GE Eagle 1000, Инструкции по обслуживанию

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GE Medical Systems EAGLE 1000
Page 27
Information Technologies
Servicing Instructions 227 468 01 Rev. G
2.1.10 Temperature
Signal input
Input isolated from ground (type CF according to IEC 601-1) for connection of a tempera-
ture probe from the Marquette HELLIGE accessory range (these probes conform to the
YSI 400 or Exacon 4000 series; as these probes have jack plug contacts which are acces-
sible when not connected, they were additionally tested with 1500 V
rms
50 Hz in physiologi-
cal saline according to IEC 601-1)
Signal processing
Together with two test readings and a correction value the temperature reading is proces-
sed for regular self-tests and for fine-balancing by multiplexing in a common amplification
circuit:
• measuring range 0 to 44 °C
• error limits for module without probe: between 0 and 25 °C ±0.2 °C, between 25 and
44 °C ±0.1 °C
• display update interval: 2 seconds
• 5 minutes to warm up for full accuracy
Functional safety
Continuous self-tests prevent display of values outside the calibration error limits; when
service screen is called up the test values of 38.8 °C ±0.1 °C and 4.0 °C ±0.2 °C are dis-
played.
Technical inspection, calibration
Calibration tests must be carried out on the monitor every two years (refer to section 3
“Maintenance and technical inspection”), technical inspection once a year.