ADInstruments MLT844 User manual

ADINSTRUMENTS
MLT844 Physiological Pressure
Transducer Series
Description
The MLT844 Physiological Pressure Transducer is a highly
accurate and robust piezo-resistive transducer. The dome is
easy to fill and is quickly coupled to the transducer without
any liquid between the transducer and dome diaphragms.
This ensures the transducer never fouls and gives the
transducer a long life expectancy. The MLT844 is supplied
with three disposable clip-on domes. It is suitable for
connection to any ADInstruments Bridge Amps.
Operation
To prepare the transducer, first remove the protection cap from the transducer and
slide it down the cable. Fill and flush the tubing system (dome, interconnecting tubing,
stopcocks), prior to attaching dome to the transducer. To minimize the formation of
bubbles, use fluid at room temperature or above and fill the system slowly. When this
procedure is correctly followed, the filled tubing system should be free of bubbles and
the dome diaphragm should not be distended. Attach the dome to the transducer
(keep the filled dome vented to atmospheric pressure).
Note: There should not be any liquid between the dome membrane and the
transducer. Mount the transducer at the level where the pressure is to be measured.
Zero and calibrate the Bridge Amp according to the Owner’s Guide.
Following use, clean, dry and store the transducer safely in its box. The domes are
disposable; however for animal use, they may be used a number of times by thoroughly
flushing them between use. Extra domes in sets of ten are available (MLA844).
Application
The MLT844 Physiological Pressure Transducer is suitable for measuring arterial
and venous blood pressure in animals. It may also be used to measure intracranial,
gastrologic and intrauterine pressures as well as urodynamic measurements by
catheterization.
Technical Diagram
Wiring diagram
1
4
25
3
7
8
6
Excitation (+)
Signal (-)
Signal (+)
Excitation (-)
GND
220kΩ
Schematic diagram
Ø29 mm
5 mm
70 mm
23 mm

ADINSTRUMENTS.com
ISO 9001:2008 Certified Quality Management System
MLT844-DCW-15A
WARRANTY: ADInstruments PowerLab data acquisition units (Product Number Prefix: PL), Front-end Signal Conditioners (Product Number
Prefix: FE) are warranted against defects in materials and workmanship for a period of 5 years from the date of purchase. Other PowerLab
data acquisition units and ADInstruments manufactured Front-end and Pod Signal Conditioners, and Instruments are warranted of a period of
3 years from the date of purchase. Third party products are covered by the manufacturer’s warranty. Warranties are void if the product has
been damaged due to negligence. Consumables and electrodes are not covered by a warranty. All questions regarding service and warranty
should be directed to your nearest ADInstruments representative.
Caution
Read “Statement of Intended Use” on our website or in “Getting Started with PowerLab” before use.
Ordering Information:
MLT844 Physiological Pressure Transducer
(includes MLAC20 Interface Cable)
For use with:
Any ADInstruments Bridge Amp
SP2881 Transducer Bracket
Specifications
Operating pressure range: –20 to 300 mmHg
Maximum excitation: 15 V DC or AC
Sensitivity: 5 µV/V/mmHg
Non-linearity and hysteresis: 0.5% of full scale (maximum)
Output impedance: 1000 Ω
Input impedance: 700 Ω
Operating temperature range: +10 °C to +50 °C
Storage temperature range: –20 °C to +70 °C
Dimensions: 70 × 29 mm (2.8" x 1.2")
Cable length: 2.8 m (9.2')
Weight: 24 g (without cable)
Connections: 8-pin DIN
All specifications were tested at the time of printing and are subject to change.