Teledyne 3000PA operating instructions Command Description

3 Installation Model 3000PA

Note: The Remote Probe connector (paragraph 3.3.3) provides signals to ensure that the zero and span gas valves will be controlled synchronously. If you have the –C Internal valve option—which includes additional zero and span gas inputs— the 3000P automatically regulates the zero, span and sample gas flow.

Range ID Relays: Four dedicated Range ID relay contacts. The first three ranges are assigned to relays in ascending order—Low range is as- signed to Range 1 ID, Medium range is assigned to Range 2 ID, and High range is assigned to Range 3 ID. The fourth range is reserved for the Air Cal Range (25%).

Network I/O: A serial digital input/output for local network protocol. At this printing, this port is not yet functional.

RS-232 Port: The digital signal output is a standard RS-232 serial

communications port used to connect the analyzer to a computer, terminal, or other digital device. It requires a standard 9-pin D connector.

The data is status information, in digital form, updated every two seconds. Status is reported in the following order:

•The concentration in percent

•The range in use (HI, MED, LO)

•The span of the range (0-10 %, etc)

•Which alarms—if any—are disabled (AL–x DISABLED)

•Which alarms—if any—are tripped (AL–x ON).

Each status output is followed by a carriage return and line feed.

Four input functions using RS-232 have been implemented to date. They are described in Table 3-1.

	Table 3-1: Commands via RS-232 Input
Command	Description
as<enter>	Immediately starts an autospan.
az<enter>	Immediately starts an autozero.
co<enter>	Reports "Raw Cell Output" (current output of the sensor
	itself) in ∝ A. For example—
	Raw Cell Output: 99 µ A.

3-8 Teledyne Analytical Instruments