5
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Analyzer Hardware Configuration and Calibration
30
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Orion 2295 Phosphate Analyzer
Thermo Scientific
Section
Section
The sequence starts with a priming step to allow fluid to purge the air from the tubing. The user
may respond as soon as ready. The prime step will stop after 60 seconds. The next step prompt
asks the user to be prepared to collect the water in a measuring cylinder. This step must be
allowed to complete and is timed at 60 seconds to allow the user to enter the volume collected in
60 seconds (or 1 minute). If the measured volume amount is not entered within 90 seconds, the
pump calibration procedure is aborted.
Upon successful completion of the pump calibration procedure, the user has the choice to
calibrate the remaining pumps or to edit the calibrated values.
Analog Outputs Calibration
The analyzer has two isolated analog outputs. The outputs are rated 0/4-20mA with a maximum
load of 900 ohms. They can be independently calibrated.
From the MAIN MENU, follow the sequence:
MENU
➔
SERVICES
➔
HARDWARE SETUP
➔
CALIBRATE ANALOG OUTPUTS
The user is asked to connect a 900 ohms resistor to each two analog outputs. The calibration
requires the use of a current meter (0–100 mA range) placed in series with the output under test.
The user may select one output at a time for calibration. The calibration starts by adjusting the
full scale to 20 mA. The -/+ buttons are used to adjust the output to 20 mA. The instrument waits
for the user to confirm the calibration by pressing ENTER. If there is no user response within
90 seconds, the analog output procedure calibration is aborted.
Upon successful calibration of one of the analog outputs, the user has the choice of calibrating
the second analog output.
The calibrated values for the analog outputs are not available for editing. For testing the
calibrated outputs use:
MENU
➔
SERVICES
➔
DIAGNOSTICS
➔
ANALOG OUTPUT
➔
CHANNEL –1:
By pressing ENTER the user may select the signal level from the following settings:
0, 4, 10, 12, and 20 mA
