Teledyne 450H Message/Test Measurement Field, Test Message, Test Measurements, Warning Message

Message/Test Measurement Field

The message field shows warning messages or test measurements. Tables 2.2 and 2.3 summarize the test measurements and warning messages and their meanings. Refer to Section 2.3 for detailed information on viewing test measurements and warning messages and clearing warnings.

Test Message		Meaning
TIME=xx:xx:xx		Current time-of-day (HH:MM:SS)
RANGE = xxxx wt%		Full-Scale concentration for analog
		output
O3 MEAS=xxxxx MV		Current UV reading, measure channel
O3 REF=xxxxx MV		Current UV reading, reference channel
PRESS=xxx PSIA		Absorption cell pressure - psia
GAS TEMP=xxx C		Temperature of the sample gas(deg. C)
LAMP TEMP=xxx C		UV Lamp Temperature (deg C)
BOX TEMP=xxx C		Internal box temperature (deg. C)
TABLE 2.2	TEST MEASUREMENTS

Warning Message		Meaning
SYSTEM RESET		Issued whenever Monitor is powered on
RAM INITIALIZED		RAM was erased
UV LAMP WARNING		UV lamp < 2500mV OR => 5000mV
UV LAMP SHUTDOWN		UV lamp temp control not working
SAMPLE FLOW WARNING		Sample flow < 700 cc/m
SAMPLE PRESSURE WARN		Sample pressure < 15 or > 35 In-Hg-A
GAS TEMP WARNING		Gas temp < 10 or > 50 deg. C
BOX TEMP WARNING		Box temp. < 12 deg. C or > 55 deg. C
ANA LAMP TEMP WARN		UV lamp temp < 51 or > 61 deg. C
V/F NOT INSTALLED		V/F card not installed or bad
TABLE 2.3	WARNING MESSAGES

Menu Field

The menu field changes depending on the mode of the Monitor and the buttons that have been pressed. It indicates the current function of each of the 8 pushbuttons below the display.

The 8 pushbuttons below the display are programmable by the CPU in that their functions change depending on the mode of the Monitor or the operations being performed. The legend above a button identifies its current function. If there is no legend above a button, it has no function and will be ignored if pressed.

P/N 02826B1 Teledyne API Model 450H O3 Monitor Instruction Manual - Page 29