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MX4428 MXP Engineering / Technical Manual Document: LT0273
Device Information and Programming
Page 3-12 24 March 2006 Issue 1.5
3.4 DETECTOR PARAMETER SETTINGS SUMMARY
The following table gives a summary of the MX4428 default and alternate settings, and
approved range, for each detector type.
Detector Default Alternate Range Comments
814PH
Smoke
12%
(80 det units)
8%
(37 det units)
8% - 12% Enhancement is optional,
default off.
814PH
Smoke
FastLogic
Medium N/A Low, Medium,
High (all
approved with
nominal
sensitivity =
8%)
Enhancement is optional,
default off.
814PH Heat
component
63 N/A 60 - 65 Type B default.
Type A is option
Off is option.
814CH
CO
38ppm
(0.3 MIC X)
(93 det units)
66ppm
(1)
(0.6 MIC X)
(160 det units)
23 - 66ppm
(1)
Enhancement is optional,
default off.
(23ppm = 0.15 MIC X
= 60 det units)
814CH Heat
component
63 N/A 60 - 65 Type A default.
Type B is option
Off is option.
814I 0.39 MIC X
(66 det units)
0.22 MIC X
(23 det units)
0.2 - 0.4 (Aus)
0.2 - 0.6 (NZ)
0.59 MIC X =130 det
units
814H 63 N/A 60 - 93 (Aus)
50 - 80 (NZ)
Type A default. Type B
option.
Types C/D by changing
temperature to 93.
VLC800 Fixed at 100 0.005% / m to
20% / m
Note that actual
sensitivity is adjusted by
PC connected to the
VLC800.
(1)
66ppm is outside the approved range of the 814CH as an ionisation detector. However it
is an accepted value as a CO detector.
Prealarm
The Prealarm default and alternate sensitivities will generally be about 70% - 80% of the
corresponding alarm level. Note that Prealarm will also be more sensitive to rapidly changing
conditions as it does not go through the step limiting filter.
Conversion
Det Units = Detector Units.
Temperatures are already converted by the MXP to degrees C and do not require
conversion.