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Product details
Low speed multi-channel products with diversified scalability
MIDI LOGGER GL820 is a pattern product that values scalability. The maximum number of channels can be expanded from the standard 20ch to 200ch. In addition to using a reliable full channel insulation input method, it can also achieve diversified inputs such as voltage/temperature/humidity/pulse/logic. To enhance noise resistance, the product is equipped with a Δ ∑ type A/D frequency converter to improve the efficiency of eliminating high-frequency noise. In addition, the product is equipped with Ethernet suitable for multi-channel data monitoring, which can be remotely monitored. The storage medium can use USB memory to directly write the measured data for long-term recording. GL820 pursues functionality and operability that can correspond to diverse measurement purposes, providing you with cost-effective products from research and development to production line sites.
Performance Overview
(* 1) GRAPHTEC's unique RoHS corresponding logo. For detailed information, please refer to the "WEEE Directive and RoHS Directive Response System"
GL820 features
Battery driven for 7 hours (optional product), can be used with peace of mind
Assemble the battery for safe measurement
When using an AC adapter for AC drive, the battery pack can automatically switch to battery drive even in the event of an instantaneous power outage, effectively preventing the adverse effects of power outages on important data. If the power supply is no longer restored after a power outage and the battery capacity is completely depleted, the measurement can be automatically stopped before the battery is fully charged, effectively protecting important data. When charging the battery, even if the host power is turned off, only an AC adapter is needed to plug it into the socket for charging.
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Drive mode |
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DC voltage |
battery charging |
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AC drive (using attached AC adapter) ※ 1 |
- |
Can ※ 2 |
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DC drive ※ 3 |
+24V |
Can ※ 2 |
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+12V |
cannot |
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+8.5V |
cannot |
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※ 1 The driver should preferably use an AC adapter. |
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Screen&Operation
Equipped with a large 5.7-inch TFT LCD with vivid waveform display, and a high brightness 5.7-inch TFT color LCD (VGA: 640 × 480) with excellent visibility. With the help of a high-definition display, waveforms and values are easily recognizable, allowing for real-time confirmation of recorded data. In addition, setting changes can be made while viewing the waveform.
Idle function&simple operation buttons for convenient settings
Even if only the power is turned on and no measurement is performed, the input signal can still be displayed as a waveform, which is very convenient to use. It can confirm the current input signal and make various settings while viewing the waveform.
During the measurement, previous data can also be confirmed
During the measurement process, waveforms that have disappeared from the screen can also be displayed. It is very convenient to compare existing waveforms with previous waveforms.
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Using USB storage and built-in flash memory, you can record with confidence
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Supports a sampling speed of up to 10ms
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(※) Meet the measurement accuracy conditions specified in the specifications, which may vary depending on the number of channels used and the sampling speed. Please refer to the measurement accuracy of the specifications for detailed information. (* 3) Humidity is obtained by scaling the voltage from 0-1V, and the sampling speed is the same as the voltage. |
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External sampling function
By using the external sampling function, synchronous data recording can be performed with signals from external machines.
※ The logic alarm cable (B-513) from the selected product needs to be used.
Adopting large capacity
Built in 2GB flash memory and USB storageYou can rest assured that the built-in memory is equipped with 2GB flash memory. Long term data recording can be performed without using external storage media. In addition, after using flash memory, even if the power is cut off, the data will not disappear.
External recording media can be usedUSBstorage
The product supports direct recording to high-capacity and easy-to-use USB storage devices.
The host is equipped with a USB memory, which can directly record data or copy the measurement data from the built-in memory to the USB memory.
Even during the measurement process, the USB memory can be replaced. When replacing the USB memory, about 10 minutes of data can be cached internally in the host.
