Aquaprobe
®
AP-700, AP-800 & AP-2000 Instruction Manual
10401-00870 Rev R
One step process:
Weigh out 10.5mg of the recommended salt and add to 1L of deionized water in a
volumetric flask. Invert or mix until all salt has dissolved. This gives the Pt-2 10ppm stock
solution required for calibration.
Two step process:
Step 1:
Weigh out 1.05g of the recommended salt and add to 1L deionized water in a
volumetric flask. Invert or mix until all salt has dissolved. This gives a 1000ppm stock
solution.
Step 2:
Transfer 10ml of the 1000ppm stock solution to a 1L volumetric flask and top up
with 1L of deionized water. Invert 10 times. This step results in a 1 in 100 dilution of the
1000ppm stock giving the 10ppm standard required for Pt-2 calibration.
The dilute solution can be stored in a dark bottle in a refrigerator for up to five days. After
that time it must be discarded.
Important note:
When calibrating the Refined Oil sensor with naphthalenedisulfonic acid
disodium salt, the readings given will be in μg/L (ppb) naphthalene. In order to display
readings with respect to a specific type of refined oil, it is necessary to prepare a 10ppm
solution of the target oil type and use that to calibrate the electrode in place of the
naphthalene solution. Alternatively, apply a suitable Grab Sample Factor to correct the
naphthalene readings for the target oil type.
16.10.7.
Zero Point Calibration
To calibrate the zero point, follow these steps:
1. Pour 300mL of clean water (bottled still mineral water is recommended) into a clean
calibration bottle, remove the storage cap from the pH electrode if fitted, wash the
Probe in clean water, then gently lower the Probe in all the way.
The Sleeve End
Cap must be fitted
.
2. Switch the Aquameter
®
on and wait until the temperature and Oil readings are
stable. If the Oil reading is very high, there are probably air bubbles adhering to the
lenses.
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.
Calibration
RapidCal
DO 100%
Full Cal
5. Select
Full Cal.
The screen will change to:
Calibration
pH/REDOX(ORP)
DO/EC
Aux Electrodes
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®
Ltd.
www.aquaread.com
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