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New Cosmos Electric PS-8 Series Instruction Manual For Operation

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PS-8 Series Gas Detector
for use in semiconductor manufacturing plant
Instruction Manual for Operation
Keep this manual for easy reference.
Read and understand this manual carefully before using this product correctly.
This manual describes the standard model. If your unit has end-user-specific options, this manual will be
superseded by your delivery specifications.
Instruction Manual No.
GAE-179-00
December 2024

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  • Page 1 PS-8 Series Gas Detector for use in semiconductor manufacturing plant Instruction Manual for Operation Keep this manual for easy reference. Read and understand this manual carefully before using this product correctly. This manual describes the standard model. If your unit has end-user-specific options, this manual will be superseded by your delivery specifications.

  • Page 2: Related Manuals

     Unit dimensions and components and precautions for unpacking  Installation precautions PS-8 Series Instruction Manual for Operation (this document), No. GAE-179 This document is intended for your supervisors, operators and service personnel who are concerned with the operation and maintenance of this product. It provides the following information to ensure the safe use of the product: ...

  • Page 3: Introduction

    Introduction Thank you for purchasing the New Cosmos PS-8 series extractive type gas detector (“product” or “unit” hereafter). Prior to use, please read this manual as well as the related manuals and follow the instructions provided for correct use of the product.
  • Page 4 Danger, Warning and Caution, depending on the severity and magnitude of the risks. Carefully read the contents related to the precautions before operation and maintenance work. This manual uses Danger, Warning, Caution and Notice symbols to draw attention to procedures, materials, methods, and processes that require particular attention.

  • Page 5: Model Variations

    Model Variations This product is divided into the following models according to the sensor unit and functions that meet the customer's specifications. Main Unit Collective Power Supply Output Signal Model Contact Output 24 VDC Ethernet Analog Signal (AL1, AL2 and Fault) PS-8M ✔...

  • Page 6: Quick Index

    Quick Index This page lists parts that may be often referenced. Prior to use, please read the precautions in 1 “General Precautions”. Unit Dimensions and Components Operation Pages 7 to 22 Pages 38 to 67 Power On/Off Maintenance Pages 25 to 26 Pages 89 to 99 Normal operation Warm-up...

  • Page 7: Table Of Contents

    Table of Contents Related Manuals ............................i Introduction ............................... ii Notation Rules for Registered Trademarks ..................ii Precautions ............................ii Symbols Used in this Instruction Manual ..................ii Model Variations ..........................iv Quick Index ............................... v General Precautions ......................... 1 1.1 Before Work ..........................
  • Page 8 General Precautions 10.6 Individual CH Information ......................49 10.7 Password Entry ........................56 10.8 Gas Alarm Test ........................57 10.9 Fault Alarm Test ........................58 10.10 Clock and Language ......................60 10.11 Device Information ....................... 61 10.12 Software Version ........................64 10.13 Other Useful Functions (Shortcuts) ..................

  • Page 10: General Precautions

    1 General Precautions General Precautions 1.1 Before Work In order to ensure safe use, please carefully read the precautions in this manual before turning on the product to prevent unexpected accidents. New Cosmos is not liable for any cost incurred or any damage resulting from any usage other than that outlined in this document.

  • Page 11: Labels Affixed To Product

    1 General Precautions • Do not use radio wave-emitting devices (e.g., walkie-talkies, cell phones, wireless devices) in the vicinity of the product. • Do not disassemble, modify, or alter the structure of the product or its electrical circuits. Doing so may compromise product performance. •...
  • Page 12 1 General Precautions Labels for Main Unit and Subunit Item Description Serial number label ① Indicates the serial number of the product. Power rating label ② Indicates the model and the power supply specifications. Environmental label ③ Indicates the applicable certification markings. Pump serial number label ④...

  • Page 13: Disposal

    The service life of this product is 10 years. The unit can operate for up to 10 years with standard installation and operation in accordance with the PS-8 series instruction manuals for installation and operation. When the service life has expired, replacement is essential for continued reliable performance and other purposes.

  • Page 14: System Configuration

    2 System Configuration System Configuration This section explains the PS-8 system configuration. Up to three subunits and up to four expansion units (up to eight modules, two modules per expansion unit) can be connected to a single main unit to form a gas detection system (a maximum of 4 channels or 4 gases).

  • Page 15: Package Contents

    － Flat-bladed screwdriver Use to open/close the terminal block’s slots Instruction Manuals for Installation, Operation, PS-8 series instruction manual set and Communication *Sensor unit is not included and sold separately. It will be separately delivered when ordered. Subunit and Accessories Item Qty.

  • Page 16: Unit Dimensions And Components

    4 Unit Dimensions and Components Unit Dimensions and Components 4.1 Main Unit (M) 4.1.1 Exterior Appearance (Dimension unit : mm) Item Component Description ① Front case A combination of a front case and a front cover is called “front ② Rear case module”.

