Instruction 0024-9396
13
Fyrite Pro Quick Reference Guide
CO Channel Zero
(Model 100/105/120/125)
If the CO channel is set up for manual zero (refer to Sec tion 3.5.3 in
Instruction 24-9395), and if the CO Screen shows a value other than zero
when sampling fresh air, then zero the CO channel as follows:
1. With the analyzer turned OFF, place the unit in fresh, ambient air;
then press and hold down the
ENTER
button.
2. Press the
I/O
button and release it. Observe that all LCD seg ments
are turned ON.
3. Release the
ENTER
button. Observe the unit’s model number and
soft ware version are displayed. The word “CAL” is then displayed
while the unit counts down its warm-up period.
4. Immediately after warmup the CO CAL Screen should appear.
5. Use the and buttons to set the displayed value to 0 ppm.
6. Save the new zero value by holding down the
ENTER
button for 2 sec-
onds; after which, the analyzer enters its Run Mode.
Using the Backlight
The LCD can be read in dimly-lit areas by pressing the
LIGHT
button.
The backlight automatically turns OFF after 10 minutes of keyboard inactiv-
ity, but can be turned OFF at any time by again pressing the
LIGHT
button.
Using the Probe
A rigid stainless steel probe with handle, connected to a flexible hose with
integral water-trap / filter can be used to draw a gas sample into the ana-
lyzer from the room, grilles, diffusers, and furnace flues.
The hose and probe assembly can be detached from the analyzer when the
operator desires to sample without the probe.
