Teledyne 3000PA-EU Operating Instructions Manual page 29

Percent Oxygen Analyzer
Further detail can be found in chapter 4, section 4-5.
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:
Span:
Cal Contact: This relay contact is closed while analyzer is spanning
and/or zeroing. (See Remote Calibration Protocol below.)
configured as failsafe and latching. Cannot be de-
feated. Actuates if self test fails.
(Reset by pressing
again and any other button EXCEPT Sys-
press
tem to resume.
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
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.)
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.)
Teledyne Analytical Instruments
Installation 3
button to remove power. Then
3-7