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Bacharach HGM300 Technical Maintenance Manual

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Download this manual See also: Operation & Installation Manual, Installation Manual
HGM300/RDM800 PREVENTATIVE MAINTENANCE AND TECHNICAL SUPPORT
SECTION 1 – HGM300 CPU reset, RDM800 CPU reset, WARM UP notes and HGM300 Self
Test
SECTION 2 - HGM300/RDM800 Mechanical Room layout
SECTION 3 – HGM300 Relay Connector
SECTION 4 – Flow check procedure
SECTION 5 – Clipping fault adjustment
SECTION 6 – Dual loop 4-20 mA dc scrolling output
SECTION 7 – HGM300 voltage check Dual loop 4-20 mA dc scrolling output
SECTION 8 – Alarm silencing
SECTION 9 - NDIR Sensor
SECTION 10 – Gas verification test procedures
A- Procedure with RDM800
B- Procedure with PC software
SECTION 11 – Password protection
SECTION 12 – Whom to call - Warranty
Rev 3/2/09
1

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Summary of Contents for Bacharach HGM300

  • Page 1 HGM300/RDM800 PREVENTATIVE MAINTENANCE AND TECHNICAL SUPPORT SECTION 1 – HGM300 CPU reset, RDM800 CPU reset, WARM UP notes and HGM300 Self Test SECTION 2 - HGM300/RDM800 Mechanical Room layout SECTION 3 – HGM300 Relay Connector SECTION 4 – Flow check procedure SECTION 5 –...
  • Page 2 There will be 5 beeps (beep/beep – beep/beep – beep). Release the left button. The monitor will now be reset A second way to reset the HGM300 CPU is to turn off power, press and hold the left hand reset button and re-apply power – 5 beeps and release button.
  • Page 3 (4 mA to 12 mA to 20 mA - Red light flashing). The Red light will flash during the 4-20mA test, then all lights will go out, and both the HGM300 and RDM800 will return to “power on” green only.
  • Page 4 SECTION 2 HGM300/RDM800 Refrigerant Gas leak monitor mechanical room placement Exhaust Fan Sample Inlet Pickup Point Machine Room Chiller Rev 3/2/09 Outside Hallway Aux. Horn/Strobe Remote Alarm RDM800 Remote Display Module HGM300 Halogen Gas Monitor Sample Inlet Pickup Points...
  • Page 5 SECTION 3 HGM300 Relay Connector Alarm Alarm Relay Strobe Aux. Power Jumper the ‘Neutral’ of the auxiliary power connector to the ‘Common’ on the relay block. Connect one end of strobe or horn to the ‘NO’ of whichever level of alarm is appropriate for application.
  • Page 6 SECTION 4 NO FLOW CHECK PROCEDURE NO FLOW ZONE Check for air sample tube blockage. NO FLOW PURGE Check for blockage of purge line. Verify that the purge line does not exceed 100’ in length. NO FLOW ZONE AND NO FLOW PURGE Check the water trap. If full of water, drain and re-secure the petcock.
  • Page 7 ADDITIONAL NOTES ON “NO FLOW” PROBLEMS (THE FLOW RATE OF THE PUMP IS 2L/MIN) A DIFFERENCE OF LESS THEN 0.1 PSIA BETWEEN AMBIENT AND PRESSURE WILL CAUSE A “N0 FLOW” FAULT. A VACUUM OF 0.7 PSIA OR LESS BELOW PRESSURE WILL CAUSE A “N0 FLOW” FAULT. TO OBSERVE PRESSURE READINGS ON THE DIAGNOSTIC SCREEN ZONE BY ZONE, YOU MUST PUT A ZONE INTO”ZONE HOLD”...
  • Page 8 NO FLOW PROBLEMS 1) – Pinch off the tubing between the water trap and internal filter. Go to the diagnostic screen on the RDM800. Observe the “PRES”, “VAC” AND “AMB” readings at the bottom of the screen. b) – If the pressure does not drop to normal vacuum levels (about 2 PSIA below pressure reading) the problem is in one of the following;...
  • Page 9 HOW TO FORCE TAKING NEW PRESSURE READINGS FROM THE SYSTEM SCREEN SELECT THE HGM300 THAT NEEDS A NEW PRESSURE READING AND PRESS THE BUTTON TO THE LEFT OF THAT HGM300. THIS WILL TAKE YOU TO THE HGM SETUP SCREEN. ON THE BOTTOM RIGHT SIDE OF THIS SCREEN PRESS THE BUTTON TO THE RIGHT OF “SERVICE MODE ENTRY”...
  • Page 10 If the clipping fault remains, the reference voltage must be verified and corrected if needed. Locate TP1 (+) and TP2 (-) on the HGM300 main PC board (they are found to the left of R-33 the reference adjust potentiometer).
  • Page 11 16 mA by the maximum desired value; example: 16mA/500 ppm = 0.0320 which would be entered as the new “LOOP2 FACTOR”. PLEASE NOTE: THERE IS ONLY 1 LOOP FACTOR FOR ALL SAMPLING ZONES IN THE HGM300 MONITOR; I.E. ADJUSTING ONE SAMPLING ZONE OUTPUT CHANGES ALL SAMPLING ZONE OUTPUTS! These output loops scroll together.
  • Page 12 NEG - Disconnect the top jumper from the power supply to the main PC board. If the top led is now on the problem is in the HGM300 main PC board. 2 RED LEDS POWER SUPPLY INDICATORS TOP +15 VDC...
  • Page 13 WILL KEEP GOING OFF UNTIL THE LEAK IS FIXED! Return to either the System screen or the Zone screen after acknowledging the Rev 3/2/09 HOW TO: SILENCE ALARMS on the HGM300 STEP #1: Start at this screen, the “SYSTEM SCREEN”. STEP #2: PRESS THIS BUTTON, which will take you to the “ALARM SUMMARY SCREEN”.
  • Page 14 What specifically makes the HGM300 Single-Beam-Single-Wavelength NDIR measuring bench so different? 1.) We gold plate the inside of the sampling tube. Gold is virtually untarnishable so this improves the reflecting properties of the optical path, which improves overall measurement bench sensitivity and accuracy.
  • Page 15 5.) Auto zeroing or purging has other benefits. We discussed how it’s used to provide a zero base for comparison to the sample measurement. This, also, allows us to monitor and compensate for changes in I-R drive circuitry, source, bench, detector, and other electronic components. Again this all adds to long-term reliability and accuracy.

