Teledyne 300 Troubleshooting using test function values, Off Scale Or Otherwise Non-Valid, Values

10.4 Troubleshooting using test function values

The Model 300 provides the capability to display, on operator demand, the values of Test Functions which allow the observation of key analyzer operating parameters. These Test Functions can be accessed by depressing the TEST Button on the instrument's front panel, with each depression of the button causing the next test function to be displayed. By comparing the values of Test Functions to acceptable operating limits, it is possible to quickly isolate and correct most problems.

NOTE

IF THE VALUE OF ANY TEST FUNCTION IS DISPLAYED

AS “XXXX”, THIS INDICATES THAT THE READING IS

OFF SCALE OR OTHERWISE NON-VALID.

Table 10-2 provides a list of available Test Functions along with their meaning, their range of acceptable values, and the recommended corrective actions if the value is not in the acceptable range. Additionally, Table 1-1 in this manual provides a list of the values of all Test Functions at the time the analyzer left the factory.

TEST FUNCTION VALUES

Test Function	Meaning	Acceptable Values	Corrective Action
			for Unacceptable
			Values
RANGE	The Current Full	Any	None required
	Scale Range Setting
	of the analyzer's
	analog outputs
CO MEAS	The most recent	2000-4800 CNTS	Check and adjust IR
	detector reading		source and Sync
	taken in Measure		Demodulator and
	mode		optical alignment as
			described in Sect.
			10.6.6 and 10.6.8
CO REF	The most recent	2000-4800 mV	Check and adjust IR
	detector reading		source and Sync
	taken in Reference		Demodulator and
	mode		optical alignment as
			described in Sect.
			10.6.6 and 10.6.8
MR RATIO	The ratio of the CO	1.00-1.25	Check CO REF and
	MEAS value to CO		CO MEAS values as
	REF value		described above.

P/N 02163G1 Teledyne API Model 300 CO Analyzer Instruction Manual - Page 87