EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER Instrukcja Obsługi Pobierz pdf (Strona 18)

6.3 ORP – % Calibration

The ORP % mode allows you to calibrate at two points: a low concentration sample (20%) and a

high concentration sample (80%).

To calibrate the controller for ORP %:

1) Enter Calibration mode. While in the Measurement

mode, press the CAL key and scroll to Calibration

code “11”. Press the ENTER key again. The upper

and lower display reads “CAL OrP”.

NOTE: If the display reads “CAL pH”, see section 7.6.2

for procedures on how to switch from pH to ORP mV

readings.

2) Press the ENTER key to begin calibration. The

“CAL” indicator appears on the display. The upper

display shows “80”. The lower display shows “C1”

(=calibrated value 80%).

3) Place sensor in the high concentration sample

(relative value of 80%).

4) Press the ENTER key to confirm the value. The

electrode indicator and CAL indicator flash. The unit

automatically adjusts its reading to match the

solution value.

5) The display will now show ‘20’ and ‘C2’. Remove the

electrode from the first standard, wash it well and

then immerse it in the 20% standard. When the

display stabilises, press the ENTER key. The ‘CAL’

indicator flashes and the controller adjusts its display to the 20% relative value and exits to

Measurement mode.

Note: If there is a calibration error, the controller displays “ERR”, and it will not automatically return

to Measurement mode. If this happens, press the ▲ and ▼ keys simultaneously (escape) to

restart the calibration beginning from step 1.

Note: If you stop calibration after entering the first value, or if calibration is defective, the controller

will use its original calibration data.

CAL

SETUP

HO LD

SETUP

HO LD

C.1

SETU P

HO LD

C.2

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EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER Instrukcja Obsługi Strona 18