Service Manual
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SmartFlow Service Manual Version 1.1
SmartFlow Service Manual
INDEX INDEX ... 2 INTRODUCTION ... 2 PRESENTATION ... 3 THE FLOWSCALE... 4 CAUTION ... 4 DESCRIPTION ... 4 MAINTENANCE ... 4
THE RECORDER ... 5 CAUTION ... 5 DESCRIPTION ... 5 MAINTENANCE ... 5
TROUBLESHOOTING LIST ... 6 TECHNICAL DESCRIPTION ... 8 ANALOGUE SECTION ... 8 DIGITAL SECTION ... 9 RECORDER CIRCUIT DESCRIPTION ... 10
SPECIFICATIONS ... 13 FLOWSCALE ... 13 RECORDER ... 13
STANDARDS... 13 CLEANING... 13
INTRODUCTION We thank you for choosing the SmartFlow urine flowmeter. Use of the latest technology has allowed this flowmeter to combine high quality measurement with great simplicity in use: •
One or two simultaneous flowscales - one radio frequency and one fibre optic.
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Automatic detection of the collection jug.
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Digital signal analysis - to represent closely the dynamics of mictiometry.
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Real time display on an illuminated touchscreen LCD.
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Automatic detection, recording and saving of mictiometry studies. Intermittent studies are no longer lost!
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Automatic printing of the complete summary on wide thermal paper.
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Replaceable transparent plastic cover – protection and hygiene guaranteed.
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SmartFlow Service Manual
PRESENTATION
In the box: •
Recording unit with tactile LCD screen.
•
Medical grade power supply.
•
2 thermal paper rolls, 1 of which is already installed in the recorder.
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HF 1 or FO 2 flowscale.
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Collection jug, 2-litre capacity.
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4 alkaline 1.5v batteries.
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A calibration weight (500g).
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Instructions for use / service manual.
Options:
1 2
•
Supplementary flowscale to form a group of 2 flowscales, which may be used simultaneously, of which one is HF and the other FO.
•
Ergonomic micturition chair (female & male patients).
•
Micturition stand (male patients).
•
Urodynamics procedure table.
HF: transmission of data by radio frequency. FO: transmission of data by fibre optic.
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SmartFlow Service Manual
THE FLOWSCALE CAUTION SmartFlow HF and FO models do not have any user serviceable parts or internal electronic or mechanical components which can be replaced by unauthorised persons. Unauthorised repairs will invalidate warranty terms. Figure 2: Battery holder
DESCRIPTION
The flowscale status is indicated by a LED that changes colour (green / red) and frequency.
The flowscale is based on the three main components indicated in figure 1 • The main enclosure (1) • A top plate (2) • A plastic protection cover (3)
Calibration is performed by pressing a button that is located on the flowscales, directly below the LED (Figure 3).
Figure 3: LED and Calibration button
Figure 1: The flowscale
The enclosure contains the main components that perform the flow measurement - by calculating the derivative of the weight. The main components are: • A precise load cell • A battery holder • A PCB containing the micro controller • A communication interface populated in the PCB. This may be either fibre optic or radiofrequency. The battery holder is located underneath the main enclosure (Figure 2).
MAINTENANCE The SmartFlow scale requires little maintenance. The batteries must be changed when indicated on the recorder screen. Flowscale calibration should be performed at least once every 12-month period. These operations do not represent any major difficulty and they can be performed by the user. Both are described in the user manual. In the case of any malfunction, follow the steps in the TROUBLESHOOTING LIST chapter.
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SmartFlow Service Manual
THE RECORDER MAINTENANCE CAUTION SmartFlow HF and FO models do not have any user serviceable parts or internal electronic or mechanical components which can be replaced by unauthorised persons. Unauthorised repairs will invalidate warranty terms.
The only maintenance that the user must perform is to replace the thermal paper when necessary. This procedure is fully described in the user manual. In the case of any malfunction, follow the steps in the TROUBLESHOOTING LIST chapter.
DESCRIPTION The recorder unit comprises two main components: The power supply and the main enclosure. The main enclosure includes (figure 4): • Touch panel LCD screen • Thermal printer • Paper cutter • Power supply connector • Flexible aerial for models HF or HF/FO • A fibre optic cable socket for the models FO or HF/FO
Figure 4: Recorder and power supply
The recorder is fully controlled using the graphic interface on the touch panel screen. Once configured, it has an automatic performance mode and the user is only required to detach the printed results from the paper when the recording has finished. The user can only access the configuration mode when the system is booting-up. While in use the power supply must be connected at all times. 5
SmartFlow Service Manual
TROUBLESHOOTING LIST Problem Description
Possible Cause
Solution
The LED does not illuminate.
The batteries have expired. The SmartFlow identifies flat batteries when total voltage is < 4 Volts.
