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Bacharach GDC-350 Operation Manual

Manual is about: Gas Sensor / Monitor

Summary of GDC-350

  • Page 1

    Instruction 5909-9000 operation manual rev. 1 - january 2012 product leadership x training x service x reliability.

  • Page 2

    Gdc-350 operation manual ii 5909-9000 rev 1 disclaimer under no circumstances will bacharach, inc. Be liable for any claims, losses, or damages resulting from or arising out of the repair or modification of this equipment by a party other than bacharach service technicians, or by operation or use of...

  • Page 3

    Gdc-350 operation manual 5909-9000 rev 1 iii important read and understand this manual prior to using this instrument. This instrument should be inspected and calibrated at regular intervals by qualified and trained personnel. For more information refer to the “system maintenance” and “calibration p...

  • Page 4

    Gdc-350 operation manual iv 5909-9000 rev 1 service policy bacharach, inc. Maintains an instrument service facility at the factory. Some bacharach distributors / agents may also have repair facilities, however, bacharach assumes no liability for service performed by anyone other than bacharach perso...

  • Page 5

    Gdc-350 operation manual 5909-9000 rev 1 v table of contents 1. Overview ................................................................................................................ 1 1.1. General description ..........................................................................................

  • Page 7

    Gdc-350 operation manual 5909-9000 rev 1 1 1. Overview 1.1. General description the gdc-350 is an economical, self-contained gas detector for non-hazardous (non- explosion rated) commercial applications. It is available in two basic configurations: single-sensor models and dual-sensor models. The se...

  • Page 8

    Gdc-350 operation manual 2 5909-9000 rev 1 figure 1-2. Water tight gdc-350 components 1.3. Key interior components figure 1-3. Interior components of the gdc-350

  • Page 9

    Gdc-350 operation manual 5909-9000 rev 1 3 1.4. Sensor aging and calibration extending firmware (cef) gdc-350 systems with on-board electrochemical sensors have been programmed with our cef (calibration extending firmware). This firmware takes into consideration the aging of the electrochemical co, ...

  • Page 10

    Gdc-350 operation manual 4 5909-9000 rev 1 figure 2-1. Standard enclosure dimensions figure 2-2. Water-tight enclosure dimensions.

  • Page 11

    Gdc-350 operation manual 5909-9000 rev 1 5 2.2. Sensor specifications categories/subcategories descriptions on-board sensors electrochemical 1 response: response (gas specific) temp range: 0° c to +50° c (operating) repeatability: ±10% of set point life span: 2 to 3 years in air (under normal condit...

  • Page 12

    Gdc-350 operation manual 6 5909-9000 rev 1 2.3. Model designations.

  • Page 13

    Gdc-350 operation manual 5909-9000 rev 1 7.

  • Page 14

    Gdc-350 operation manual 8 5909-9000 rev 1 3. Installation 3.1. Sensor mounting heights gas applications / types suggested mountings carbon monoxide gas engine exhaust 4’ to 6’ from the floor nitric oxide diesel engine exhaust applications nitrogen dioxide sulfur dioxide all 6” from the floor or nea...

  • Page 15

    Gdc-350 operation manual 5909-9000 rev 1 9 3.3. Remote sensor housing for solid-state sensors figure 3-2. Remote sensor housing 3.4. Detailed wiring connections (types a, b, and d) figure 3-3. Wiring connections for gdc-350 types a, b, and d.

  • Page 16

    Gdc-350 operation manual 10 5909-9000 rev 1 3.5. Detailed wiring connections (type e) figure 3-4. Wiring connections for gdc-350 type e 3.6. Wiring the gdc-350 for power drill out one or more of the pvc conduit entry hole plugs located at bottom left or right or top left edge of system enclosure bas...

  • Page 17

    Gdc-350 operation manual 5909-9000 rev 1 11 figure 3-5. Proper wiring examples (continued).

  • Page 18

    Gdc-350 operation manual 12 5909-9000 rev 1 figure 3-6. Improper wiring example 3.7. Wiring remote sensors (voltage and signal) three (3) conductor, 16 to 18 gauge, stranded wire is required between the control panel and the remote solid-state sensor. Under most local electrical codes, low voltage w...

  • Page 19

    Gdc-350 operation manual 5909-9000 rev 1 13 3.9. Installation example 1: type “a” with enclosed transformer figure 3-7. Sample type “a” installation.

  • Page 20

    Gdc-350 operation manual 14 5909-9000 rev 1 3.10. Installation example 2: type “b” with remote solid-state sensor figure 3-8. Sample type “b” installation note: wiring between a gdc-350 and the remote sensor (indicated above) should be 3-conductor, 16 to 18-gauge shielded cable. Observe polarity bec...

  • Page 21

    Gdc-350 operation manual 5909-9000 rev 1 15 3.11. Installation example 3: type “d” with on-board and remote sensors figure 3-9. Sample type “d” installation.

  • Page 22

    Gdc-350 operation manual 16 5909-9000 rev 1 3.12. Installation example 4: type “e” with two on-board sensors figure 3-10. Sample type “e” installation 3.13. Powering on the gdc-350 upon application of power, the green led light indicator(s) will illuminate and the led between ch-1 and ch-2 will be b...

  • Page 23

    Gdc-350 operation manual 5909-9000 rev 1 17 note: reference photo on page 1 for location of leds and test- buttons. In the event of a gas build up beyond the preset low alarm trip point, the “sen-1” led illuminates, the “low” alarm level led illuminates and the low alarm relay de- energizes activati...

