Teledyne 3000ZA2G - Zirconium oxide analyzer User Manual
Page 33
Trace Oxygen Analyzer
Installation
Teledyne
Analytical
Instruments
21
System
Alarm:
Actuates when DC power supplied to circuits is unacceptable
in one or more parameters. Permanently configured as
failsafe and latching. Cannot be defeated. Actuates if self test
fails.
(Reset by pressing button to remove power to relay. Then
press again and any other button Up and Down
simultaneously to resume.
Further detail can be found in Chapter 4, Section 4.6.
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
VDC (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.)