Replace batteries. It is recommended to use good quality Alkaline batteries.
1 F L
2
If problem continues please contact Albyn Medical technical service. The LED flashes fast in red.
O
3
C
L
If after several trials of calibration the problem persists, It is possible that the load cell is damaged. The load cell must be replaced by an Albyn Medical authorised technician.
Highest probability: The calibration procedure has been performed wrongly. See point 2.
See the instructions for use to learn about the calibration procedure.
Lowest probability: The flowscale top plate is incorrectly placed, disrupting the weight of the jug.
If the top plate is damaged or in contact with the main enclosure please contact Albyn Medical technical service.
The LED flashes fast in green when the collection jug is on the flowscale, and the unit starts recording even with no flow.
Highest probability: The flowscale is on an unstable surface.
Ensure the flowscale is located on a stable surface, without vibrations.
The calibration procedure has been performed wrongly. See point 2.
See the instructions for use to learn about the calibration procedure.
Lowest probability: The flowscale top plate is incorrectly placed, disrupting the weight of the jug.
If the top plate is damaged or in contact with the main enclosure please contact Albyn Medical technical service.
Batteries expire too quickly.
The jug is always on the flowscale, even when not in use (higher power consumption).
The collection jug should be removed when not in use.
The unit is recording even with no flow.
See point 4
The LCD screen is off.
The recorder does not have power.
Check that the power supply is correctly connected. Ensure the connector of the power supply is inserted into the recorder unit.
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• A wrong calibration procedure
The LED flashes slowly in red while the collection jug is on the Flowscale.
E
R
See the instructions for use to learn about the calibration procedure.
• Too much weight has been applied to the flowscale
A
4
The calibration coefficient has been disrupted. This could be caused by: • The weight used for the calibration was not 500g
W S
E
Check the voltage at the power supply lead (24 volts DC)
C O 7
The LCD screen is dim.
The recorder is in sleep mode.
The backlight of the LCD screen is automatically reactivated when flow study is detected, or when the screen is touched. In the case that the LCD does not re-activate, Unplug the power and re-boot.
Printer is out of paper.
Load a new paper roll. See the instructions for use manual for detailed procedure.
E
The printer is not working and the printer icon flashes on the LCD.
R
The printer is not working and the printer icon is NOT flashing.
Paper is wrongly placed or jammed in the printer.
Remove the paper roll and try again, following instructions in the manual.
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If power supply connection is not the problem then contact Albyn Medical technical service.
R D
It is not necessary to re-calibrate the flowscale. The calibration coefficient is saved in permanent memory.
The paper roll has not been loaded properly. Date and time are not updated. 10
The recorder has been disconnected from power during a long period of time, and the internal backup battery has expired.
See the instructions for use manual on how to access the setup mode. Make the adjustments and leave the recorder powered for at least 24 hours to recharge the backup battery.
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SmartFlow Service Manual
The flowscale icon flashes.
The recorder is not receiving any signal from the flowscale. FLOWSCALE HF/FO •
Flowscale batteries have expired.
Check/replace the flowscale batteries.
FLOWSCALE HF
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•
The flowscale is too far away from the recorder.
Position the flowscale closer to the recorder.
•
The recorder aerial is not straightened out.
Verify the position of the recorder aerial: It must be as straight as possible without being against the wall of the case.
•
The flowscale serial number does not match the serial number memorised by the recorder.
Access the setup mode and seek the flowscale. Check with the user manual for this procedure.
FLOWSCALE FO •
The fibre optic cable is unplugged or wrongly connected.
Verify.
•
The fibre optic cable is kinked or cut.
Verify that there are no tight folds or breakages along the fibre. NOTE: The fibre optic cable end should produce a light during information transmission verify.
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The battery icon flashes.
Flowscale batteries are low/expired.
Replace batteries.
The flowscale icon does not appear on the recorder screen.
The HF or FO flowscale is not recognised.
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Access the recorder set up mode and activate the flowscale type (HF or FO). If it is an HF, seek the flowscale to pair & memorise it. See the user manual for this procedure.
The report shows transmission errors.
The recorder does not receive all information sent from the flowscale, data errors are detected. FLOWSCALE HF/FO •
Flowscale batteries are low.
Check the battery level.
FLOWSCALE HF •
The flowscale is too far away from the recorder.
Position the flowscale closer to the recorder.
•
The recorder aerial is not straightened out.
Verify the position of the recorder aerial: It must be as straight as possible without being against the wall of the case.
•
The flowscale serial number does not match the serial number memorised by the recorder.
Verify that there is not another HF flowscale in the communication zone of your SmartFlow (around 30m).
