Hanna-instruments PCA 300 Series Manual de usuario descargar pdf (Pagina 32)

• If you want to store the new setpoint, promptly press

REC.MAX again. Display will show “Stor” for a short time

indicating that new setpoint is stored and will return to the

Chlorine concentration display.

• If you do not want to change

the setpoint, do not press

REC.MAX a second time.

The display will return to the

Chlorine concentration dis-

play and the setpoint will not

be changed.

RECORDER OUTPUT CALIBRATION

The PCA 300 and PCA 301 series of Analyzers are capable

of self-calibrating the voltage or current limits to ensure a 0-

1V output is truly 0-1V or 4-20 mA output is exactly 4-20

mA. This programmed capability eliminates the need for a

voltmeter or milliammeter for output calibration. Calibrating

the recorder output involves a two part procedure. First, a

coarse adjustment to set the voltage (follow step 1 below) or

current limit (follow step 2 below) is completed. Secondly a

fine tuning (step 3 below).

Step 1

If a voltage output has been selected as:

1 V (load > 50 kΩ)

100 mV (load > 5 kΩ)

10 mV (load > 500 Ω)

REC.

MAX

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Hanna-instruments PCA 300 Series Manual de usuario Pagina 32