTION MANUAL FOR THE IJ44 & IJ64 pH and REDOXELECTRODES. This should be with your probes or in the back pocket of thismanual’s binder. See the section entitled “Preparation” to properly prepare yourprobes for use.

pH measurement__________________________

1. Select the pH range by pressing MODE. The display will immediately show the measuredpH according to the previous standardization. Should you want to recalibrate, press CAL.

2. Rinse the electrode with distilled water, shake off excess water or pat dry, and then immerseit in the first buffer solution.

3. The display shows one of the 9 buffers in memory [b1] or the manual input [M1] of userspecified buffers, e.g. [b1=4.01] while [b1] or [M1] is blinking. Select the proper buffer and pressCAL. If you wish to change the manual buffer, first press RES to reset to the proper value andthen press CAL.

4. The instrument shows the measured buffer and will standardize automatically whenreadings are stable ([=] stops blinking). If the buffer has a different temperature, compensate theindicated value manually. Your buffers should be at room temperature and your BEV should bemanually set at that temperature which would have been done during [setup].

5. Go on in the same way with all the next buffers (b2.. .b5) and always press CAL or pressMODE to start the measurements immediately. (For clinic applications you can do a two point

© 2003 Biomedx Page 8

calibration around pH 4 and pH7 which would be the general range of urine and saliva.)

6. After rinsing the electrode with distilled water, (you can shake off excess water or pat dry)and then immerse it in the samples and read the pH value from the display.

7. Rinse the electrodes always with distilled water after use and store them in a 3...4M KCIelectrode/probe storage solution.

A blinking decimal point warns you for unstable measurements. Wait to read the display! Ifyou have the BEEP function turned on, the unit will beep after a stable reading is reached for 4seconds.

Stirring the solution during the measurements promotes the homogeneity and is thereforealways recommended.

pH Probe maintenance notes:

A pH electrode is active and stable only after wetting! For this purpose it must be immersed forat least ten hours in a 3...4 M KCl solution (this is your basic electrode storage solution includedwith your supplies. During short interruptions (e.g. whenever you are not going to be using it andfor storage) the electrode should be immersed in a 3...4 M KCl solution. In doing this it is alwayskept ready for use. When the interruption is longer than a month, refill the closing cap with 3...4M KCI and plug it on the electrode tip in order to protect the glass bulb. Before use, ensure thatthe reference part of the electrode is topped up with a 3...4 M KCI gel solution.

Refer to the probe instruction manual!

© 2003 Biomedx Page 9

mV measurement__________________________

We use the ORP/REDOX probe to calibrate the millivolt reading. The raw ORP reading inmillivolts is used in conjunction with the pH reading to ascertain the rH2 value. During thetesting process clinicians will usually skip past the mV reading (by pressing MODE to go to thenext measurement) because it does not mean much unless it is in reference to pH. However, itdoes need to be calibrated.

If you are want to read raw mV (which you will need to do for calibration):

1. Select the mV range by pressing MODE.

2. After rinsing the electrode with distilled water, put the tip of the probe into the solution to bemeasured and read the display.

Note: When reading something other then the calibration buffer, you will get afast reading but it may tend to drift for awhile. This is due to electron activity andthe specific dwell time for the probe which needs to be taken into account. Ourtesting with the IJ64 probe in relation to the other biological terrain devices in themarket (Baltimore Labs, Medtronic, etc.) tells us that 2 minutes is a good point toread the mv/rH2 for parity with those devices.

3. Rinse the electrode always with distilled water after use. The electrode should be stored in a3...4M KCI solution.

Calibration :

1. Select the mV range by pressing MODE.

2. Press CAL to adjust the mV scale to any particular reference solution. Immerse theelectrodes in a standard solution of known potential - like 200 mV ORP.

3. The display shows e.g. [MV=208.3] with equal sign blinking. Adjust to the proper value [200]with the up/down arrows and press CAL again and/or jump right to MODE. Your display will nowread 200MV or to whatever number you have calibrated.

When in CALibrate mode pressing RES resets the absolute readings.

When in ORP mV mode & reading mV, press RES to change the resolution from 1 to 0. 1 mV.

When in ORP mV mode and reading mV, press the up or down arrows to switch between mVreadings referred to a standard hydrogen electrode [MV.H] or not [MV]. If you see MV.H pop upon your display, the arrow key was likely pressed and simply press an arrow key again to returnto standard mV reading.

© 2003 Biomedx Page 10

rH2measurement__________________________

1. Select the rH2range by pressing MODE.

2. After calibrating and rinsing the pH and redox electrodes with distilled water, shake off theexcess water and/or pat dry, then immerse BOTH probes into the solution to be measured andread the display.

Note: Because of the dynamics of biological samples, a continual drift of ORP will occur withvarious dwell times occurring as the measurement drifts. A precise ORP/rH2 measure istherefore difficult to ascertain in a biological sample. We have found that to meet parity withexisting clinical meters that are computer driven and known as BTA devices, a measurementtaken at the two minute mark most closely correlates with those other meters.

