Honeywell SPM, Техническое руководство

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SPM Single Point Monitor
SPM Technical Handbook 5-8
cycle setting in one half minute increments.
Above 17 minutes, the setting rotates to zero.
Continue to press alarm reset (11) until the
display shows the desired duty cycle setting.
5. To store the new setting, press alarm test (10)
and hold for two seconds. The digital display (19)
shows (TIME SET).
6. Close the tape load lever (18) to return to monitor
mode.
5.3.3 Duty Cycle Concentration Reporting
In between sample periods, the digital display (19)
alternately shows the last gas concentration and the
time remaining to the nearest minute before the next
sample period. The concentration displays for ten
seconds and the time before the next sample displays
for two seconds.
After each sample period, the 4-20 mA signal updates
to the latest concentration and holds that value until the
next sample period.
Relay contacts are activated when the concentration
exceeds the respective alarm value and latched until
reset.
5.4 ChemKey Option
The ChemKey option allows monitoring of different
gases with one SPM unit. To change gases, change
the Chemcassette
® and insert the new ChemKey. Gas
information, including type of gas and alarm levels,
is programmed into a memory chip sealed within the
ChemKey.
5.4.1 ChemKey Components
The illustration below shows a side view of a typical
ChemKey. To activate the ChemKey, insert the key in
the front panel slot (32) and turn clockwise one-quarter
turn. Note the markings on the ChemKey:
5.4.2 SPM Legend (71)
The SPM ChemKey is different from ChemKeys for
other Honeywell Analytics systems. Make sure that
the ChemKey you use on an SPM unit carries an SPM
designation.
5.4.3 Gas Symbol/Name (72)
The key carries the chemical symbol or name of the
gas for which the ChemKey is programmed. This gas
symbol or name must match the Chemcassette
® for the
target gas.
SPM
ARSINE
25/50 ppb
71
73
72
5.4.4 Alarm Levels (73)
The bottom line on the ChemKey label shows the factory
set alarm levels 1 and 2 for the target gas.
5.4.5 Family Chemcassettes
®