Fir 1, 2, 3 & 5000
Ion Science Lt d
Ion Science L td
Page 18 of 53
Instrument Menu
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Alarm
1, 2, 3 & 5
When in 'Survey' mode, all upper and lower sensor alarm levels can be set by the user to indicate
particular levels of detection specific to the users needs. Both alarms give an audible and visible
output (flashing LED) but with increased urgency with the upper alarm. An alarm state will occur
when the preset alarm levels are exceeded, the alarms can be reset by pressing the ENTER key
but repeatedly trigger if the alarm level is still exceeded.
Please note: It is the user’s responsibility to respond appropriately to an alarm condition
.
Upper and Lower alarm levels in survey mode are easy to adjust on the
instrument. Select the Alarm symbols (as above) and press the ENTER key.
Use the UP and DOWN keys to select the
When in Health and Safety mode, alarms are triggered by STEL and TWA alarm levels pre-programmed into
the instruments gas table. An alarm in Health & Safety mode indicates the user has been exposed to levels
exceeding those set within the Fir gas table. When Fir alarms in Health and Safety mode,
the relevant TWA or STEL figure shown on the display will flash. These values cannot be changed either via
the instrument or the Fir software. However additional entries can be entered into the gas table via
the Fir software with their own STEL and TWA values (see page 29 for more information.)
Sound
1, 2, 3 & 5
A range of audible options can be selected to make the Fir respond in different ways.
Signal response: When selected, the rate at which the instrument 'Beeps' increases with the
detected gas.
Confidence: When selected the instrument 'Beeps' every 15 seconds to indicate it is functioning.
This feature is useful if the instrument is out of sight.
Key Press: The instrument 'Beeps' when any key on the keypad is pressed when this opti
Alarm: This feature has the ability of switching off the alarm sound. For safety reason Ion Science
Ltd suggests this function is never switched off unless there are specific reasons for not wanting to
silence the alarms.
Alarm graphic in the function menu and press ENTER. Select the alarm you wish to adjust (Upper or Lower)
and press the ENTER key again. Use the UP and DOWN keys to change the alarm setting. These alarms can
also be easily adjusted on a PC via the Gas Table in the 1stPC software, that is then downloaded to the
instrument via the IRDA link. Please note that for safety reasons the lower alarm cannot be set above the
upper alarm.