  • Page 17: Led And Keys

    4 Unit Dimensions and Components 4.1.2 LED and Keys Item Component Description Indicates the operational status of either one of the connected channels. The LED status will take precedence in Blinking rapidly > Blinking > Lit. Power LED Not lit: when the unit is off.

  • Page 18: External Wiring Terminals

    4 Unit Dimensions and Components 4.1.3 External Wiring Terminals Do not touch the jumper pins inside. They are for device setting. Jumper Pin (2 places) Identifier Terminal Description 24 VDC (+) INPUT Power input 24 VDC ( − ) − 24VDC Earth 1st stage gas alarm contact output that is...

  • Page 19: Lcd

    4 Unit Dimensions and Components 4.1.4 There are two types of display formats: single channel display and multiple channel display. You may change the display format as required by following the steps: “Device Information” -> “Home screen adj”. Refer to 10.11 “Device Information” for more information. 【単一Ch.表示】...
  • Page 20 4 Unit Dimensions and Components ➊ Main Status Pane Single Channel Display Item Name/Icon Description Sensor channel Displays the sensor channel number. ① Displays icons indicating sensor status such as gas alarm, fault alarm, maintenance mode. Refer to the Event icon A ②...
  • Page 21 4 Unit Dimensions and Components ② Event Icon A Name Icon Description Warm-up icon Appears during the warm-up cycle. Appears when a device failure occurs. Appears when a communication error occurs between units. Appears when a sensor failure occurs. Fault alarm icon Appears when the flow rate is low.
  • Page 22 4 Unit Dimensions and Components Multiple Channel Display Item Name/Icon Description Sensor channel Displays the sensor channel number. ① Displays icons indicating sensor status such as gas Event icon C alarm, fault alarm, maintenance mode, alarm test, ② etc. Refer to the next page for details. Gas name Displays the gas name.
  • Page 23 4 Unit Dimensions and Components ② Event Icon C Name Icon Description Warm-up icon Appears during the warm-up. Test icon Appears during gas or fault alarm test mode. Appears when in maintenance mode 1. Appears when in maintenance mode 1. Maintenance icon Appears when in maintenance mode 2.
  • Page 24 4 Unit Dimensions and Components ➋ Sensor Channel Status Pane During normal operation, the sensor channel status pane displays all sensor channels connected to this product, except for invalid channels and channels displayed in the main status pane. When an event (e.g., gas alarm, fault alarm) occurs, the relevant sensor channel(s) and event icon(s) are alternately displayed.

  • Page 25: Subunit (S1/S2/S3)

    4 Unit Dimensions and Components 4.2 Subunit (S1/S2/S3) 4.2.1 Exterior Appearance (Dimension unit : mm) Item Component Description ① Front case A combination of a front case and a front cover is called ② Rear case “front module”. ③ Front cover ④...

  • Page 26: Leds

    4 Unit Dimensions and Components 4.2.2 LEDs Item Component Description Indicates the operational status. The LED status will take precedence in Blinking rapidly > Blinking > Lit. Power LED Not lit: when the unit is off. ① (Green) Blinking: when the warm-up is in progress. Blinking rapidly: when the sensor is off.

  • Page 27: Address Switches On Rear Case

    Address Switches on Rear Case Item Component Description Adress switches DIP switches for setting the address of the subunit. ① Refer to 7.3.1 “Subunit Address Setting” in the PS-8 Series Instruction Manual Ref. for Installation for how to set the address.

  • Page 28: Expansion Unit (Eu)

    4 Unit Dimensions and Components 4.3 Expansion Unit (EU) 4.3.1 Exterior Appearance (Dimension unit : mm) Item Component Description Front case ① － Rear case ② － Case fixing latch Secures the rear case to the front case. ③ Case release lever Releases the front case from the rear case.

  • Page 29: External Wiring Terminals

    4 Unit Dimensions and Components 4.3.2 External Wiring Terminals AO Module (Analog Output) (AO1 − AO4) Item Component Description DIP switches for setting Address the address of AO ① switches module *Used when adding an AO module. Terminal Identifier Terminal Name Description Earth Earth...
  • Page 30 4 Unit Dimensions and Components DO Module (Contact Output) (DO1 − DO8) Item Component Description DIP switches for Address setting the address of ① switches DO module *Used when adding a DO module. *Do not touch the jumper pins inside. They are for device setting.
  • Page 31 4 Unit Dimensions and Components AI Module (Analog Input) (AI1 − AI4) Item Component Description DIP switches for setting the Address switch ① address of AI module *Used when adding an AI module. Terminal Identifier Terminal name Description Analog input + (4-20 mA) 1S −...

