Teledyne Max-5 - Combustion efficiency analyzer - Manual (Page 18)

To store reading press ENTER. The word SPAN will light up on top of the LCD. For span
calibration a known higher temperature input would be required or changes to the low
temperature. So if span calibration is not desired, press ENTER to return to normal operation.
NOTE: Centigrade readings are automatically stored in memory. To store Fahrenheit readings,
press COMB/TEMP key, then press
°F/°C key.
MANUAL CALIBRATION (OPTIONAL) (For Oxygen Span, CO and Combustibles Zero)
NOTE: If automatic calibration is not desired, the following manual calibration procedure
applies.
NOTE: All references to zero gas during calibration means clean ambient air.
1.
Oxygen Span:
Press LOGO and CAL at the same time, then the “O
2
key. A number will appear in the
“O
2
” section of the LCD; use the arrow keys to increase or decrease the reading as
necessary to agree with the span gas concentration (usually air at 20.9% oxygen). Press
ENTER to store the value and return to normal operation.
2.
Combustibles:
Press LOGO and CAL simultaneously, then COMB. The LCD will display the current
combustibles reading and the word “ZERO” at the top. Expose the combustibles sensor
to its zero gas and use the arrow keys, as needed, to adjust the reading to the zero gas
concentration (usually zero). To accept the value press ENTER. SPAN is displayed at
the top of the LCD display. Run combustibles span gas through the instrument; use the
up or down arrow to adjust the number displayed on the LCD to match the concentration
marked on the tank (% CH
4
), if required. Press ENTER to store the value and return it to
the operating mode.
3.
Carbon Monoxide:
Press LOGO and CAL at the same time, then CO/EFFIC. The LCD will display the
current carbon monoxide reading and the word “ZERO”. Run zero gas through the
analyzer, use the arrow keys, as needed, to adjust the reading to the zero gas con-
centration (usually zero). To store and proceed to manual span calibration, press
ENTER,
SPAN & WAIT is displayed at the top of the LCD. Run carbon monoxide span gas
through the instrument; use the up or down arrow keys to adjust the number displayed
on the LCD to match the concentration marked on the tank (PPM CO), if required.
Press ENTER (after WAIT message disappears) to store the value and return to the
normal operating mode.