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GRAPHTEC GL240 Q&A
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GRAPHTEC GL240 Q&A

Midi logger
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Q & A - QUESTION - midi LOGGER GL240
Frequently asked questions
1.
Is it possible to measure the current (4-20mA)?
2.
What is the resolution of each range when measuring voltage?
3.
What is the measurement input impedance in ohms?
4.
Is it possible to input negative voltage into the analog input voltage?
5.
What is the resolution of the temperature?
6.
How to send email using Gmail?
Main Functions 1
1.
What is the sampling rate when connected to GL100-WL?
2.
Is analog voltage input is available for differential input?
3.
What kind of measurement is the logic input used for?
4.
Is it possible to measure current (4-20mA)?
5.
Is it possible to measure the flow rate by pulse input?
6.
What is the resolution of each range when measuring voltage?
7.
What is the measurement input impedance in ohms?
8.
Which SD memory card and what capacity is available?
9.
"When operating the device with an external battery using a DC drive cable,
How many V can be input?"
10.
What is the maximum voltage that can be applied to the logic/pulse input section?
11.
What are the specifications of the alarm terminals?
12.
Is it possible to use Y terminal?
13.
Is a USB cable included?
14.
Is there any possibility that the data to be tampered with?
15.
Is it possible to use multiple humidity sensors?
16.
What is the temperature that can be measured with K-type thermocouples?
17.
What is the standard and transmission distance of the wireless LAN option (B-568)?
18.
Is it possible to expand to more than 10 channels?
19.
What is the fastest sampling interval?
20.
What type of filter is used in GL240?
21.
How long is the data that can be recorded on the SD memory card (2GB)?
22.
What is the maximum input voltage?
23.
Are there any requirements for the measurement accuracy of each range?
24.
What is the resolution of the temperature?
1
DATE︓2021/12/15
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Summary of Contents for GRAPHTEC GL240

  • Page 1 Q & A - QUESTION - midi LOGGER GL240 DATE︓2021/12/15 Frequently asked questions Is it possible to measure the current (4-20mA)? What is the resolution of each range when measuring voltage? What is the measurement input impedance in ohms? Is it possible to input negative voltage into the analog input voltage?
  • Page 2 What are the wireless LAN mode and security settings which is avaurable with the wireless LAN option (B-568)? Can I connect to GL100-WL when GL240 operates as an access point (master unit) in wireless LAN mode? Can I connect to GL100-WL when GL240 operates as a station (child unit) in wireless LAN mode?
  • Page 3 The main unit shows recording in progress, but no data has been recorded. What is the "ZONE" under the MONITOR on the discplay? Is there any solution for noise from GL240 sampling on the analog recorder side during measurement with GL240 and analog recorder (pen recorder, etc.) connected in parallel at the same measurement point? The instantaneous values are not transferred when I have set up direct EXCEL function.
  • Page 4 What happens if the cable is disconnected during recording? How to fix the problem when the wireless LAN unit option (B-568) is installed and GL240 is set as the access point (master unit), but GL240 is not searched from the "Wireless network connection" item on...

  • Page 5: Frequently Asked Questions

    Q & A - QUESTION - midi LOGGER GL240 Frequently asked questions 1. Is it possible to measure the current (4-20mA) ? It can be measured by converting the voltage using a shunt resistor.4-20m convert to 1-5V by using a 250Ω shunt resistor.
  • Page 6 Frequently asked questions 6．How to send email using Gmail? 1. Sending settings for G-mail To send e-mails via Gmail sending server with the e-mail sending function of the target model, please make the following settings and confirmations. ※ Gmail account is required. ※...

