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Related Manuals for Qel QTS-1710 SERIES
Summary of Contents for Qel QTS-1710 SERIES
- Page 1 MODEL QTS-1710 SERIES COMBUSTIBLE GAS TRANSMITTER/SENSOR INSTALLATION OPERATION AND MAINTENANCE MANUAL QUATROSENSE ENVIRONMENTAL LTD. 5935 OTTAWA STREET, PO BOX 749 RICHMOND, ONTARIO CANADA K0A 2Z0 PHONE: (613) 838-4005 FAX: (613) 838-4018 Web: www.QELsafety.com Email: QEL@QELsafety.com...
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Page 2: Table Of Contents
TABLE OF CONTENTS GENERAL SPECIFICATIONS .......................3 INSTALLATION ............................3 FILTERS AND SENSOR POISONS .......................4 ........................5 OISON ESISTANT ENSORS ................................5 ILTERS CALIBRATION PROCEDURES ......................5 CALIBRATION WITH METHANE STANDARD GAS FOR OTHER COMBUSTIBLE GASES................................6 ..........................7 ONVERSION ORMULAE ............................7 ALIBRATION ASES WIRING ................................7 REMOTE SENSOR HEAD MOUNTING .....................8 ................................8... -
Page 3: General Specifications
QTS-1710 TRANSMITTER/SENSOR 1. GENERAL SPECIFICATIONS Power Supply 24 VDC (12 to 30 VDC) 125 mA Max 80 mA typical Signal 4 - 20 mA Linear 0 - 100% LEL Wiring 3 wires: Power (+) Signal Common (-) Max. Signal Load (Burden resistance) 700 Ohms at 24 VDC 500 Ohms at 20 VDC 200 Ohms at 12 VDC... -
Page 4: Filters And Sensor Poisons
Procedure Remove electronics module for pulling wires and reinstall for connection. Undo the centre nut and disconnect the sensor wire from the jack. Pull outward. Figure 2 Enclosure Access 3. FILTERS AND SENSOR POISONS Catalytic bead sensors such as are used in these instruments are subject to certain poisoning effects from some gases. -
Page 5: Poison Resistant Sensors
IS TO APPLY A TEST GAS. 3.1 Poison Resistant Sensors QEL uses improved catalytic bead sensors, which are very resistant to poison of this sort; however, they are not proof against poisons and should be tested regularly. 3.2 Filters QEL has instituted the use of poison filters of activated charcoal impregnated cloth. These supply good protection against most poisons;... -
Page 6: Calibration With Methane Standard Gas For Other Combustible Gases
"SIG" jack. If Transmitter is connected to a QEL controller, insert Neg probe into "COM" jack to avoid fault condition. Adjust Zero to get 4.00 mA in clean air. Span Adjustments: Multimeter still attached as in (2) apply appropriate calibration gas to sensor and adjust SPAN to read appropriate signal on the multimeter. -
Page 7: Conversion Formulae
5.1 Conversion Formulae: C = %LEL of Methane Test Gas R = Equivalent % LEL of Target Gas S = Signal in milliamps J = number from the table above S = 4 + 16 x R mA e.g. Calibration for propane using 2.46 % Methane Test Gas 2.46 % Methane = 49.2 % LEL Methane R = 1.67 x 49.2 = 82.2 %LEL Propane S = 4 + 16 x 82.2 = 17.15 mA signal... -
Page 8: Remote Sensor Head Mounting
7.2 Calibration For calibration QEL sells an adapter to connect a 1/4” o.d. tubing to the sensor for remote application of gas. Note that gas flow should be higher than normal especially if the sensor head is in an area of moving air. Calibration gas flows of up to 1 liter/minute are standard. -
Page 9: Warranty Statement
QEL shall not be responsible for any liability arising from auxiliary interfaced equipment nor any damage resulting from the installation or operation of this equipment. QEL’s total liability is contained as above with no other liability expressed or implied as the purchaser is entirely responsible for installation and maintenance of systems.