1. Manuals
  2. Brands
  3. MAPADA Manuals
  4. Medical Equipment
  5. M4 UV-VIS
  6. Technical manual

MAPADA M4 UV-VIS Technical Manual

Spectrophotometer
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
M4 UV-VIS Spectrophotometer
Technical
TM – 202001002
Manual
Shanghai MAPADA Instruments Co., Ltd.
Service Manual
Ver: V1.0.0
Date: June 28, 2020

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the M4 UV-VIS and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for MAPADA M4 UV-VIS

Summary of Contents for MAPADA M4 UV-VIS

  • Page 1 M4 UV-VIS Spectrophotometer Technical TM – 202001002 Service Manual Manual Shanghai MAPADA Instruments Co., Ltd. Ver: V1.0.0 Date: June 28, 2020...

  • Page 3: Table Of Contents

    Contents General information ..................................1 Safety Information ................................... 1 Danger and Warning Information ............................1 Warning Labels ..................................1 Overview ......................................3 Specifications .................................... 3 Function Diagram ..................................4 Structure ......................................4 Optical System ....................................8 Electronic Control System ................................10 Power System ..................................
  • Page 4 Remove monochromator cover ............................32 Replace 1# Reflector Mirror ............................... 33 Replace 2# Reflector Mirror ............................... 34 Replace 3# Reflector Mirror ............................... 36 Replace Grating ..................................38 Replace Filter Wheel ................................39 8.10 Replace Beam splitter ................................40 8.11 Replace Signal Board Block ..............................41 8.12 Replace Grating Motor ................................

  • Page 5: General Information

    1 General information 1.1 Safety Information This manual is used by technicians identified by MAPADA to troubleshoot M4 UV-VIS Spectrophotometers. Please read this manual in its entirety and pay attention to all danger and warning instructions. Failure to do so may result in serious personal injury or equipment damage.
  • Page 6 Warning Danger! Warning High voltage! Warning Hot! Recycle This instrument will be called back by the designated electrical equipment processing department or by the original manufacturer when wasted. Table 1-1 Warning labels...

  • Page 7: Overview

    2 Overview 2.1 Specifications Model Optical system Split beam，1200 l/mm grating Light source Flashing xenon lamp Detector Dual silicon photodiodes Spectral bandwidth Wavelength range 190~1100 nm Wavelength accuracy ±0.5 nm Wavelength Repeatability ≤0.3 nm Wavelength resolution 0.1 nm Wavelength selection Automatic Wavelength calibration Automatic calibration after power on...

  • Page 8: Function Diagram

    2.2 Function Diagram The function diagram of M4 UV-VIS Spectrophotometer is shown in Figure 2-1. The control and data processing unit of the instrument receives instructions from the user (input by touch or PC), controls the operation of each part, reads and processes the signal and output the measurement results.
  • Page 9 Sample room cover 830415 Hous ing 830401 Lamp room cover 830423 Sample Room baffle 830424 Display frame 830426 Rod head 830445 Power button 820201 830437 Touch screen 850101 Figure 3-1 Instrument exterior IEC Power Inlet 820101 Fuse seat 820701 FUSe 820601 Figure 3-2 Instrument back...
  • Page 10 Transit board 860501 Sample Room cover shaft 830429 Figure 3-3 Shell interior Main power supply 820302 Lamp room frame Sample room frame 830458 830450 Amplifier shield Monochromator cover 830462 830454 Figure 3-4 Instrument interior Figure 3-5 Internal functional areas...
  • Page 11 1# Reflector 810103 Flashing Xenon Lamp 840301 Figure 3-6 Lamp room 2# Reflector 810201 Grating component 810502 3# Reflector 810301 Filter Wheel motor 820503 Filter Wheel photoelectric switch 860301 Filter wheel Grating photoelectric 810602 switch 860302 Figure 3-7 Monochromator...

  • Page 12: Optical System

    Figure 3-9 Instrument bottom 4 Optical System The Optical system of M4 UV-VIS Spectrophotometer is shown in Figure 4-1. The polychromatic light, emitted by the xenon lamp, passes through 1# Reflector Mirror, the entrance slit, 2# Reflector Mirror, 3# Reflector Mirror and arrives at the grating. The...
  • Page 13 monochromatic light selected by grating scattering passes through 3# Reflector Mirror, the filter, exit slit, and splits into 2 beams by the beam splitter. One beam passes through 1# Lens, the sample cell, 2# Lens and arrives at the detector to form the measuring path, which is used to measure the samples.

