VOLTCRAFT WM-500 Bedienungsanleitung Seite 22

4. Press and hold the
in.the.LCD..Once.flashing.stops.and."SA".(=."Save").and."End".(=.finish).appear.in.the.display,.the.device.will.
switch back to measuring mode.
5. Rinse the measuring electrode with clean water. Then dry the exterior surface of the electrode.
6. Immerse the measuring electrode into buffer solution pH 4.01 (alternatively pH 10.01), and then calibrate the
device as described under step 3.
7. Once calibration has been completed, the display will show "%" and the PTS value ("percentage of slope" =
inclination) of the electrode. If the reading is below 70% or above 130%, the measuring electrode must be
replaced. 100% is the perfect value.
If calibrating the device fails, "Err" will appear in the LCD. In such a case, remove the measuring electrode
from the buffer solution and rinse the tip of the electrode thoroughly with clean and clear water. Wipe the
measuring electrode dry.
Then perform a new calibration. Make sure the tip of the measuring electrode is fully immersed in the
buffer solution.
Always.make.sure.to.perform.a.calibration.with.the.buffer.solution.of.pH.7.first.and.only.then.perform.a.
calibration with the buffer solution of pH 4 (or alternatively with a buffer solution of pH 10, which is not
included in the delivery scope).
Buffer solutions other than those with a pH value of 4, 7 or 10 cannot be used for calibrating the device.
COND, TDS, Salt
1. Make sure to use the 3-in-1 measuring electrode. Remove the protective cap and moisturizing cap, and then
turn on the device using the
2. Press the Mode button and select the "COND" (conductivity), "TDS" or "Salt" (salinity level) mode.
3. Immerse.the.measuring.electrode.2-3.cm.into.the.1413.μS.standard.solution..Carry.out.a.few.stirring.
movements and wait for the reading in the LCD to stabilize. That can take up to 60 seconds.
4. Press and hold the
flashing.in.the.display..Once.flashing.stops.and."SA".and."End".appear.in.the.display,.the.device.returns.to.
measuring mode.
If calibrating the device fails, "Err" will appear in the LCD. In such a case, remove the measuring electrode
from the buffer solution and rinse the tip of the electrode with clear and clean water. Wipe the exterior
surfaces of the electrode dry. Then perform a new calibration. Check whether the tip of the measuring
electrode.is.fully.immersed.in.the.calibration.fluid.
When measuring liquids with very high conductivity, use a calibration solution of 12.88 mS/cm (not
included).
Calibration.solutions.with.conductivity.values.other.than.0.μS/cm,.84.μS/cm,.1413.μS/cm,.12.88.mS/cm.or.
80 mS/cm cannot be used for calibrating the device.
5. If.the.tip.of.the.measuring.electrode.is.not.immersed.into.a.fluid.and.if.the.display.does.not.show.0.μS/cm,.
perform.the.calibration.in.the.air,.without.fluid..To.do.so,.press.and.hold.the.
(approx..3.seconds),.until."CAL".(D).appears.and."0.μS/cm".starts.flashing.in.the.lower.area.of.the.display..Once.
the.calibration.has.been.completed,.the.LCD.will.show."SA".(=."Save").followed.by."End".(=.finish)..After.that,.the.
display.will.show.the.measured.conductivity.reading.(should.be.0.μS/cm.by.then!).
Briefly.pressing.the.
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/ CAL.button.for.3.seconds.to.switch.to.calibration.mode.."CAL".and."7.00".start.flashing.
/ CAL button.
/ CAL.button.for.3.seconds.to.switch.to.calibration.mode.."CAL".and."1413.μS".start.
/ CAL button allows you to cancel the calibration procedure early.
/ CAL button as described above