CM4 Four-Point Continuous Monitor
CM4 Technical Manual
5-3
3. Open the tape load lever and remove the carrier. (See
.)
4. Insert the verification card into the detector head with Stain
1 facing the front of the CM4. Make sure that Stain 1 is fully
inserted into the detector head.
5. Carefully close the tape load lever.
6. Press CURSOR ARROW RIGHT on the numeric keypad. The
readings for Stain 1 are stored. The display reads:
INSERT STAIN 2 PRESS
7. Open the tape load lever.
8. Remove the verification card.
9. Turn the card and fully insert Stain 2.
10. Carefully close the tape load lever.
11. Press CURSOR ARROW RIGHT.
The display shows one of two messages:
VERIFY SUCCESSFUL
or
F24 OPTICS FAIL
12. Open the tape load lever and remove the verification card.
If the optics verification is not successful, repeat the procedure if it
not successful after the second test, see
Section 9.5
, Cleaning the
Chemcassette Optics. Once the cleaning is complete, repeat the optics
verification procedure. Contact Honeywell Analytics if the instrument
prints and displays the error message after a second optics verification
attempt.
13. Reinstall carrier and close tape load lever.
Press RESET to return to the Calibration main menu.
5.3 Function 1.2 – Manual K-Factor
NOTE:
Some local fire ordinances require certified calibration at
installation or annual intervals. While dynamic calibration is
not required for proper operation of the Model CM4, Honeywell
Analytics offers an optional Z-Cal calibration program which can
quickly and safely satisfy your local needs. Contact Honeywell
Analytics’ Service department for this service.
NOTE:
For detailed instructions on gas calibration, refer to Technical Note
971092, “Gas Verification of Chemcassette Monitors.
”
The Manual K-factor adjusts the calculated concentration of a CM4
point. The K-factor is set at 1.000 for all gases during factory gas
calibration. Change the factor only if the instrument’s concentration
readings do not match that of a known calibration gas.
U s e a t e s t g a s o f k n o w n c o n c e n t r a t i o n a n d
a t a m b i e n t h u m i d i t y w h e n u s i n g t h i s f u n c t i o n
to re-calibrate the CM4.
A K-factor is the numeric result of a formula used to adjust the CM4
output of gas concentrations. The K-factor may be used to change
the sensitivity of the instrument. Adjustments to concentration are
made after calculation of concentration, and before the following are
determined:
Display
Serial output
Optional current loop (4-20 mA)
Exceeding alarm level
The factory-set K-factor is 1.000 for all gases.
To calculate a new K-factor, use the following formula:
True Concentration Value of Test Gas
CM4 Reading
K =
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