EasyOne™ Technical Manual - E-NESS

1 easyone Technical Manual Page 1 easyone Technical Manual Contents 1 INTRODUCTION ..2 2 OPERATION PRINCIPLE .. 2 3 Technical DETAILS .. 3 easyone SPIROMETER HANDHELD 3 4 PRINTED CIRCUIT 4 PARALLEL CRADLE TO PRINTER PIN-OUT .. 6 5 RS232 CRADLE TO PC CABLE PIN-OUT .. 6 6 REPLACEMENT PARTS 6 7 OPERATION VERIFICATION .. 6 8 HIDDEN KEYS .. 7 9 DEVICE ERROR CODES .. 8 10 easyone SOFTWARE UPDATE .. 9 9 9 SOFTWARE UPDATE 9 11 PRINTER COMPATIBILITY LIST .. 10 12 PREDICTED VALUES 12 easyone Technical Manual Page 2 1 Introduction The easyone spirometer uses digital ultrasonic flow measurement technology for fast, accurate, reliable operation.

2 The easyone was designed for full range testing in primary care, specialty physician, industrial and hospital settings. It offers automated comparison to predicted values, pre- and post Broncho Dilator comparisons, interpretation of results and test quality control that automatically assesses patient effort offering helpful suggestions to obtain optimum results. Optional easy to read and interpret color printout with graphic display for instant test review is available. The single-patient-use spirette minimizes risk of cross-infection. 2 Operation Principle This easyone flow sensor is equipped with two ultrasonic transducers, mounted at different sides of the flow channel.

3 In order to determine gas flow (and molar mass), ultrasonic pulses are transmitted in up- and downstream direction. Precisely measured transit-times are the basis for determining flow and molar mass. The following figure shows a diagram of the flow sensor including its internal sound transmission path. Figure 1: Schematic of easyone flow sensor easyone Technical Manual Page 3 3 Te ch n i c a l D e t a i l s easyone Spirometer Handheld Unit The following pictures show the top, rear and bottom views of the easyone . Figure 2: Top view of easyone Figure 3: Rear view with empty battery compartment The two screws on the back side are used to open easyone .

4 With the exception of the lithium battery there are no serviceable parts inside the unit. Therefore do not open the unit! Figure 4: Bottom view of easyone The bottom view shows the name plate, the serial number and the easyone -to-Cradle connector. easyone Technical Manual Page 4 Cradle The following pictures show the top and a rear views of the easyone cradle. Figure 5: Cradle top view The top view shows the easyone -to-Cradle connector. This connector is a non-standard connection between the electronic board inside easyone and the board inside the cradle.

5 Figure 6: Cradle rear view The rear view shows the serial / parallel connector. The function of this connector is automatically determined depending on the cable connected to it. If a standard parallel cable is connected the board inside the cradle switches to parallel mode. If the specialized serial cable is connected the board switches to serial mode. easyone Technical Manual Page 5 Printed Circuit board All electrical components of easyone are mounted on a single PCB. With the exception of the lithium battery no components can be serviced.

6 The following two pictures show a top and bottom view of the PCB. Figure 7: Bottom view of easyone PCB The lithium battery located on the top right of the PCB has an approximate life time of 5 to 10 years. In early revisions of the hardware the lithium battery is soldered on the board. Figure 8: Top view of easyone PCB (without EMI shielding) easyone Technical Manual Page 6 4 Parallel Cradle to Printer Pin-Out The following table lists the pin-out of the printer connector. Pin Description Pin Description 1 Strobe 14 nc 2 Data 0 15 Fault 3 Data 1 16 nc 4 Data 2 17 nc 5 Data 3 18 Ground 6 Data 4 19 Ground 7 Data 5 20

7 Ground 8 Data 6 21 Ground 9 Data 7 22 Ground 10 Acknowledge 23 Ground 11 Busy 24 Ground 12 nc 25 nc 13 nc nc = not connected 5 RS232 Cradle to PC Cable Pin-Out The RS232 cradle to PC cable has a standard 9 pin DSUB connector at the PC side. The following table lists the pin-out of that connector. 123459 876 Pin Description 1 not connected 2 RXD (receive data) 3 TXD (transmit data) 4 not connected 5 GND (ground) 6 not connected 7 RTS (ready to send) 8 CTS (clear to send) 9 not connected 6 Replacement Parts List The following parts are available for replacement.

8 Part description Part number Case front half diagnostic 2001 Case front half frontline 2000 Case rear half 2001 Battery door 2001 Lithium battery (BR 1225, 3V) 2001 Cradle housing 2010 7 Operation Verification In order to check correct operation of easyone please perform the following steps: Perform a calibration check as explained in the EasyGuide Manual . Make a printout of the calibration report. If these two steps can be executed successfully the device operates normally.

9 easyone Technical Manual Page 7 8 Hidden Keys The hidden key sequences access special features that are not available in the standard menu structure of easyone . The following table shows what key sequences are available. The column labeled Location indicates in what menu / screen the described key sequence has to be used. Caution: The key sequences should not be used in conjunction with patient testing. Location Key sequence Description Main Menu 1-3-5 Factory defaults (same as in Configuration Menu).

10 Configuration Menu 1-3-5 Manual adjustment of flow gain factors (FlowGainIn/Ex). Attention: Changing these values will influence the calibration of the unit. Device self test error screen 1-3-5 Ignore error an go on. Device info screen (from Configuration Menu). 1-2-4 Show additional device information. Device info screen 1-2-5 Hard factory reset (database is also deleted). Device info screen 1-2-6 FVC filter disable temporarily (until next power cycle). Device info screen 1-2-7 Switch off BTPS correction temporarily (until next power cycle).