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Install the SmartFlow in a different environment in order to verify that it works properly. There may be excess electrical ‘noise’ in a certain area, and moving the SmartFlow to a different area will improve results. NOTE: The recorder and flowscale should not be located next to large metallic structures, lockers etc… FLOWSCALE FO
Recorder records continuously and prints non-studies.
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•
The fibre optic cable is unplugged or wrongly connected.
•
The fibre optic cable is kinked or cut.
The flowscale is not stable.
Verify. Verify that there are no tight folds or breakages along the fibre. Verify the flowscale stability, it should be located on a flat surface, free of vibrations.
Batteries are low.
Check batteries, low batteries may disturb the flowscale sensitivity, resulting in false studies.
Calibration coefficient is erroneous.
Recalibrate the flowscale.
Touch panel screen is damaged.
If the printed report is always the same, the touch panel LCD may be the cause. Re-boot the recorder. If the problem persists contact your Albyn Medical technical service.
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SmartFlow Service Manual
TECHNICAL DESCRIPTION FLOWSCALE CIRCUIT DESCRIPTION ANALOGUE SECTION The schematics of the analogue section of the flowscale are shown in Figure 5. The flowscale measures the flow indirectly by calculating the derivation from the urine volume during the micturition. A load cell is measuring the weight of the urine collected in a jug. The load cell is connected to P2 on the PCB. The very small signal variations from the load cell are fed to an instrumentation amplifier built around IC1 – A, C and D. It removes the common DC voltage and amplifies the variations across the load cell. IC1-B sets the reference point of the instrumentation amplifier at 0.382V. This circuit is required because of the single sided power supply. The output of the instrumentation amplifier is connected to a 2nd order low pass filter (IC2) and also directly to the ADC build in the microcontroller (INNF signal). The filter cut-off frequency is close to 8 Hz. The load cell, the instrumentation amplifier and the low pass filter are powered from REG2 delivering 3.3V. REG2 is switched on and off (CDE5V) by the microcontroller thus allowing a lower current when in idle mode. During a micturition, REG2 stays on. The output of the filter is fed to the microcontroller ADC (INF) and to the low power 16 bits ADC (IC3). The flow scale is powered with 4x C size 1.5V batteries. The 3.3V voltage needed for the ADC and all the digital section is delivered by REG1. The battery level is monitored by the microcontroller by the means of a resistor divider R1-R2. The analogue switched voltage is also monitored after the resistor divider R24-R25.
Figure 5: Flowscale Analogue Section
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SmartFlow Service Manual
DIGITAL SECTION The schematics of the digital part of the flowscale are shown in Figure 6. The complete flow scale process is controlled with IC4, an MSP microcontroller from Texas Instruments. The MSP is a very low power RISC microcontroller. It runs from a 32.768KHz crystal (Y1) and the internal clock is generated using a PLL. A 4MHz crystal (Y2) is setting the internal peripheral clock and allows standard baud rates for the build in UART. The flow scale mode is displayed by two LEDs. A plastic optical guide mounted in the enclosure combines the LEDs’ light into a single light point for the user. D1 is the red LED and D2 is the green one. When the green LED is flashing the flow scale is in ready or micturition mode. When red LED is flashing the flow scale is not ready for measurement – see Instructions for use for a complete description of the modes and the associated light flashing rates and colours. Idle mode is the lowest current consumption mode. This mode is activated when the collection jug is not present on the flow scale. The microcontroller checks the load cell (INNF analogue input) for a jug every 2 seconds and then transmits its status to the recorder. The analogue power supply Vdd is switched in this mode. When a collection jug is placed on the flow scale, the Vpp is held on by the microcontroller. The microcontroller acquires load cell values from the external ADC giving a better resolution than its own ADC. IC3 is controlled through a standard I/O port. The microcontroller computes the volume from the digitized values. A frame of bytes is built and sent to the recorder by the means of either a RS232 serial link module (IC6), an optical fibre transmitter (TX1, Q1) or a RF transceiver module (TR1). All the modules receive the data from the standard UART Tx pin. The RF transceiver is controlled with a 3-wire bus emulated on IO ports by the microcontroller. Frequency range depends on the country where the product is installed: 868MHz in Europe and 915MHz in US.
Figure 6: Flowscale Digital Section
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SmartFlow Service Manual
RECORDER CIRCUIT DESCRIPTION The recorder is a fully digital product. It has been designed to be powered from mains for long periods so it has no main switch. The power supply is an AC wall block giving 24V DC. A DC/DC converter (Figure 7) is delivering 5V to the DSP board (Figure 8-10). Other voltages are created locally when needed; it will be mentioned when necessary.
