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Industrial gas alarm-ZX212

Author: source: Release date: 2016-12-05

Industrial gas alarm-ZX212

Product parameters

ZX-212 flammable gas detection alarm controller is an intelligent alarm controller (hereinafter referred to as the controller), which is used in conjunction with SC910N flammable gas detector (hereinafter referred to as the detector) with explosion-proof performance. The controller is in a safe place convenient for observation and maintenance. The detector signal is transmitted to the controller through the 485 bus. The controller can display the current channel number, channel concentration, and alarm or failure status. When the concentration value exceeds the alarm preset value, the controller can issue an audible and visual alarm, and send out a control signal to remind the operator to avoid various safety accidents.
ZX-212 type flammable gas alarm controller is widely used in chemical, petroleum, metallurgy, oil depots, liquefied gas stations, painting operations, gas distribution and other flammable gas production, storage, use and other indoor and outdoor easy to leak dangerous places. The design and manufacture of ZX-212 flammable gas alarm controller conforms to the national standards and corresponding regulations of GB16808-2008 "Technical Requirements and Test Methods for Flammable Gas Alarm Controller" of the People's Republic of China.

zx212 gas alarm wiring diagram

model ZX-212
voltage AC220V ± 20%
Channel capacity No. 32
Control bus RS-485 bus system
Sound pressure range > 75dB / m
Alarm concentration Alarm default value 25% LEL (adjustable)
Maximum working current 1.5A (with full 16 detectors)
System power consumption 20W (with full 16 detectors)
Backup capacity 24VDC / 7AH,> 2 hours
stability Long-term working alarm concentration error is not greater than ± 2.5% LEL
Concentration deviation Not more than ± 2.5% LEL
Alarm method Sound and light alarm, LCD display LEL concentration
Backup battery specifications 100 * 88 * 70MMX2
Backup battery parameters 12V5AH
structure size 350mmX280mmX93mm
weight 5.6kg
Implementation standards GB16808-2008
Installation Notes
The controller is a non-explosion-proof structure. It should be fixedly installed in a safe place. The installation position should be selected for easy observation and maintenance.
Function Description
ZX-212 controller is easy to operate. It only has 5 operation buttons, 7 indicators and an LCD display, which is convenient for users to operate.
zx212气体报警器显示屏 button
  • " Set " key: Set various parameters, move the cursor to the right
  • "Function ( )" key: move the cursor to the left or increase the set value
  • " Mute (∨) " key: move the cursor to the right or decrease the set value; it can be used to eliminate the alarm sound when an alarm occurs
  • " OK " key: Confirm an operation, and keep setting and exit.
  • " Reset " key: Restart the system.
  • " Linkage " key: temporarily unused.

Indicator light

  • Main power indicator (green): shows that the mains power of this machine is normal.
  • Main power failure light (yellow): Shows that the mains power of this unit is too low or not connected.
  • Power backup indicator (green): Shows that the power supply of the machine is normal.
  • Standby power failure light (yellow): Shows that the standby power of this machine is too low or not connected.
  • Muted indicator (yellow): indicates that the probe is not connected to 16 full.
  • Alarm indicator (red): indicates that the gas concentration exceeds the standard.
  • Various fault indicators (yellow): display fault information, including: whether the sensor is faulty, whether the connection between the detector and the controller is faulty, whether the main and backup power connections and the charging line are faulty.

screen

During normal operation, the normal display is shown in Figure 2. The first line shows the date and time, and the second line shows the channel number of the detector, the gas concentration value of the current channel, and the detector status from left to right. If there is no alarm in the line, the shielded detector is displayed, that is, the unused channel number, for example:
zx212 industrial gas alarm display
The ZX-212 controller must be entered with a password to operate. Press the " Set " key for 2 to 3 seconds. The password interface appears. Press and hold the Set key to move the cursor cyclically. Press the up and down keys ((, ) to set "0 to 9". ", Press the" OK "key, the password is entered correctly, and enter the corresponding level of function operation. If the password is incorrect, it prompts "Password error" (see Figure 4), and can be re-entered. If it is wrong for three consecutive times, it will exit to polling state. Please note that you must silence the alarm first, otherwise you cannot enter the menu.
Enter "1000", "2000", and "3000" to enter the first, second, and third level operations respectively (see Figure 5). The third level is higher than the second level, the second level is higher than the first level, and the higher level can perform this level and Low-level operations, and vice versa.

Channel mask   ——Three-level operation, the password is correct, press the “ OK ” key to display (see Figure 5):

Press the up and down keys ( , ) to move the cursor to “ Channel ” and press the “ OK ” key to display (see Figure 6): Press the “ Set ” key to move the cursor cyclically on channels 1 to 16 and move the cursor to the corresponding channel Below, press the up and down keys ( , ) to set or block (√, ×) the channel respectively, and move the cursor forward. If masked, the channel is not polled and displayed on the masked line. The " Set " key does not save and exit. Press the " OK " key to save and exit.
alt =

Self-test (acoustic-optical system detection) ——Second-level operation, the password is correct, press " OK " key, it will display (see Figure 5):

Press the "up and down keys ( , )" to move the cursor to " self-test ", press the " OK " key to turn on the device (display ¤), and press the " OK " key again to close (display ×). Press the Set key to exit. However, during the screen self-test, you need to press and hold the "OK" key to check the bright points, and release to check the dark points. Then press the "up and down keys ( , )" to exit the screen detection.

It must be noted that the second peripheral is a relay contact specially designed for the pulse valve. It must not be left open for a long time, otherwise the solenoid valve will be burned! !! !! !! !! !!

alt = Maintenance guide
  • 1. Do not spray insecticide, qualitative hair spray, paint adhesive, thinner alcohol and other flammable and explosive substances on the sensor head.
  • 2. Do not apply paint or other substances to the surface of the explosion-proof net of the sensor module, so as to avoid volatile substances affecting the life of the detector and hindering the diffusion of gas.
  • 3. Do not place in or near the exhaust pipe or chimney.
  • 4. Do not place in places with high temperature and machine overtime.
  • 5. If a failure occurs, do not disassemble and repair it by yourself, you can notify the supplier or agent to deal with it.
zx212 gas alarm system diagram Big picture
  • 1. Detectors stored in a temperature below 0 ° C should be placed in a room temperature environment for more than 2 hours before being powered on.
  • 2. Detectors that have not been used for a long time should be used normally after being warmed up for 2 hours.
  • 3. Pay attention to rain, moisture and strong vibration and impact during transportation.
  • 4. The installation of the detector must be performed by professionals: the detector should not be installed close to the wall, and sufficient space should be left around for routine maintenance and troubleshooting. When monitoring flammable gas whose specific gravity is less than air, the detector should be installed 0.3m away from the ceiling, and when monitoring flammable gas whose specific gravity is greater than air, the detector should be installed 0.3m away from the ground.
  • 5. The detection range of the detector in the specific environment is related to many factors, such as the type of gas being detected, the wind direction and wind speed in the detection environment. The recommended detection range is 6 × 6 square meters in space and 6 meters in length.
  • 6. In new buildings, the detector should be installed after painting and welding work is completed.
  • 7. Do not install the detector near steam or oil.
  • 8. Do not immerse the detector in water or other liquids.
  • 9. Do not use irritating substances such as pesticides, paints, and large amounts of alcohol near the detector to avoid false alarms.
  • 10. Avoid frequent high concentration flammable gas shock sensors during use.
  • 11. The service life of the sensor is 5 years under normal conditions. Improper installation, use or the influence of bad environment will reduce the sensitivity of the sensor and shorten its service life.
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