Ametek 241CE II User Manual page 86

Sub-Menu Item Description
* Water mirror surface LED brightness level, where 'n' = the LED level. This level can be any
WLED n
value between 0–4095, which represents a drive-current range of 0–50 mA. Do not adjust
this value unless instructed to do so by an AMETEK Service Representative.
Note:
* Hydrocarbon mirror surface LED brightness level, where 'n' = the LED level. This level can
HCLED n
be any value between 0–4095, which represents a drive-current range of 0–50 mA. Do not
adjust this value unless instructed to do so by an AMETEK Service Representative.
WMWarn n Water mirror surface drift warning limit, derived from the Water-side mirror LED within
the analyzer's Measuring Cell. The value is displayed as a percent (%) of the change in the
phototransistor signals between two consecutive measuring cycles, where 'n' = the current
percentage allowance.
WMWarn is used to adjust the "w Dirty Cell" status alarm setpoint. If the Water mirror surface
becomes contaminated, the recorded phototransistor signal will change. The setpoint is
used to specify the allowable percentage change in the phototransistor signals between
two consecutive measuring cycles. When the difference between the phototransistor signal
at the end of the Purging/Hold Stage and the previously measured value is more than the
warning setpoint percentage, the "w Dirty Cell" SCode is displayed. The Purging/Hold Stage
is also repeated. The default value for this warning setpoint is 10 % (typical value for most
applications).
HCMWarn n Hydrocarbon mirror surface drift warning limit, derived from the Hydrocarbon-side mirror
LED within the analyzer's Measuring Cell. The value is displayed as a percent (%) of the change
in the phototransistor signals between two consecutive measuring cycles, where 'n' = the
current percentage allowance.
HCMWarn is used to adjust the "w Dirty Cell" status alarm setpoint. If the Hydrocarbon mirror
surface becomes contaminated, the recorded phototransistor signal will change. The setpoint
is used to specify the allowable percentage change in the phototransistor signals between
two consecutive measuring cycles. When the difference between the phototransistor signal
at the end of the Purging/Hold Stage and the previously measured value is more than the
warning setpoint percentage, the "w Dirty Cell" SCode is displayed. The Purging/Hold Stage
is also repeated. The default value for this warning setpoint is 10 % (typical value for most
applications).
WTrg1 n * Water detection first (low) trigger level, derived from the Water-side phototransistor signal
within the analyzer's Measuring Cell, where 'n' = the current trigger level threshold. This
variable allows you to specify the low threshold of the increasing water phototransistor
signal. Do not adjust this value unless instructed to do so by an AMETEK Service
Representative.
* Water detection second (high) trigger level, derived from the Water-side phototransistor
WTrg2 n
signal within the analyzer's Measuring Cell, where 'n' = the current trigger level threshold.
This variable allows you to specify the high threshold of the increasing water phototransistor
signal. Do not adjust this value unless instructed to do so by an AMETEK Service
Representative.
HCTrg1 n * Hydrocarbon detection first (low) trigger level, where 'n' = the current trigger level
threshold. This variable allows you to specify the low threshold of the increasing hydrocarbon
phototransistor signal. Do not adjust this value unless instructed to do so by an AMETEK
Service Representative.
HCTrg2 n * Hydrocarbon detection second (high) trigger level, where 'n' = the current trigger
level threshold. This variable allows you to specify the high threshold of the increasing
hydrocarbon phototransistor signal. Do not adjust this value unless instructed to do so by
an AMETEK Service Representative.
3-20 | 241CE II Hydrocarbon Dewpoint Analyzer
This signal is derived from the Water-side mirror LED within the analyzer's
Measuring Cell. This measurement is not related in any way to the external
water signal.
PN 903-8797, Rev A