No.7821-50

Digital Rainfall Indicator with Alarm

RA-001-00

Calibration : Not available

JCSS Accredited Calibration : Not available

This instrument displays rainfall data received from Tipping Bucket Rainfall Sensor (Cat. No. 7821-00) sold separately, and alerts at the same time.

Feature

■ RA-001-00 is designed to be used with Tipping Bucket Rainfall Sensor R1-502 (Cat. No. 7821-00) which outputs the contact signal to RA-001-00.

A built-in microprocessor calculates the rainfall based on the signal, displays the data, and performs the alarm output.

An alarm threshold can be set at your will. Alarm is output through relay contact, light, and buzzer.

Analog output is available by make-to-order.

■ Hourly rainfall and accumulated rainfall (or effective rainfall) are displayed.

■ Two alarms for different values can be set, and each alarm includes relay contact, lighting of the hazard lamp, and a buzzer sound.

First alarm: contact 24VDC, 1A; slow blinking of LED in yellow; a slow intermittent buzzer

Second alarm: contact 24VDC, 1A; fast blinking of LED in red; a fast intermittent buzzer

■ Branch output as a contact pulse available in addition to data display.

24VDC, 1A, operating time > 100 ms

■ Internal battery runs 4 hours even in a blackout

Ask us if you require an optional analog output.

Channel

1 channel

Output content

Hourly, accumulated, or effective rainfall

* Choose either one

* Output impedance less than 500Ω

Output range

0 to 100 mm or 0 to 1000 mm in 0 to 1VDC

* Choose either one

Cat. No.	7821-50
Product name	Digital Rainfall Indicator with Alarm
Model name	RA-001-00
Connectable devices	Tipping Bucket Rainfall Sensor (Cat. No. 7821-00, -10)
Input	One pulse per 0.5 mm of rainfall (1.0 mm available by make-to-order)
Required contact time	0.1 second
Branch output	Contact 24 VDC, 1 A, contact time 0.1 sec
Indication	Hourly rainfall in 4 digits (upper LED) Accumulated rainfall or effective rainfall in 4 digits switched by a key (lower LED)
Display range	0.0 to 999.5 mm/s
Alarm range	Hourly rainfall: 1 to 450 mm Accumulated rainfall: 1 to 999 mm Effective rainfall: 1 to 999 mm
First alarm	contact 24VDC, 1A; slow blinking of LED in yellow; slow intermittent beeping
Second alarm	contact 24VDC, 1A; fast blinking of LED in red; fast intermittent beeping
Operation ambient	0 to 50°C, less than 90%rh without condensing
Max. distance from bucket sensor	500 m if CVVS 1.25 mm² cable is used
Material	Stainless steel
Dimensions	200 (W) x 110 (H) x 200 (D) mm
Weight	3.5 kg
Power	100 or 240 VAC ±10%, 15VA Internal battery runs 4 hours in a blackout. Battery is charged whenever connected to power.