Planer BT37 MarkII User manual

®
BT37 MarkII
Model No: BT37-02
Service Manual
© 2021 Planer Limited
Original Instructions
MA200606 1.0.0

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BT37 MarkII: Service Manual MA200606 1.0.0
Table of contents
1. Introduction 7
1.1 About the equipment .................................................................................................... 8
1.1.1 Theory of operation .................................................................................................. 8
1.1.2 Front view ................................................................................................................. 9
1.1.3 Side view .................................................................................................................. 9
1.1.4 Rear view ................................................................................................................ 10
1.1.5 User interface ......................................................................................................... 10
1.1.5.1 Numeric entry .......................................................................................................................................... 11
1.1.5.2 Menus ....................................................................................................................................................... 12
1.1.6 Status and alarm indicators ................................................................................... 12
1.1.6.1 Acknowledging an alarm ...................................................................................................................... 13
1.2 Intended use ................................................................................................................. 13
1.3 Safety ............................................................................................................................ 13
1.3.1 Warnings ................................................................................................................ 13
1.3.2 Precautions ............................................................................................................. 14
1.3.3 Electromagnetic compatibility (EMC) precautions ................................................ 14
1.4 Symbols ......................................................................................................................... 15
1.4.1 Symbols used in manual ......................................................................................... 15
1.4.2 Symbols used on equipment .................................................................................. 15
1.5 Equipment list .............................................................................................................. 16
1.6 Spare parts ................................................................................................................... 16
1.7 Changing the IP address .............................................................................................. 17
2. Operation 21
2.1 Setting the access code ............................................................................................... 22
2.2 Changing the control settings ..................................................................................... 23
2.2.1 Gas flow ................................................................................................................. 23
2.2.1.1 Non-pulsed bleed flow .......................................................................................................................... 24
2.2.1.2 Pulsed bleed flow ................................................................................................................................... 24
2.3 Installing the humidifier .............................................................................................. 24
2.3.1 Single tube bottle humidifier .................................................................................. 26
2.3.2 Three tube bottle humidifier .................................................................................. 30
2.4 Switching off ................................................................................................................ 34
3. Component replacement 35
3.1 Opening the BT37 ........................................................................................................ 36
3.2 Lid seal .......................................................................................................................... 39
3.3 Upper heater ribbon cable .......................................................................................... 40
3.4 External air filter .......................................................................................................... 46
3.5 Internal air filter ........................................................................................................... 47
3.6 Fan ................................................................................................................................. 48

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BT37 MarkII: Service Manual MA200606 1.0.0
Table of contents
3.7 Fuse ............................................................................................................................... 49
3.8 Gas valve replacement ................................................................................................ 51
3.9 Battery .......................................................................................................................... 53
3.10 Humidifier ..................................................................................................................... 54
3.11 Left humidifier pcb ...................................................................................................... 56
3.12 Right humidifier pcb .................................................................................................... 57
3.13 Lower heater plate ...................................................................................................... 58
3.14 Upper heater plate ...................................................................................................... 62
3.15 Mains inlet filter ........................................................................................................... 67
3.16 Motherboard ................................................................................................................ 71
3.17 Display ........................................................................................................................... 75
3.18 Power supply ................................................................................................................ 76
3.19 Hinge adjustment ......................................................................................................... 82
3.20 Presetting rotary damper ........................................................................................... 85
4. Maintenance and trouble shooting 89
4.1 Fault finding ................................................................................................................. 90
4.2 Gas leak test ................................................................................................................. 97
4.3 Maintenance schedules ............................................................................................... 99
4.3.1 12 months ............................................................................................................... 99
4.3.2 Three year ............................................................................................................ 101
4.3.3 Seven year ............................................................................................................ 101
5. Condensation 103
6. Programming the BT37 MarkII 105
7. Regular checks 109
8. General cleaning 111
9. Resetting the access code 113
10. Cleaning and disinfecting the chamber 115
11. Checking the liquid level indicator 117
12. Checking the battery 119
13. Calibration and servicing 121
14. Safety testing 123
15. Testing the alarms 125

