Extech Instruments Exstik EC500 Bedienungsanleitung Seite 12

Changing Measurement Function
The meter can be set to measure PH, Conductivity, TDS or Salinity.
To change the mode:
I. Press and Hold the MODE/HOLD button for 3 seconds and the display will begin to
scroll through the units.
vS (Conductivity);PH;ppm S (Salinity):ppm (TDS); mg/l (TDS);
Noto: The "HOLD" function cannot be on when changing the measurement function. If
"HOLD" is displayed in the lower left comer of the display, briefly press the MODE/HOLD
button to turn it off.
2. When the desired units are displayed, release the MODE/HOLD button.
TDS Compensation Ratio
The TDS value is determined by multiplying a conductivity reading by a known ratio
factor.The meter allowsfor selecting a conversion ratio in the range of 0.4 to 1.0.The
ratio varies with the application. but is typically set between 0.5 and 0.7.
Note: The stored ratio witl briefly appear in the lower temperature display when the meter
is first turned on, or when changing measurement function to TDS.
Note: In the Salinity mode tho ratio is fixed at 0.5.
To change the ratio, while in the TDS measurement mode (ppm or mg/l):
1. Press and release the CAL/RECALL button
The stored ratio will appear in the display.
2. Press the MODE/HOLD button to increase the ratio value in steps of
0.1.
3. When the desired ratio is displayed, press and release the
CAL/RECALL button to store the value and retum
mode.
4. If no buttons are pressed for 5 seconds, the meter retums to measure mode.
Storing Readings
I. Press the MODE/HOLD button to store a reading. The storage
location number will be displayed on the lower display, white the
main display shows the stored reading. The meter will enter the
HOLD mode and the "HOLD" indicator will appear.
2. Press the MODE/HOLD button again to exit the HOLD mode and
return to normal operation.
If more than 25 readings are stored, previously stored readings
3.
(starting with number I) will be overwritten.
twice in succession.
to the normal
L_g-dS
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Recalling Stored Readings
Press the CAURECALL button and then press the MODE/HOLD button.A location
I.
number(I through25)will brieflyappearandthenthe valuestoredin thatlocationwill
appear. T hedisplayed unitsWill f lash,indicating thatthestoragerecallmodeis active.
Thelast storedreadingwillbedisplayed first.Pressing andreleasing the MODE/HOLD
2.
buttonwill scroll through the stored readings one at a time. The location number is
displayedfirst, followed by the readingstored in that location.
To exitthe storagemode,presstheCAURECALLbuttonandthe meterwillreturnto
3.
normal operation,after displaying"END".
Clear Stored Memory
Withtheuniton,pressandholdONIOFFfor 4 seconds."cld' willbe brieflydisplayed
when the memory is cleared.
Changing Temperature Units
To changethe displayed temperature units(ocor OF):
I. With the unit OFF, press and hold down the CAWRECALL button.
2. With the CAURECALL buttondepressed momentarilypress the ON[OFF button.
When"SELFCAL"appearsin thediSpIay release the CAWRECALL button.Theunit
will power on with temperature displayed in the new units.
Data Hold Mode
Press the MODE/HOLD buttonto hold (freeze) a reading in the display. The meter will
enter the HOLD mode and the "HOLD" indicator will appear.
Note: This also stores the reading.
Press the MODE/HOLDbutton again to retum to normal operation.
Auto Power OFF
The auto power off feature automaticallyshuts the meter off 10 minutes after the most
recent button press.
Auto Power OFF Disengage Feature
To disable the Auto Power Off feature:
1. Turn the unit on
2. Press CAURECALL once (Quickly)
3. Immediatelyandsimultaneouslypress the MODE/HOLD and ONIOFF buttons for
approximately2 seconds,until "oFP' is briefly displayed
To disengage this feature, turn the unit offwith the ONIOFF button. The next time the unit
is powered up, Auto Power OFF mode will be engaged again.
Low Battery Indication
When the batteries become weak the "BAT" icon will appear in the display. Refer to the
Maintenance section for battery replacement information.
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