  • Page 32: External Outputs

    5 External Outputs External Outputs When shipped, the relay contacts (gas and fault alarm contacts) have been set as per the delivery specifications specified at the time of ordering. A. When the relay contacts are set to the “normally de-energized” option The relay contacts are not energized during normal operation, and they are energized when an alarm is activated.
  • Page 33 5 External Outputs Analog Output Allocation (Allocating the AO module’s output or the main unit’s output to the channel) • f an AO module, not the main unit, is allocated to the channel, the analog output from the main unit will be fixed at 0.5 mA. If the analog output allocation target is switched from the main unit to the AO •...

  • Page 34: Power On/Off

    6 Power On/Off Power On/Off 6.1 Power-on and Operation Flow After the installation, turn the product on and check that it starts up normally. Take the following steps to turn on the product. Turn on the product while no gas is present around the gas sampling inlet. •...

  • Page 35: Power-Off

    6 Power On/Off The operation flow after powering-up is shown below. Power On Warm-Up Normal Operation Single Channel Display Multiple Channel Display Operational Status Normal Operation Indication/Output Warm-up with No Alarm (Gas-monitoring Mode) Warm-up Icon Displayed Not displayed Power LED (Green) Blinking Fault LED (Yellow) Not lit (Blinking in the event of a fault alarm)

  • Page 36: Alarm Operation

    7 Alarm Operation Alarm Operation This product performs two kinds of alarm operations, gas alarm and fault alarm operations. 7.1 Gas Alarm Operation If the gas concentration or test value exceeds the gas alarm set value, a gas alarm will be activated. The main unit and subunits perform alarm operation in the following manner.
  • Page 37 7 Alarm Operation Gas Alarm Operation (High-Hight) Single Channel Display If a gas alarm is activated, the corresponding channel’s status will be displayed in the main status pane. Moreover, if a gas alarm is activated on more than one channel, the channel status of the last gas alarm will be displayed for 10 minutes, after which channel auto cycle will resume.
  • Page 38 7 Alarm Operation Warm-up Normal Operation Indication/Output 1st Stage 2nd Stage Gas Alarm Gas Alarm Gas Alarm Power LED (Green) Blinking Fault LED (Yellow) Not lit AL1 LED (Red) Not lit Blinking Blinking AL2 LED (Red) Not lit Not lit Blinking Maintenance LED (Blue) Not lit...
  • Page 39 7 Alarm Operation Multiple Channel Display If a gas alarm is activated, the channel status page including the channel status of the activated gas alarm will be displayed. Moreover, if a gas alarm is activated on more than one channel, the channel status page including the channel status of the last gas alarm will be displayed for 10 minutes.
  • Page 40 7 Alarm Operation Gas Alarm Operation (Multiple Channel Display) Warm-up Normal Operation Indication/Output 1st Stage 2nd Stage Gas Alarm Gas Alarm Gas Alarm Power LED (Green) Blinking Fault LED (Yellow) Not lit AL1 LED (Red) Not lit Blinking Blinking AL2 LED (Red) Not lit Not lit Blinking...

  • Page 41: Fault Alarm Operation

    7 Alarm Operation 7.2 Fault Alarm Operation This product can detect an internal failure, and, depending on the nature of the failure, the yellow fault LED, LCD, and fault alarm contact will be activated. Further, the corresponding event icons will be displayed on the screen.
  • Page 42 7 Alarm Operation *1: The LEDs on the main unit operate in response to any sensor channel status in the connected gas detectors. For example, if the sensor channel in one of the subunits enters 1st stage gas alarm mode, the AL1 LEDs on both the main unit and the subunit will start blinking.
  • Page 43 7 Alarm Operation Fault Alarm Operation (Multiple Channel Display) Low Flow Rate Other Failure Indication/Output Normal Normal Warm-up Warm-up Operation Operation Power LED (Green) Blinking Blinking Fault LED (Yellow) Not lit Blinking Blinking AL1 LED (Red) Not lit (Blinking in the event of a gas alarm) AL2 LED (Red) ⇕...
  • Page 44 7 Alarm Operation Expansion Unit‘s Fault Alarm Operation If the expansion unit cannot communicate with the main unit or if the channel allocation (unit/analog output/relay output allocations) is not set. the expansion unit’s analog output and relay outputs operate in the manner shown in the table below to indicate that there is a fault. Fault Alarm Normal Operation Expansion Unit’s Fault Alarm Operation...

  • Page 45: Maintenance Mode

    8 Maintenance Mode Maintenance Mode Maintenance mode is used to deactivate all the alarm contacts and analog outputs during maintenance or inspection. From Menu, select “Maint mode” and then set the channels to maintenance mode 1 or 2 depending on your purpose. •...

  • Page 46: Gas Alarm Operation During Maintenance Mode

    8 Maintenance Mode Ref. Refer to 10.2 “Maintenance Mode” for how to set the maintenance mode. 8.1 Gas Alarm Operation during Maintenance Mode This section describes the operation when a gas alarm is activated when in maintenance mode 1 or 2. If a gas concentration or test value exceeds the alarm set value, a gas alarm will be activated.
  • Page 47 8 Maintenance Mode NOTICE If maintenance mode is cleared while a gas or fault alarm is activated, the gas or fault alarm contacts will get activated, and the analog output will change to the value corresponding to the gas concentration.

