Hach Ultra ORBISPHERE 3625, Руководство оператора

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3625 Package Analyzer - Calibrations 69 of 90
Operator Manual
ORBISPHERE
•
× Ø
enter the absolute pressure of CO
2
(or N
2
) in the calibration gas, plus
barometric pressure (4 bar + 1.013 bar, in this example);
ENTER
• × Ø move decimal point;
ENTER
The instrument will follow the same procedure as detailed in previous section (fraction
calibration).
7.6.3 Dissolved Calibration with CO
2
Calibration Kit
Dissolved calibrations exposes the CO
2
sensor to a known source of dissolved CO
2
using the Orbisphere calibration kit part numbers 32313 or 32314.
The system checks for 3 calibration cycles (20 sec. each) within a CO
2
sensor output
range of 1%. The reference value is entered at the end of the procedure as the operator
needs to know the liquid temperature of the reference sample being used, which will be
shown by the analyzer.
Preparation
Please follow the instructions supplied with the calibration kit to prepare a CO
2
reference
sample.
Increase the forcing gas pressure of the piercer according to the CO
2
calibration kit table
(included with the kit). Set the forcing gas pressure to 1 bar above the value shown in the
column
Pressure
and which corresponds to the ambient temperature.
Procedure
•
ESC
displays main menu
• × Ø select
CALIBRATE
;
ENTER
• × Ø select
CO2
;
ENTER
• × Ø select
DISSOLVED
;
ENTER
• × Ø select
CAL KIT
;
ENTER
• × Ø select the appropriate concentration unit;
ENTER
• Pierce the package;
ENTER
• Lower the sampling tube
• The analysis starts automatically and the display shows temperature,
measurement cycle number and the gas concentration (
GC
)
• At the end of the analysis the display shows the message
Raise tube
;
ENTER
• When prompted for
Cal kit CO2 value
, enter the concentration shown in the
calibration kit table (water column) corresponding to the temperature shown by the
instrument;
ENTER
Note:
During the whole procedure the
ESC
key can be pressed to abort the calibration
procedure. The maximum number of cycles is 7.
At high ambient temperatures (above 25ºC) the calibration kit bottle is at a high CO
2
pressure. Remove the piercer lever carefully to avoid splashing.
Table 7-3:
Calibration Kit Part Numbers
Part No. Description Contents
32313 Starter kit, high level 1 reusable calibration bottle, 1 cap adapter, 32314 refill kit,
instructions and calibration table
32314 Refill kit high level
10 x tubes of CaCO
3
powder, 10 x flasks of diluted citric acid,
10 x metal caps