Trace Oxygen Analyzer Installation
Teledyne Analytical Instruments 19
Fuse Installation: The fuse block, at the right of the power cord
receptacle, accepts US or European size fuses. A jumper replaces the
fuse in whichever fuse receptacle is not used. Fuses are not installed at
the factory. Be sure to install the proper fuse as part of installation. (See
Fuse Replacement in Chapter 5, Maintenance.)
3.3.2.2 50-PIN EQUIPMENT INTERFACE CONNECTOR
Figure 3-4 shows the pin layout of the Equipment Interface
Connector. The arrangement is shown as seen when the viewer faces the
rear panel of the analyzer. The pin numbers for each input/output function
are given where each function is described in the paragraphs below.
Figure 3-4: Equipment Interface Connector Pin Arrangement
Analog Outputs: There are four DC output signal pins—two pins per
output. For polarity, see Table 3-1. The outputs are:
• 0–1 VDC % of Range:Voltage rises linearly with
increasing oxygen, from 0 V at 0
ppm to 1 V at full scale ppm. (Full
scale = 100% of programmable
range.)
• 0–1 VDC Range ID: 0.25 V = Low Range, 0.5 V =
Medium Range, 0.75 V = High
Range.
• 4–20 mA DC % Range: Current increases linearly with
increasing oxygen, from 4 mA at 0
ppm to 20 mA at full scale ppm.
(Full scale = 100% of
programmable range)
• (optional) 4–20 mA DC Range ID: 8 mA = Low Range
12 mA = Medium Range
16 mA = High Range