  • Page 7: Main Functions

    Main Functions 1 1. What is the sampling rate when connected to GL100-WL? Even if the optional wireless LAN unit is installed and connected to the GL100-WL, the sampling interval limitation will not change. However, the maximum sampling interval of the GL100-WL is 500ms, so if the sampling interval is faster than 500ms, the data will be updated every 500ms and the same data will be lined up until it is updated.
  • Page 8 Main Functions 1 6. What is the resolution of each range when measuring voltage? The resolution for each range is shown below. 7. What is the measurement input impedance in ohms? The input impedance is 1MΩ. The allowable signal source resistance is less than 300Ω. 8..
  • Page 9 Main Functions 1 Frequently Asked Questions 11. What are the specifications of the alarm terminals? It is Open collector output. The maximum specification of the transistor used as output ・ Voltage between collector and GND: 30V ・ Collector current: 0.5A ・...
  • Page 10 No. The maximum number of channels in the main unit is 10. If you wish to have more channels, please consider a higher model such as GL840. The application software for PC (GL100_240_840-APS) enables measurement of up to 10 units (in the case of GL240 only) by using a PC and a USB hub.
  • Page 11 Frequently Asked Questions 19. What is the fastest sampling interval? GL240 uses photomos relay scanning system, so the sampling cycle becomes slower as the number of channels used increases. The following table shows the number of channels, sampling interval, and sampling interval at which the digital filter is enabled.
  • Page 12 Main Functions 1 Frequently Asked Questions 21. How long is the data that can be recorded on the SD memory card (2GB)? Measurement conditions ※ There is a limit to the number of channels that can be set. 10ms: 1ch, 50ms: 5ch, others: 10ch (analog input only) One file can be up to 2GB, but there is a function to switch and record a file every 2GB.
  • Page 13 Main Functions 1 Frequently Asked Questions 22. What is the maximum input voltage? Please refer the following for maximum input voltage. The semiconductor relay at the input section will break down if it exceeds the specifications, so do not input a voltage that exceeds the specifications even for a moment.
  • Page 14 Main Functions 1 Frequently Asked Questions 23. Are there any requirements for the measurement accuracy of each range? The measurement accuracy of this instrument is based on the following conditions. 1.Operating environment: 23°C±5°C 2.Aging time of main unit: 30 minutes or more after power-on Filter setting: On (10) 4.Sampling interval: 1s/10ch 5.Others ：...
  • Page 15 The battery life is about 7 hours in screen-saver mode and about 6 hours in LCD mode. ※ The only battery that can be used with the GL240 is the B-569. Both times are based on using a new battery pack, recording to an SD memory card at 1-second sampling intervals, and an environment of +25°C.
  • Page 16 5. What are the wireless LAN mode and security settings which is available with the wireless LAN option (B-568)? The wireless LAN modes that can be set with the wireless LAN option (B-568) are "Off", "Access Point" (GL240 will be set as the parent unit), and "Station" (GL240 will be set as the child unit).
  • Page 17 Main Functions 2 9. How to display the data in X-Y format? It is possible to display X-Y between cursors on the playback screen of recorded data by using the standard application software (GL100_240_840-APS). 10. How to adjust the brightness of the screen? The [LCD Brightness] setting is in the [OTHER].
  • Page 18 15. What is the reason why it is not triggered even if input signal is settled input setting value? The combination of the trigger setting of GL240 has level and edge. If the setting is edge, the condition will not be met once, and if the condition is met after that, it will be considered as satisfied.
  • Page 19 Main Functions 2 19. What does the display show when the SD memory card is full? When there is no more memory left, the message "The disk is full" and "Data recorded" will be displayed in the upper left corner of the LCD. Press the [START/STOP] key to display the "Stop recording?" message, then press the [ENTER] key to finish recording.
  • Page 20 This function displays the status of the input signal without recording. 26. What is GBD file? It is an extension of "Graphtec Binary Data", which is a binary data format for our instruments. It can be played by our compatible devices and software.
  • Page 21 Main Functions 2 29. When measuring rotation speed with pulse input, why does it increase in 60times when the sampling interval is 1 second? The number of rotations is converted from the number of pulses measured at the sampling interval to the number of rotations per minute.
  • Page 22 Main Functions 3 1. How to check the past data during long recordings? Press the [REVIEW] button during recording to display the past data. By pressing the [DISPLAY] key, you can switch between one screen and two screens. In the two-screen setting, the past data is displayed on the left side and the current data is on the right side.