  • Page 48: Operation

    9 Operation Operation 9.1 Gas Concentration Screen (Home) • This product can display gas concentrations and setting information for up to 16 different sensor channels. • When the sensor channel is invalid, “ − − − − − “ is displayed for its gas concentration. •...

  • Page 49: Deactivate Safety Lock

    9 Operation 9.2 Deactivate Safety Lock The safety lock disables key operations to prevent unintended operation. The lock icon appears in the bottom right corner of the screen when the lock is activated (locked). Even while the lock is activated (locked), it is possible to navigate through the channels by pressing ] or [ To deactivate the safety lock, press and hold [ ] until the lock icon disappears.

  • Page 50: Operation Menu

    10 Operation Menu Operation Menu 10.1 Menu Items This product features menu items corresponding to the operations. It offers three levels of access privileges: supervisor and operator. The accessible menu items vary depending on the privilege level. To access supervisor mode, a password is required. The following table lists menu items and associated access privileges.
  • Page 51 10 Operation Menu Access to Menu To go to Menu, press and hold [ ] while on the gas concentration screen (Home). If the lock icon appears in the bottom right corner of the screen, the safety lock must be deactivated to access Menu.

  • Page 52: Maintenance Mode

    10 Operation Menu 10.2 Maintenance Mode Maintenance mode is used to deactivate all the alarm contacts and analog outputs during maintenance or inspection. From Menu, select “Maint mode” and then set the channels to Maintenance mode 1 or 2 depending on your purpose. Refer to 8 “Maintenance Mode” for the operation while in maintenance mode operation.
  • Page 53 10 Operation Menu Go to the Maintenance Mode Screen Deactivate the safety lock ⇒ Go to Menu ⇒ Select “Maint mode” ⇒ Maintenance Mode screen ① ➊ : Maintenance mode 1 : Maintenance mode 2 ② : Checked (selected) : Unchecked (not selected) ➋...

  • Page 54: Event History

    10 Operation Menu 10.3 Event History Past events (such as gas alarms, fault alarms, and maintenance modes) can be viewed from this menu. Go to the Event History Screen Deactivate the safety lock ⇒ Go to Menu ⇒ Select“Event history”⇒ Event History screen ①...

  • Page 55: Ongoing Events

    10 Operation Menu 10.4 Ongoing Events Ongoing events (such as gas alarms, fault alarms, and maintenance modes) can be viewed from this menu. Go to the Ongoing Events Screen Deactivate the safety lock ⇒ Go to Menu ⇒ Select“Ongoing events”⇒ Ongoing Events screen ①...

  • Page 56: Zero And Span Adjustments

    10 Operation Menu 10.5 Zero and Span Adjustments This menu is used to adjust the sensor reading to zero (or 20.9% for oxygen). Only service personnel are allowed to perform span adjustment. No on-site span adjustment is required at sensor unit replacement because each sensor unit has been span-adjusted when shipped.
  • Page 57 10 Operation Menu Zero Adjustment Procedure For accuracy, perform zero adjustment twice after the unit is turned on. The timing differs based on the sensor type as shown in the table below. Sensor Type 1st Zero Adjustment 2nd Zero Adjustment CDS-7 24 hours 30 minutes...

  • Page 58: Individual Ch Information

    (AO module), the AO module address appears, and it cannot be reallocated to the main unit from here. For the procedure to reallocate the channel to the expansion unit (AO module), refer to 7.7 “Power-on Check” in the PS-8 Series Instruction Manual for Installation.
  • Page 59 10 Operation Menu Access Privilege Item Description Displays the relay contact output module (DO Relay output allocation module address and terminal No.) allocated to △ △ the channel. Sets the expansion unit’s 1st stage gas alarm Relay (Alarm1) contact to: ●...
  • Page 60 10 Operation Menu ① ③ ② ① Channel number ② Item : Cursor location ③ How to View the Channel Information Press [ ] or [ ] to navigate through the channels. Press [ ] or [ ] to navigate through the pages. How to Set the Channel Information Some items are password protected.
  • Page 61 10 Operation Menu A. Tag Name and Gas Name Entry Enter the password to gain access to supervisor mode. Select the channel and page where the target item is located. * Pressing [ ] or [ ] navigates through the channels. * Pressing [ ] or [ ] navigates through the pages.
  • Page 62 10 Operation Menu B. Sensor Info Reading Enter the password to gain access to the supervisor mode. Select the channel and page where the target item is located. * Pressing [ ] or [ ] navigates through the channels. * Pressing [ ] or [ ] navigates through the pages.
  • Page 63 10 Operation Menu C. Alarm Settings (AL1/AL2) Enter the password to gain access to the supervisor mode. Select the channel and page where the target item is located. * Pressing [ ] or [ ] navigates through the channels. * Pressing [ ] or [ ] navigates through the pages.
  • Page 64 10 Operation Menu D. Zero Suppr / %FS. (+/-) The sensors used in this product are influenced by environmental factors such as temperature, humidity, and interfering gases, which may cause readings to fluctuate even under normal conditions. The zero suppression function renders fluctuations in readings below the preset value invisible, making the effects of environmental changes and interfering gases less noticeable under normal conditions.