It is very important to understand that as soon as an ORP probe is in the solution to bemeasured, the countdown to two minutes begins and then the measurement is taken.

To get rH2 you MUST have the pH in the sample at the SAME TIME at the two minute mark.The pH probe will lock onto a value in 5 to 15 seconds so that does not require two minutes, butthe ORP probe does.

Not paying attention to this time factor for ORP measurement is one reason wide variations inmeasures have been found to exist in the computer driven BTA meters. If a sample fluidtouches the probe but the “test” button is not pushed in a consistent timeframe for every test,consistent results will be difficult to obtain.

You will note that the standard probes that come with the BEV unit take a verysmall sample size. The pH and ORP probes are pencil point like probes and astandard eppendorf/micro caplet tube with a few drops of solution can be placedsecurely over the probe tips very easily.

So let’s say you are measuring two water samples. You could put some drops ofyour sample into two micro caplet tubes, insert the pH and ORP probes, suctionup a few drops of the sample into the conductivity probe, and within about twominutes you would have each parameter measured by simply pressing theMODE key and cycling through the readout. While this is happening you couldfill two more micro caplet tubes with your second sample, and when ready, rinsethe probes from the first sample, and immediately proceed to the second. Withinjust a few minutes you have the complete BEV parameters on two samples.

© 2003 Biomedx Page 11

Conductivity measurement__________________________

1. Select the conductivity range by pressing MODE (the display shows [uS] or [mS] for microsiemens and milli siemens).

2. After rinsing the electrode with distilled water and then with some of the sample, suction upsome of the sample into the probe. (Only the slightest pressure is required on the suction bulb.)

3. Read the display. The auto ranging feature gives you the largest possible number of digits +their unit of measurement.

4. Rinse the electrode always after use. You can store it dry overnight or when not being usedfor extended periods. At the beginning of the work day you can suck up some distilled water orelectrode storage solution for 30-60 minutes prior to the days use and then store it wet for theday. This keeps the soft platinum spongy electrodes primed for use. (If using the electrodestorage solution you must rinse with distilled water and then shake out before taking a sample.)

Calibration:

(Remember that as you go through the calibration procedures you should have yourtemperature manually set at your room temperature and the fluids you are testing andcalibrating at should also be at this room temperature.)

1. Select the conductivity range by pressing MODE (the display shows [uS] or [MS]) and pressCAL.

2. The display will show the cell constant from the prior calibration (such as [cc=8.50]).

The cell constant is particular to any given electrode.

Press CAL again to start the automatic determination procedure.

3. The display will show one of the KCI standard solutions in memory. You must choose one tocalibrate your probe (using the up/down arrows) based upon the calibration standard you areusing.

[St=0.01M] [cc1] is equal to (1413 uS/cm) – (the calibration standard for water testing.),[St=0.1M] [cc1] is equal to (12.88 mS/cm),[St=1M] [cc1] is equal to (111.8 mS/cm),or the manual input [St=MAn].

We generally supply 7.00mS/cm (7mS) calibration standard so you would choose [St=MAn] andproceed to step 4.

IMPORTANT NOTE: 10,000 microsiemens [uS] = 10 millisiemens [mS]. Whengoing from micro to milli the decimal point is moved three places to the left.

When the display reads uS it can only go to 2000uS. So, if we are manuallycalibrating at 10,000uS, the display should read 10.00mS.

© 2003 Biomedx Page 12

If we are manually calibrating at 7,000uS, the display should read 7.00mS, etc.

4. . The display shows something such as [MS=20.00][cc1] while the = is blinking.

You must now choose the desired calibration range between 1.000 (units), 10.00 (tens) or 100.0(hundreds) (using the up/down arrows). As you press the arrow keys the decimal point will moveand you will change from micro uS reading to milli mS reading. PAY ATTENTION TO THEDISPLAY. KNOW THE DIFFERENCE BETWEEN MICROSIEMENS uS AND MILLISIEMENSmS. The displays shown here are reading in mS. Note how it is formed. Microsiemens on theother hand will read uS =. You do not want this because you are calibrating in mS.

Once you have set the proper uS or mS scale (as shown directly above), press CAL.

5. Now you must press the arrow keys again and the numbers on the display will change soyou can set the exact number required that matches the calibration standard you are using. Fora 10.00mS calibration standard the display should read;

If you were calibrating at 7.00mS the display should read ms= 7.00

Press CAL again.

The display will momentarily read;

And then the display shows something such as [cc1=8.47][cc1] while the [=] is blinking.

As soon as calibration is set the display will read;

The unit is now asking you to input the second calibration point [cc2].

You could have up to a three point calibration if you would like but we are normally onlycalibrating at a 10mS or a 7mS point which is between where saliva and urine generally is goingto be. If you were calibrating a second point you would select the desired standard value (cc2and cc3 at real temperature noting that the second and third points should be at least 5 timesstronger than the previous one). Since we are only calibrating the one point, press MODE tonow read conductivity. The next display you see should be a very close reading of yourcalibration standard (shown here when 10mS was the standard used for calibration).

