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Bacharach GDC-150 Operation Manual

Manual is about: Gas Sensor/Transmitter

Summary of GDC-150

  • Page 1

    Instruction 5209-9000 operation manual rev. 0 - may 2011 product leadership • training • service • reliability.

  • Page 2

    Gdc-150 operation manual ii 5209-9000 rev 0 important note read and understand this manual prior to using this instrument. This instrument should be inspected and programmed by qualified and trained personnel. This instrument has not been designed to be intrinsically safe in hazardous or explosion-r...

  • Page 3

    Gdc-150 operation manual 5209-9000 rev 0 iii 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, inc. Or its authorized service representative...

  • Page 4

    Gdc-150 operation manual iv 5209-9000 rev 0 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-150 operation manual 5209-9000 rev 0 v revisions bacharach, inc. Makes no warranty or representation, expressed or implied including any warranty of merchantability or fitness for purpose, with respect to this manual. All information contained in this manual is believed to be true and accurate a...

  • Page 6

    Gdc-150 operation manual vi 5209-9000 rev 0 table of contents 1. Overview ................................................................................................................ 1 1.1. General description .........................................................................................

  • Page 7

    Gdc-150 operation manual 5209-9000 rev 0 1 1. Overview 1.1. General description gdc-150 transmitters are rugged, user-friendly, configurable analog transmitter gas detectors for use in non-hazardous (non-explosion rated) environments for commercial hvac and light industrial use. It can be configured...

  • Page 8

    Gdc-150 operation manual 2 5209-9000 rev 0 figure 1-2. Optional water-tight (nema 4x) enclosure figure 1-3. Water-tight enclosure (side view) showing optional splash guard note: gdc-150 transmitters utilizing catalytic combustible or electrochemical h 2 s/so 2 sensors are supplied with the water- an...

  • Page 9

    Gdc-150 operation manual 5209-9000 rev 0 3 1.3. Key components figure 1-4. Key components on gdc-150 circuit board.

  • Page 10

    Gdc-150 operation manual 4 5209-9000 rev 0 2. Specifications 2.1. General all sensor types power 12 vac to 30 vac or 16 vdc to 30 vdc 1 current 80 to 120 ma 2 indicators one bi-color led: • green = power • red = alarm • flash green = warm-up • flash red = fail one amber led (internal relay coil stat...

  • Page 11

    Gdc-150 operation manual 5209-9000 rev 0 5 2.4. Sensors (solid-state and catalytic) solid-state catalytic type solid-state mos 4 catalytic pellistor range combustible: 0-50% lel refrigerant: 0-2000 ppm 0-100% lel of target combustible gas or vapor life span combustible: approximately 5 to 8 years in...

  • Page 12

    Gdc-150 operation manual 6 5209-9000 rev 0 2.5. Sensors (electrochemical) sensor range life span 5 reso- lution temp rh 6 response time (t 90 ) warm up ammonia (nh 3 ) 0-500 ppm 2 1-2 ppm -40 to +50°c 7 15-90% 2-6 hrs carbon monoxide (co) 0-200 ppm 5-8 1 ppm, 3 ppm 8 -20 to +50°c 10-95% 1 hr 9 hydro...

  • Page 13

    Gdc-150 operation manual 5209-9000 rev 0 7 2.6. Sensor cross sensitivity (electrochemical) sensor cross sensitivity – electrochemical sensors only ammonia 0-500 ppm 300 ppm co = 8 10% vol co 2 = -15 35 ppm no = 6 15 ppm h 2 s = 30 1 ppm cl 2 = -1 5 ppm hcl = -3 5 ppm so 2 = -0.5 200 ppm h 2 = 4 5 pp...

  • Page 14

    Gdc-150 operation manual 8 5209-9000 rev 0 3. Installation 3.1. Mounting holes and conduit ports the gdc-150 should be installed on a flat vertical surface with the sensor pointing outwards in a clean, dry environment. If the gdc-150 is to be installed in a potentially wet environment, the optional ...

