Level Sensor Details

Site Summary component > Sensor Status button > Further Details button (bottom left of screen)

This component displays water level sensor configuration details

Level Sensor Details screen

Note

In this document, details are given for the upstream sensor 1 tags only. The other upstream and downstream tags behave in the same way unless otherwise noted.

Datum

The elevations of water and gate tip at a site are measured against some known elevation called a datum. This section gives the location of reference datum levels for the site. See Datum Levels for more details.

Field	Description	Tag
Site Datum	Distance of the Site Datum from the reference datum. Usually 10 m in a Local reference system.	SITE_DATUM
Sensor Datum	For each sensor this give the distance of the level sensor datum from the site datum.	eg. USL1_DATUM

Level Sensor Raw Values

The tags in this section display level sensor raw measurements as measured directly from the level sensors without using the reference elevation datum.

Field	Description	Tag
Raw Water Level Sensor	Level sensor raw measurement (relative to the U/S level sensor 1 datum)	eg. USL1_RAW

Level Sensor Serial and Software Version Nos

Field	Description	Tag
Sensor Serial No	Level sensor serial number	eg USL1_SERIAL_NO
Sensor S/W Ver	Level sensor controller software version	eg USL1_SENS_VER

Level Sensor Configuration

Field	Description	Tag
Cycle Sensor Power	Power the level sensors off and on. This is sometimes used in troubleshooting sensor faults.	CYCLE_SENS_PWR
Raw Water Level Filter	The filtering option is generally only used with level sensors that do not have a filter built-in. The raw level water filter smoothes the water level readings by removing spikes and waves. The filter value specifies the percent weight to place on the previous reading when adjusting the current reading. The default value is 70%.	LEV_FILTER_PERCENT
Level Sensor Preference Method	The software supports 5 level sensor readings. Primary sensors (USL/DSL), secondary sensors (USL/DSL) and a remote sensor (remote USL). When both primary and secondary sensors are available, the reading are averaged. Sometimes, a sensor may be redeployed in a location for monitoring a level nearby which has no relation to the gate control. In this instance, the LEV_SENS_PREF may be used to block the use of this sensor for gate control.	LEV_SENS_PREF

Field

Description

Tag

Cycle Sensor Power

Power the level sensors off and on. This is sometimes used in troubleshooting sensor faults.

CYCLE_SENS_PWR

Raw Water Level Filter

The filtering option is generally only used with level sensors that do not have a filter built-in.

The raw level water filter smoothes the water level readings by removing spikes and waves. The filter value specifies the percent weight to place on the previous reading when adjusting the current reading. The default value is 70%.

LEV_FILTER_PERCENT

Level Sensor Preference Method

The software supports 5 level sensor readings. Primary sensors (USL/DSL), secondary sensors (USL/DSL) and a remote sensor (remote USL). When both primary and secondary sensors are available, the reading are averaged. Sometimes, a sensor may be redeployed in a location for monitoring a level nearby which has no relation to the gate control. In this instance, the LEV_SENS_PREF may be used to block the use of this sensor for gate control.

LEV_SENS_PREF

Sensor Reading Limits

Field	Description	Tag
Level Min Reading	Level sensor minimum allowed raw water level sensor readings. Defaults to 50 mm for upstream levels. When the water level falls below this point, the water filter at the base of the sensor may give spurious results. This setting discards those spurious readings. Defaults to -1 mm for downstream levels to disable the out-of-range alarm for low downstream water levels.	eg.USL1_MIN_READING
Level Max Reading	level sensor maximum valid raw water level sensor readings. The default is zero .	eg.USL1_MAX_READING
Level Max Change	The default value for MAX_READING is 0mm. The default value of MAX_CHANGE is 0 which disables the maximum change function. When MAX_CHANGE > 0, we perform a check against the previous raw value to the current raw value. If the difference between the readings is greater than MAX_CHANGE, we assume the reading is invalid but move the previous readings closer to the current reading every minute.	eg.USL1_MAX_CHANGE

Field

Description

Tag

Level Min Reading

Level sensor minimum allowed raw water level sensor readings.

Defaults to 50 mm for upstream levels. When the water level falls below this point, the water filter at the base of the sensor may give spurious results. This setting discards those spurious readings.
Defaults to -1 mm for downstream levels to disable the out-of-range alarm for low downstream water levels.

eg.USL1_MIN_READING

Level Max Reading

level sensor maximum valid raw water level sensor readings. The default is zero .

eg.USL1_MAX_READING

Level Max Change

The default value for MAX_READING is 0mm. The default value of MAX_CHANGE is 0 which disables the maximum change function.

When MAX_CHANGE > 0, we perform a check against the previous raw value to the current raw value. If the difference between the readings is greater than MAX_CHANGE, we assume the reading is invalid but move the previous readings closer to the current reading every minute.

eg.USL1_MAX_CHANGE

Ultrasonic Sensor Datum

The tags in this section display the datums of the ultrasonic sensors. When ultrasonic sensors are installed, the measurements from these sensors are checked to ensure that they do not exceed the maximum reading possible, which is determined by calculating the measurement span of the ultrasonic sensor. This span is calculated as:

ultrasonic sensor datum - ultrasonic sensor reference distance - 50mm

Field	Description	Tag
Level Sensor Datum	Internal level datum of this sensor	eg. USL1_USONIC_DATUM

Ultrasonic Sensor Reference Distance

Field	Description	Tag
Level Ref Distance	Distance from the site datum to the reference mark inside the level sensor housing. This is used for self-calibration of the sensors.	eg. USL1_USONIC_REFD

Sensor Out of Range Count

Field	Description	Tag
Sensor OOR Counter	Count of how many times upstream level sensor 1 recorded a value that was out of range.	eg. USL1_SENS_OOR_COUNT