  • Page 14: Electronic Control System

    5 Electronic Control System The electronic control system of M4 UV-VIS Spectrophotometer consists of 3 modules: power system, control and data processing system and signal processing system. 5.1 Power System M4 UV-VIS Spectrophotometer uses AC 100~240V, 50/60Hz. The power passes through the power socket with a EMI filter, the fuse, the power switch, and then connects to the switch power supply (Figure 5-1).

  • Page 15: Control And Data Processing System

    Table 5-1 Universal power description 5.3 Control and Data Processing System The control and data processing system of M4 UV-VIS Spectrophotometer is the core of the instrument. The control unit receives instruction from users (input by touch or PC through USB), controls operation of all modules, reads and processes measurement...
  • Page 16 signals, and outputs measurement results. Cable 821023 J211 J200 Auuto sample holder Reference Signal Board Cable 821022 J208 USB interface board Cable 821021 J202 Transit board Cable 821024 J212 Touch screen Mainboard Filter wheel motor Cable Cable 821020 821025 Filter Wheel J201 J220 Main Signal board...

  • Page 17: Main Board

    5.3.1 Main Board J203 J210 J206 J216 J219 J220 J218 J202 J200 J201 J215 J212 J211 J208 J214 Figure 5-4 Main board Number Description Pin definition J200，J201 Signal board 1, 2 GND, digital ground interface Integrator charging switch...
  • Page 18 Integrator reset 5 – 7，14 Integrator charging capacitance selection ADC chip select, active low ADC clock ADC data 15，16 +15V, simulate part power+ 17，18 SGND, simulate part earthing 19，20 -15V, simulate part power- J202 Touch screen interface RXD，serial port reception (TTL) TXD，serial port sending（TTL）...
  • Page 19 11，12 PC, stepper motor phase C 13，14 PD, stepper motor phase D Auto sample holder detection signal, active low Unused J212 Filter wheel motor +12V interface PA, stepper motor phase A PB, stepper motor phase B PC, stepper motor phase C PD, stepper motor phase D J213 Light switch mirror...

  • Page 20: Usb Interposer

    interface Table 5-3 Main board description 5.3.2 USB Interposer J401 J400 Figure 5-5 USB Interposer Number Description Pin definition J400 interposer 1，2 interface USB D- USB D+ 5，6 J401 USB-A VBUS USB D- USB D+ Table 5-4 USB interposer description 5.3.3 Interposer J701 J700...

  • Page 21: Touch Screen

    interface RXD, serial port reception (TTL) TXD, serial port sending (TTL) J701 Touch screen 1 - 3 interface Unused RXD, serial port reception（TTL） TXD，serial port sending (TTL) Unused 8 - 10 Table 5-5 Interposer description 5.3.4 Touch Screen J217 Figure 5-7 Touch screen Number Description Pin definition...

  • Page 22: Signal Board

    5.3.5 Signal Board J300 Figure 5-8 Signal board Number Description Pin definition J300 Signal board 1，2 GND， digital ground interface Integrator charging switch Integrator reset 5 – 7，14 Integrator charging capacitance selection ADC chip select, active low ADC clock ADC data 15，16 +15V, simulate part power+ 17，18...

  • Page 23: Replace Fuse

    6.1 Replace Fuse Warning: The access voltage of the power socket will cause harm to human bodies. Be sure to turn off the power before replacing the fuse! Prepare a 3×150 slotted screwdriver; Turn off the power switch and unplug the power cord; Turn the screwdriver 90°...

  • Page 24: Troubleshooting

    7 Troubleshooting This section helps maintenance personnel to diagnose instrument failures. Maintenance personnel should pay attention to warnings and safety precautions when dealing with problems. Startup initialization, self-check and maintenance modules are very helpful for diagnosing instrument failures. 7.1 Initialization and warm-up The instrument self-check process is as follows: Light source Not applicable.

  • Page 25: Maintenance Mode

    7.2 Maintenance Mode Maintenance Mode is designed to help maintenance personnel diagnose faults. There are 2 ways to enter Maintenance Mode: 1. Turn on the instrument, when initialization fails, tap on the LCD screen 10 times in succession (Figure 7-1); 2. Main Menu → System →About, tap on the blank area under “Firmware Version”...

