Hanna Instruments PCA 300 Series - Manual (Page 32)

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• 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 k
Ω
)
100 mV (load > 5 k
Ω
)
10 mV (load > 500
Ω
)
REC.
MAX