Model GD-K77D4X-XX Supplement to the GD-K77D Operator’s Manual Part Number: 71-0217RK Revision: 0 Released: 3/1/11 www.rkiinstruments.
WARNING Read and understand this instruction manual before operating detector. Improper use of the detector could result in bodily harm or death. Periodic calibration and maintenance of the detector is essential for proper operation and correct readings. Please calibrate and maintain this detector regularly! Frequency of calibration depends upon the type of use you have and the sensor types.
Product Warranty RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials, workmanship, and performance for a period of one year* from the date of shipment from RKI Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge. Parts must be returned to RKI Instruments, Inc. for repair or replacement.
Overview This supplement describes the differences and additional features of the GD-K77D4X-XX compared to the GD-K77D. It also describes how to install, startup, maintain, and calibrate the GD-K77D4X-XX. See the GD-K77D Operator’s Manual for information specific to the GD-K77D. Specifications Table 1 lists specifications for the GD-K77D4X-XX. Table 1: Specifications Target Gas & Detector Range Refer to the RKI Instruments Inc.
Description This section describes the components of the GD-K77D4X-XX. It consists of the enclosure and a GD-K77D mounted inside. The “XX” at the end of the part number represents characters that denote the target gas and changes depending on the target gas. For example, the part number for a detector head for chlorine (Cl2) detection is GD-K77D4XCL2. Consult RKI Instruments, Inc. for a complete list of available part numbers.
Inlet Fitting Tubing Stub A short tubing stub comes factory installed in the inlet fitting. It is used for connecting the hydrophobic filter. If the hydrophobic filter is not used, or if you install the hydrophobic filter in a different location, the tubing stub needs to be removed and replaced with tubing. Do not pull the tubing stub downward to remove it. Instead, unscrew the lower inlet fitting nut from the fitting body. The tubing stub should come out with the nut.
• Select a site that is easily accessible for servicing. • Select a site where the GD-K77D4X-XX is not likely to be bumped or disturbed. Make sure there is sufficient room to make wiring and sample line connections at the bottom of the GD-K77D4X-XX. Also make sure there is sufficient room to perform start-up, maintenance, and calibration procedures. • Select a site near the sampling area.
sample area. Be sure to keep the length to a minimum. Consult RKI Instruments, Inc. for lengths of more than 20 feet. CAUTION: Avoid loops or slumps in the incoming sample line. To reduce response time, keep the incoming sample line as short as possible. 3. Install 1/4’’ O.D. x 1/8” I.D. Teflon PTFE sample tubing to the gas out fitting. Route the opposite end of the tubing to an open area where the sample can safely disperse or to an exhaust duct.
CAUTION: Leave the cable shield’s drain wire insulated and disconnected at the GD-K77D4X-XX. You will connect the opposite end of the cable shield’s drain wire at the controller. CAUTION: At the controller, do not route power and GD-K77D wiring through the same conduit hub. The power cable may disrupt the transmission of the GD-K77D’s signal to the controller. Start Up 1. Turn on power to the controller. 2. Turn on the controller. 3. Turn on the GD-K77D.