Data recording time (only when simulating 20cm)
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Record interval（Sampling speed (* 1) |
10ms(*2) |
50ms(*2) |
100ms(*2) |
200ms |
500ms |
1s |
10s |
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2GB built-in flash memory |
On the 29th |
72 days |
On the 89th day |
On the 101st day |
253 days |
506 days |
5068 days |
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512MB USB memory (* 3) |
On the 7th |
On the 18th |
On the 22nd |
On the 25th |
64 days |
On the 129th day |
1294sun |
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(* 1) The above values are estimated data. In addition, the number of ch that can be set is limited by the sampling speed. (* 2) At 10ms: 1ch, at 50ms: 5ch, at 100ms: 10ch (* 3) Please use the optional product B-554 or a standard product without fingerprint authentication for USB storage. |
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Equipped with circular storage function
The built-in memory and USB memory adopt a ring storage function, which only stores the necessary latest data in the memory.
Using USB memory and USB driver mode, simple data transfer can be performed to PC. |
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drive time |
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condition |
drive time |
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LCD usage status (brightness MAX) |
About 5 hours |
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Screen saver status |
About 7 hours |
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20ch terminal, 1-second sampling, host memory recording, use of 2 new battery packs,+25 ℃ environment |
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Drive mode |
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Drive mode |
DC voltage |
battery charging |
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AC drive (using attached AC adapter) ※ 1 |
- |
Can ※ 2 |
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DC drive ※ 3 |
+24V |
Can ※ 2 |
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+12V |
cannot |
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+8.5V |
cannot |
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※ 1 The driver should preferably use an AC adapter. |
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drive time |
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condition |
drive time |
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LCD usage status (brightness MAX) |
About 5 hours |
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Screen saver status |
About 7 hours |
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20ch terminal, 1-second sampling, host memory recording, use of 2 new battery packs,+25 ℃ environment |
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Drive mode |
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Drive mode |
DC voltage |
battery charging |
|
AC drive (using attached AC adapter) ※ 1 |
- |
Can ※ 2 |
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DC drive ※ 3 |
+24V |
Can ※ 2 |
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+12V |
cannot |
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+8.5V |
cannot |
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|
※ 1 The driver should preferably use an AC adapter. |
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condition |
drive time |
|
LCD usage status (brightness MAX) |
About 5 hours |
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Screen saver status |
About 7 hours |
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20ch terminal, 1-second sampling, host memory recording, use of 2 new battery packs,+25 ℃ environment |
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Drive mode |
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Drive mode |
DC voltage |
battery charging |
|
AC drive (using attached AC adapter) ※ 1 |
- |
Can ※ 2 |
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DC drive ※ 3 |
+24V |
Can ※ 2 |
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+12V |
cannot |
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+8.5V |
cannot |
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※ 1 The driver should preferably use an AC adapter. |
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All ch multifunctional&insulated input
Standard 20ch analog input preparation. Simultaneously adopting an insulated input method that does not affect each other between channels.
No need for tedious wiring. It can support temperature/voltage/humidity/pulse/logic input, achieving multifunctional correspondence,
Can be used for various purposes.
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(* 1) The pulse/logic has a term of 4ch. The logic alarm cable (B-513) from the selected product needs to be used. |
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Relative humidity measurement accuracy (5-98%)
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Equipped with ΔΣtypeA/Dfrequency converter
To improve noise resistance, the product is equipped with a Δ ∑ type A/D frequency converter to enhance the efficiency of eliminating high-frequency noise.
Thereby reducing the impact of noise from inverters and other sources.
Maximum 200ch, expandable to 500ch with just a computer connection
Unify the terminal block into 20cm/unit, and the maximum channel expansion of the host can reach 200ch.
At the same time, it can achieve full channel insulation input and multifunctional input.
In addition, when using a PC for measurement, by connecting multiple hosts (up to a maximum of 10), one machine can control up to 500ch, or it can be controlled separately.
Expansion of the host
Channel Expansion List
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| Extension method (e.g. extending to 60ch) |
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| Equipped with various filters Each CH is equipped with a moving average filter and a digital filter (to eliminate AC power noise) to reduce the impact of noise and other factors. Each CH is equipped with a moving average filter: 2,5,10,20,40, Off digital filter (noise cancellation filter for AC power supply) However, the effectiveness of this filter will be limited by the measured ch number and the adjustable sampling interval. |
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The measured ch number refers to the value of ch when the input setting is set to a value other than OFF. |
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