Sens SG-A1, User Manual

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SENS.413347.015RE
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- value of measured concentration (only gas detector models with built-in digital
indicator);
- error code in accordance with table 8.5 (only gas detector models with built-in digital
indicator);
- availability of power supply voltage;
- exceeding of measurement range;
- operation mode - special;
- alarm, in case of specified concentration thresholds exceeding;
- failure, in cases:
- reducing of gas detector power supply voltage below specified level;
- loss of connection with primary transducer;
- negative results of self-test.
Note - Special mode - self-test, verification, emulation mode, error occurrence, power
supply voltage drop below normal.
"FAILURE" indicator with yellow glowing color indicates failures of gas detector, results of
self-test or exceeding of measurement range.
Operation modes of "FAILURE" indicator:
-
no glow - no gas detector failures, positive results of self-test;
- constant glow - failure - no connection with primary transducer or negative results of
self-test;
- rapid interrupted glow (glow and pause durations are approximately equal to 0,5 s) -
failure - power supply voltage below normal;
- interrupted glow (three glow pulses, then 1.5 s pause, repeated) - exceeding of
measurement range (100% LFL by verification component).
"THRESHOLD" indicator with red glowing color informs the operator about exceeding of
gas or vapors concentration thresholds specified for alarm signaling.
Operation modes of "THRESHOLD" indicator:
-
no glow - value of concentration is below specified thresholds for alarm signaling;
- interrupted glow - value of concentration above specified threshold of alarm non-locking
signaling;
- constant glow - value of concentration above specified threshold of alarm locking
signaling.
"POWER" indicator with green glowing color informs the operator about availability of
electric power supply and operation mode of gas detector.
Operation modes of "POWER" indicator:
-
no glow - no power supply of gas detector;
- constant glow - power is supplied to gas detector;
- interrupted glow - gas detector is in special operation mode.
Interrupted simultaneous synchronous glowing of all indicators (glow and pause durations
are approximately equal to 1 s) means that gas detector is in self-test mode or checking
indication devices operational capability.
Reset of gas detector is performed by touching of exposure area on the face panel with
magnetic key. Thus a return of gas detector to initial state is performed, after triggering of alarm
locking signaling.
7.3 Provision of explosion protection
Gas detector is explosion-proof equipment, complies with requirements of GOST
31610.0, GOST IEC 60079-1, and GOST IEC 60079-29-
1, and has «flameproof enclosure» d
«type of explosion protection. Explosion protection marking of gas detector «
1Ex d IIB T4
Gb
».