Alarms and System Status

Bits are numbered from right to left, starting with Bit 0 on the far right. A bit value of 1 indicates an active alarm or status. Refer to the table below for system status descriptions.

Alarm A – Critical Failure

Triggered during flow sensing errors or main unit failures. The LCD backlight flashes red.

Alarm A Error Code Definition: Bits are defined from MSB (Bit 7) to LSB (Bit 0), with each bit representing the following:

Bit	Alarm Definition	Alarm Code	Trigger Condition
7	NA
6	NA
5	NA
4	NA
3	NA
2	NA
1	NA
0	Ultrasonic Sensor Communication Error	D01	Caused by a power supply issue or sensing module damage. Verify the power supply. If the error persists, return the unit for factory service.

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Alarm B – Out of Specification

Used for flow beyond the set range or other conditions requiring attention. Configurable under D parameter category. The main screen LCD backlight turns solid red when active.

Alarm B Error Code Definition: Bits are defined from MSB (Bit 7) to LSB (Bit 0), with each bit representing the following:

Bit	Alarm Definition	Alarm Code	Trigger Condition
7	Dosing target reached	D16	Dosing target reached
6	Totalized flow exceeds target	D09	Totalized flow exceeds or falls below the preset target *Note
5	Value exceeds analog output upper limit	D12	Value exceeds the analog output upper limit
4	Value below analog output lower limit	D12	Value falls below the analog output lower limit
3	Flow velocity > 6 m/s or < –6 m/s	D13	Flow velocity > 6 m/s or < –6 m/s
2	OCT timing too slow	D14	(OCT pulse count + 1) exceeds the limit
1	Instantaneous flow above upper limit	D05	Instantaneous flow above upper limit
0	Instantaneous flow below lower limit	D05	Instantaneous flow below lower limit

* Note

D09, D10, D11 Cumulative Alarm Description

Example 1: Positive Flow
Enable the D09 cumulative alarm, and set the D10 cumulative condition to "Greater than target".
Set the D11 cumulative target to a positive number, such as +100.
When the cumulative positive flow exceeds 100, the system will trigger the cumulative alarm.

Example 2: Negative Flow
Enable the D09 cumulative alarm, and set the D10 cumulative condition to "Less than target".
Set the D11 cumulative target to a negative number, such as -500.
When the cumulative negative flow is less than -500, the system will trigger the cumulative alarm.

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Alarm – C: Maintenance Required

Used to indicate that the flowmeter requires maintenance. Configurable under the Maintenance/Diagnostic category. The main screen LCD backlight turns solid red when active.

Alarm C Error Code Definition: Bits are defined from MSB (Bit 7) to LSB (Bit 0), with each bit representing the following:

Bit	Alarm Definition	Alarm Code	Trigger Condition
7	NA
6	NA
5	NA
4	NA
3	Poor ultrasonic signal	D03	Signal strength at 0 bars.
2	NA
1	excessive line impedance or no wiring connection	D15	Excessive line impedance or no wiring connection on Iout (0/4–20 mA) = 1, normal = 0. Parameter D14 must be set to On or Do Not Disturb.
0	NA

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System Status

Status codes are defined from MSB (Bit 7) to LSB (Bit 0), with each bit representing the following:

Bit	Alarm Definition	Alarm Code	Trigger Condition
7	NA
6	NA
5	NA
4	NA
3	NA
2	NA
1	NA
0	OCT Status		OCT Status NC - Normally Closed (allows current flow) shows “1” NO - Normally Open (no current flow) shows “0” E01 is set to NC by default. Alarm S value = 1