NPI MTC-20/2S Operating Instructions And System Description Download Page 3

MTC-20/2S User Manual 

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version 2.7 

 

 

page 3 

1. Safety Regulations 

 

VERY IMPORTANT

:

 Instruments and components supplied by npi electronic are NOT 

intended for clinical use or medical purposes (e.g. for diagnosis or treatment of 
humans), or for any other life-supporting system. npi electronic disclaims any 
warranties for such purpose. Equipment supplied by npi electronic must be operated 
only by selected, trained and adequately instructed personnel. For details please consult 
the GENERAL TERMS OF DELIVERY AND CONDITIONS OF BUSINESS of npi 
electronic, D-71732 Tamm, Germany.

 

 
1)  GENERAL: This system is designed for use in scientific laboratories and must be 

operated by trained staff only. General safety regulations for operating electrical devices 
should be followed. 

 
2)  AC MAINS CONNECTION: While working with the npi systems, always adhere to the 

appropriate safety measures for handling electronic devices. Before using any device 
please read manuals and instructions carefully. 
The device is to be operated only at 115/230 Volt 60/50 Hz AC. Please check for 
appropriate line voltage before connecting any system to mains. 
Always use a three-wire line cord and a mains power-plug with a protection contact 
connected to ground (protective earth).  
Before opening the cabinet, unplug the instrument. 
Unplug the instrument when replacing the fuse or changing line voltage. Replace fuse 
only with an appropriate specified type. 

 
3)  STATIC ELECTRICITY: Electronic equipment is sensitive to static discharges. Some 

devices such as sensor inputs are equipped with very sensitive FET amplifiers, which can 
be damaged by electrostatic charge and must therefore be handled with care. Electrostatic 
discharge can be avoided by touching a grounded metal surface when changing or 
adjusting sensors. 

Always turn power off when adding or removing modules, 

connecting or disconnecting sensors, headstages or other components from the 
instrument or 19” cabinet.

 

 
4)  TEMPERATURE DRIFT / WARM-UP TIME: All analog electronic systems are 

sensitive to temperature changes. Therefore, all electronic instruments containing analog 
circuits should be used only in a warmed-up condition (i.e. after internal temperature has 
reached steady-state values). In most cases a warm-up period of 20-30 minutes is 
sufficient. 

 
5)  HANDLING: Please protect the device from moisture, heat, radiation and corrosive 

chemicals. 

 
6)  INSTRUMENT COOLING: To prevent damage from overheated components, adequate 

airflow around the heat sink in the rear of the instrument must be ensured. 

 

Summary of Contents for MTC-20/2S

Page 1: ...DESCRIPTION FOR THE MTC 20 2S TEMPERATURE CONTROL SYSTEM VERSION 2 7 npi 2006 npi electronic GmbH Hauptstrasse 96 D 71732 Tamm Germany Phone 49 0 7141 9730230 Fax 49 0 7141 9730240 support npielectron...

Page 2: ...ntents 1 Safety Regulations 3 2 MTC 20 2S Components 4 3 MTC 20 2S System 4 3 1 System Description 4 3 2 Description of the Front Panel 5 3 3 Rear Panel Elements 8 3 4 Electronic Control and Protectio...

Page 3: ...riate line voltage before connecting any system to mains Always use a three wire line cord and a mains power plug with a protection contact connected to ground protective earth Before opening the cabi...

Page 4: ...ystem guarantees low noise operation and has special protection features to prevent the preparation from damage The MTC 20 2S incorporates two electronic thermometers for small semiconductor sensors R...

Page 5: ...e type of the element in lowercase letters Then a short description of the element is given 1 DESIRED TEMP C potentiometer Potentiometer to set the working temperature of the controller system If the...

Page 6: ...to 5 INTEGRATION potentiometer Potentiometer to set the INTEGRATION parameter time constant of the temperature controller PI controller time range 50 ms 20 s 6 Display B Digital display to indicate t...

Page 7: ...the temperature determined by SENSOR A 13 sensitivity 10mV C 13 SENSOR A connector 8 pole connector for temperature SENSOR A This connector also provides the POWER OUTPUT 18 19 for the heating unit ma...

Page 8: ...onnectors Banana jack connectors for the heating unit This output supplies a maximum voltage of 12V DC and a maximum current of 1 A POWER OUTPUT is also available at the SENSOR A 13 and SENSOR B conne...

Page 9: ...control must be in good thermal connection with the heating wire If not overheating and damage may occur ALARM circuit The internal thermometer R2252 sensor inputs are protected by the sensor alarm ci...

Page 10: ...bled Modes of Operation Overview DIRECT MODE output voltage is set directly by the DESIRED TEMP C control Internal SENSOR mode output voltage is controlled by the PI controller using SENSOR A or SENSO...

Page 11: ...e the cabinet is always connected to protective earth green yellow wire The system can be grounded either via a BNC cable connected to INPUT or OUTPUT 10 mV C or via the blue OUTPUT GND connector 5 Co...

Page 12: ...__________________________________________________________________________________________________ Figure 4 Block diagram of the MTC 20 2S _____________________________________________________________...

Page 13: ...tage Please follow these instructions step by step to avoid problems in adjusting the instrument Turn all potentiometers to the most left position switch the MODE selector to the position SENSOR A or...

Page 14: ...rshoot Wait again until the steady state value is reached If the desired temperature is not reached first set the GAIN to a slightly higher level and then if necessary raise the INTEGRATION Note The s...

Page 15: ...pped with foam Starting temperature was 27 3 C Starting conditions were LIMITER set to 0 GAIN set to 0 INTEGRATION off 25 27 29 31 33 35 37 39 0 100 200 300 400 500 600 700 800 900 1000 time s tempera...

Page 16: ...s below 3 C not connected or broken sensor or above 45 C short circuited sensor Digital displays 3 1 2 digits XX X C temperature of SENSOR A or B or XX X V voltage at POWER OUTPUT COMMAND INPUT BNC co...

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