  • Page 16: Materials Used

    RDM 800 PROCEDURE 1. If HGM300 and RDM800 are connected, operating, and communicating skip to step 3. Verify on initial power up HGM300 and RDM 800 communicates. To verify this look in the upper left corner of the display on RDM 800. Initially unit will display the message “CHECK NODE”.
  • Page 17 9. Connect the tubing from Reference Gas regulator to Zone 1 on the manifold of HGM 300. Note: The Fault light on HGM300 may illuminate until gas starts to flow from the reference bottle to unit. The pressure should be below the original reading (if reading does not drop the unit may be in the purge cycle.
  • Page 18 8. Select “Diagnostic Menu”, and then choose “Sensors” from the menu item list. This will display all of the diagnostic data for the HGM300. Verify that the unit is not in a purge cycle and take the pressure reading, write down reading.
  • Page 19 9. Connect the tubing from the reference Gas regulator to Zone 1on the manifold of HGM300. NOTE: Fault light on HGM300 may illuminate until gas starts to flow from the reference bottle. Press the enter key from keyboard the sensor readings will update indicated by a beep sound from the HGM300.
  • Page 20 SECTION 11 TO ENTER A SYSTEM PASSWORD PROTECTED OR CHANGE A PASSWORD 1) The system must be up and communicating. 2) Press the button to the left of “HGM# 1”. 3) When the “PASSWORD” screen appears enter “313” as the password. 4) From the System Screen, go to the RDM SET UP Screen.

  • Page 21: Shipping Address

    WARRANTY HIGHLIGHTS PLEASE REVIEW COMPLETE WARRANTY CONDITIONS. PARTS: 2 YEARS AFTER SHIPMENT FROM FACTORY UNLESS OTHERWISE NEGOTIATED. DRILLING INTO THE TOP OF THE HGM300 OR RDM800 CASE VOIDS WARRANTY. ANY WATER FOUND IN THE INFRARED DETECTING BENCH VOIDS WARRANTY. ANY OBVIOUS DAMAGE VOIDS WARRANTY.

This manual is also suitable for:

Rdm800