Teledyne gfc 7000ta operation manual Manual Analog Output Calibration and Voltage Adjustment, Vdc

Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

To select manual output calibration for a particular channel, activate the ANALOG I/O CONFIGURATION MENU (See Section 6.13.1), then press:

Exit to return to

the main

sample display

DIAG	ANALOG I / O CONFIGURATION
PREV NEXT	ENTR EXIT
DIAG AIO	AOUTS CALIBRATED: NO
< SET SET>	CAL	EXIT
Press SET> to select the analog output channel to
be configured. Then press EDIT to continue
DIAG AIO	CONC_OUT_2:5V, CAL
< SET SET>	EDIT	EXIT
DIAG AIO	CONC_OUT_2 RANGE: 5V
SET>	EDIT	EXIT

DIAG AIO	CONC_OUT_2 REC OFS: 0 mV
< SET SET>	EDIT	EXIT
DIAG AIO CONC_OUT_2 AUTO CAL: ON
< SET SET>	EDIT	EXIT
DIAG AIO	CONC_OUT_2 AUTO CAL: ON
ON	ENTR	EXIT
Toggles the	ENTR accepts the new setting
auto cal mode	and returns to the previous
ON/ OFF for	menu. EXIT ignores the new

this analog	setting and returns to the
output channel
	previous menu.
only.

Now the analog output channels should either be automatically calibrated or they should be set to manual calibration, which is described next.

6.13.4.3. Manual Analog Output Calibration and Voltage Adjustment

For highest accuracy, the voltages of the analog outputs can be manually calibrated. Calibration is done through the instrument software with a voltmeter connected across the output terminals (Figure 6-15). Adjustments are made using the touchscreen buttons by setting the zero-point first and then the span- point (Table 6-20).

The software allows this adjustment to be made in 100, 10 or 1 count increments.

Table 6-20: Voltage Tolerances for Analog Output Calibration

Full Scale	Zero Tolerance	Span Voltage	Span Tolerance
0.1 VDC	±0.0005V	90 mV	±0.001V
1 VDC	±0.001V	900 mV	±0.001V
5 VDC	±0.002V	4500 mV	±0.003V
10 VDC	±0.004V	4500 mV	±0.006V

NOTE

Outputs configured for 0.1V full scale should always be calibrated manually

Teledyne Analytical Instruments 129