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Remote operation using the external serial i/o – Teledyne GFC-7000E - Trace CO2 Analyzer User Manual

Page 128

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Model GFC7000E Instruction Manual

Operating Instructions

04584 Rev A1

117

There are two methods to activate control inputs. The internal +5V available from the “+” pin is
the most convenient method (Figure 6.11). However, to ensure that these inputs are truly

isolated, a separate, external 5 VDC power supply should be used (Figure 6.11).

CONTROL IN

A B C D E F U +

S
P

A

N

Z
E

R

O

CONTROL IN

A B C D E F U +

-

+

5 VDC Power

Supply

S

P
A

N

Z

E

R

O

Local Power Connections

External Power Connections

Figure 6-11: Control Inputs

6.13.2. Remote Operation Using the External Serial I/O

6.13.2.1. Terminal Operating Modes

The Model GFC7000E can be remotely configured, calibrated or queried for stored data through

the serial ports. As terminals and computers use different communication schemes, the analyzer
supports two communicate modes specifically designed to interface with these two types of
devices.

Computer mode is used when the analyzer is connected to a computer with a dedicated

interface program such as APICOM. More information regarding APICOM can be found in

later in this section or on the Teledyne Instruments website at http://www.teledyne-
api.com/software/apicom/.

Interactive mode is used with a terminal emulation programs such as HyperTerminal or a

“dumb” computer terminal. The commands that are used to operate the analyzer in this

mode are listed in Table 6-26.