  • Page 23 "USB drive mode" allows you to connect the GL240 to your PC with a USB cable and The GL240 can be operated as a removable disk by connecting the GL240 to a PC with a USB cable and turning on the power while holding down the [START/STOP] key on the unit.
  • Page 24 Main Functions 3 5. Where are the results of statistical operations displayed? The statistical calculation result will be displayed on the digital + statistical calculation screen. Press the [DISPLAY] key to display the digital screen, and use the [ ▶▶ ] key to switch the display to the "digital + statistical calculation screen".
  • Page 25 8. On the startup screen after turning on the power, the screen display stops when "AMP Initialize ... OK" is displayed after GRAPHTEC, Version, and Revision. The main control board is waiting for a response from the amplifier board. It seems the amplifier board is not working.
  • Page 26 Main Functions 3 9. Why are the measured voltage and temperature fluctuations not stable? If the AC line frequency is set incorrectly, the digital filter will not work effectively. Check the AC line frequency setting and match it to the power supply frequency in your area. The setting can be made by pressing the [MENU] key and selecting "AC line frequency"...
  • Page 27 When the battery voltage is low, the GL240 will automatically turn off by closing the recording file. When the power is restored, the GL240 will turn on and recording will start automatically (in case "Power On Start" is set to "Enable" in the menu.) 13.
  • Page 28 Main Functions 3 14. What is the update timing of the waveform display on the main unit? The display timing of the main unit is displayed at the sampling speed if the sampling interval is faster than 5 seconds. If it exceeds 5 seconds, it will be updated and displayed at 5-second intervals. 15.
  • Page 29 Also, "5zone" and "10zone" divide the waveform into 5 and 10 zones, and display the waveform in order from the first channel. 17. Is there any solution for noise from GL240 sampling on the analog recorder side during measurement with GL240 and analog recorder (pen recorder, etc.) connected in parallel at the same measurement point? The GL240 measures multiple channels by sequentially switching the input channels.
  • Page 30 MainfFunctions 3 18. The instantaneous values are not transferred when I have set up direct EXCEL function. The output data of direct EXCEL transfer includes statistical values and instantaneous values. To transfer an instantaneous value, set the output data to "Instantaneous Value". For details, please refer to "7-12-4.
  • Page 31 Main Functions 3 19. Can't send email by Gmail. 1.Setting up Gmail sending If you want to send e-mails through the Gmail sending server using the e-mail sending function of the target model, please make the following settings and checks. *It requires a Gmail email account.
  • Page 32 <How to check> If the USB driver is installed correctly, the software and the main unit are connected and the power is turned on, Graphtec GL/MT/DM/WR Series" will be displayed in PC Controller→Device Manager→USB controller items. If the USB driver is not installed correctly, please refer to the "USB Driver Installation Manual" and install it.
  • Page 33 Functions of Software 1 5. When opening the playback data, the small image of the waveform is not displayed, but the default icon. Display the recorded data as a small waveform image, the thumbnail waveform display function is only applied to files recorded with the software, so thumbnails will not be displayed for data recorded on the main unit or data copied from the main unit.
  • Page 34 "On", the data is still recorded on the main unit. 5. How to fix the problem when the wireless LAN unit option (B-568) is installed and GL240 is set as the access point (master unit), but GL240 is not searched from the "Wireless network connection"...
  • Page 35 "Use" on GL240, is the IP address being acquired correctly? ・ When using a static IP, is the upper segment of the PC side and the GL240 side the same? ・ When using a fixed IP, is the IP address set in the GL240 duplicated in other devices? ・...
  • Page 36 10. How to store the settings of GL100_GL240_GL840-APS in the main unit. Display "Connection" from [Connect with main unit], and when you cancel [Connect] of the connected GL240, [Memory of setting conditions] is displayed. Select [Yes] to store the setting conditions in the main unit. (Some setting conditions are not stored.) 11.
  • Page 37 Functions of Software 2 14. When recording with the GL100_GL240_GL840-APS, is it possible to simultaneously record to the SD memory card installed in the main unit? Simultaneous recording to the PC and SD memory card installed in the main unit is possible. Please turn on to "Main unit side recording destination setting"...
  • Page 38 Functions of Software 2 19. Is there a limit to the display size to use the standard PC application software on a large monitor? There is no limit to the display size as long as the display resolution is 1024 x 768 or higher. 20.