Bruker BVTE3900 User manual
BRUKER
Version
BVTE3900
Technical Manual
003
The information in this manual may be altered without notice.
BRUKER accepts no responsibility for actions taken as a result
of use of this manual. BRUKER accepts no liability for any mis-
takes contained in the manual, leading to coincidental damage,
whether during installation or operation of the instrument. Un-
authorised reproduction of manual contents, without written
permission from the publishers, or translation into another lan-
guage, either in full or in part, is forbidden.
This manual was written by
Patrick KRENCKER
© March 31, 2000: Sadis Bruker Spectrospin
Wissembourg, France
P/N: Z31448
DWG-Nr: 1158003
Technical Manual Version 003 BRUKER 3 (41)
Contents
Contents ............................................................... 3
Index ..................................................................... 5
1 Safety ...................................................................... 7
1.1 Protective ground ................................................................ 7
1.2 Repair and adjustment ......................................................... 7
2 Description ............................................................. 9
2.1 Introduction ......................................................................... 9
2.2 Description of the BVTE3900 ............................................... 9
Coolant circuit ..................................................................9
Power booster ................................................................10
2.3 BVTE3900 front view ......................................................... 13
2.4 Installation ......................................................................... 13
Using a BVT3000 with BVTE3900 ..................................14
Using a BVT2000 with BVTE3900 ..................................14
2.5 Filling up the coolant ......................................................... 14
2.6 Drain the tank .................................................................... 15
2.7 High temperature operation ............................................... 15
2.8 Low temperature operation ................................................ 15
2.9 Probe dismounting ............................................................. 16
2.10 Safeties ............................................................................. 16
2.11 Connectors ........................................................................ 17
Heater connector ...........................................................17
BVT3000 connector .......................................................18
Probe Pt100 connector ..................................................19
Level switch connector ...................................................20
2.12 BVT2000 heater connector ................................................ 21
3 Technical specifications....................................... 23
3.1 Specifications .................................................................... 23
3.2 Safety fuses ...................................................................... 24
4 Schematics ........................................................... 25
5 Option LTE ............................................................ 31
5.1 LTE Topview ...................................................................... 32
5.2 Connector ......................................................................... 34
Technical Manual Version 003 BRUKER 5 (41)
Index
B
BVT2000............................................................................................................... 9
BVT3000............................................................................................................... 9
C
Coolant............................................................................................................ 9, 14
F
Figures................................................................................................................ 37
Fuse............................................................................................................ 23 – 24
fuse ..................................................................................................................... 22
Fuses locations................................................................................................... 24
P
Purge................................................................................................................... 15
S
Schematics.......................................................................................................... 25
Setting overheating threshold jumpers................................................................ 14
T
Tables ................................................................................................................. 39
V
Vacuum................................................................................................. 13, 15 – 16
W
W3L124546......................................................................................................... 35
W3S124903 A..................................................................................................... 36
W4S110377 A..................................................................................................... 26
W4S110378 A..................................................................................................... 27
W4S110379 A..................................................................................................... 28
Technical Manual Version 003 BRUKER 7 (41)
1
Safety 1
The following general safety instructions must be observed during operation,
service and repair of this instrument.
Protective ground 1.1
To minimize shock hazard the instrument must be connected to an electrical
ground. Do not use extender cables without earth conductor. Do not disconnect
the protective ground inside the instrument.
Repair and adjustment 1.2
Ensure that the instrument is disconnected from the AC power supply before the
covers are removed or fuses are replaced, otherwise dangerous voltages are ac-
cessible.
For fault finding the AC power supply may require reconnection. This may only be
carried out by skilled personal who are aware of the hazard involved.
Technical Manual Version 003 BRUKER 9 (41)
2
Description 2
Introduction 2.1
The BVTE3900 (P/N W1208962) is a cooling system for high temperature NMR
probes.
It works in conjunction with a temperature controller (BVT3000 or BVT2000) with
an «E» thermocouple input, and allows to work at high temperature (above
150 °C).
It can be used as well for standard or even low temperature.
The system has a cooling circuit, power electronics and safeties.
The cooling system comprises a cooling liquid tank and a circulating pump and
safeties to prevent probe overheating.
The power electronics is mainly composed by a power booster driven by the digit-
al temperature unit BVT3000.This unit is fully controlled by the driving unit tem-
perature unit. The power electronics provides the power to the heater according a
command signal issued by the BVT3000. When the BVTE3900 is connected to
the BVT3000 and switched on the power stage of the VTU is disabled.
The power booster is by-passed when used with BVT2000.
A special version of the BVTE3900 called BVTE3900 LTE (P/N : W1209799) is
available, see chapter "Option LTE" on page 31.
It is intended only for low temperature applications. This system avoids freezing of
the probe housing. It works with a BVT3000 or a BVT2000.
Description of the BVTE3900 2.2
Coolant circuit 2.2.1
A tank contains 5 litres of coolant. The circulating pump is on when the line switch
is on and the liquid level is correct in the tank. A flow sensor monitors continuously
the flow. The coolant coming back from probe is air-cooled by an heat exchanger
with fan.
