Teledyne GFC-7000T - Trace CO2 Analyzer - manual - Manual (Page 151)

Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 133
DIAG AIO CONC_OUT_2 SPAN: 10000 mV
U100 UP10 UP DOWN DN10 D100 ENTR EXIT
DIAG AIO AUTO CALIBRATING CONC_OUT_2
DIAG AIO AIN CALIBRATED: NO
SET> EDIT EXIT
DIAG ANALOG I / O CONFIGURATION
PREV NEXT ENTR EXIT
FROM ANALOG I/O CONFIGURATION MENU
DIAG AIO CONC_OUT_2 RANGE: CURR
SET> EDIT EXIT
DIAG AIO CONC_OUT_2 CALIBRATED: NO
< SET CAL EXIT
DIAG AIO CONC_OUT_2:CURR, NO CAL
< SET SET> EDIT EXIT
Press SET> to select the analog output channel
to be configured:.
Increase or decrease the current
output by 100, 10 or 1 counts.
The resulting change in output
voltage is displayed in the upper
line.
Continue adjustments until the
correct current is measured with
the current meter.
DIAG AIO CONC_OUT_2 ZERO: 27 mV
U100 UP10 UP DOWN DN10 D100 ENTR EXIT
EXIT ignores the
new setting, ENTR
accepts the new
setting.
DIAG AIO CONC_OUT_2 CALIBRATED: YES
< SET CAL EXIT
DIAG AIO CONC_OUT_2 ZERO: 9731 mV
U100 UP10 UP DOWN DN10 D100 ENTR EXIT
DIAG AIO CONC_OUT_2 CURR-Z: 0 mV
U100 UP10 UP DOWN DN10 D100 ENTR EXIT
The instrument attempt to automatically calibrate
the channel … then beep.
DIAG AIO CONC_OUT_2 D/A/ CAL ERROR
EXIT
If a current meter is not available, an alternative method for calibrating the current loop outputs is to
connect a 250
  1% resistor across the current loop output. Using a voltmeter connected across the
resistor, follow the procedure above but adjust the output to the following values:
Table 6-21: Current Loop Output Calibration with Resistor
Full scale
Voltage for 2-20 mA
(measured across resistor)
Voltage for 4-20 mA
(measured across resistor)
0% 0.5 V 1.0 V
100% 5.0 V 5.0 V