Sisco GD500 Handheld Multi Gas Detector User Manual

: June 13, 2024
: Sisco

Table of Contents

Sisco GD500 Handheld Multi Gas Detector
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Sisco GD500 Handheld Multi Gas Detector

Thanks for purchasing our product. Please read the user manual carefully before using

Keys Operation

Sisco-GD500-Handheld-Multi-Gas-Detector-fig-6

(Note : The long press function only works in detection remember to click the “ON/OFF” button to confirm and save the settings) interface. When you change e or reset any data, please

Power On
Press the “ON/OFF” for three seconds, the detector will be turned on. The screen displays the following interface successively: Brand and Logo, main parameter interface, and initialing countdown. The countdown would be 30-60 seconds, which is to make sure that the sensors are fully activated. After 30 seconds, the device enters normal detection mode.

Zero Calibration

Zero calibration must be done in clean air. Zero calibration is needed when there is zero shift.
Put the detector in clean air for 3-5 minutes, under the detection mode, and press the “UP” and “DOWN” buttons at the same time for three seconds, the data of all channels will reset to zero automatically.

Note: Zero calibration of oxygen detector, nitrogen detector, and carbon dioxide detector (target gases are components of the air), the data will default to 20.9% VOL (02), 79.1%VOL (N2), and 400pm (CO2). Do not do the zero calibration in not clean air or when there is no zero shift.

Process of Over-range incorrect operation
Users should avoid using gases that exceed the measure range to impact the sensor, because it will affect the lifespan and sensitivity of the sensor, even, “poison” the sensor. If there is any over-range incorrect operation that makes the detector display a concentration at a large reading, the remedy is to take the device out of the environment immediately put it in clean air for over half an hour, and then observe the reading, if it keeps going down, then wait until the reading back to zero before powering it off, and do the zero point calibration next time before using it. If the reading is maintained at full scale, the user should send the device back to the manufacturer or agent for repair or replacement of the sensor.

Alarm light
Silicon rubber case
LCD
USB charging port
UP
DOWN
ON/OFF
Sensor air chamber

Note: If the detector is used for the gas cylinder detection, considering the high pressure in the cylinder, please use a pressure regulator, and keep it as the below data:

Flow rate: 800mL~1L/minute
Pressure: 0.1MPa or 1Bar
Working temperature: -20~50 degrees C
Working humidity: 0-95%RH, no condensing

Please put the detector in clean air for about 5 minutes and wait for the data to fall to normal before turning it off after measurement.

Operation Interface
When the detector is turned on completely, the device will enter the detecting mode. The detected gases will be shown on the screen (for example O2, CO, H2S, EX). Time and battery power will be showed at the top right. If measured 4 gases, the time and battery power information can be checked by short pressing the ON/OFF button.

Alarm Status

When the detected gas concentration is higher than the low alarm value, the low alarm is auto-on, the relative gas value will be highlighted, and the alarm sound will be on, blue light will be flickered.
When the detected gas concentration is higher than the high alarm value, the high alarm is auto-on, the relative gas value will be highlighted, the alarm sound will be on, red light will be flickered.
When there is a low alarm and a high alarm at the same time, both relative gas values will be highlighted, and the high alarm will take priority.

Low Battery Alarm
When the battery is low, there will be a sound, light low battery alarm. There will be sound and light every 5 seconds to remind the user to charge the device in time. When the battery is used up, the device will be turned off automatically.

Alarm Setting
In the detection model, press the “UP” button to enter the menu, choose the “Alarm point”, and start to set the alarm value.
There are four options under the alarm setting mode. The first option is the “channel”, there will be 4 channels for 4 in 1 multi gas detector.

Channel choose: press the “ON/OFF” button, and the cursor will be at the channel number, then press the “UP” and “DOWN” buttons to choose the channel, and press the “ON/OFF” button to confirm.
Alarm setting: The second option is the low alarm value, and the third option is the high alarm value. Choose the option that you want to change, then press “ON/OFF” to confirm, then press the “UP” and “DWON” to increase or decrease the value, and press the “ON/OFF” to move the cursor. After the setting is done, press the “ON/OFF” button to save the settings.

Settings
In the detection model, long press the “UP” button to enter the menu, choose the “INST Setup”, and start to set the detector.
There are three options: Language, gray level, and LCD backlight.
Language: Chinese and English are available.

Calibration
Note: Calibration needs to be done by professionals and with necessary accessories and standard gas. A password is needed. (If you need a password, please contact the manufacturer to get it)
In detection mode, long press the “UP” button, and choose the CALIBRATION. There are five options in the calibration interface:

Channel option: you need to choose the right channel/gas type before calibration, there will be 4 channels for the 4 gases multi-gas detector.
Zero calibration option: put the detector in clean air for 3-5 min, then press the” ON/OFF” button, wait for the value to become stable, and press ”ON/OFF” again, until the zero calibration is finished. You can also do the zero calibration in the detection mode, press the “UP” and “DOWN” buttons for three seconds, and the data of all channels will reset to zero automatically.
Target point calibration:
Prepare the standard gas before starting the target point calibration. Choose standard gas, and press the ON/OFF button to enter.
There will show “please input standard gas” at the top of the LCD, and at the bottom, there is “gas type”, calibrate value, “VA” (current concentration), “AD”, and “ESC or SET”. Change the target concentration to the standard gas concentration by pressing “UP” and “DOWN”, after the value is stable, press the “ON/OFF”, to finish the calibration.

The detailed process is as below:

Connect the detector with a standard gas cylinder by tube.
Enter the standard gas calibration interface.
Change the target point value to the standard gas value.
Release the standard gas to the detector in a flow rate of 400mL/min. The value of “current concentration” will become larger gradually, and become stable after about 30 seconds.
When the value of VA and AD is stable, the value of “current concentration” will be the same with or almost the same as the “target point value”. Press the “UP/DOWN” button to change the “SET” to
“CONFIRM”, and press the “ON/OFF” button, the calibration is finished.
Cut off the standard gas supply.