Interface Test Screen - Mallinckrodt Nellcor NPB-70 Service Manual

Section 4: Service Mode
4.2.3

Interface Test Screen

4-2
Note: To exit the service mode and save event messages, turn off the
monitor. Event messages will be erased when exiting the service
mode by a long press of
The interface test screen shows four parameters (listed below) that
provide tools for the user to test, adjust, and calibrate the unit's
interfacing systems.
• HMI Test
• Light Detector
• Contrast Cal. (Calibration)
• CO Calib. (Calibration)
2
4.2.3.1 HMI Test
When the HMI Test is turned on, the monitor performs a self-test of the
following sub-systems:
• Buzzer (sounds for one second)
• LCD graphic screen shows a checkerboard pattern
• 7-segment digital display (8s scroll left to right)
• Alarm bar (lights red, yellow, off)
• Backlight (turns on and off)
• Alarm silence indicator (light turns on and off)
When the HMI test is completed the status field returns automatically to
"OFF".
4.2.3.2 Light Detector
The Light Detector parameter allows the service technician to set the
threshold value of the phototransistor. The default value is 1 and the
range is from 1 to 5 with 1 as the most sensitive (backlight on at all times)
and 5 as the least sensitive (backlight off). The threshold value should be
set according to the lighting conditions of the working enviroment. A
higher threshold value saves on battery power consumption.
Note: When the monitor's power management is set to Low, the backlight
is off.
.