  • Page 26: How To Confirm Initialization Failure

    Function Module Item Parameter or description Filter wheel switch Filter wheel 1~8 – 1~8# filter wheel hold position Position From the initial position to the current position, the number of steps the filter wheel switch motor takes The filter wheel motor drives the filter wheel to rotate until the system detects the filter wheel positioning piece, and the initialization is completed system...
  • Page 27 switch motor is faulty. The filter wheel motor stops after one revolution, but the filter wheel positioning piece does not stop in the slot of the filter wheel photoelectric switch, indicating that the filter wheel photoelectric switch is faulty. Fault confirmation of sample holder initialization failure during start-up self- check Open the sample room and check whether there is any obstacle on the path of the automatic sample cell holder;...

  • Page 28: Common Faults And Solutions

    Open the sample chamber and check whether there is anything blocking the light path; Enter Maintenance Mode, Press of “Wavelength”, enter “500” to go to 500nm, press of “Energy/Gain”, set Gain to 1, observe the energy value. If it ＜ 2000, the tungsten lamp is running out of energy;...
  • Page 29 connected or damaged LCD module damaged Replace the LCD module The display screen is on after start- Main board start mode has been Press the start mode switch in up, but stay in Logo page switched the small hole next to the USB interface on the back of the instrument with a thimble to switch the mode back...
  • Page 30 and signal board J301 Replace the Cable Replace the signal board Signal board power fault Improve connection between main power supply and main board J218 Replace the Cable Replace the main power supply Wavelength calibration failed during Obstacle or sample in the light path Remove obstacle self-check...
  • Page 31 Cuvette contaminated Clean or replace the cuvette Sample concentration too high Dilute the sample Volatile sample Close the cuvette lid before testing Deuterium lamp out of energy Replace the deuterium lamp Measurement unstable in VIS region Cuvette contaminated Clean or replace the cuvette Sample concentration too high Dilute the sample Volatile sample...
  • Page 32 USB interposer fault Improve connection between USB interposer J208 and main board Replace the Cable Replace interposer Serial printer error Printer power off Turn on the printer power Printer RS-232 cable not connected Improve connection properly with instrument Replace RS-232 cable Printer out of paper Load thermal paper Printer fault...

  • Page 33: Disassembly And Replacement Of Parts

    Replace interposer UI update through SD card failed SD card format not supported Format the SD card to FAT32 SD card capacity or speed not Use a low speed SD card less supported than 8G ， and slower than Class 4 LCD module damage Replace the LCD module Table 7-2 Common fault and solution...
  • Page 34 Figure 8-1 Shell screws Turn the instrument back, pull out the rod, pinch the middle part of the rod and turn counterclockwise, and unscrew the rod; Figure 8-2 Rod With both hands, slowly lift the shell to separate it from the bottom plate and turn it to the right to be vertical.

  • Page 35: Remove Bottom Plate

    Figure 8-3 LCD module adapter 8.2 Remove bottom plate Turn off the instrument and unplug the power cord； Lay a soft cloth or sponge on the desktop and turn the instrument upside down; Use a PH1×150 screwdriver to unscrew the 9 screws as shown below to remove the bottom plate.

  • Page 36: Remove Monochromator Cover

    Insert your fingers into the position shown below. When you touch the buckle of the LCD module, press the buckle firmly until it is separated from the cover and lift it slightly; Figure 8-6 Unbuckle Remove the flat cable from the LCD module. Figure 8-7 Remove LCD cable 8.4 Remove monochromator cover Turn off the instrument and unplug the power cord;...

  • Page 37: Replace 1# Reflector Mirror

    Figure 8-8 Monochromator screws 8.5 Replace 1# Reflector Mirror Turn off the instrument and unplug the power cord; Remove the lamp room cover; Mark the position of the mirror holder on the bottom plate with a marker pen as shown below; Figure 8-9 Mark position Use a PH1×150 screwdriver to unscrew the 2 screws as shown below, remove the original reflector mirror, install the new reflector mirror according to the mark,...

  • Page 38: Replace 2# Reflector Mirror

    Figure 8-10 Mirror holder screws Turn on the instrument, wait for the instrument to start warm-up, adjust the reflector mirror, adjust the light spot to the center of the entrance slit as indicated by the arrow below. Rotate the mirror holder to adjust the horizontal position of the light spot, move the mirror holder forward and backward to adjust the spot size (focal length), and then tighten the 2 screws on both sides to fix the mirror holder;...
  • Page 39 Figure 8-12 Mark position Use a PH1×150 screwdriver to unscrew the 2 screws as shown below, remove the original reflector mirror, install the new reflector mirror according to the mark, and tighten the screws (but do not tighten too much, so you can move or turn the mirror);...

