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Analog i/o configuration – Teledyne GFC-7000E - Trace CO2 Analyzer User Manual

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Model GFC7000E Instruction Manual

Operating Instructions

04584 Rev A1

69

6.9.4. Analog I/O Configuration

The analog I/O functions that are available in the MGFC7000E are:

Table 6-8: DIAG - Analog I/O Functions

Sub Menu

Function

AOUTS CALIBRATED: Shows the status of the analog output calibration (YES/NO) and initiates a

calibration of all analog output channels.

CONC_OUT_1

Sets the basic electronic configuration of the A1 analog output (CO

2

) . There are

three options:
Range: Selects the signal type (voltage or current loop) and full scale level of the
output.
REC_OFS: Allows to set a voltage offset (not available when RANGE is set to
CURRent loop.
Auto_CAL: Performs the same calibration as AOUT CALIBRATED, but on this one
channel only.
NOTE: Any change to RANGE or REC_OFS requires recalibration of this output.

CONC_OUT_2

Same as for CONC_OUT_1 but for analog channel 2 (CO

2

)

TEST OUTPUT

Same as for CONC_OUT_1 but for analog channel 4 (TEST)

AIN CALIBRATED

Shows the calibration status (YES/NO) and initiates a calibration of the analog to

digital converter circuit on the motherboard.

To configure the analyzer’s three analog outputs, set the electronic signal type of each channel

and calibrate the outputs. This consists of:

• Selecting an output type (voltage or current, if an optional current output driver has been

installed) and the signal level that matches the input requirements of the recording device
attached to the channel, see Sections 6.9.4.1.

• Calibrating the output channel. This can be done automatically or manually for each

channel, see Sections 6.9.4.2 and 6.9.4.3.

• Adding a bipolar recorder offset to the signal, if required (Section 6.9.4.2.)

In its standard configuration, the analyzer’s outputs can be set for the following DC voltages. Each
range is usable from -5% to + 5% of the nominal range.

Table 6-9: Analog Output Voltage Ranges

RANGE

MINIMUM OUTPUT

MAXIMUM OUTPUT

0-0.1 V

-5 mV

+105 mV

0-1 V

-0.05 V

+1.05 V

0-5 V

-0.25 V

+5.25 V

0-10 V

-0.5 V

+10.5 V

The default offset for all ranges is 0 VDC.