RKI Instruments GD-K77D - Manual (Page 24)

19 • Operation Model GD-K77D Operator’s Manual
Operation
Start-up Preparations
To avoid the possibility of electrical shock or damage to the Model GD-K77D, follow the
precautions listed below before turning on the unit:
• Make sure the Model GD-K77D has been properly grounded.
• Check all wiring connections to external devices.
• Make sure the power voltage is within specification (DC-24V +/- 10%, Terminal
Voltage).
• Check the wiring connections to any external alarms.
• Make sure the correct dust filter has been properly installed.
CAUTION: Because dust filters are designed for specific target gases, it is very important to
check whether the correct dust filter has been installed on the Model GD-K77D.
• Check whether the Model GD-K77D’s fuse has the correct current and voltage.
Basic Operation Flow and Operating Modes
The diagram below shows the basic operation flow of the Model GD-K77D. There are
three basic operating modes:
• Detection Mode (Normal operation)
• Alarm Test Mode
• Maintenance Mode
Figure 9: Operation Flow Chart
Start-up preparation
Power on
Initial clear (about 25 seconds)
Detection mode
Maintenance Mode 1 & 2
Alarm test mode
Test/set switch (press for about 3 seconds)
Mode, press for about 3 seconds