TERUMO INFUSION PUMP MODEL STC-508 [Medical Electronics]

TERUMO INFUSION PUMP MODEL STC-508

Medical Electronics

Principle of Operation

     This unit provides stable, accurate infusion by employing a peristaltic pump equipped with an anti-pulsation mechanism and driven by microcomputer controlled stepping motor.  The unit is provided with the following alarms to ensure safe Infusion.

Alarm name	Function	Alarm Output
Infusion complete	Infusion completes when volume delivered reaches or exceeds the delivery limit.  Subsequently, Infusion continues at the delivery rate of 1ml/h [keep-vein-0pen].  Infusion complete alarm is released automatically when volume delivered becomes less than the delivery limit.	Alarm indication flickers (1.6Hz).  Buzzer continues to sound.  External alarm relay one-shot output.
Start forgotten	When sop position continues for more than w minutes, alarm is output.  Only applicable when the setting of the main PCB DIP SW bit 5 is OFF.	Buzzer sounds intermittently [1.0Hz].  External alarm relay on-shoot output.
Low battery.	Low battery detection circuit detects circuit voltage.  When the voltage of the battery comes down to 9.4Volts or lower, alarm is output. [Switching over to self-diagnosis is mode, voltage A/D value is confirmed.  A/D value 108 or less] alarm judgment is made regardless of infusion operation.  [Alarm is output whether the motor is mot in motion]  Low battery alarm is automatically released when the voltage of the built-in battery is 9.9V or higher.  [A/D value 111 or larger] or line power is connected.  System power source is switched OFF, when the voltage of battery comes down to 8.8V [A/D value 101 or less] (Shut down)	Alarm indication flickers at 1.6Hz.  Buzzer sound intermittently [intervals of buzzing get shorter gradually from 0.5 second to 0.4 second, 0.3 second, 0.2 second, 0.1 second, with the lapse of every minute, thereafter changes to continuous buzzing.  Infusion continues.  External alarm relay one-shot output.  *For methods of switching over to self diagnosis mode and of confirming the voltage A/D value, please refer paragraph 4.2 regarding operation in practice.  Infusion stops.
Air-In-Time	When the Air-In-Time detector senses an air bubble (length inside tubing at least about 5mm) it outputs an alarm.  Alarm judgment is made regardless of infusion.  [Alarm is output whether the motor is not in motion]	Alarm indication flickers [w.6Hz].  Buzzer continues to sound, infusion stops.  External alarm relay one-shot output.
Occlusion	An occlusion detector detects expansion of the tubing, and outputs an alarm when tubing internal pressure reaches 0.5—1.0kg/cm2.  Alarm judgment is made regardless of infusion operation. [Alarm is output whether the motor is not in motion]	Alarm indication flickers [1.6Hz].  Buzzer continues to sound.  Infusion stops.  External alarm relay one-shot output.
Door Open	A door open detector senses whether the door is open or closed.  When the door is open, it output alarm.  Alarm Judgment is made regardless of infusion operation.  [Alarm is output whether the motor is not in motion]	Alarm indication flickers (1.6Hz).  Buzzer continues to sound.  Infusion stops.  External alarm relay one-shot output.
Main CPU Out of Control	When the main CPU goes out of control, the sub CPU detects it and outputs alarm.  Alarm judgment is made regardless of infusion operation [alarm is output whether the motor is not in motion].  To restore the system from out or control situation, switch OFF the source power and then switch ON again.  Main CPU out of control can be checked by self-diagnosis check mode [DIP Sw 8 bit ON]	(Air-In-Line), occlusion door open) Alarm indication lights ON.  ERR6. 7 are indicated.  Buzzer continues to sound.  Infusion stops.  External alarm relay continues to be output.  [One-shot output is not possible]
Sub CPU out of control	When the sub PCB goes out of control the main CPU detects the situation and outputs alarm.  Alarm judgment is made regardless of infusion operation.  [Alarm is output whether the motor is not in motion]  To restore the system from out of control situation to normal, switch OFF the line power and then switch On again.	Alarm indication undefined.  Buzzer continues to; infusion stops.  External alarm relay continues to be output (one-shot output is not possible).