Teledyne 9110T Using the Analog Output Test Channel, Test Channel Outputs as Diagnostic Tools

Model 9110T NOx Analyzer Troubleshooting & Service

12.2. USING THE ANALOG OUTPUT TEST CHANNEL

The signals available for output over the 9110T’s analog output channel can also be used as diagnostic tools. See Section 5.9.2 for instruction on activating the analog output and selecting a function.

Table 12-3: Test Channel Outputs as Diagnostic Tools

TEST	DESCRIPTION	ZERO	FULL	CAUSES OF EXTREMELY
CHANNEL			SCALE	HIGH / LOW READINGS
				Failed PMT
PMT	The output of the PMT			PMT Temperature too High/Low
		0 mV	5000 mV	Bad PMT Preamp PCA
	detector converted to a 0
DETECTOR				Failed HVPS
	to 5 VDC scale.
				Misadjusted HVPS drive Voltage
				Light Leak in reaction cell
OZONE	The flow rate of O3	0	1000
	through the analyzer as			Check for Gas Flow problems in the O3 gas lines.
FLOW	measured by the O3 flow	cm3/min	cm3/min
	sensor
SAMPLE	The calculated flow rate	0	1000	Check for Gas Flow problems in the sample gas lines.
	for sample gas through
FLOW		cm3/min	cm3/min
	the analyzer.
SAMPLE	The pressure of the
	sample gas measured	0 In-Hg-A	40 In-Hg-A	Check for Gas Flow problems in the sample gas lines.
PRESSURE	upstream of the Auto
	Zero Valve
RCELL	The pressure of gas	0 In-Hg-A	40 In-Hg-A
	inside the reaction cell of			Check for Gas Flow problems in all gas lines.
PRESSURE
	the sensor module
RCELL TEMP	The temperature of gas	0 °C	70 °C
	inside the reaction cell of			Same as RCELL TEMP WARNING in Table 12-1.
	the sensor module
	The temperature of the
IZS TEMP	permeation tube oven of	0 °C	70 °C	Same as IZS TEMP WARNING in Table 12-1.
	the optional internal span
	gas generator.
CONV TEMP	The temperature NO2 	0 mV	5000 mV	Same as CONV TEMP WARNING in Table 12-1.
	NO converter
PMT TEMP	The temperature inside	0 °C	50 °C	Same as PMT TEMP WARNING in Table 12-1.
	PMT
BOX TEMP	The temperature inside	0 °C	70 °C	Same as BOX TEMP WARNING in Table 12-1.
	the 9110T’s chassis
HVPS	Represents the output	0 mV	5000 mV
	voltage of the PMT's high			Same as HVPSWARNING in Table 12-1.
VOLTAGE
	voltage power supply

Teledyne Analytical Instruments 269