Transcript
Hydrological Services Pty Ltd
RAINFALL SENTRY
MODEL RS3
INSTRUCTION MANUAL
HYDROLOGICAL SERVICES Pty Ltd 48-50 Scrivener Street Liverpool NSW 2170 Australia Ph. 61 2 9601 2022 Fax. 61 2 9602 6971 E-Mail:
[email protected]
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Hydrological Services Pty Ltd
1.
Introduction
The Hydrological Services Rainfall Sentry model RS3 is a low power, microprocessor controlled device designed to monitor rainfall and operate external pumps and/or solenoid valves to control the discharge of stormwater into a sewage system. It detects pulses from a Tipping Bucket Rain Gauge, and when a set number of tips have been detected within a selected time period, a relay is operated to control a pump. Another settable timer determines how long the relay is held on for. If pulses from the TBRG are detected while the relay is activated, then the relay hold timer is restarted.
Specifications Programmable Settings :
Tipping bucket size (0.2mm, 0.5mm, 1.0mm, 0.01”) Rainfall required to trigger operation (1mm to 20mm)(0.01” to 0.5”) Rainfall Period (1hr to 24 hrs) Relay hold time (1hr to 24 hrs)
Power Requirements :
6V DC (to power internal relay only)
Input :
Tipping Bucket Rain Gauge (TBRG)
Output Relay :
2 x Voltage Free contacts rated at 30V DC 0.5A
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Hydrological Services Pty Ltd
2.
Installation
*** Please Note *** •
The RS3 must be powered by a 6V DC supply.
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The relay contact outputs are voltage free and rated at 30V DC 0.5A.
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If operating a mains powered pump, the user must supply a separate slave relay/contactor.
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The RS3 does not have an IP rating, so a weatherproof enclosure may be required.
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3.
Configuring / Operation
There are 8 LCD screens available for status and configuring the RS3. The screens can be stepped through by pressing the “Scroll” button. The “Select” button is used to change a configurable option (display flashes) – then press “Scroll” to change the option – and press “Select” again to save the selection and stop the option flashing. Press any button to switch on the LCD screen. The LCD will turn off automatically after 15 seconds. LCD Display RSentry3 Rev 1.1
Description Displays the model and software revision
Battery OK
Displays the internal 3.6V lithium battery condition as OK or Low (This battery powers the clock/timer) Replace the battery when “Low”
0.2mm Æ00:15
Displays the rainfall in the last hh:mm if triggered, then it displays “Trig’d” if retriggered by further bucket tips then it displays “Retrig’d”
Reset No Bucket 0.2mm
Allows the operation to be reset. (same as powering the unit off then on) Press “Select” to change the No to a Yes Displays the TBRG bucket size as 0.2mm / 0.5mm / 1.0mm / 0.01in Press “Select” to change the bucket size to match your TBRG
RainTrip 1.6 mm
Displays the amount of rainfall required to trip the relay. Press “Select” to change the rainfall required. (1.0mm to 20.0mm) or (0.01in to 0.50in)
RainTime 1 hr
Displays the period of time in which to measure the rainfall to trip the relay. Press “Select” to change the time period. (1hr to 24 hrs)
HoldTime 1 hr
Displays the period of time the relay will be closed for. Press “Select” to change the time period. (1hr to 24 hrs)
If the “RainTrip” amount of rain falls within the “RainTime” period, then the relay will be triggered. After the relay is triggered and the HoldTime timer starts, any extra bucket tip detected will restart the HoldTime timer that keeps the relay activated. The operation can be Reset at any time by scrolling to the Reset menu and selecting Yes. The operation is shown diagrammatically on the following page.
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Hydrological Services Pty Ltd
This example has the following setup : •
Bucket is set to say 0.2mm
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RainTrip is set to say 1.0mm
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RainTime period is set to say 1 hr
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HoldTime is set to say 3 hrs
which means 5 bucket tips in 1 hour will trip the relay operation, and a bucket tip within the next 3 hours will restart the relay timer.
On Relay State
Off
“HoldTime” period
Tips
“RainTime” period
Timer starts when the first tip occurs
Timer expired and did not have 5 tips in period
Timer starts again
5 tips within the Timer starts again timer period so for each bucket tip while relay is on. relay turns on.
“HoldTime” period expired since no more tips occurred.
Sequence starts again when the first tip occurs
When a rain gauge tip input is detected, the timer is started. If no further tips occur within the timer period then the unit re-enters the reset state. If however, the selected number of tips occur within the time period then the relay is turned on. Once the relay is operated, each tip will restart the timer, whilst maintaining the on state of the relay. If no further tips occur and the timer expires, the relay is turned off and the timer enters the reset state.
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