  • Page 65: Password Entry

    10 Operation Menu Change the zero suppression value in the positive/negative area. * Pressing [ ] or [ ] increases or decreases the value. * To cancel the change, press [ Press [ ] to save the setting. The value will stop blinking. ⇒...

  • Page 66: Gas Alarm Test

    10 Operation Menu 10.8 Gas Alarm Test This test mode is used to increase or decrease a simulated gas concentration value to activate a gas alarm for maintenance or testing purposes per channel. Gas alarm test cannot be performed on the channel which is in the warm-up cycle. •...

  • Page 67: Fault Alarm Test

    10 Operation Menu Press [ ] to save the set value. The value will stop blinking. Press [ ] to move the cursor to Exe. The display will change to Exe. Press and hold [ ] to execute the test. * To view the gas concentrations when in the gas alarm test, move the cursor to , and then press and hold [...
  • Page 68 10 Operation Menu Go to the Fault Alarm Test Screen Deactivate the safety lock ⇒Go to Menu ⇒ Select“Fault alarm test”⇒ Fault Alarm Test screen ③ ① ④ ② : Checked (selected) : Unchecked (not selected) : Cursor location ① Channel number ②...

  • Page 69: Clock And Language

    10 Operation Menu 10.10 Clock and Language The clock and display language can be set from this menu. Go to the Clock and Language Screen Deactivate the safety lock ⇒ Go to Menu ⇒ Select“Clock & Language⇒ Clock and Language screen ②...

  • Page 70: Device Information

    10 Operation Menu Save the setting. (a) For the blinking item, press [ ] to save the setting. (b) For the date entry screen, press and hold [ ] to save the setting. (c) For the text entry screen, press and hold [ ] to save the setting.
  • Page 71 10 Operation Menu Access Privilege Item Description Sets the IP address for Ethernet to: IP address “ ”. xxx.xxx.xxx.xxx ● ● Default: 192.168.0.101 Sets the subnet mask for Ethernet to Subnet mask “xxx.xxx.xxx.xxx”. ● ● Default: 255.255.255.0 Sets the default gateway for Ethernet to: Default gateway “...
  • Page 72 10 Operation Menu ② ① ① Item : Cursor location ② How to View the Device Information Press [ ] or [ ] to navigate through the pages. How to Set the Device Information Go to the page where the target item is located. * Pressing [ ] or [] navigates through the pages.

  • Page 73: Software Version

    10 Operation Menu Auto 20.9vol Adjustment The oxygen sensor output decreases over time, due to the characteristics of the sensor. This function corrects the sensor output, which will then regularly correct the indicated value. The auto 20.9vol adjustment cannot be used under the following environments. Set “Auto 20.9vol”...

  • Page 74: Other Useful Functions (Shortcuts)

    10 Operation Menu 10.13 Other Useful Functions (Shortcuts) This product has the following key operations in addition to the operations to be performed through Menu. When more than one key needs to be pressed or pressed down simultaneously, ensure that they are pressed or pressed down at the same time. Otherwise, that may result in a different setting from the intended one.
  • Page 75 10 Operation Menu If the adjustment fails, the failed channels will be displayed in the sensor channel status pane. NOTE Zero adjustment is not possible on AI module. Refer to 10.5 “Zero and Span Adjustments” before performing zero or span adjustment.
  • Page 76 Also check that the addresses of the subunits and modules are not duplicated. If duplicated, change their addresses. For the address setting procedure, refer to “7.3.1 Subunit Address Setting” and “7.3.2 Expansion Module Address Setting” in the PS-8 series Instruction Manual for Installation.
  • Page 77 (1) Turn off the product by setting the power switch to the off position. (2) Remove the joints which connect between the main unit and other units (subunit/expansion unit). For how to remove joints, refer to “ 7.2.3. Joint Removal” in the PS-8 series Instruction Manual for Installation.

  • Page 78: Web Server

    11 Web Server Web Server This product employs the TCP/IP protocol (Ethernet) and can function as a web page server (“Web Server” in this manual). These web pages (product status, settings, and logs) can be viewed on external computer equipment (e.g., PC) through a web browser such as Microsoft Edge and Google Chrome. The settings can also be altered from the web pages.

