GDS GDS-68XP, Operation And Maintenance Manual, Page: 27 / 68

GDS-68XP Operation & Maintenance Manual, Revision 3.5
Page 27
GDS ‐ 68XP STARTUP PROCEDURE
Before start up, review Chapter 4 (“Operation”) for information on operating modes and indications as
well as Chapter 6 (“Sequencer Controls and Indicators”). Figure 6 ‐ 3 provides a handy reference to the red
and green LEDs (“L1” and “L2”) that indicate the current status of the sequencer processor.
ITEM NOTES
1 MAKE SURE SAMPLE OUTLET IS CONNECTED
CLOSE INLET AND FILTER DRAIN VALVES
SAMPLE GAS CAN BE DEADLY. ALWAYS MAKE
SURE SAMPLE OUTLET IS DIRECTED TO A SAFE
AREA
2 SET SEQUENCE SWITCH TO “4” SET FOR 4 HOUR SAMPLE
3 APPLY 24VDC POWER L1, L2 FLASH
GASMAX DISPLAY ACTIVE
PUMP ON, PURGE AIR FLOWING
GDS ‐ 68XP WARMUP:
SENSOR STABLE + 15 MINUTES
DURING WARMUP, PERFORM STEPS 4 ‐ 5 ‐ 6 BELOW
4
ADJUST FLOW METER VALVE FOR 0.5 LPM ADJUST FOR ½ LPM PURGE AIR FLOW
5 CHECK TIME OF DAY CLOCK FOR TIMEZONE;
SET HOST NAME AND MEASUREMENT NAME;
SET ETHERNET NETWORK PARAMETERS
CHANGES TO NETWORK SETTINGS ARE NOT
RECOGNIZED UNTIL NEXT POWER ‐ UP
SEQUENCE. RETURN TO STEP 3 IF CHANGED
6
OPTIONAL: VERIFY 4 ‐ 20MA SIGNAL TO REMOTE
DCS OR PLC
USE DIAGNOSTICS MENU TO FORCE CHANNEL 2
OUTPUT TO 4MA / 20MA AND VERIFY READING
ON RECEIVING DEVICE
GDS ‐ 68XP COMPLETES FIRST SEQUENCE AND ENTERS PURGE / HOLD MODE:
OUTPUT = “FLOW FAULT”, L2 (GREEN) FLASHING
7
OPEN SAMPLE INLET VALVE VERIFY PRESSURE ON PRESSURE GAUGE
8
PRESS “BYPASS” AND ADJUST REGULATOR FOR
0.5 LPM SAMPLE GAS FLOW
DO NOT RE ‐ ADJUST FLOW METER VALVE
RAW SENSOR OUTPUT SHOULD INCREASE IF
TARGET GAS PRESENT
9 PRESS “RUN” TO EXIT BYPASS CLOSES SAMPLE VALVE AND RETURNS
SEQUENCER TO PURGE/HOLD MODE
GDS ‐ 68XP COMPLETES PURGE / HOLD
GDS ‐ 68XP WILL RUN NEW SAMPLE SEQUENCES APPROXIMATELY EVERY FOUR HOURS
ALLOW NEW UNIT TO RUN SEVERAL SEQUENCES BEFORE PROCEEDING
10
PERFORM SENSOR CALIBRATION SEE CHAPTER 7
GDS ‐ 68XP INSTALLATION COMPLETE