Bruker BioSpin NMR BVT3200 User manual

NMR Spectroscopy
Bruker BioSpin
think forward
Version
BVT3200
Variable Temperature Unit for BSMS/2
Technical Manual
002

The information in this manual may be altered without notice.
BRUKER BIOSPIN accepts no responsibility for actions taken as a result of use of
this manual. BRUKER BIOSPIN accepts no liability for any mistakes contained in
the manual, leading to coincidental damage, whether during installation or
operation of the instrument. Unauthorised reproduction of manual contents,
without written permission from the publishers, or translation into an other
language, either the entire manual or a part of it, is forbidden.
This manual describes the units as they are at the date of printing. On request, the
manufacturer shall supply circuit diagrams, lists of components, descriptions,
calibrating instructions and any other information for use by qualified personnel of
the user, in charge of repairing the parts of the unit which have been stated by the
manufacturer to be "repairable". Such supply shall in no event constitute
permission to modify or repair the units or approval of the same.
All rights reserved for the units, circuits, processes and appellations mentioned
herein.
This unit is not designed for any type of use which is not specifically described in
this manual. Such use may be hazardous.
For further technical assistance on the BVT3200 unit, please do
not hesitate to contact your nearest BRUKER dealer or contact
us directly at:
BRUKER BioSpin SA
34 rue de l’Industrie
F-67166 Wissembourg Cedex
France
Phone: + 33 388 066 000
Fax: + 33 388 736 820
Email: [e-mail]
Internet: www.bruker.com
This manual was written by
This manual was edited and desktop published by
© January 13, 2009: Bruker BioSpin SA
Wissembourg, France
Patrick Krencker and Daniel Podadera
Karine Hollender and Dominique Wurtz
P/N: Z31544
DWG-Nr: 1251.002

Technical Manual Version 002 BRUKER BIOSPIN 3 (55)
Contents
Contents ............................................................................ 3
1 Description ......................................................................... 5
1.1 Introduction ........................................................................................ 5
1.2 BVT3200 main components ................................................................ 7
1.3 Parts location ..................................................................................... 7
1.4 Principle of operation .......................................................................... 7
1.5 The front panel ................................................................................... 8
Front panel description : ............................................................ 8
1.6 Gas flow circuit ................................................................................... 9
Setting up the default gas flow ....................................................... 9
1.7 Front panel connectors ..................................................................... 11
Heater connector ......................................................................... 11
PT100 connector .......................................................................... 11
Thermocouple connector .............................................................. 12
RS232 connector ......................................................................... 13
N2connector (option) ................................................................... 13
BCU05 connector ......................................................................... 14
BVTB 3500 connector .................................................................. 14
2 Options ............................................................................. 17
2.1 Low temperature options .................................................................. 17
2.2 LN2exchanger ................................................................................. 17
Exchanger presentation ............................................................... 18
Exchanger installation .................................................................. 18
2.3 LN2evaporator ................................................................................. 19
Evaporator presentation ............................................................... 19
Evaporator installation ................................................................. 20
Printed circuit installation ............................................................. 20
2.4 BCU05 gas cooler ............................................................................ 22
3 Configuration ................................................................... 23
3.1 Sensor selection ............................................................................... 23
3.2 Eurotherm 2416 configuration ........................................................... 23
4 Remote interface control ................................................. 25
4.1 Microcontroller interface ................................................................... 25
4.2 Digital interface specifications .......................................................... 25
4.3 Commands and communication protocol ........................................... 26
4.4 Control characters ............................................................................ 26
4.5 List of commands ............................................................................. 27
4.6 RS232 link characteristics ................................................................ 28