  • Page 79: Network Environment Setting

    11 Web Server 11.1.3 Network Environment Setting The PS-8 unit cannot be operated via a proxy server. Turn off the proxy server on your PC. 11.1.4 Communication Check Check that communication has been established between your PC and the PS-8 unit. Open a web browser (e.g., Microsoft Edge, Google Chrome), and enter the PS-8’s IP address (e.g., http://192.168.0.101) in the address bar.

  • Page 80: Home Screen On Web Server

    11 Web Server 11.2 Home Screen on Web Server This product features menu items corresponding to the operations. The Home screen displayed on the PC when the PC is connected to the PS-8 unit is depicted below. ➌ ➎ ➊ ➍...

  • Page 81: State List

    11 Web Server 11.3 State List This screen shows statuses per channel, such as gas concentration, alarm status and device mode. For invalid channels (i.e., a channel with no gas sensor installed), their gas concentrations will be replaced by “ − − − − − ”. Screen Description ①...

  • Page 82: Maintenance Mode

    11 Web Server Item Description Displays the sensor channel number. ① Gas name Displays the gas name. ② Tag name Displays the tag name. ③ Displays the numeric measurement of gas concentration. Gas concentration The baseline value (e.g., 0 or 20.9 for oxygen) appears during ④...
  • Page 83 11 Web Server Item Description All ch. button Selects all valid channels at once. ① Deselect all button Deselects all valid channels at once. ② Maintenance mode Selects the mode from OFF, Maint.1 or Maint.2 in the ③ selection pulldown menu. Set button Sets the selected channels to the mode selected in ③.

  • Page 84: Event History

    11 Web Server 11.5 Event History Past events (such as fault alarms, gas alarms, and maintenance modes) can be viewed from this menu. Screen Description ① ② ③ ④ ⑤ Item Description Displays the date and time when the event occurred or Occurrence time ①...

  • Page 85: Trend Graph Display

    11 Web Server Trend Graph Display To view each event in the form of a trend graph, click on the corresponding Selection button on the event history screen. ② ③ ④ ⑤ ① ⑥ ⑦ Item Description Occurrence time Displays the date and time when the event occurred. ①...

  • Page 86: Ongoing Events

    11 Web Server 11.6 Ongoing Events Ongoing events (such as fault alarms, gas alarms, and maintenance modes) can be vie wed from this menu Screen Description ⑤ ① ② ③ ④ Item Description Occurrence time Displays the date and time when the event occurred. ①...

  • Page 87: Zero And Span Adjustments

    11 Web Server 11.7 Zero and Span Adjustments This menu is used to adjust the sensor reading to zero (or 20.9% for oxygen). Only service personnel are allowed to perform span adjustment. No on-site span adjustment is required at sensor unit replacement because each sensor unit has been span-adjusted when shipped.
  • Page 88 11 Web Server Zero Adjustment Procedure Set the target channel to maintenance mode (11.4 “Maintenance Mode”). Click Zero adjustment button for the target channel. *Clicking Batch zero adjustment button selects all valid channels at once. A dialog box appears asking, “Do you want to run it?” Click Yes in the dialog box.

  • Page 89: Individual Ch Information

    11 Web Server 11.8 Individual CH Information Setup details for each channel can be viewed and changed from this menu. Four channels are simultaneously displayed on the screen. Refer to 10.6 “Individual CH Information” for further details. Screen Description ② ①...

  • Page 90: Password Entry

    11 Web Server 11.9 Password Entry A password must be entered to access supervisor mode. Screen Description ① ② ③ Item Description Password entry box For entering the 4-digit password. ① Set button Saves the password entered in ①. ② Displays the remaining time until the password expires.

  • Page 91: Gas Alarm Test

    11 Web Server 11.10 Gas Alarm Test This test mode is used to increase or decrease a simulated gas concentration value to activate a gas alarm for maintenance or testing purposes per channel. • Before performing a gas alarm test, refer to 10.8 “Gas Alarm Test” for correct operation.
  • Page 92 11 Web Server Item Description Alarm test batch Cancels the gas alarm test on all valid channels at once. ① cancellation button Displays the sensor channel number. ② Normal Appears during normal operation. Warm-up Highlighted in light blue during the warm-up cycle. Alarm1 Highlighted in yellow when a 1st stage gas alarm is activated.

  • Page 93: Fault Alarm Test

    11 Web Server 11.11 Fault Alarm Test This test mode is used to simulate a device fault (e.g., sensor failure, low flow rate, and communication error) to activate a fault alarm for maintenance or testing purposes per channel. Four channels are simultaneously displayed on the screen.
  • Page 94 11 Web Server Item Description Pre ch. button Displays the previous four channels. ① Next ch. button Displays the next four channels. ② Channel number Displays the sensor channel number. ③ All ch. button Selects all test items at once for each channel. ④...

