Teledyne 3000PAEU - General purpose percent oxygen analyzer - Manual (Page 29)

Percent Oxygen Analyzer Installation 3
3-7 Teledyne Analytical Instruments
configured as failsafe and latching. Cannot be de-
feated. Actuates if self test fails.
(Reset by pressing button to remove power. Then
press again and any other button EXCEPT Sys-
tem to resume.
Further detail can be found in chapter 4, section 4-5.
Table 3-2: Alarm Relay Contact Pins
Pin Contact
45 Threshold Alarm 1, normally closed contact
28 Threshold Alarm 1, moving contact
46 Threshold Alarm 1, normally open contact
42 Threshold Alarm 2, normally closed contact
44 Threshold Alarm 2, moving contact
43 Threshold Alarm 2, normally open contact
36 System Alarm, normally closed contact
20 System Alarm, moving contact
37 System Alarm, normally open contact
Digital Remote Cal Inputs: Accept 0 V (off) or 24 V dc (on) inputs
for remote control of calibration. (See Remote Calibration Protocol below.)
See Table 3-3 for pin connections.
Zero: Floating input. 5 to 24 V input across the + and – pins puts
the analyzer into the
Zero mode. Either side may be
grounded at the source of the signal. 0 to 1 volt across the
terminals allows
Zero mode to terminate when done. A
synchronous signal must open and close the external zero
valve appropriately. See Remote Probe Connector. (The –C
option internal valves operate automatically.)
Span: Floating input. 5 to 24 V input across the + and – pins puts
the analyzer into the
Span mode. Either side may be
grounded at the source of the signal. 0 to 1 volt across the
terminals allows
Span mode to terminate when done. A
synchronous signal must open and close external span valve
appropriately. See Figure 3-5 Remote Probe Connector. (The
–C option internal valves operate automatically.)
Cal Contact: This relay contact is closed while analyzer is spanning
and/or zeroing. (See Remote Calibration Protocol below.)