© 2003 Biomedx Page13

A blinking decimal point warns you for unstable measurements. Wait to read the display! Ifthe beep is turned on the unit will beep when stable measurement is reached.

Stirring the solution prior to sucking it up the conductivity probe for the measurementpromotes the homogeneity and is therefore always recommended.

Press RES to switch between ppm (parts per million Total Dissolved Solids), SAL (salinity),S/cm (siemens [mhos] conductivity) or ohms/cm (ohms = resistivity).

In resistivity mode, the display might read something like [107 E0]. The E means you arereading R or resisitivity in ohms (which is the reciprocal of conductivity which is mhos). E0 is adirect reading in ohms (Vincent’s practitioners would say you have an R value of 107). Urineand saliva will always come up as E0 and will be read directly as R. When the meter reads E3 itis reading resistance in kohms and E6 is Mohms.

Capacitive compensation:

I. Capacitive compensation increases accuracy in the very low conductivity ranges (<10uS/cm). Verify if the attached electrode is completely dry.

2. Select the conductivity range by pressing MODE (the display shows [uS] or [MS]) and pressCAL.

3. The display will show the cell constant (e.g. [cc=1.073]), [COMP.on] or [COMP.OFF]. Select[COMP.on] and press CAL to start the automatic capacitive compensation. The display willshow [WAit] for a while.

Probe Maintenance:

A conductivity cell is active and stable only after wetting! For this purpose it is good to keep itwet in distilled water for 30 or 60 minutes prior to use. Rinse the cell always after use in distilledwater. You can store it dry over night or for extended periods of time (months/years).

A polluted cell (the platinum electrode wires) may be cleaned with a soft detergent or dilutednitric acid. This is done by squishing the solution in and out and just storing the probe in thesolution for a short while. DO NOT PUT ANY CLEANING TOOL INSIDE THE PROBE TO RUBTHE ELECTRODE WIRES. The wires have a spongy platinum coating and rubbing themmanually will wipe the platinum off.

Microwatt measurement__________________________

1. Select the uW range by pressing MODE.

2. After calibrating and rinsing the pH, ORP and conductivity electrodes with distilled water,immerse them in the solution to be measured and read the power. When the display reads E6this is uW (microwatts), E3 is mW (milliwatts), and E0 is W (watts).

© 2003 Biomedx Page 14

Additional items on the BEV unit that are generally not used in a typical clinic setting.

Recorder output

A recorder can be connected to the red (+) and black (-) terminals. Use only laboratory recorderswith a high input impedance!

Digital output

A standard RS232 output terminal (DP9) is provided for interfacing the instrument with a printeror computer. Data is sent in the ASCII code at a BAUD rate of 150...4800 bps (8 bit, no parity, 1stopbit).

Serial port pinout specifications:

pin 1 : connected to pin 4 and pin 6 pin 2 : TxD, transmit data pin 3 : RxD, receive data pin 4 :connected to pin 1 and pin 6 pin 5 : Gnd, signal ground pin 6 : connected to pin 1 and pin 4 pin7 : connected to pin 8 pin 8 : connected to pin 7 pin 9 : not connected

© 2003 Biomedx Page 15

Specifications

Ranges

pH -2...+l6pH

mV ±2000 mVrH

20.. .42 rH

2

uW 0.. .400000 uW

Conductivity

cc = 0.1 cm’ 0.001 uS/cm ... 20 mS/cm

cc = 1 cm’ : 0.01 uS/cm ... 200 mS/cm

cc = 10 cm’ :0.1 uS/cm ... 2000 mS/cm

Resistivity

cc = 0.1 cm’ :100 ohms.cm ... 200 Mohms.cm

cc = 1 cm’ :10 ohms cm ... 20 Mohms.cm

cc = 10cm’ :1 ohms.cm ... 2Mohms.cm

TDS

cc = 0.1 cm’ :0.01mg/I ... 20 gIL

cc = 1 cm’ :0.01mg/I ... 100 g/L

cc = 10 cm’ :0.1 mg/I ... 100 gIL

Salinity 0 ... 70 pptoC 0 ... 100

oC

Resolution: 0.1/0.01/0.001 pH, 1/0.1 mV, 0.01 rH2, 0.C, 0.01/0.001 uS/cm, 1 .cm, 1% ion, 0.1/0.01 mg/I

Inputs: 1 BNC input for pH, 1 BNC input for mV, 1 BNC input for a conductivity cell

1 BANANA input for a Pt1000 temperature probe

Temp. Comp.: automatic with Pt1000 or manual

Digital output: programmable RS232, 150...4800 b/s, for bi-directional communication with a computer or printer

Analogue output: 0.. .2 V, ca 8 k~, programmable 8 bit DAC

Display: 8+4 digit/character, 13 mm LED display

Keys: 9 tactile membrane keys

Ambient temp.: 4...40C

Rel. Humidity: 0.. .90 % (non-condensing!)

Power supply: 9 volt DC input to BEV unit.

Cabinet:: P65 cabinet

Dimensions: 260 x 180 x 90mm

Weight: 1 kg