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Macro 900 Operation Manual
15.2.6.
Zero Point Calibration
To calibrate the zero point, follow these steps:
1. Fill a calibration bottle with distilled water, remove the storage cap from
the pH probe if fitted, wash the Probe in distilled water, then drop the
Probe in all the way. The Sleeve End Cap and Plug must be fitted.
Bang the Probe against the bottom of the bottle several times in order to
remove any air bubbles that may be clinging to the probe.
2. Switch the Macro 900 Meter on and wait until the temperature and BGA-
PC readings are stable. If the BGA-PC reading is very high, there are
probably air bubbles adhering to the lenses. Bang the Probe against the
bottom of the bottle to remove.
3. Ensure the temperature of the solution is between 5ºC and 40ºC (41ºF -
104ºF).
4. Press the MENU key then select Calibration. The following screen will be
displayed.
5.
Select Full Cal. The screen will change to:
6.
Select Aux Probes. The screen will change to:
The BGA-PC probe should have been assigned to AUX socket 1
when it was fitted. Press the OK or right arrow key to select BGA-
PC. The screen will change to:
© 2013 Palintest Ltd.
Calibration
MacroCal
DO 100%
Full Cal
Calibration
pH/ORP
DO/EC
Aux Probes
SELECT PROBE
1:BGA-PC l 4:N/A
2:EMPTY l 5:N/A
3:N/A
l 6:N/A
CALIBRATE BGA-PC
Pt-1? [01/Jan/12]
Pt-2? [01/Jan/12]
www.palintest.com
V3
Page 62 of 147
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