  • Page 15

    Gdc-150 operation manual 5209-9000 rev 0 9 figure 3-2. Water-tight enclosure showing mounting holes warning: do not drill holes in the back of the base of the enclosure for the purpose of mounting the sensor/transmitter. Leak paths can occur. Corrosion damage will not be covered under warranty. Note...

  • Page 16

    Gdc-150 operation manual 10 5209-9000 rev 0 after installation, simply locate the lid hinges over the installed base hinges and pull toward you. The hinges should easily “snap” back into place. By design, the overlapping door of the pvc enclosure makes it inherently drip proof, although it is not wa...

  • Page 17

    Gdc-150 operation manual 5209-9000 rev 0 11 figure 3-3. Power and optional relay wiring note: the main wiring terminal strip on the gdc-150 circuit board can be unplugged for easier wiring installation. Grasp the two sides of the terminal strip and lift upward with a slight side to side rocking moti...

  • Page 18

    Gdc-150 operation manual 12 5209-9000 rev 0 figure 3-4. Proper wiring examples.

  • Page 19

    Gdc-150 operation manual 5209-9000 rev 0 13 figure 3-4. Proper wiring examples (continued) figure 3-5. Improper wiring example 4. Operation 4.1. General after installation, double check wiring prior to applying power to the gdc-150 transmitter. Remember, these are low voltage devices. After power up...

  • Page 20

    Gdc-150 operation manual 14 5209-9000 rev 0 4.2. Detecting gas upon detection of the presence of target gas, the signal output increases to a value equal to the amount of gas being detected by the sensor. If the led display option has been supplied, this value will be displayed. If the concentration...

  • Page 21

    Gdc-150 operation manual 5209-9000 rev 0 15 4.5. Open loop diagnostic the gdc-150 circuit board has been fitted with a red led located near the bottom center of the circuit board. This is an “open loop” indicator and has been designed as a quick trouble shooting device. If the 4-20 ma signal loop ha...

  • Page 22

    Gdc-150 operation manual 16 5209-9000 rev 0 figure 4-2. Calculating the alarm set point 4.7.2. Adjusting the alarm set point step description 1. Move the jumper to position p5. The green outer led will flash once within 2 seconds for confirmation. The system is now waiting for the user to set the de...

  • Page 23

    Gdc-150 operation manual 5209-9000 rev 0 17 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 24

    Gdc-150 operation manual 18 5209-9000 rev 0 5.5. Calculating the span gas value to achieve calibration the user must first tell the gdc-150 what concentration of span he is going to flow over the sensor. Within the transmitter, this is a voltage setting. The range of 0-4 vdc is equal to the full mea...

  • Page 25

    Gdc-150 operation manual 5209-9000 rev 0 19 5.6. Setting the span gas value step setting the span gas value procedure 1 move the jumper to position p2 (see figure 4-1 on page 15). The green outer led flashes once for confirmation. The system is now waiting for the user to set the desired value. 2 at...

  • Page 26

    Gdc-150 operation manual 20 5209-9000 rev 0 important: if the user attempts to null adjust the sensor without applying zero air and the sensor detects background gas the amber led flashes to advise the user that it is out of tolerance. 5.8. Calibrating the span value step calibrating the span value ...

  • Page 27

    Gdc-150 operation manual 5209-9000 rev 0 21 6. Accessories and replacement parts 6.1. Metal protective guards gdc-150 series analog transmitters are all supplied in very rugged, non-metallic enclosures. However, in some applications more protection may be desired. Bacharach can provide protective gu...

  • Page 28

    Gdc-150 operation manual 22 5209-9000 rev 0 world headquarters 621 hunt valley circle, new kensington, pennsylvania 15068 phone: 724-334-5000 • toll free: 1-800-736-4666 • fax: 724-334-5001 website: www.Mybacharach.Com • e-mail: help@mybacharach.Com.