  • Page 95: Clock And Language

    11 Web Server 11.12 Clock and Language The clock and display language can be set from this menu. Screen Description ① ② ③ ④ ⑤ ⑥ Item Description Set button Saves the displayed settings. ① Date and Time Sets the date and time. ②...

  • Page 96: Device Information

    11 Web Server 11.13 Device Information Set details of the product can be viewed and changed from this menu. Before setting the device information, refer to 10.11 “Device Information” for correct operation. Screen Description ① ② Item Description Set button Saves the displayed settings.

  • Page 97: Software Version

    11 Web Server 11.14 Software Version The software version can be viewed from this menu. Screen Description ① Item Description Software Ver. Displays the software version of the main unit. ① 11.15 Firmware Update The firmware can be updated from this menu. •...
  • Page 98 11 Web Server Screen Description ① ② ③ ④ Item Description Unit Displays the name of the unit to be updated. ① Object Displays the name of the module to be updated. ② Update File selection button Selects the update file. ③...

  • Page 99: Maintenance

    12 Maintenance Maintenance This chapter explains the routine check, periodical inspection and part replacement procedures. 12.1 Routine Check, Periodical Inspection and Replacement Parts Routine checks are carried out by the user(Supervisor or Operator), while periodical inspections and part replacements are performed by New Cosmos or its authorized representative. Please refer to 12.2 for check/inspection procedures, and 12.3 for part replacement procedures.

  • Page 100: Check/Inspection Procedure

    12 Maintenance 12.2 Check/Inspection Procedure This section explains how to perform a routine check or periodical inspection. 1. Power LED Check Check that the power LED is lit. Power LED 2. LCD Indication Check Check that the gas concentrations are displayed on the LCD and that the product is in operation. In case of a zero drift, perform zero adjustment.
  • Page 101 12 Maintenance 5. Alarm Test Operation Check (1) Use gas alarm test mode to check the gas alarm operation. Check that the AL1 LED and AL2 LED are blinking when in gas alarm test mode. Refer to 10.8 “Gas Alarm Test” for the gas alarm test procedure. AL1 LED AL2 LED (2) Use fault alarm test mode to check the fault alarm operation.
  • Page 102 12 Maintenance 6. Pump Flow Rate and Airtightness Check Flow Rate Icon +F-Value Flow Rate Icon +F-Value Single Channel Display Multiple Channel Display Flow Rate Icon Event Single Multiple Flow Rate Function and Possible Cause Icon Channel Channel Display Display Normal Pump’s flow rate is normal.
  • Page 103 12 Maintenance Ensure that the flow rate and airtightness are checked after sensor or pump replacement. (1) Flow Rate Check Check that the normal flow rate icon appears on the screen. (2) Airtightness Check Rotate and loosen the nut. Disconnect the tube from the gas inlet, and completely block the inlet with a finger.

  • Page 104: Part Replacement

    12 Maintenance 12.3 Part Replacement This product has been designed such that its consumable and replacement parts can be easily accessed by the user. To order parts, please contact New Cosmos or its authorized representative. 12.3.1 Filter Element Replacement If the filter element is dirty, replace it with a new one by using the following steps. A low flow rate alarm may be activated when replacing the filter element.

  • Page 105: Activated Carbon Filter Replacement

    12 Maintenance 12.3.2 Activated Carbon Filter Replacement • Install the activated carbon filter only when the target gas is NF • Before activated carbon filter replacement, release the interlocks of external devices as needed to prevent their possible activation. • Replace the activated carbon filter inner sleeve (KF-6S-Y1) when replacing the sensor unit.

  • Page 106: Sensor Unit Replacement

    12 Maintenance 12.3.3 Sensor Unit Replacement • Check that the target gas and full scale value are correct before using a sensor unit. Also, check that the sensor expiration year/month has not been reached. Note: The target gas name, full scale value and expiration year/month are indicated on the sensor unit.

  • Page 107: Sampling Module Replacement

    12 Maintenance 12.3.4 Sampling Module Replacement • Before sampling module replacement, turn off the product or sensor unit. • Fully insert the sensor unit. If the sensor unit is not completely inserted, an airtight seal will not be created, and correct gas detection will not be possible. •...

  • Page 108: Fan Replacement

    12 Maintenance 12.3.5 Fan Replacement Replace the fan with a new one when it fails. The fan itself generally does not require replacement because it is included in the sampling module, which is periodically replaced. • Before fan replacement, turn off the product or sensor unit. •...
  • Page 109 12 Maintenance Disconnect the fan’s connector from the sampling module. Remove the three screws to detach the fan from the module. Screw x 3 Fan’s Connector Install a new fan into the sampling module. Connect the fan’s connector back. ● Tightening torque: 35 cN ⋅ m ●...

