ABB AW101 Instruction Manual

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ABB AW101 Instruction Manual Manual pdf 9 page image

Water Hardness AnalyzerAW101 Testomat 4 Description of Displays and Operating FeaturesIM/AW101 Rev. C 74.4 Description of the Relay OutputsLV1 and LV2 limit value outputsTo signal that a limit value has been exceeded, two volt-freerelay contacts are available. For both contacts the limit values,hysteresis and alarm action can be programmed independently:4.5 Diagnostic Alarm MessagesThe Alarm output is a volt-free change-over relay contact.During normal operation the contact between terminals 16/17 isclosed and the one between terminals 15/16 is open. If thevoltage fails or the alarm is activated, the contact betweenterminals 15/16 is closed and the one between 16/17 is open.The unit is equipped with a range of alarm notification functions. Activation:The Alarm output remains activated (with terminals 15/16closed) as long as the fault persists. Alarm Indicators:Text and a red LED Alarm on the display indicate a fault. Alarm cancellation:The Alarm output condition is cancelled using the Hornkey.An error message can only be deleted after the fault hasbeen corrected.Exception – reagent low level, this message is confirmedin the M-menu by entering in the new reagent level.The following conditions activate the Alarm output and aredisplayed: Low-water pressure Low reagent level Function fault optics Measuring fault – dirty chamber Measuring fault – analysis Measuring fault – turbid sample Function fault – dosing pump Measuring range exceeded Function fault outlet to drainError messages are described in Table 6.1, page 14.For a more detailed description of the programming refer topage 11. For general maintenance refer to page 15.Function Type ofcontactActionLV1active when inexcess of limitvalue 1Volt-freechange-overcontactProgrammable: Continuous contact Impulse (1 … 99seconds/minutes) Interval (1 … 99seconds/minutes) Two-step regulator Hysteresis (1, 2 or 3 limitvalue in excess)LV2active when inexcess of limitvalue 2Volt-freechange-overcontactProgrammable: Continuous contact Impulse (1 … 99seconds/minutes) Interval (1 … 99seconds/minutes) Hysteresis (1, 2 or 3 limitvalue in excess)Table 4.1 Relay Outputs