Calibration - Siemens RAPIDLAB 248 Operator's Manual

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Calibration Gases
Two gas standards are used to calibrate the pCO
Cal Gas
Slope Gas
WARNING
damage and possible personal injury, observe the following precautions:
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Calibration

The 248 automatically calibrates using one of the following user-
selectable methods. Five minutes before a calibration is due a
countdown message appears on the Ready screen. Samples can still be
measured during this time.
Fixed Time
The 248 automatically calibrates at a specified time interval. The
interval is user-selectable, and can be 30 or 60 minutes. A 1 point
calibration is carried out at every interval. A full 2 point calibration is
carried out at every fourth interval.
For example:
When the interval is set to 30 minutes, the 248 automatically carries
out a 1 point calibration every 30 minutes, and a 2 point calibration
every 2 hours.
provides the calibration point for 1 and 2 point pCO
pO calibrations. Cal Gas contains 5.00 ± 0.05% carbon
2
dioxide and 12.00 ± 0.05% oxygen, balanced with
nitrogen and is NBS traceable.
provides the slope point for 2 point pCO
calibrations. Slope Gas contains 10.00 ± 0.05% carbon
dioxide balanced with nitrogen and is NBS traceable.
Compressed gas cylinders require careful handling. To prevent
Never drop cylinders, allow them to strike each other or subject
them to other strong shocks.
Secure cylinders to a wall or bench, or place in a cylinder base
support stand.
Never drag, roll or slide cylinders, even for short distances. Use a
suitable hand truck to move cylinders.
Never tamper with safety devices in regulators or cylinders.
Use these gases for the calibration of clinical and research
instrumentation only. US Law prohibits dispensing these gases for
drug use.
The contents are under pressure – do not puncture.
Do not use or store near heat or open flame.
Do not expose cylinders to temperatures above 54°C (130°F) as this
may cause the contents to vent or explode.
Never throw cylinders into fire or incinerators. Follow the disposal
instructions on the cylinders.
248 Operator's Manual
and pO sensors.
2 2
and
2
and pO
2 2