  • Page 110: Troubleshooting

    13 Troubleshooting Troubleshooting Before requesting a repair, please refer to the table below. If the product does not return to normal operation after performing the corresponding steps in the table or if your issue is not found in the table, consult New Cosmos or its authorized representative. If the product goes into any unintended mode during adjustment or setting, cease the use of the product and consult with your supervisor.
  • Page 111 13 Troubleshooting Problem/Error Message Probable Cause Solution/Reference “Error (During mode shift Ener maintenance mode, then lock)” appears on the Product is not in maintenance perform zero/span adjustment. screen during zero/span mode Refer to 10.2 “Maintenance Mode”. adjustment “Error (During a fault)” Remove the fault by referring to the appears on the screen Fault alarm is activated...
  • Page 112 13 Troubleshooting Event Icon Possible Cause Solution/Reference Detection Check and reconnect the units. Communication between units is not “Unit-to-unit comm. failure” working. Check that the subunits and No communication between expansion units are correctly connected. units Refer to 7.2 “Installation Procedure” of Instruction Manual for Installation.
  • Page 113 13 Troubleshooting Low Flow Rate Icons The low flow rate details can be viewed from the Ongoing Events screen (10.4 “Ongoing Events”). Icon Possible Cause Solution/Reference Detection “Low flow caution” Replace the filter element. Flow rate is too low due to Refer to 12.3.1 “Filter Element clogged filter element Replacement”.

  • Page 114: Specifications

    14 Specifications Specifications 14.1 Main Unit Model PS-8M, PS-8N Detection Principle Electrochemical, Hotwire semiconductor, Galvanic cell Gas Sampling Method Extractive type (0.5L/min) Flow rate automatically controlled PTFE with OD 6mm ID 4mm or OD 1/4 inch ID 11/64 inch Sampling Tubing Tube length to be at least 1 m but not more than 20 m Target Gas (As per the delivery specifications)
  • Page 115 14 Specifications Model PS-8N PS-8M Terminal: Terminal blocks (3-pin x 1 and 6-pin x 1) Applicable cable: CVV 1.25mm² Target signal: Power, gas alarm contact (1st and 2nd stages), and fault alarm contact signals Terminal: RJ-45 jack 8P8C None Applicable cable: STP Ethernet cable, Category 5e Applicable Cable for or higher External Terminals...

  • Page 116: Subunit

    14 Specifications 14.2 Subunit Model PS-8S Detection Principle Electrochemical, Hotwire semiconductor, Galvanic cell Gas Sampling Extractive type (0.5L/min) *Flow rate automatically controlled Method PTFE with OD 6mm ID 4mm or OD 1/4 inch ID 11/64 inch Sampling Tubing Tube length to be at least 1 m but not more than 20 m Target Gas (As per the delivery specifications) Detection Range...

  • Page 117: Expansion Unit

    14 Specifications 14.3 Expansion Unit Model PS-8EU AO Module DO Module AI Module Module Type (Analog output) (Contact output) (Analog input) Gas alarm contacts (1st and 2nd Signal Gas concentration analog signal stages) and Fault alarm contact Number of Outputs 4-20 mADC (common negative External with power supply)

  • Page 118: Warranty

    15 Warranty Warranty The warranty period is one (1) year from the date of purchase. You are entitled to the limited warranty, if the product malfunctions due to a manufacturing defect during normal use in accordance with the instruction manual, specifications, and labels. Warranty Scope If the product fails or is found to be damaged due to a manufacturing defect during the warranty period, and used in accordance with the instruction manual and specifications, we will provide a free...

  • Page 119: Detection Principle

    16 Detection Principle Detection Principle 16.1 Electrochemical Sensor (Catalytic Conversion) This sensor consists of three electrodes and an electrolyte, and the method adopted here is to produce electrolytic oxidation with a potentiostat circuit while keeping the working electrode at a constant potential against the reference electrode.

  • Page 120: Galvanic Cell Sensor For Oxygen Detection

    16 Detection Principle 16.3 Galvanic Cell Sensor for Oxygen Detection The sensor consists of two electrodes, a membrane, and an electrolyte. The electrodes are two different metals, noble metal (Pt, Ag) and base metal (Pb). The noble metal electrode has contact with air via a Teflon membrane. Connecting load resistance to both electrodes generates a potential difference, which promotes the following reactions: Noble metal electrode: + 2H...

  • Page 121: Glossary

    17 Glossary Glossary Term Definition Gas detector Device used to detect the presence of a target gas and to give its (or gas detector head) concentration in the form of an electrical signal. Specific gas to be detected, concentration displayed, and used to Target gas trigger alarms.
  • Page 122 Revision GAE-179-00 December 2024 00 (Initial issue) Additional copies of this instruction manual may be purchased. Contact New Cosmos or its authorized representative for ordering. Authorized representative: Manufacturer: NEW COSMOS ELECTRIC CO., LTD. 2-5-4 Mitsuya-naka, Yodogawa-ku, Osaka 532-0036, Japan www.newcosmos-global.com...

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