4 (55) BRUKER BIOSPIN Technical Manual Version 002
Contents
4.7 RS232 cable .................................................................................... 28
4.8 Authorised functions ......................................................................... 29
AF - Air Flow ............................................................................... 30
CM - Check Memory (for test only) .............................................. 31
CO - Communications Speed ....................................................... 31
DL - Download ............................................................................. 32
DT - DAC Check (for test only) .................................................... 32
ES - Error Status ......................................................................... 33
HP - Heater Power ...................................................................... 34
IS - Interface Status ..................................................................... 35
NH - Nitrogen Heater ................................................................... 36
NP - Nitrogen Heater Power ........................................................ 37
P1 - Port 1 (for test only) ............................................................. 38
P2 - Port 2 (for test only) ............................................................. 39
P3 - Port 3 (for test only) ............................................................. 40
P4 - Port 4 (for test only) ............................................................. 41
RB - Read BBIS .......................................................................... 42
SV - Software Version .................................................................. 43
WB - Write BBIS .......................................................................... 44
WR - Write Record ...................................................................... 45
XR (Extract a record) ................................................................... 46
5 Technical specifications ...................................................47
5.1 Specifications ................................................................................... 47
5.2 Safety fuses ..................................................................................... 48
Figures ............................................................................. 49
Tables ............................................................................... 51
Index ................................................................................. 53

Technical Manual Version 002 BRUKER BIOSPIN 5 (55)
1
Description 1
Introduction 1.1
The new BVT3200 (P/N: W1101264) is a small size variable temperature unit on
single double europe size board.
It has microcontroller interface for remote control by the host computer.
The unit includes:
•A temperature controller (EUROTHERM model 2416).
•The microcontroller and its electronics and the power electronics for the probe
heater.
•A gas flow circuitry (pressure regulator and a block of four valves for gas flow
control).
The unit is ready to receive an option board for low temperature - LN2evaporator
or heat exchanger.
The BVT3200 is supplied by the general power supply of the BSMS/2 crate. The
power stage is supplied by an additional 48 V power supply board.

6 (55) BRUKER BIOSPIN Technical Manual Version 002
Figure 1.1. BVT3200 block diagram
0/48V
CPU
µ CONTROLLER
RAM FLASH PROM
RS232
INTERFACE
Power supply connector
POWER
Option
LN2 EVAPORATOR
or LN2
EXCHANGER
board
Opto coupleurs
5V
0V
24V
EUROTHERM 2416
TEMPERATURE
CONTROLLER
BSMS/2 BACKPLANE
48V
POWER SUPPLY
BOARD
0V
48V
PRESSURE
REGULATOR
VALVE
BLOCK
GAS FLOW
DETECTION
0V
48V
DC
DC
GAS OUT GAS IN
BTO P.S.LN2
HeaterBCU05RS232
T
PT100
General Power Supply
or
BTO2000
or
STAGE
SAFETIES
X0V
X5V
Thermocouple
RS232
200VA : Z002783 400VA : Z002840
0V
+15V
+15V
0V
-15V
0V
BVTB3500

Technical Manual Version 002 BRUKER BIOSPIN 7 (55)
BVT3200 main components
BVT3200 main components 1.2
The interface board has a microcontroller for remote control of the BVT3200. Two
RS232 ports are available on this printed circuit. One port, on the front panel side,
is for the communication with host computer and the other for communication with
the Eurotherm 2416 temperature controller.
The power supply connector is at the rear side of the board. On the front, a gas
flow indicator with a steel ball detects the gas flow. A device, called valve block, is
a group of four valves which control the gas flow rate.
Parts location 1.3
Figure 1.2. Parts location (top view)
Principle of operation 1.4
The sample tube located in the magnet is heated by a constant gas flow delivered
by the BVT3200. A temperature sensor (e.g. a Thermocouple T) under the sam-
ple tube measures the gas temperature and the temperature controller compares
the actual temperature to the target temperature programmed by the operator. It
controls the power applied to the heater placed at the base of the magnet in order
to stabilise the gas temperature. A special gas flow switch monitors continuously
the gas flow in the BVT3200 and switches off the probe heater when the gas flow
is missing. A safety thermocouple measures also the heater temperature and
avoids probe overheating in case of missing gas flow in the probe.
Pressure regulator
Eurotherm Controller
Valve block
Location of
temperature
option board

8 (55) BRUKER BIOSPIN Technical Manual Version 002
The front panel 1.5
Front panel description :
1. Eurotherm 2416 controller
2. Thermocouple connector type T
3. PT100 connector or BTO2000
4. Gas IN
5. BT02000 power supply or BVTB3500
6. BCU05 connector
7. Gas OUT
8. RS232 connector
9. N2 connector
10. Heater connector
Figure 1.3. BVT3200 front panel
7
8
9
10
1
2
3
4
5
6
RS 232
GAS OUT
GAS IN
PT100
BVTB 3500
BTO P.S.or
BCU05
N2
HEATER
EUROTHERM 2416
T
CP
CONST -
+
BSMS/2
ECL00
BVT3200

Technical Manual Version 002 BRUKER BIOSPIN 9 (55)
Gas flow circuit
Gas flow circuit 1.6
On the middle of the PC (printed circuit) a pressure regulator delivers gas at
constant pressure to a group of valves. Each valve, when open, let the gas flow
through a calibrated hole. As all valves are in parallel, it is possible to obtain 15
different gas flow rates.
The regulator is factory adjusted to obtain approximately 2000 l/h when all valves
are open.
The default value at power on can be changed by hardware jumpers (JP12 and
JP13) see figure "Valve jumpers settings" on page 41.
An optical gas flow sensor detects the presence of the gaz flow.
Figure 1.4. Gas flow circuit
Setting up the default gas flow 1.6.1
Connect the BVT3200 gas input to a dry air or a N2gas supply line. The inlet pres-
sure must be at least 4 bar and not exceed 7 bar. The default gas flow rate after
power on is defined according to the settings of jumpers JP12 and JP13 located
between the temperature controller and the valve block.
The gas flow rate may also be changed in the "EDTE" program on the
spectrometer.
When a jumper is placed it is read as "0" and the valve is CLOSED (no gas flow).
A missing jumper is interpreted as "1" and the valve is OPEN (gas flow).
•V4 is the valve with the lowest throughput
•V1 is the valve with the highest throughput
•The factory setting for the default flow is 270 l/h
GAS
FLOW
SWITCH
CALIBRATED HOLEPRESSURE REGULATOR
GAS IN
VALVE CONTROL
VALVE
GAS OUT
VALVE BLOCK

10 (55) BRUKER BIOSPIN Technical Manual Version 002
Table 1.1. Default gas settings
Table 1.2. Default gas flow versus jumper settings
Jumper Valve Pins to short Factory setting (270l/h)
JP12 V4 pin 1(Gnd) - pin 2 Jumper placed
JP12 V3 pin 3(Gnd) - pin 4 No jumper
JP13 V2 pin 1(Gnd) - pin 2 Jumper placed
JP13 V1 pin 3(Gnd) - pin 4 Jumper placed
Combination V1 V2 V3 V4 Flow rate (l/h)
00000 0
1 0 0 0 1 135
2 0 0 1 0 270
3 0 0 1 1 400
4 0 1 0 0 535
5 0 1 0 1 670
6 0 1 1 0 800
7 0 1 1 1 935
81000 1070
91001 1200
10 1 0 1 0 1335
11 1011 1470
12 1 1 0 0 1600
13 1 1 0 1 1735
14 1 1 1 0 1870
15 1 1 1 1 2000

Technical Manual Version 002 BRUKER BIOSPIN 11 (55)
Front panel connectors
Front panel connectors 1.7
Heater connector 1.7.1
The heater cable is plugged in this connector. A safety thermocouple is located
close to the heater resistance in order to detect an overheating in case of a
missing gas flow for example.
Figure 1.5. Heater connector (Front view)
Table 1.3. Heater connector pin assignment
PT100 connector 1.7.2
Figure 1.6. PT100 connector (front view)
PIN SIGNAL
1heater +
2heater +
3safety thermocouple +
4safety thermocouple -
5heater -
6heater -
7gnd
43
2
16
57
1
43
2

12 (55) BRUKER BIOSPIN Technical Manual Version 002
Table 1.4. PT100 / BTO2000 connector pin assignment
Note : This connector is also used to connect the BTO2000. Pin 2 and 3 are used
as signal input pins.
Thermocouple connector 1.7.3
Figure 1.7. Thermocouple connector (Front view)
Table 1.5. Thermocouple T pin assignment
PIN PT100 BTO2000
1NCa
a. NC = not connected
/
2PT100 T-
3PT100 T+
4 IPT100 /
PIN SIGNAL
1(Cu) Shield
2(Cu) Thermocouple +
3(Co) Thermocouple -
TCP
CONST -
1
2
3
+

Technical Manual Version 002 BRUKER BIOSPIN 13 (55)
Front panel connectors
RS232 connector 1.7.4
Figure 1.8. RS232 male connector (Front view)
Table 1.6. RS232 connector pin assignment
N2connector (option) 1.7.5
Figure 1.9. N2connector (Front view)
Table 1.7. Evaporator connector pin assignment
PIN SIGNAL PIN SIGNAL
1NC 6NC
2RxD 7RTS
3TxD 8DTR
4NC 9NC
5GND
PIN SIGNAL COMMENT
1heater + power output (0 - 40 Vac)
2level sensor + level detection input (0 - 2,5 V)
3evaporator detection evaporator detected if grounded
4gnd ground (0 V)
5heater - ground power
6exchanger detection exchanger detected if grounded
12345
7986
4
3
2
1
6
5

14 (55) BRUKER BIOSPIN Technical Manual Version 002
BCU05 connector 1.7.6
Figure 1.10. BCU05 connector
Table 1.8. BCU05 connector pin assignment
BVTB 3500 connector 1.7.7
Figure 1.11. BVTB 3500 connector (Front view)
Table 1.9. BVTB 3500 connector pin assignment
PIN SIGNAL COMMENT
1heater on (output) turns on the BCU05 when high (> 2,4 V)
2dgnd digital ground
3nc not connected
PIN SIGNAL DIRECTION COMMENT
A+5V Odigital Vcc output
CNC --- reserved
Egnd_BTO OBTO2000 has an isolated supply GND
G+15 v_BTO OBTO2000 has an isolated supply output +15V
JNC --- reserved
Ldgnd Odigital ground
Msda I/O I2C bus data line
N scl I/O I2C bus clock line
Opower control O0 to 10 volt heater power control output
3
2
1
J
E
C
E
O
N
MU
L
G
PR
S
T

Technical Manual Version 002 BRUKER BIOSPIN 15 (55)
Front panel connectors
The BVTB3500 is a power booster for the BVT3200.
Ppgnd Opower ground
Rpgnd Opower ground
Sthermocouple Isafety thermocouple input
Tb_relay OBVTB 3500 heater relay command
Ub_connected Iif grounded BVTB 3500 is detected
PIN SIGNAL DIRECTION COMMENT

16 (55) BRUKER BIOSPIN Technical Manual Version 002

Technical Manual Version 002 BRUKER BIOSPIN 17 (55)
2
Options 2
Low temperature options 2.1
For sample temperature control below room temperature one must use cold gas.
The BVT3200 can drive several devices for cold gas production :
•LN2heat exchanger
•LN2evaporator
•BCU05 gas cooler
The nitrogen level in the dewar is monitored by the VTU and the power level
applied to the LN2heater is computer controlled. For both first options, an optional
printed circuit must be installed. The LN2heater cable or the exchanger cable is
plugged in the N2connector on the front plate.
LN2exchanger 2.2
This device allows to extend sample temperature control below room
temperature. A nitrogen gas supply line is required for this device. The N2gas is
cooled while passing in a heat exchanger tube which soaks in liquid nitrogen. The
cold gas is then transferred to the probe by a flexible isolated transfer line.
The gas flow is stopped (it means all four valves are closed in the BVT3200)
whenever the heater power is off, avoiding sample freezing.
A printed circuit (PC) must be installed in the VT unit.
The printed circuit has the part number W1101455. It is plugged on the main
printed circuit and fixed by four plastic spacers.
Temperature accuracy is unchanged.