10 (41) BRUKER Technical Manual Version 003
Description
Figure 2.1. Liquid and gas circuit
Power booster 2.2.2
A main printed circuit is the power booster for the heater. It can deliver up to 500
watts heating power.
A main toric transformer supplies the electronics and the thyristor bridge.
PRESSURE
REGULATOR
FLOW SENSOR
VACUUM
PUMP
FAN
BVT3000
PROBE
WATER
PUMP FLOW VALVE
LEVEL
SWITCH
LN TANK VENT
TRANSFER LINE
VACUUM
FLOWMETER
IN
OUT
GAS IN
GAS OUT
VACUUM
EXHAUST
GAS IN
VALVE
COOLANT
TANK
LN2 HEATER
HEAT
EXCHANGER
LN2
TANK
PRESSURE
REGULATOR
VACUUM
vacuum adjust
Technical Manual Version 003 BRUKER 11 (41)
Description of the BVTE3900
The heater is turned on when the relay is closed. When an overheat fault (over-
heating of heater by missing gas flow or safety thermocouple break for example)
occurs the relays turns off and heating is stopped.
The thyristor bridge, for heater power control, is placed on the case with a heat
sink. The voltage delivered to the heater is filtered by a coil to reduce voltage rip-
ple.
On the front panel, a red led lights when the heater is on when using a BVT3000.
Figure 2.2. BVTE3900 power electronics block diagram
Power regulation
HEATER
U x I
TRANSFORMER
THYRISTOR BRIDGE
WITH PHASE
CONTROL
POWER
COMMAND
INPUT
RELAY
COMMAND
INPUT
AC LINE
THERMO-
COUPLE
OUTPUT
SAFETY THERMOCOUPLE
HEATER
RELAY
SHUNT
A
DC POW-
ER SUP-
PLY
12 (41) BRUKER Technical Manual Version 003
Description
Figure 2.3. BVTE3900 top view
1
2
3
4
5
6
7
8
9
10
11
VACUUM ADJUST
FLOW VALVE
TANK COVER SCREWS
1 2
Pt100 PROBE
PUMP AND FAN FUSE
BVT3000 CONNECTOR
BVT2000 HEATER
PROBE HEATER
LEVEL SWITCH
LN TANK VENT
VACUUM
GAS IN
WATER HOSES
TANK
12
13
14
3
4
5
6
7
8
9
10
111213
14
15
MAINS
15
16
16 FLOW SENSOR
Technical Manual Version 003 BRUKER 13 (41)
BVTE3900 front view
BVTE3900 front view 2.3
Figure 2.4. BVTE3900 front view
Installation 2.4
Open the cover top of the system, cables and hoses are inside.
The BVTE3900 includes flexible hoses approximately 7 meters long. Connect the
two water hoses to the high temperature probe. The hoses are marked «IN» and
«OUT», connect them on the probe plugs with the same mark.
Connect the mains cable.
Connect the Pt100 sensor on probe.
Connect the heater to probe and BVTE3900.
Connect compressed air on gas in nipple.The compressed air (approx. 6 bar) is
for driving the venturi vacuum pump and draining the liquid circuit.
Connect the vacuum pump hose to the probe.
1
2
3
4
PROBE TEMPERATURE
HEATER LED
WATER LEVEL
VACUUM PUMP FLOW INDICATOR
1
2
3
4
14 (41) BRUKER Technical Manual Version 003
Description
Using a BVT3000 with BVTE3900 2.4.1
Connect the cable between BVT3000 (plug marked BVTB3500 on front panel)
and plug unit.
The BVT3000 must be equipped with a «E» thermocouple input connector, and
this sensor must be selected in the temperature controller configuration. This ther-
mocouple type is installed in high temperature probes.
For very high temperature experiment up to 600 °C (878K) it is necessary to
close two jumpers (JP11 AND JP12) on the main board of BVT3000 (board
W4P110276C). They select the higher overheating temperature threshold.
Inside the BVTE3900 connect the 2 «FASTON» plugs of the heater output cable
to make the connections A-C and B-D as shown in figure "BVTE3900 wiring dia-
gram" on page 22 (bottom).
The heater CONNECTOR 1 must be installed on the top panel.
This configuration is normally factory set.
Using a BVT2000 with BVTE3900 2.4.2
A slight change of the internal wiring in BVTE3900 is necessary.
Step1) Dismount the cover plate which holds all plugs. The plug (9) "PROBE
HEATER" must be dismounted from the cover plate and the cable disconnected
from the printed circuit and removed.
Step 2) The spare plug located at the end of the cable attached to plug (7)
"BVT2000 HEATER" must be installed at same place.
Step 3) Disconnect the wires with "FASTON" terminations near the plug (7) and
make the connection of the wires A to E and B to F as shown in figure
"BVTE3900 wiring diagram" on page 22. They are coming from the right side
near the electrical fan.