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BT37 MarkII: Service Manual MA200606 1.0.0
Table of contents
16. Flow calibration 127
17. Temperature calibration 129
18. Configuring BT37 toolbox for automatic calibration 131
19. Calibration using automatic calibration kit 135
20. Configuring BT37 toolbox for manual calibration 149
21. Manual calibration 153
22. Diagrams and schematics 163
22.1 Pneumatic block diagram ......................................................................................... 165
22.2 BT37 MarkII exploded diagram ................................................................................. 166
23. Additional information 167
23.1 External alarm connection ........................................................................................ 168
23.2 Network security ....................................................................................................... 168
23.3 Specification ............................................................................................................... 169
23.3.1 Control .................................................................................................................. 169
23.3.2 Capacity ................................................................................................................ 169
23.3.2.1 Power ...................................................................................................................................................... 169
23.3.2.1.1 Internal battery .............................................................................................................................. 169
23.3.3 Humidifier bottle and filter .................................................................................. 170
23.3.4 Gas supply ............................................................................................................ 170
23.3.5 External alarm connections .................................................................................. 171
23.3.6 Monitoring ............................................................................................................ 171
23.3.7 Fuses .................................................................................................................... 171
23.4 System ......................................................................................................................... 172
173
Index

Introduction

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BT37 MarkII: Service Manual MA200606 1.0.0
Introduction
1 Introduction
1.1 About the equipment
1.1.1 Theory of operation
The basic principle of operation is illustrated in the diagram below.
Samples are placed in dishes in the left and right chambers which are heated to
maintain a constant temperature. Pre-mixed gas is supplied from a pressurised cylinder,
bubbled through water contained in the humidifier bottle, and then passed to the left and
right chambers. This results in the samples being maintained at a controlled temperature
and within a controlled atmosphere.
If the lids are opened and then shut again, gas is provided at an increased flow rate to
reduce the time taken to restore the chambers back to the required gas concentration.
The BT37 can be in one of three modes: Standby, Run and Bottle change.
Mode Heaters Gas Note
Standby Off Off The system is
inactive and ready to
be switched off.
Bottle change On Off The system is
waiting for the
humidifier to be
changed.
Run Controlled Controlled This is the normal
operating state.

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BT37 MarkII: Service Manual MA200606 1.0.0
Introduction
1.1.2 Front view
1. Chamber lid and catch.
2. Humidifier lid.
3. Status indicators.
4. Touchscreen display.
5. Liquid level indicator.
The lids are fitted with rotary catches.
1. To open a lid, rotate the knob anticlockwise and lift the lid.
2. To close a lid, rotate the knob so it can engage with the pin on the main body, then
gently lower the lid, and when it is fully closed, rotate the knob clockwise until it is
felt to latch.
The BT37 will not regard a lid as being shut until it is both closed and the knob rotated
clockwise into its locked position.
1.1.3 Side view
1. Rear of base monitoring port for independent temperature probes.
2. Lid monitoring port for independent temperature probes.
3. Front of base monitoring port for independent temperature probes.

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BT37 MarkII: Service Manual MA200606 1.0.0
Introduction
1.1.4 Rear view
1. Mains inlet.
2. Premixed gas inlet
3. Daisy-chain gas outlet
4. Alarm output.
5. Reset switch.
6. Ethernet output.
7. Access ports for pH monitoring; for use by service personnel only.
1.1.5 User interface
The BT37 is provided with a resistive touchscreen interface.
When the system is idle, the standby screen is shown.
Pressing the Run button, moves the BT37 out of standby and into its normal operating
mode.
In normal operation, the display shows the current status of the incubator. Pressing the
Display button cycles through different screens, each of which shows different
information about the state of incubator. An example is shown below.