MIR Spirodoc - 2.3. TURBINE FLOWMETER

Spirodoc
Page 8 of 39
Rev.1.5
Service Guide
1. If everything is in order (battery temperature, temperature rising, battery voltage etc.) then the charging process starts
and the display shows the following image in the upper right
2. At the end of the regular charging process, the display shows the following message:
Battery full
3. If after completing the charging process the battery charger is still connected, a so-called Pulse-Trickle-Function is
activated that gives a very low charge to compensate the self-discharging of the battery while it is idle connected to the
charger.
2.1.2. Room temperature sensor
(IC6) DALLAS DS 18B20 to measure the ambient (room) temperature to enable the calculation of the BTPS conversion
factor.
2.1.3. USB communication port
Version 2.0.
2.1.4. Oximetry port
The connector beside the USB ports is used to connect the oximetry sensor, where this function is enabled on the device.
Many sensors can be used on spirodoc based on the type of test to be performed and on the patient characteristics.
The manufacturer provides the most frequently used sensor with the device, which has the following features:
mechanical part
finger
electrical part
two light emitting diodes (LEDs), one emits in the visible spectre and one infrared
Both lights then pass through the finger and are “read” by the receiver. As these lights pass through the finger, a
proportion of the light is absorbed by the blood and by the soft tissue, in function of the concentration of heamoglobin.
The quantity of light absorbed, at each frequency, depends on the degree of oxygenation of the haemoglobin inside the
soft tissue.
2.2. DISPLAY MODULE
The display module shows patient data, user set parameters and test results. The display has the touch screen function.
It is connected with:
 20-pin flat-cable for digital connection (CON 12)
 4 spring contacts for the display lamp (CON 7 and CON 8)
 4 pin flat cable for touch controller (CON 2)
The touch controller (IC17) MAX 11800
The lamp controller (IC12) MAX 8822
2.3. TURBINE FLOWMETER
The sensor for measuring flow and volume is similar to the model already used in other spirometers produced by MIR
(Series MIR 020 rev 5 Mod. Spirobank II, MIR024_REV2 Mod. Spirobank G USB).
The turbine flowmeter consists of one mechanical and two electrical parts:
Mechanical parts: