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GD1

Page 15 of 76

850-816926-EN R06

2.5.1.

Alternative wiring configurations

The default wiring configuration for the GD1 is with power and 4-20 mA connected to the
TX side, and with power supplied to the RX via the TX junction box.

Wiring alternative 1: System power connected on the receiver side

Wiring alternative 2: Power on both receiver and transmitter side

The instrument 0 V shall be the same for both RX and TX.

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Summary of Contents for GD1 MK3

Page 1: ...P N 850 816926 EN Rev6 Operating Manual Simtronics GD1 MK3 Toxic Open Path Gas Detector...

Page 2: ...hout the written consent of Simtronics A S All of the information that is provided in this document is accurate to the best of our knowledge As a result of continuous research and development the spec...

Page 3: ...s products UNLESS SUCH PRODUCTS HAVE BEEN SELECTED BY SIMTRONICS ACCORDING TO THE APPLICATION Ownership clauses The drawings specifications and information herein contain confidential information that...

Page 4: ...rs correct function inside specified tolerances Warranty is void if the detector has been installed or operated in conflict with specifications and procedures given in this operating manual Destructio...

Page 5: ...eparation 21 3 2 Coarse alignment 21 3 3 Fine tuning 23 3 3 1 Using a Web browser for tuning of signal strength 23 3 3 2 Using a HART for tuning of signal strength 30 3 4 Function test 35 3 4 1 Perfor...

Page 6: ...nical Specifications 59 10 System description 61 10 1 System 61 10 2 Application areas 62 10 3 Positioning considerations 63 10 3 1 General positioning considerations regarding a gas cloud 63 10 4 Det...

Page 7: ...e optical line of sight RECEIVER TRANSMITTER 1 2 Definitions TX Transmitter RX Receiver Absolute transmission Strength of the optical signal Relative transmission The relative strength of the optical...

Page 8: ...GD1 Page 8 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 9: ...d power to the GD1 is connected to the TX Between the TX and RX there is a cable with communication and power The TX where the laser is located sends a diffused light beam invisible to the receiver Th...

Page 10: ...etector should be attached to a mechanically rigid structure The GD1 should be positioned as to avoid more than one TX transmitting into a RX Failing to do this can lead to interference between the de...

Page 11: ...icient rigidity If mounting height is increased pole pipe diameter should increase accordingly 2 4 Sun shielding The transmitter and receiver are fitted with a sun shield as standard In locations wher...

Page 12: ...io frequency interference Earth connection points are provided on the underside of the GD1 housing and inside the Junction Box The connection terminals are accessed by removing the covers of the junct...

Page 13: ...6 Violet Ethernet Signal to control room 7 Blue 4 20 mA primary gas value and HART Default is source configuration with 4 20 mA measured between terminals 7 and 2 0V For sink configuration 4 20 mA is...

Page 14: ...Return from Tx 0 V Return GND 3 Green Do not connect 4 Yellow Do not connect 5 Black Do not connect 6 Violet Do not connect 7 Blue Tertiary current loop Relative transmission configurable 8 Red Do no...

Page 15: ...for the GD1 is with power and 4 20 mA connected to the TX side and with power supplied to the RX via the TX junction box Wiring alternative 1 System power connected on the receiver side Wiring altern...

Page 16: ...that the total impedance of the current loop including cabling connections and input on control system should be maximum 500 The GD1 is by default delivered with terminal blocks for wires up to 2 5 m...

Page 17: ...the installations grounding principles regulations allows it the shield is terminated to local ground via the internal earth point at the detector instead 2 5 4 Performing loop test After powering up...

Page 18: ...D GD1 In the web browser of your device enter the GD1 Service Interface on the address http 192 168 1 237 3 Log into the Service Interface with the Operator password gd1tlc After logging in as Operato...

Page 19: ...Page 19 of 76 850 816926 EN R06 5 When clicking Test the test value will be forced on the 4 20 mA Loop1 terminal terminal 7 in the GD1 Junction Box Verify that the analogue output matches the test va...

Page 20: ...GD1 Page 20 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 21: ...uring commissioning Power up the GD1 system and let it warm up for 30 minutes before doing the final alignment in section 3 3 3 2 Coarse alignment The objective for the coarse alignment is to set an i...

Page 22: ...ion and horizontal by hand until the laser spot hits the target plate on the TX Tighten screws 2 and 3 fully on RX so it cannot be moved by hand anymore 6 Swap sides Alignment Laser and Laser Target P...

Page 23: ...be performed with two different methods Using a Web browser through an Ethernet connection This is the preferred method Using a HART terminal connecting through the 4 20 mA current loop Primary curren...

Page 24: ...1 237 4 Log into the Service Interface with the Operator password gd1tlc After logging in as Operator more functions are accessible as illustrated in the right image 5 Click Commissioning followed by...

Page 25: ...lignment process since it will remember the highest absolute transmission seen since going into align mode A new reference can be set at any time by pressing Align again This reference is than used as...

Page 26: ...h for the alignment mechanism to be able to move in the vertical direction Note that the absolute and relative transmission will typically drop slightly when screw 2 is loosened If the values drop sig...

Page 27: ...suggested values this is an indication that the fine alignment needs to be improved the RX is poorly aligned or the lenses are dirty The RX is usually well enough aligned during the Coarse alignment...

Page 28: ...ocedure In some cases it can take several minutes for Init to finish 20 When the GD1 is in Measuring mode check that the noise level is OK by checking how the H2S output is fluctuating The H2S level c...

Page 29: ...the signal strength too much a drop of 5 in relative transmission is fine 22 When finished minimizing the noise enter Alignment mode click Done and Save on the following screen 23 Verify that the GD1...

Page 30: ...gning avoid fog mist steam rain snow etc 2 Connect the HART terminal between terminal 7 and 2 in parallel with a resistor as shown in the figure to the right See section 0 for a more detailed descript...

Page 31: ...s increasing and the value on the mA meter will increase If the signal strength is increased to above 14 mA the scale will automatically be increased so the new best position again is 14 mA By outputt...

Page 32: ...maximum 13 Tighten screw 2 14 Store the current signal strength absolute transmission and exit Alignment mode by entering the following command in the HART terminal SAV Terminal response SM OK Saves t...

Page 33: ...nsmission value received in the step above Terminal response REGISTER 2 TRANS_REF transmission reference Check that the absolute transmission is as expected indicated in the graph below The obtained a...

Page 34: ...ode and initialize reboots the system Note After initializing has completed the GD1 will enter Measuring Mode normal operational mode The initialization can take up to 5 minutes Note As a default the...

Page 35: ...g the procedure below Note To conform with the SIL 2 Safety Integrity Level certification a yearly functional test is required Step description Illustration response 1 Clean the lenses on the TX and R...

Page 36: ...m m 1 50 27 100 54 185 100 50 full scale 2 300 162 690 373 out of default range 1 The expected response on the GD1 can be calculated from the following formula Response_GD1 length_test_cell meters gas...

Page 37: ...ration is 10 000 100 000 ppm 1 vol 10 vol 3 Position the Test Cell in front of the receiver RX as indicated in the figure 4 Verify the response in the GD1 spectrum The output should change according t...

Page 38: ...ified by using the formula in step 4 Note Depending on the precision of the gas mix inside the Test Cell do not expect to see an exact 1 1 response compared to the test gas concentration 5 Run loop te...

Page 39: ...reading3 4 20 mA 0 14 mA 4 mA 0 full scale 20 mA 100 full scale and higher Early Dirty Optics Warning 90 signal reduction 3 mA 2 10 Detector will still output gas concentration if reading is 10 full s...

Page 40: ...e Exhaust must be released to a safe area or into a suitable ventilator system Dimension of the valve nozzles are 6 4 mm 1 4 OD 2 Open both valves on the Test Cell 3 Start the filling of H2S from the...

Page 41: ...t sand or other hard minerals using a soft brush or cloth bulb blower or dry and clean compressed gas or air If using a compressed air gun or a cloth use it very lightly 2 Spray the lens with a dilute...

Page 42: ...GD1 Page 42 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 43: ...or defects The following list may be helpful Issue Possible source of problem Suggested correction Clean optics warning 3 mA Dirt on lens Clean optics see section 5 2 Detector out of alignment Realig...

Page 44: ...gnal Tune alignment as described in section 0 Interfering detector See section 6 3 Other error Check error code in the Web Service or by HART See section 0 for a description and suggestion on how to s...

Page 45: ...15 High transmission Relative transmission 125 Redo alignment Make sure lenses are clean before aligning 16 Timeout Initialization took too long time Reboot the detector Contact Simtronics if Error p...

Page 46: ...high values of H2S and is described in section 6 3 To tune for less noise on the GD1 the alignment can be adjusted slightly as described in the procedure below Step description Illustration 1 Clean th...

Page 47: ...If the signal is OK and relative transmission did not drop too much continue to the step 9 7 If the signal still needs tuning go back to step 6 If it is not possible to get low fluctuations by tuning...

Page 48: ...veral GD1 s are positioned so the laser beam does not affect other detectors If it is not possible to organize the detectors so they will not interfere there is a third solution as illustrated below A...

Page 49: ...ile Simtronics can create an encrypted settings file that on upload to the GD1 can change critical detector settings This can be used in situations where the customer requests a settings change for ex...

Page 50: ...Service Interface as described in section 10 5 IP address http 192 168 1 237 2 Enter the Diagnostics page Click Download config file and store this in a safe place This file can be used later to go b...

Page 51: ...816926 EN R06 4 Click the arrow to start uploading the file to the GD1 5 The new settings are being uploaded 6 When the uploading is finished click Go to return to the Diagnostics page Click Done on...

Page 52: ...GD1 Page 52 of 76 850 816926 EN R06 7 Click Init to restart the GD1 and initiate the new settings 8 After some time the GD1 should enter Measuring mode Configuration upload finished...

Page 53: ...X X Flameproof joints have values different from those specified in the tables of standard EN 60079 1 Simtronics does not allow repairs and disclaims any responsibility for material modifications The...

Page 54: ...GD1 Page 54 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 55: ...ools Alignment Interface Unit and carry case GD1 X00 TT05 Gas Test Cell Kit long version Airtight chamber for function and calibration tests The chamber has a length of 54 cm Spare part Part Number De...

Page 56: ...16926 EN R06 499 817033 Alignment kit reflector plate 499 816845 Wireless router 419 906123 Laser glasses 814 816855 Spare screws and nuts for the GD1 700 816859 All typical tools needed for alignment...

Page 57: ...and Receiver T Transmitter only R Receiver only 31 H2S KH 0 200 ppm m scale KJ 0 500 ppm m scale KK 0 1 000 ppm m scale KL 0 2 000 ppm m scale KM 0 5 000 ppm m scale KN 0 10 000 ppm m scale 0X SS316...

Page 58: ...GD1 Page 58 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 59: ...ity 8 ppm m 4 of full range Response time 5 sec OPTICS Alignment 0 3 Optics Heated Transmitter and Receiver Obscuration 98 to signal Beam block 2 mA Optional Warning 3 mA 90 to signal Early clean opti...

Page 60: ...ONMENTAL Ingress protection IP66 IP67 IEC 60529 Humidity operation 0 100 RH Humidity storage 0 95 RH MECHANICAL TX and RX Housing Material Stainless steel ASTM 316 Weight 6 Kg 12 lbs each Dimensions R...

Page 61: ...onal methods for detecting H2S MOS or EC cell the GD1 needs no recalibration and can replace multiple standard detectors to cover the same potential leak area The measurement technique used in the GD1...

Page 62: ...an area The GD1 continuously monitors the measuring path and the optical and electronic functions The detector will always show correct gas concentration as long as there are no error messages The tra...

Page 63: ...nce from the leak source increases The detector should therefore be placed as close as possible to potential leakage sources Normally prevailing wind directions must be taken into account when positio...

Page 64: ...as cloud in this example we would expect the following signals from the GD1 Example 1 gas cloud characteristics C 5 ppm L 15 meters Expected measurement of the GD1 C L 5 ppm 15 m 75 ppm m Example 2 ga...

Page 65: ...cumstances it might be requested by the user to be able to connect with cable and not the Wireless router Below is a description on how to connect to the GD1 Service Interface with a web browser Note...

Page 66: ...uter or Ethernet cable In the web browser of the device enter the GD1 Service Interface on the address http 192 168 1 237 3 Log into the Service Interface with the Operator password gd1tlc After loggi...

Page 67: ...e data log can be downloaded for review of for example gas releases recorded during the latest months The GD1 can typically store several years of data logging before it is starting to overwrite the o...

Page 68: ...rument Log page the operator set up what data should be logged and at what interval Up to six data variables can be logged and is chosen from a drop down menu as shown below 5 Click Start to start log...

Page 69: ...6 The data log can be downloaded by clicking the Download the internal log file Data being downloaded 7 Data log is exported in CSV format and can then be imported and viewed in a suitable program as...

Page 70: ...GD1 Page 70 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 71: ...information Unit serial number If available support reference number Short description of the error or problem A list of all items to be packed in the box Contact information with telephone number and...

Page 72: ...GD1 Page 72 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 73: ...GD1 Page 73 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 74: ...GD1 Page 74 of 76 850 816926 EN R06 THIS PAGE LEFT INTENTIONALLY BLANK...

Page 75: ...GD1 Page 75 of 76 850 816926 EN R06 EU DECLARATION OF CONFORMITY...

Page 76: ...RANCE T l 33 0 3 21 60 80 80 Fax 33 0 3 21 60 80 00 Web site https gasdetection 3M com AMERICAS Tel 1 713 559 9280 Fax 1 281 292 2860 ASIA PACIFIC Tel 86 21 3127 6373 Fax 86 21 3127 6365 EUROPE Tel 33...

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