RKI Instruments 12 VDC Beacon 200 - Manual (Page 41)

12 VDC Beacon 200 Operator’s Manual • 37
Chapter 7: Maintenance
Overview
This chapter describes use of the Calibration Program and corrective
maintenance procedures for the 12 VDC Beacon 200. It includes a
troubleshooting guide for problems you may encounter with the 12 VDC
Beacon 200. Procedures to replace components of the 12 VDC Beacon
200 are at the end of this chapter.
Calibration Program
The Calibration Program is used to calibrate the 12 VDC Beacon 200’s
active channel(s). Since the 12 VDC Beacon 200 can support both direct
connect (internal amp) and 4-20 mA transmitter (remote amp) detector
heads, when calibrating the active channel(s) there are three possible
detector head combinations:
• Direct connect detector head(s) only.
If one or two direct connect detector heads are active, then all
calibration adjustments are made at the 12 VDC Beacon 200 after
calibration gas is applied at the detector(s).
• 4-20 mA transmitter detector head(s) only.
If one or two 4-20 mA transmitter detector heads are active, then all
calibration adjustments are made at the detector head(s) after
calibration gas is applied to the detector(s).
• A direct connect and a 4-20 mA transmitter detector head.
If one direct connect and one 4-20 mA transmitter detector head are
installed, then calibration adjustments must be made at the 12 VDC
Beacon 200 for the direct connect detector head after applying gas to
its detector, and at the detector head for the 4-20 mA transmitter
detector head.
Calibration Program Flow
Figures 11, 12, and 13 below illustrate the general flow of the Calibration
Program for the three possible detector head combinations. See the next
section, Entering the Calibration Program, for instructions to enter the
Calibration Program. In general, the program screens provide instructions