Figure 7:
The recorder is built around a DSP microprocessor dedicated for intensive signal processing and general microcontroller tasks. The DSP (U1) has its own internal FLASH memory where the firmware is stored. It also has some program and data fast RAM memories but for the recorder application it has been necessary to install a 512x16 mega external memory bank (U9-U10). This memory bank is power safe by the means of the battery installed over U7, which is the real time clock. When the recorder is no longer connected to the mains power, U7 switches the battery voltage (Q2) and keeps the data safe in RAM. U7 is also responsible for reloading the battery and it generates the reset signal either automatically or manually (S1). The DSP circuit (Figure 8) is powered with 3.3V and 1.8V regulated by REG1. REG1 is a power up sequencing regulator circuit. The clock (Figure 8 and 10) is generated from a 30MHz oscillator. Internally the DSP runs at 150MHz.
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SmartFlow Service Manual
The recorder can receive the flowscales data frames through two different media simultaneously depending on the product version. The interface board can be populated with a fibre optic receiver (RX1) or a RF transceiver (TR1- 3.3V regulator). The transceiver is directly connected to the first UART of the DSP, and the FO receiver is directly connected to the second one.
Figure 10: DSP Board Peripherals
A 320x240 pixels LCD touch panel is connected to the DSP GPIO A port through two buffers (U2-U3) that translate the 5V digital levels from the LCD to the 3.3V levels required by the DSP. An 8-bit bus protocol is emulated in the firmware. The backlight is controlled with Q3. A 80mm large thermal printer head is used to produce the report from a mictiometry. This head is driven by a dedicated circuit board powered from 24V. This board has a standard parallel interface port. This port is connected to the DSP GPIO B port using a buffer (U4-U6) for the same reasons as the LCD. The firmware emulates all the parallel port signals. A JTAG port (P1) is provided for in site programming during manufacturing and also for possible firmware upgrade.
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SmartFlow Service Manual
SPECIFICATIONS
CLEANING
FLOWSCALE
Always check with your hospital infection control officer or local hygiene authority for the correct procedures regarding cleaning/disinfection.
Maximum load: 3kg. Precision: 0.25g. Jug capacity: 2 litres. Measurement range: 0 – 60ml/s. Power: 4 alkaline batteries 1.5V type C or LR14. Battery life: 3 months at 5 flows/day, 5 days/week. Collection jug must be removed when not in use, to preserve battery life. Transmission: Plastic fibre-optic 5m or radio transmission ’FM 868MHz (medical range) depending on the model. HF range: 10m to 30m depending on the environment. Detection time: 3 seconds. End of Mictiometry: 15 seconds. Dimensions: ø 190mm x h 60mm. Weight: 0.7kg
RECORDER Power: 24 V DC, 1.3A. Converter AC/DC 230V 50Hz. Screen: LCD tactile 320x240. Printer: Thermal printer 576 points, 75mm width. Calendar/Time: auto-powered. Processor: DSP 16 bits 150Mhz, 1 MB RAM Flowscale names: 1=HF and 2=FO (depending on model). Number of memories: 4 Maximum study length: 4 minutes per memory Duration of the memory: 5, 10 or 15 minutes, userselectable. Filter: numeric type FIR. 3 possible levels, user-selectable. Dimensions: L 250mm x w 140mm x h 110mm Weight: 1.3 kg
The flowscale unit may come into contact with urine and other bodily secretions. Disconnect mains power before cleaning the recorder unit. Use conventional cleaning products to wipe clean the flowscale, and the recorder unit, such as: GP Solutions (General Purpose Liquid Detergent) ie Youngs ‘Hospec’ – 5ml per 5 litres hot water. Aldehydes (Cidex PlusTM, Wavicide®-01, OmnicideTM ) DO NOT spray, pour or drip water or disinfectant solutions, inside the flowscale, or into the recorder unit paper area. DO NOT apply solvent or abrasive cleaners – these may damage the plastic enclosures. The transparent plastic flow-scale cover should be cleaned by immersing in hot soapy water. Inspect and replace the plastic cover frequently, replace immediately if the plastic is cracked or damaged. Replacement covers are available from the companies below, as well as further operation and service information.
DISPOSAL Batteries and other electrical components should be disposed of in accordance with your local environmental laws and guidelines.
STANDARDS IEC 601-1-2 Class II Type BF Directive 93/42/EEC EN300-220 radio standard EN301-489 ECM standard EN60950 electrical security
International
United Kingdom
Albyn Medical S.L. Polígono Industrial Cordovilla, Calle D Nº 1, 31191 Cordovilla Navarra – Spain. Tel. +34 948 29 33 24 Fax. +34 948 29 34 18 [email protected] www.albynmedical.com
Albyn Medical Ltd. Bridgend Road Industrial Estate Dingwall, Ross-shire IV15 9QF Scotland – U.K. Tel. +44 (0) 1349 862388 Fax. +44 (0) 1349 864146 [email protected] www.albynmedical.com
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