Baxter has ended service on this product. A Baxter AS50 User Manual. Baxter AS50 Brochure and Specs. Adepto Medical. AG Biomedical. Envi Health Solutions. InfuSystem, Inc. Integris Equipment. Med Repair Tech. Mountain States Biomedical Services. ReNew Biomedical. The Auto Syringe AS50 Infusion Pump is designed to meet the fluid and drug delivery requirements of today's changing clinical environment.
It provides accurate, continuous or intermittent infusion of intravenous solutions, drug solutions, whole blood, and packed red blood cells. The pump is indicated for infusion via intravenous IV , intra-arterial IA , epidural, or subcutaneous routes of administration. It can be piggybacked into an ongoing infusion line to deliver secondary solutions automatically, precisely, and economically.
Infusion rates are programmable from 0. The pump accepts standard disposable syringes from 1 mL to 60 mL in size. The primary encoder measures the movement of the rotor of the DC motor that drives the lead screw. The secondary encoder monitors the rotation of the lead screw. The tertiary encoder is accomplished by monitoring the plunger drive potentiometer, it determines if the plunger drive mechanism is advancing properly. The occlusion pressure is determined indirectly by measuring the pressure applied to the plunger of the syringe by measuring the reaction force on the lead screw via a strain gauge force measuring system.
A tilt switch is used to detect and compensate for the vertical attitude of the pump for small diameter syringes. Power is provided by a 5 cell battery pack. The pack is charging when the AC Charger is present.
The battery pack must be present as the device is not intended to be operated on AC power alone. Syringe barrel diameter is sensed by a mechanical linkage of the barrel clamp to a soft pot on the syringe holder mechanism. This signal is filtered by R40 and C27 to a frequency of KHz. Syringe flange detection is provided by a membrane switch in the barrel clamp assembly. Signal lines followed by an asterisk indicate a logical NOT of the signal, or the signal becomes true when logically low and false when logically high.
Barrel position detection is provided by two membrane switches connected in series in the barrel clamp assembly. Each switch is activated by pressure of the syringe barrel on its respective half of the barrel cradle.
Syringe plunger position is detected by linking the plunger driver to a soft-pot in the plunger driver mechanism. The system provides power and receives signal from the soft-pot via J7. Syringe plunger capture is detected by a mechanism in the plunger driver that disengages the wiper from the soft-pot when the syringe plunger is not properly engaged in the driver.
The audio transducer is a piezo ceramic transducer. It is driven at either 4 kHz for normal tones or an oscillating 4 kHz to 2 kHz for fail-safe alarms. The Charger C-AS is an unregulated wall plug transformer. It is specified as a nominal output of It behaves as a simple The battery pack of the pump is a 5 cell 1.
This gives it a nominal 6 volt operating voltage. Actual battery voltages range from a high of 7. Depleted battery threshold is defined as 5.
There are two parallel connections to the battery pack via the four pin connector. U1A provides amplification of the strain gauge signals via an amplifier configuration that uses the gauge as part of the amplifier. R1 sets the gain of this circuit along with the absolute value of the gauge resistance. R2, R3 and U1B provide a second gain stage along with an offset adjustment.
The offset adjustment is provided by R The output at P is designed to be within the range of 0. Voltages outside of this range indicate either failure of the circuit or gauge or that the sensor test has been activated. The sensor test is accomplished by pulling P to ground on the digital board. This connects R4 across the bridge and provides a nominal During a test P may go lower than 0.
U2 and U3 are Hall effect sensors degrees out of phase that detect a magnet on the end of the syringe driver lead screw. They provide the secondary channel of detection for lead screw motion. Two devices are used so that a check can be performed more than once per revolution of the lead screw.
S2 is a mercury switch for monitoring of the attitude of the pump. This signal is used to compensate for the mass of the lead screw assembly when using small diameter syringes. This includes the battery charge control circuitry and the serial data interfaces. J10 provides pads on the circuit board for connection to the zebra strip connector to the. These signals pass directly to J and J It gets its power after the fuse F2 and feeds to the Analog board on J Software configuration is required to enable or disable either serial port.
The TTL level serial port can be used for monitoring and control of the pump. It is also used to program the flash memory via the master bootstrap loader program. It is pulled down by R5 and isolated by R6 into U3C It comes from U3D It is pulled low by R4. The RSC communication port is provided for monitoring and control of the pump.
RSC communication is facilitated by U5. It is a self contained voltage generating serial port. This control line shuts down the voltage converters and puts the device in a low power state with tri-stated outputs.
The signal inputs are selected by the. C9 provides filtering of line transients. The digital board contains most of the digital circuitry for the pump including its microprocessors.
The keypad is a matrix of switches created by a sandwiched array of silver polyester circuits and an elastomer cover.
