Description
The original syringe fixing system of the Vitfit syringe pump allows almost any syringe to be used from micro syringes to large volume syringes without the use of an specific adapter.The syringe handling is very easy. It is tightly held in both directions (infusion and filling).
Description of the syringe pump
- To move the pusher, a motor which uses new technology to ensure very high torque and ten times longer lifetime has been selected. For the transformation of the rotation into a linear movement required for pushing the syringe plunger, a new linear bead bearings has been used. This is an expensive component in the instrument, but it offers decisive advantages to the user in terms of efficiency and the mechanical yield/force of the system.
- The precise mechanics with a volumetric spiral is protected in the instrument casing and the pusher arm does not reach out from one side (as in usual existing syringe pumps), but is integrated into the rear of the instrument. The casing and the main body are made of metal with partial PTFE protection. Therefore it is less sensitive to solvents.
- A microprocessor allow controls the activity of the syringe pump in an easy but effective way.
- The movement of the new brushless neodymium magnet motor is constantly under the control of the microprocessor, which corrects immediately any deviation from the pre-seted speed.
- This syringe pump is also programmable. Up to 99 program steps can be memorised. The pump can be programmed in both directions (for delivery and filling of the syringe). This allows the syringe pump to be used in any way.
- 2 Versions: standard and HP (high pressure)
Utilisation of the syringe pump
- Constant flow rate. In this standard application of the pump. The flow rate will be kept constant during the all pre-selected time period.
- Profile. Permits varying flow rates to be pre-programmed (including exponentially increasing flow rate as used for example in feeding cultures during fermentation, etc.). By programming a required time interval with zero flow rate as the first step or at the last step the pump can be automatically switched on or off. If the flow rate of the last step is different from zero then the pump will continue pumping at the specified flow rate until the syringe is empty.
Safe Switching Power Supply The mechanical losses are so small that the pumps can be use a miniature in-plug integrated switching power supply using line voltages from 95 to 240 V AC, 50/60 Hz. During field application the pump can be powered by a 12 V accumulator or a 12 V battery.
Automatic switch off of the syringe pump
The motor will be switched off when the syringe is empty or has been refilled.
Remote control of the syringe pump
- simple ON/OFF (signal 3 to 12 V DC or higher with resistor)
- progressive speed control over the whole range signal 0 to 10 V DC, (0 to 20 or 4 to 20 mA option)
- RS 485 interface (option) for communication with a PC or similar device. The programs Siam and PNet have been designed to control the syringe pump with this interface.
Specifications of the syringe pump
| Type | Microprocessor programmable syringe pump; infusion/withdrawal |
| Program | up to 99 steps of speed and time |
| Time resolution | 0 to 999 min. in 1 min. steps |
| Accuracy | +/- 1% |
| Reproducibility | +/- 0.2 % (electronical) |
| Syringes | glass, plastic, metal; from 0.5 ul to 150 ml |
| Flow rate range | minimum 0.01 ul/min. with 5 ul syringe; maximum 120 ml/min. (7 l/hr) with 150 ml syringe |
| Memory | non volatile for storage of all settings |
| Maximum force | VIT-FIT syringe pump: 30 kg (reducible to 8 kg by a switch)VIT-FIT HP (high-pressure) syringe pump: 60 kg (reducible to 16 kg by a switch) |
| Maximum pressure | 2 MPa with 10 ml syringe (VIT FIT standard)4 MPa with 10 ml syringe (VIT FIT HP) |
| Motor | microprocessor controlled brushless long life BLDC motor with neodymium magnets |
| Transmission | linear bead bearings |
| Pusher travel | 120 mm |
| Speed range | 0 to 999, equivalent to 0.08 mm/min – 80 mm/min |
| Interface | ON/OFF control by external contact or 3-12 V voltage, speed by external voltage 0-10 V, RS 485 (option) |
| Voltage | 95 to 240 V/60-50 Hz AC plug integrated switching power supplyDC 12V/12 W or similar (field operation on 12 V accumulator) |
| Dimensions | 12.5 × 26.5 × 13 cm (H × W × D) |
| Weight | 3.5 kg |