  • Page 40: Replace 3# Reflector Mirror

    Figure 8-14 Adjust mirror holder After replacement, restore the monochromator cover and the shell, and restart the instrument. 8.7 Replace 3# Reflector Mirror Turn on the instrument, enter Maintenance Mode, set the wavelength to 0nm, and switch the filter wheel to Empty (7#); Remove the shell and the monochromator cover;...
  • Page 41 and tighten the screws (but do not tighten too much, so you can move or turn the mirror); Figure 8-16 Mirror holder screw Fine-tune the mirror and adjust the light spot to the center of the exit slit as indicated by the arrow below. Rotate the mirror holder to adjust the horizontal position of the light spot, move the mirror holder forward and backward to adjust the spot size (focal length), and then tighten the 2 screws on both sides to fix the mirror holder;...

  • Page 42: Replace Grating

    8.8 Replace Grating Turn off the instrument and unplug the power cord; Remove the shell and the monchromator cover; Use a PH1×150 screwdriver to unscrew the 3 screws that secure the grating assembly as shown below, and remove the grating assembly upward; Figure 8-18 Grating screws Take out the new grating, wind the spring coil around the shaft 14 times and install it on the bottom plate, fix it at the position shown below with screws (but...

  • Page 43: Replace Filter Wheel

    8.9 Replace Filter Wheel Turn off the instrument, remove the shell and the monochromator cover; Rotate the filter wheel to the position where the screw is up; Figure 8-20 Filter wheel screw Use a PH1×150 screwdriver to unscrew the screw of the filter wheel as shown below, and push the fan-shaped tooth to the side of the wavelength photoelectric switch, remove the original filter wheel, and install a new filter wheel as shown below.

  • Page 44: Replace Beam Splitter

    10mm Figure 8-21 Filter wheel fixing After replacement, restore the monochromator cover and the shell. 8.10 Replace Beam splitter Turn off the instrument, remove the shell; Remove the reference amplifier shield and the signal board to expose the beam splitter; Figure 8-22 Beam Splitter...

  • Page 45: Replace Signal Board Block

    Use a PH1×150 screwdriver to unscrew the 2 screws to remove the beam splitter, install a new one and fix it; Figure 8-23 Lens screws Restore the reference amplifier shield and the signal board; After replacement, restore the shell and the bottom plate, and restart the instrument.

  • Page 46: Replace Grating Motor

    8.12 Replace Grating Motor Turn off the instrument, remove the shell, the monochromator cover and the bottom plate; On the bottom of the instrument, disconnect J214 connector on the main board; Use a PH1×150 screwdriver to unscrew the 4 screws that secure the grating motor, and take out the grating motor;；...

  • Page 47: Replace Filter Wheel Motor

    8.13 Replace Filter Wheel Motor Turn off the instrument, remove the shell, the monochromator shell and the bottom plate; On the bottom, disconnect J212 connector on the main board; Turn the filter wheel to the position where the screw is up as shown below, use a PH1×150 screwdriver to unscrew the screw of the filter wheel as shown below, and push the fan-shaped tooth to the side of the wavelength photoelectric switch to remove the filter wheel;...
  • Page 48 below, remove the original filter motor, install a new on and fix it; Figure 8-29 Filter wheel motor screw Put on the rubber sleeve, and insert the rubber ring into the light inlet of the sample room, then screw on the screws of the sample room, and install the signal board and the shield;...

  • Page 49: Spare Part List

    10mm Figure 8-31 Filter fixing On the bottom, disconnect J212 connector on the main board; 10. After replacement, restore the monochromator cover, the shell and the bottom plate, and restart the instrument. 9 Spare Part List This section lists the replaceable parts of the instrument. Number Name Description...
  • Page 50 820402 Battery CR2032, 3V 820501 Grating Motor With mounting plate, with gear, step angle 0.9°, 12V 820503 Filter Wheel Motor 24BYJ48-02W-176(12V 200Ω) 820601 Fuse RF1-20, 3.15A/250V 820701 Fuse Holder With Cable, R3-11 5*20 250V/125 Opening 12.5mm 820801 Limit Switch With Cable 821001 Power Cord Chinese Standard, 2.0m/0.75/black...
  • Page 51 850101 Display Component 5 inch, with touch 860101 Main Board 860216 Signal Board 860301 Photoelectric Switch Filter wheel, cut-off 860302 Photoelectric Switch Wavelength, cut-off 860401 USB Interposer Front 860501 Interposer Between main board and screen cable Table 9-1 part lists...

Table of Contents