Glossary - Honeywell SPM Flex User Manual

SPM Flex Gas Detector

Glossary

Term
4-20 mA loop
Chemcassette cartridge
®
Ethernet
In monitor
Latching alarm or fault
LCD
LED
Modbus TCP
Non-latching alarm or
fault
Out of monitor
Relay
TWA
USB
VDC
8
An analog communication method using a current
loop to indicate concentration readings and fault
status�
An easy-to-install case that carries Honeywell's
Chemcassette tape� Cartridges are specific to
different gas types/families�
Commonly used network technology for wired Local
Area Networks�
The unit is actively monitoring the specified gas or
family of gases
When configured, the SPM Flex will hold the alarm or
fault status active until the user performs an alarm/
fault reset�
Liquid Crystal Display
Light Emitting Diode
Communications protocol running over Ethernet that
is commonly used for communicating with industrial
devices�
An alert in which the SPM Flex will reset
automatically when the condition is no longer
present (i�e�, the detector does not have to be reset
by the user)�
The detector is on but idle
An electrical-operation output switch that can be
used to indicate the presence of alarm and fault
conditions�
Time Weighted Average, the average exposure to a
harmful gas, usually calculated over a period of eight
hours (a the typical workday)�
Universal Serial Bus is an industry standard
communications protocol and bus that is commonly
available on personal computers�
Volts of Direct Current
Description