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コントロールパネル Crowcon GasflagのPDF インストーラーとユーザー向けの設置、操作、メンテナンスに関する説明書をオンラインで閲覧またはダウンロードできます。Crowcon Gasflag 8 ページ。 Single channel control panel alarm only apparatus
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3 CONFIGURATION
3.1 Setting alarm levels 1 and 2.
The test points for ALARM 1, ALARM 2 and 0 V can be found on the
CONTROL PCB. The alarm level adjustment potentiometers can be found
to the right of the test points marked as VR10 and VR11.
A DVM capable of measuring up to 200 mV with at least 10 MΩ input
resistance is required. DO NOT USE a moving coil meter as this will affect
the values read, leading to inaccurate setting of the trip points. Refer to the
specification sheet supplied with the unit for the preset alarm settings.
To set Alarms
1 Connect the negative probe of the DVM to 0 V and positive
probe of the DVM to the appropriate alarm test point.
The alarm range of 4-20 mA is read as 40 - 200 mV on the
DVM.
2 Adjust the potentiometer VR10 (Alarm 1) and VR11 (Alarm 2)
to read the desired gas alarm level.
Alarm mV =
For example, if the gas alarm is required at 50% LEL on a
0-100% LEL detector then adjust the setting so that the DVM
reads 120 mV, equivalent to 12 mA in the detector loop.
3 Write the gas type, gas range and alarm level value on the
sticky label provided on the CONTROL PCB. We recommend
that both the alarm levels and the mV setting is recorded.
3.2 Alarm configuration
When you have completed the alarm level settings the next stage is to
configure the alarm settings using the links provided on the CONTROL
PCB, this table can be found printed on the CONTROL PCB.
3.2.1 Alarm 1 and Alarm 2 configuration
A RISING alarm is suitable for most detectors as a 'rise' in gas level is the
most commonly monitored action. A FALLING alarm is typically used to
monitor oxygen levels as a fall in the oxygen level is most critical. LINKS
15 and 17 set the Gasflag configuration for ALARM 1 and 2. The links
should be set to A for FALLING or B for RISING.
160 x alarm level + 40
gas range
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