  • Page 24

    Gdc-350 operation manual 18 5909-9000 rev 1 to abort this test, press the internal “up” push-button or the exterior silence push- button and everything will reset to normal operating condition. If the gdc-350 is equipped with a digital display, it will indicate “test” during this test period. 4.3. D...

  • Page 25

    Gdc-350 operation manual 5909-9000 rev 1 19 delay function for the audible alarm has timed out. If dip switch 5 is in the “down” position, the audible alarm does not respond at all. The internal audible alarm normally activates with a steady tone when a “high” gas alarm condition exists. The interna...

  • Page 26

    Gdc-350 operation manual 20 5909-9000 rev 1 functions j6 j7 resting (j7 jumpers are disabled) p1 p1 setting span gas value (on-board sensor) p2 p2 perform zero (null) calibration (on-board sensor) p2 p3 perform span calibration (on-board sensor) p2 p4 adjust low gas alarm ascending value (on-board s...

  • Page 27

    Gdc-350 operation manual 5909-9000 rev 1 21 4.5. Adjusting alarm setpoints the gdc-350 is configurable as a single or dual channel detector as such there are two ascending gas alarm set points and two descending gas alarm set points. Almost all installations of the gdc-350 will use the factory defau...

  • Page 28

    Gdc-350 operation manual 22 5909-9000 rev 1 once all alarm settings have been set to desired values, move j7 back to its resting position p1. Then move jumper j6 back to its resting position (p1) on the lower bank. All new values will be written to the eeprom. Refer to the flowchart below. Figure 4-...

  • Page 29

    Gdc-350 operation manual 5909-9000 rev 1 23 therefore, in this example, the required voltage setting to achieve an alarm set point of 100 ppm is 2.0 vdc. Voltage reference table for alarm settings sensor / gas measurement range low alarm set voltage high alarm set voltage co 0-200 ppm 25 ppm / 0.50 ...

  • Page 30

    Gdc-350 operation manual 24 5909-9000 rev 1 volt reading at test points time delay in minutes volt reading at test points time delay in minutes 0 v n/a 0.58 v 2.9 0.02 v 0.1 0.60 v 3.0 0.04 v 0.2 0.62 v 3.1 0.06 v 0.3 0.64 v 3.2 0.08 v 0.4 0.66 v 3.3 0.10 v 0.5 0.68 v 3.4 0.12 v 0.6 0.70 v 3.5 0.14 ...

  • Page 31

    Gdc-350 operation manual 5909-9000 rev 1 25 once all desired time delay settings have been achieved, move the jumper back to position 1 (p1) on jumper j7 and move the jumper back to position 1 (p1) on lower the lower bank (j6). At that point, all new settings will be written to the eeprom. Function ...

  • Page 32

    Gdc-350 operation manual 26 5909-9000 rev 1 4.9. Led digital display the gdc-350 system allows for a limited amount of customization of the optional led digital display using jumpers j3, j4, and j5. X the display can be switched completely off. X the display brightness level can be adjusted to low o...

  • Page 33

    Gdc-350 operation manual 5909-9000 rev 1 27 5. Calibration note: during any calibration procedure, if the instrument sounds with repetitive beeps, the sensor is not settling within tolerance (1% for catalytic and solid-state sensors, 20% for electrochemical sensors). Contact bacharach support for ad...

  • Page 34

    Gdc-350 operation manual 28 5909-9000 rev 1 note: it is recommended that a calibration label should be applied after every calibration to confirm work performed and the date it was confirmed. If a controller is involved, the alarm set points should be indicated on a label on the front door of the en...

  • Page 35

    Gdc-350 operation manual 5909-9000 rev 1 29 note: when calibrating solid-state sensors for combustibles or refrigerants, the span gas must be humidified. The use of a humidification chamber is required. The humidification chamber sits in line between the cylinder of span gas and the calibration adap...

  • Page 36

    Gdc-350 operation manual 30 5909-9000 rev 1 calibrating the span step calibrating the span procedure 1 attach a regulator to a cylinder of span gas. 2 insert the calibration adapter into the sensor opening on the front of the enclosure. Use a slight twisting motion as you gently push the calibration...

  • Page 37

    Gdc-350 operation manual 5909-9000 rev 1 31 calibrating the null (zero) step calibrating the null (zero) procedure 1 attach a regulator to a cylinder of zero air. 2 attach the flow adapter and open the regulator valve fully to allow zero air to flow over sensor. Use a slight twisting motion as you g...

  • Page 38

    Gdc-350 operation manual 32 5909-9000 rev 1 5.7. Calibrating 4-20 ma signal for incoming analog transmitter to perform this function you will need an accurate current source able to generate 4.0 ma and 20.0 ma current signals, or a bacharach gdc-150. Using a current source to calibrate the null (zer...

  • Page 39

    Gdc-350 operation manual 5909-9000 rev 1 33 using a bacharach gdc-150 to calibrate the null (zero) step using a bacharach gdc-150 to calibrate the null (zero) procedure 1 at the gdc-150: for zero calibration on the gdc-150, move the jumper to p2 and set the voltage at tp1 and tp2 for 0 vdc. If trans...

  • Page 40

    Gdc-350 operation manual 34 5909-9000 rev 1 7. Common accessories, options, and replacement parts part number description 5909-0001 led digital display (must be selected when ordering) 5909-0002 water/dust-tight enclosure (nema 4x) 5209-0004 splash guard (nema 4x enclosures only) 5209-0006 calibrati...