ECD L20 Скачать руководство пользователя страница 8

 

Operational Procedures 

A. Buffer Set Selection 

The Model L20 meter has two buffer sets: 7.00, 4.01, 10.01pH and 6.86, 
4.00, 9.18 pH. The meter is factory pre-set at 7.00, 4.01 and 10.01 pH. To 
change the buffer set, turn off the unit, then press and hold the “Stand” 
key while turning on the unit again.  

[Note: There is no need to repeat this procedure every time the unit is 
power up unless one decides to change the buffer settings.] 

B. pH Calibration 

The Model L20 uses 2-point or 3-point calibration. The first point must be 
6.86/7.00, and the second point can either be 4.00/4.01 or 9.18 / 10.01. 

a.  Calibration with an ATC/Temp probe in the pH-AUTOLOCK mode 

1.  Turn the unit on. Press “Clear” key for 2 seconds, all LCD elements 

will light up. The meter clears all calibration values stored in internal 
memory. 

2.  Connect the pH electrode to the BNC connector and the ATC/Temp 

probe to the ATC/Temp connector of the unit: “ATC” icon will light 
up. “pH” icon and “AUTO” icon light up. The buffer set icon will flash. 

3.  Rinse the pH and ATC/Temp probes in distilled water and immerse 

them  in  the  first  buffer  solution  (either  7.00  or  6.86).  Allow 
temperature reading to stabilize, then press and hold “Stand” key 
for 5 seconds to calibrate. The “WAIT” icon will flash until the unit 
detects a stable reading. Once the unit calibrates the first point, the 
selected buffer remains lit up while the remaining two buffers start 
to flash. The unit is ready to be sloped at the second buffer. 

[Note:  If  the  first  buffer  solution  is  7.00  or  6.86,  at  this  moment, 
press the “Mode” key. The unit will exit the calibration mode. Single 
point calibration is complete. If the first buffer solution is 4.00, 4.01, 
9.18 or 10.00, at this moment, the unit will automatically exit the 
calibration mode. Single point calibration is complete.] 

4.  Rinse the pH and ATC/Temp probe in distilled water and immerse 

them in the second buffer solution (either 4.00/4.01 or 9.18/10.01). 
Allow  temperature  reading  to  stabilize,  then  press  “Slope”  key to 
calibrate. The “WAIT” icon will flash until the unit detects a stable 

Содержание L20

Страница 1: ...Model L20 Instruction Manual Microprocessor based pH ORP Temperature Bench Top Meter Electro Chemical Devices Inc 1500 N Kellogg Dr Anaheim CA 92807 USA Telephone 1 714 695 0051 www ecdanalytical com...

Страница 2: ...Display 3 B Keys 4 Operational Procedures 5 A Buffer Set Selection 5 B pH Calibration 5 a ATC Temp probe pH AUTOLOCK mode 5 b Manual temperature compensation pH AUTOLOCK mode 6 c ATC Temp probe pH NON...

Страница 3: ...NON AUTOLOCK mode 10 d Manual temperature compensation pH NON AUTOLOCK mode 10 D Temperature Measure 10 E mV Measurements 10 a mV AUTOLOCK mode 10 b mV NON AUTOLOCK mode 11 pH Calibration Buffer Tabl...

Страница 4: ...displays pH or mV and temperature simultaneously along with user prompts and mode indicators The unit prompts the user through calibration and measurement procedures An AUTOLOCK feature for both pH an...

Страница 5: ...he AC 3 adaptor supplied with the instrument to make sure that the AC line voltage is correct If the wrong AC adaptor is supplied notify your ECD representative immediately Installing the Batteries Th...

Страница 6: ...ors 9 LOCK This will indicate that the reading is frozen during AUTOLOCK mode 4 mV Unit and mode indicators 10 EFF This will be displayed if the user is viewing the efficiency of the electrode It is r...

Страница 7: ...event accidental erasing stored memory When the Clear key is pressed all segments of the LCD will be on After about 2 seconds the unit will enter the pH AUTO mode The AUTO and CAL will be on and one o...

Страница 8: ...light up pH icon and AUTO icon light up The buffer set icon will flash 3 Rinse the pH and ATC Temp probes in distilled water and immerse them in the first buffer solution either 7 00 or 6 86 Allow tem...

Страница 9: ...splay the new electrode efficiency b Calibration with manual temperature compensation in the pH AUTOLOCK mode 1 Turn the unit on Press Clear key for 2 seconds all LCD elements will light up The meter...

Страница 10: ...ld Stand key for 5 seconds to calibrate the unit immediately calibrates the first point the selected buffer remains lit up while the remaining two buffers start to flash The unit is ready to be sloped...

Страница 11: ...up Press Mode key until pH icon is on The buffer set icon will flash 3 Rinse the pH probes in distilled water and immerse it in the first buffer solution Adjust the temperature reading to that of the...

Страница 12: ...obe by shaking or stirring the probe 4 Press the Mea key The WAIT icon will start flashing The unit is waiting for a stable reading The display will track the pH value as sensed by the pH electrode an...

Страница 13: ...ectrode to the BNC connector of the unit The MAN icon will light up 2 Repeat steps 2 4 of Measurement with an ATC Temp probe in the pH NON AUTOLOCK mode D Temperature Measure The L20 can measure tempe...

Страница 14: ...TOLOCK In this case use the pH NON AUTOLOCK mode for measurements b Measurement in the mV NON AUTOLOCK mode 1 Connect the optional combination ORP electrode to the BNC connector of the unit 2 Press Mo...

Страница 15: ...00 10 01 0 4 01 6 98 9 46 4 01 7 11 10 32 5 4 00 6 95 9 39 4 01 7 08 10 25 10 4 00 6 92 9 33 4 00 7 06 10 18 15 4 00 6 90 9 28 4 00 7 03 10 12 20 4 00 6 88 9 23 4 00 7 01 10 06 25 4 00 6 86 9 18 4 01...

Страница 16: ...not correct pH electrode slope is off by more than 30 of ideal slope Allow sufficient time for the electrode and ATC Temp probe to stabilize re press Slope key to continue the calibration procedure Ch...

Страница 17: ...range 0 C to 60 0 C pH Electrode Offset recognition 100 mV at pH 7 00 or 108 3 91 7mV at pH6 86 pH Electrode Slope recognition 30 at pH 4 00 4 01 9 18 and 10 01 Input Impedance 1012 Temperature senso...

Страница 18: ...ment shall be limited to a refund in the purchase price or at ECD s discretion to the repair or replacement of any product that proves upon ECD s examination to be defective when returned to the facto...

Страница 19: ...16...

Страница 20: ...1500 N Kellogg Dr Anaheim CA 92807 USA Phone 1 714 695 0051 www ecdanalytical com E0219...

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