18 (55) BRUKER BIOSPIN Technical Manual Version 002
Exchanger presentation 2.2.1
Figure 2.1. Exchanger principle
Exchanger installation 2.2.2
1. Turn off the BSMS/2 power supply
2. Wait 2 minutes to permit the complete discharge of the output capacitor of the
heater electronics.
3. Unscrew and remove the BVT3200 from the crate.
4. Disconnect the inlet gas tube (see Figure 2.3. on page 20).
5. Hold the printer circuit (W1101455) over the main printed circuit, the big male
connector on the bottom side of the printed circuit must face the same size
female connector of on the top main printed circuit. The 4 plastic spacers must
be pushed carefully in the corresponding holes of the main board until they are
locked (see Figure 2.4. on page 21).
6. Plug the gas tube as shown in picture 3 (see Figure 2.5. on page 21).
7. Insert the BVT3200 in the BSMS/2 crate.
8. Plug the LN2exchanger cable in the N2 connector and insert the exchanger in
the LN2dewar.
9. Turn on the power supply of the BSMS/2.
Exchanger coil
Liquid nitrogen
Dewar tank
Refill level sensor
Empty level sensor
Valve block
Transfer line
N2gas in Cold N2out
BVT3200

Technical Manual Version 002 BRUKER BIOSPIN 19 (55)
LN2evaporator
LN2evaporator 2.3
This device is a cold nitrogen gas generator for low temperature experiments. The
nitrogen gas is produced by evaporating the liquid nitrogen contained in a dewar.
The power delivered to the heater, controlled by software, may reach 210 Watts
(approx. 38 V on a 7 ohm heater). The cold gas is transferred to the probe trough
a flexible and isolated transfer line.
For this device, an option printed circuit (PC) must be installed in the BVT3200. It
delivers the power applied on the LN2 heater. The LN2level in the dewar is
continuously monitored by the VTU.
This PC has the part number W1101455. It is plugged on the main board of the
BVT3200 and is retainded by four plastic spacers.
Temperature accuracy is unchanged.
WARNING : The BSMS/2 must be equipped with a 48V/400VA power supply
(Z002840) to use the LN2evaporator option. When a standard 48V/200VA power
supply is present in the rack, the rear side must be unscrewed and removed to
replace the power supply located beside the BVT3200.
Evaporator presentation 2.3.1
Figure 2.2. Evaporator principle
Heater
Liquid nitrogen
Dewar tank
Refill level sensor
Empty level sensor
Transfer line
Cold N2out
Cable to BVT3200

20 (55) BRUKER BIOSPIN Technical Manual Version 002
Evaporator installation 2.3.2
1. Turn off the BSMS/2 power supply.
2. Wait 2 minutes to permit the complete discharge of the output capacitor of the
heater electronics.
3. Unscrew and remove the BVT3200 from the crate.
4. Disconnect the inlet gas tube (see Figure 2.3. on page 20).
5. Hold the printer circuit (W1101455) over the main printed circuit, the big male
connector on the bottom side of the printed circuit must face the corresponding
female connector on the component side of the main printed circuit. The 4
plastic spacers must be pushed carefully in the corresponding holes of the
main board until they are locked (see Figure 2.4. on page 21).
6. Plug the gas tube as shown in picture 3 (see Figure 2.5. on page 21).
7. Insert the BVT3200 in the BSMS/2 crate.
8. Plug the LN2evaporator cable in the connector N2and insert the evaporator
accessory in the LN2dewar.
9. Turn on the power supply of the BSMS/2.
Printed circuit installation 2.3.3
To dismount the gas tube, push forward the gas connector ring and pull back the
tube.
Figure 2.3. Dismount the gas tube