The switch functions of the keypad are arranged as follows:. The columns are scanned via UP1. No switches are present at the shaded sections of the table. The LED status indicators are located above the keypad. They provide an alternate method of communication between the user and the pump.
They have different behavior modes depending on the mode of operation of the pump. It is lit whenever the fail-safe latch is in the set state. It gives an indication of the charger being active.
J7 connects the digital board to the Drive Potentiometer Position Sensor. This signal is calibrated by using a series of gages in the syringe drive mechanism with the pump in calibration mode. Plunger capture is performed by mechanically lifting the potentiometer wiper when the syringe plunger is not captured in the plunger driver.
This is a tertiary check on the movement of the syringe plunger and also assures that the plunger drive mechanism has properly captured the lead screw with the half nuts. The sensor power on the system is switched on and off to conserve power, especially at low delivery rates. The display is connected to the digital board through two elastomer zebra strip connectors. The digital board contacts are gold plated to enhance the reliability of this connection.
It is held in place by the LCD frame assembly. This voltage controls the potentials provided to the LCD display segments. The LEDs are Ultra Bright reddish orange devices that shine light into the fiber optic backlight panel. The backlight is diffused up through the LCD panel by this fiber optic device to provide an even panel backlight. Sensor calibration modes include Calibration Review mode and Calibration Set mode. Calibration Review mode allows review of the calibration settings without the risk of altering them.
Calibration Review mode allows the operator to review the following sensor calibration settings in the following sequence :. Plunger Driver Position Sensor. During plunger driver position calibration review, the pump continuously displays the analog and digital plunger driver position sensor readings, based on the current calibration settings. The pump clears the readings, and continues with the syringe recognition calibration review. During syringe recognition calibration review, the pump continuously displays the analog and digital barrel clamp position sensor readings, based on the current calibration settings.
The pump clears the readings, and continues with the pressure sensor calibration review. The pump begins stepping the motor. After approximately 5 seconds, the digital pressure sensor reading is continuously displayed, and the reading is updated with each motor step.
The motor will not operate and no reading will be displayed unless the plunger capture sensor indicates the presence of a syringe plunger or equivalent. The pump clears the readings, and continues with the auxiliary LCD test. The pump allows a detailed test of the LCD for segment shorts and opens. N is displayed in the Syringe mfr field. The LCD is initially blanked. Each segment in the top line of the LCD is then turned on for.
When the last segment has been displayed, the test repeats with the first segment of the same line. Calibration Set mode provides the following calibration functions in this sequence :.
Calibrate Plunger Driver Position Sensor. Calibrate Syringe Recognition Sensor. The pump sounds an error beep for each key. These tones are provided to discourage unauthorized access and may be ignored. Following the software version display, the pump proceeds with the plunger driver position sensor calibration sequence.
This is accomplished by using calibration standards to input two drive position locations to the pump. The software then utilizes these two reference locations to complete the driver position calibration. With this information, the pump is then able to determine the distance between the plunger driver and the barrel clamp.
This is accomplished by using calibration standards to input two barrel clamp positions to the pump. The software then utilizes these two reference positions to complete the syringe recognition calibration.
With this information, the pump is then able to recognize syringe barrel diameters as part of its syringe recognition feature. This is accomplished by providing input to the pump while hanging a 10 lb. The software then utilizes these two reference points to complete the pressure sensor calibration. With this information, the pump is then able to recognize pressure values applied to the plunger driver. This is accomplished by using a variable power supply to provide two references points to the pump at 7.
With this information, the pump is then able to recognize battery voltage values. At the beginning and end of each sensor calibration sequence before and after the portion of the sequence in which the standards are read , the LEDs indicate the following:. The Configuration Replication feature allows the entire configuration file including protocol libraries and the library access code to be copied from one pump the source pump directly to a second pump the destination pump.
This permits replication of configuration information from a master pump to multiple pumps. System configuration modes include Configuration Review mode and Configuration Set mode. See Chapter 8 for complete instructions regarding system configuration. Configuration Review mode allows review of configurable options without risk of altering them.
Y is displayed in the syringe manufacturer field. When the last configuration group option has been reviewed, the pump automatically restarts the POST.
Configuration Set mode is primarily used to select and control configurable options, and provides the following functions:. On entry to Configuration Set mode, the pump initially displays the date and time, in the following format:. Following the date and time display, the pump presents the software version display.
The first line of the text display indicates the pump software version. The second line is divided into two fields. The left field displays the configuration version, a 2-character code that identifies the format of the configuration data. The right field displays the 4-character configuration checksum, which identifies the entire current configuration file including the protocol library.
The following example shows a software version display for software version 7. This configuration information allows a high-confidence rapid comparison of configuration files between two pumps. We recommend Duracell Procell size D batteries for use in this pump.
What should I use to clean the pump with? We recommend to use Isopropol alcohol and a Magic Eraser for removal of sticker residue and stains. Dissolve it and Goo Gone work well also.
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