X4 Portable Gas Detection Instrument Operators Manual Version 1.
EXSENS TECHNOLOGY (PTY) LTD ExSens X4 Instrumentation ExSens X4 ExSens Technology (Pty) Ltd Phone: 011 397 1119 Fax: 086 425 0675 Volume 1.
TABLE OF CONTENTS SCOPE ............................................................................................................................................................................ 4 DOCUMENT OVERVIEW ................................................................................................................................................. 4 IDENTIFICATION.....................................................................................................................................
Specification Gas Types Flammable Toxic x 2 Oxygen CO/H2S = 0-500/0-100ppm Sensors and measuring range CH4 = 0-100% LEL Measuring principal Catalytic Combustion Calibration gasses % = up to 50% full-scale Response time T90 Less than 15 seconds Resolution 0.1% < 6 ppm Long term drift ± 0.1% 2% Full scale /month Min & max pressure - 10 KPa to + 50 KPa Electro-chemical 0-25% by volume Electro-chemical ppm = 20-200 Bottled / Fresh Air Less than 35 seconds Less than 15 sec. 0.
SCOPE The document outlines the use of the ExSens X4portableGas Detection Instrument capable of detecting up to four gasses and displaying the readings on a graphic display. This document also describes the capability of responding to commands on a serial and radio interface. DOCUMENT OVERVIEW This document contains all of the required operational information as needed by the client.
CONDITIONS OF CERTIFICATION: US Market Note 1: This ground penetrating UWB device shall be operated only when directed at the ground within one meter of the surface under analysis. Note 2: Operation under the provisions of this section is limited to GPRs and wall imaging systems operated for purposes associated with law enforcement, fire fighting, emergency rescue, scientific research, commercial mining, or construction. Note 3: Devices used in the US must be coordinated with the FCC prior to use.
Canadian Market Note 1: This Ground Penetrating UWB Device shall be operated only when directed at the ground within one meter of the surface under analysis Remarque 1: ce dispositif UWB pénétrant dans le sol ne doit être utilisé que lorsqu'il est dirigé vers le sol à un mètre de la surface analysée Note 2: This Ground Penetrating UWB Device shall be operated only by law enforcement agencies, scientific research institutes, commercial mining companies, construction companies, and emergency rescue or fire f
CONDITIONS OF MANUFACTURE The battery protection circuit must be fully encapsulated. The fuses must be fully encapsulated. SPECIAL CONDITIONS OF SAFE USE (X) To maintain the IP rating, all screws must be fitted and tightened to the correct specification. Do not charge in hazardous area.
Instrument functionality NOTE: The EXSENS X4 instrument hasthree buttons (UP of the functional menus.
1.2 Instrument description The instrument housing is made of semi opaque molded polycarbonate with black TPE over-mold. The housing is held together with 6 x M3 stainless steelcap screws. The housing with its TPE over-mold will form a natural seal between the two halves of the housing. The instrument is capable of displaying up to four different gas readings on a color graphic display. The instrument is intended for use as a continuous measuring device for portable and handheld applications.
BATT VOLTAGE: PASS / FAILED Once the self-test has completed the instrument will display the company logo as the start-up screen. Figure 3: LOGO Display screen Once the initialization is complete, the instrument will switch to the operational screen. While in the warm-up period the readings will be blanked off. Once warm-up has completed the readings will be active.
The last sensor port will always be an oxygen sensor that will measure from 0.0% to 25.0%. On the display the real time TWA (Time Waited Average) and STEL (Short Term Exposure Limit) values will be calculated and displayed. Lastly the battery capacity with the current time and date of the instrument is displayed. Within the first 30 minutes when the instrument is removed from the charger a calibration menu is available to the user to manually calibrate the instrument. (If configured to enable this feature).
Figure 6: Sensor Zero screen If the zero function was selected all the sensor zero values will be calculated at the same time, do not expose the instrument to any calibration gas until zeroing has been completed. The calibration gas values are pre-programmed using the configuration software of the instrument. These are used as default values. The user can however change this to the appropriate gas concentration at the time of calibration.Scroll UP or ENT key to start the calibration of the selected port.
ZERO Flammabl Toxic 1 Toxic 2 Oxygen Figure 8: Calibration screen Repeat for every sensor fitted. Each calibration will be stored in the service record file. The manual calibration option can be enabled or disabled. If disabled, only the information menu will be available. The information menu can be accessed by pressing and holding the ENT key.
The Setup Info Icon- will supply the user with all the preset alarm levels for the installed sensors The ClockIcon- will give the user the status of the onboard Real Time Clock. The Battery Info Icon- will supply the battery information, the voltage, current drawn and capacity left. The Test Info Icon – will display the tested values for each gas within the switch on time selected. The Peak Info Icon – will display the peak value for the day after the switch on time has expired.
The following colors on Graph screen re-present the different gas types: Blue – Oxygen Yellow – Toxic 1 Cyan – Toxic 2 Red – Flammable Exit any menu by pressing the UP and DWN keys at the same time. All menu’s when entered will timeout automatically once no key press is registered. The only exception is the Graph menu where the user must exit. 1.
Two instruments can be linked as per the above procedure. One instrument can be lowered into the manhole by means of a lanyard attachment or extended into a confined space by means of an extension rod attachment (sold separately, please consult with your accredited distribution agent). The other instrument can be held by the person that must enter the manhole and/or confined space. The person can then view the remote gas readings in the manhole and/or confined space and verify that it is safe to enter.
DISPLAY_5_PPM_1 This option will allow theExSens X4 Instrument to display or block-off the lower 5ppm of the measured gas value for toxic sensor 1. If blocked off,it allows for a smoother display if the sensor has a constant moving baseline. (Default = DISABLED). DISPLAY_10_PPM_2 This option will allow the ExSens X4 Instrument to display or block-off the lower 10ppm of the measured gas value for toxic sensor 1. If blocked off, it allows for a smoother display if the sensor has a constant moving baseline.
SWITCHTIME Once an instrument is removed from the charger, a timer is started that allows the user to do a functional test on the instrument. When the timer expires the test values of each installed sensor is stored. This timer is programmable from 1 minute to 30 minutes. (Default = 30 minutes). FLAM_LEL This option will allow the instrument to display the flammable gas reading as a 0% to 99% LEL value. The alarm levels will also be automatically converted. (Default = DISABLED).
2. All replacement parts under this warranty shall be supplied by ExSens Technology factory, unless otherwise authorised in writing. 3.
loss of profit orany claims of third parties), and shall not be extended, altered, or varied except by a writteninstrument signed by ExSens Technology. 5. Except as herein expressly stated, ExSens Technologydoes not warrant the goods covered by thisagreement, and no warranty expressed or implied or statutory is made by ExSens Technology exceptas herein set forth. 6.
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