Step 4) Install then the special heater cable between the BVT2000 and the
BVTE3900 (part number W1100628). Connect it on the rear side of BVT2000
plug marked "HEATER" and plug (7) "BVT2000 heater" on BVTE3900.
Connect, if necessary, the "E " type thermocouple coming from probe on the "E"
input on rear side of the BVT2000 and select the same thermocouple type in the
temperature controller configuration.
When this wiring is done, the BVT2000 provides the heater power. The heater led
is now disabled. The safeties included in BVTE3900 become active (coolant flow
and probe heater overheating monitoring). In case of a failure or problem, it
means that the safety thermocouple signal loop is open which turns off immedi-
ately the heater in the BVT2000.
Filling up the coolant 2.5
The tank must be filled with approximately 5 litres of coolant. The cooling is a mix-
ture of pure water and ethylene-glycol. The system is delivered with 3 cans which
must be poured in the tank (we recommend GLACELF from ELF, BRUKER part
Technical Manual Version 003 BRUKER 15 (41)
Drain the tank
number 58477). This coolant gives a protection against corrosion of the cooling
system and production of algae in the water.
Inside the tank a mark shows the upper level of coolant.
The coolant must be changed every year.
Drain the tank 2.6
•Turn off the power switch.
•Turn the flow valve on position «DRAIN». Wait a few minutes until you hear a
bubbling in the tank, during that the time the purge of the probe head is carried
out.
•Turn the flow valve now on position «FLOW»
•Disconnect flexible hose «IN» from probe.
•Put the hose’s end in a bucket and start the pump. Wait until the tank is empty.
When the cover of the tank is removed from tank, the safety level switch disa-
bles the pump. To enable pumping lay the top cover backwards.
•When the tank is empty, switch off the BVTE3900. Turn the switch on position
«DRAIN» for a while, the rest of liquid in the hose will be drained.
High temperature operation 2.7
•See first the technical manual of your high temperature probe.
•The cooling liquid circuit must be connected on probe.
•Turn the flow valve on position «FLOW».
•Switch on the BVT3000 and BVTE3900.The pump starts and coolant circu-
lates through the probe.
•The purpose of the vacuum pump is to extract the hot gas from the probe in or-
der to reduce temperature gradient along the sample tube. Adjust the vacuum
with the knob located on top. Set the flow rate to approximately 500 litres/hour
(flowmeter ball at 1/3 of full scale).
Low temperature operation 2.8
•The BVT3900 is suitable for working at low temperature. Making water circu-
lating in the probe avoids freezing of the probe head.
•The top of the LN2 evaporator tank is equipped with a cap. The cap must be
removed and the flexible hoset must be coupled to the LN vent nipple. In that
way the tank is always at atmospheric pressure whenever the BVTE3900 is
switched off to avoid freezing of probe when the BVTE3900 is off, while the
evaporator is on.
•Connect the transfer line from LN tank to probe.
•Connect the LN2 heater on BVT3000.
16 (41) BRUKER Technical Manual Version 003
Description
•Switch on the BVTE3900.
•Start VTU sample temperature regulation.
•In low temperature operation, the purpose of the vacuum pump is to avoid the
sample tube from being lifted by the N2 gas flow. Adjust vacuum pump to
500 l/h (flowmeter ball at 1/3 of full scale).
Probe dismounting 2.9
•Turn off the power line switch to stop the pump.
•Turn the switch on position «purge». Wait 3-5 minutes, during that the time the
purge of the probe head is carried out. See section "Drain the tank" on page
15.
•Remove the connectors and hoses.
Safeties 2.10
The following safeties prevent probe overheating when working at high tempera-
ture. In case of fault a relay opens the signal path of the heater safety thermocou-
plel.
1. The right water level in the tank is indicated when the green led on front side
lights. A low level in the tank disables the pump.
2. A water flow sensor monitors the water flow. When the flow is too low or miss-
ing it switches off the heater.
3. A Pt100 sensor measures the temperature inside the probe. When the temper-
ature exceeds a threshold (320 K) it switches off the heater.
4. The safety thermocouple located on heater measures the temperature of the
heater resistor. Missing gas flow while heating will produce an overheating that
switches off the heater.
If a fault occurs and switches down the heater, check the system (water level, gas
flow etc.) and restart the heater.
18 (41) BRUKER Technical Manual Version 003
Description
BVT3000 connector 2.11.2
Figure 2.6. BVT3000 connector (front view)
Table 2.2. BVT connector pin assignment
PIN SIGNAL NAME DIRECTION COMMENT
A +5V I digital VCC input
CNC --- reserved
E gnd_BTO I isolated GND for BTO2000 (reserved)
G +15 v_BTO I isolated +15V for BTO2000 (reserved)
JNC --- reserved
L dgnd I digital GROUND input
M sda I/O I2C bus data line
N scl I/O I2C bus clock line
O power control I 0 to 10 volt heater power control input
P pgnd I power ground
R pgnd I power ground
S thermocouple O safety thermocouple output
T b_relay I heater relay command input
U b_connected O «LOW»when BVE3900 is powered on
J
E
C
E
O
N
MU
L
GPR
S
T
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