Teledyne 6600 manual 2-6:Part, Installation, Model, Digital Remote Cal Inputs

2 Installation Model 6600

Threshold Alarm 2:	• Can be configured as high (actuates when concen-
	tration is above threshold), or low (actuates when
	concentration is below threshold).
	• Can be configured as fail-safe or non-fail-safe.
	• Can be configured as latching or nonlatching.
	• Can be configured out (defeated).
System Alarm:	Actuates when DC power supplied to circuits is
	unacceptable in one or more parameters. Permanently
	configured as fail-safe and latching. Cannot be de-
	feated. Actuates if self test fails.
	To reset a System Alarm during installation, discon-
	nect power to the instrument and then reconnect it
	Further detail can be found in chapter 3, section 3-5.

Digital Remote Cal Inputs

Remote Zero and Span Inputs: The REMOTE SPAN and RE- MOTE ZERO inputs are on the DIGITAL INPUT terminal block. They accept 0 V (OFF) or 24 V dc (ON) for remote control of calibration (See Remote Calibration Protocol below.)

Zero:	Floating input. 5 to 24 V input across the + and – terminals
	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 at end of
	section 3.3. (With the -C option, the internal valves automati-
	cally operate synchronously).
Span:	Floating input. 5 to 24 V input across the + and – terminals
	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 the external span
	valve appropriately. See Remote Probe Connector at end of
	section 3.3. (With the -C option, the internal valves automati-
	cally operate synchronously.)

Cal Contact: This relay contact is closed while analyzer is spanning and/or zeroing. (See Remote Calibration Protocol below.)

2-6: Part I Teledyne Analytical Instruments