EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER Manual de Instruções descarregar pdf (Página 17)

Instruction Manual alpha-pH 1000

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 Measurement mode, push

the CAL key and scroll to Calibration Code “11”. Push the

ENTER key. The upper and lower display reads “CAL OrP”.

2) Note: If the upper and lower display read “CAL PH”, see

section 7.6.2 for procedures on how to switch from PH to

ORP mV readings.

3) 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%).

4) Place sensor in the high concentration sample (relative value

of 80%).

5) 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.

6) 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 the 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, push 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

OrP

SETUP

HOLD

C.1

HOLD

CAL

C.2

HOLD

CAL

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EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER Manual de Instruções Página 17