1
This instrument is used connecting a tipping bucket type rainfall sensor with a cable. Numbers of electric
contacts (pulse) are recorded on a chart that wounded around a cylinder.
Main Component Parts
1. Cylinder type clock
: Quartz clock driven by a battery
2. Recording pen
: Cartridge pen (violet)
3. DC solenoid
4. Snail cam and ratchet mechanism
5. Damping device
: Liquid type
6. Base and cover
7. Battery for clock
: “C” size battery x 1 pc.
8. Batteries for counter
: “D” size battery x 2 pcs
Specifications
1. Type
: Electromagnet activated ratchet
2. Cylinder speed
: 1-day rotation: 12.0mm per hour
7-day rotation: 43.5mm per day
3. Effective width of chart
: 100mm
4. Min. graduation
: 2mm
5. Movement width of pen per pulse : 1mm (a half of the scale)
6. Movement of pen
: The pen moves up a half of the scale per pulse. When the pen
reaches 100 pulses, it automatically returns to zero to begin
another traverse.
7. Min. operative electric current
: 60mA
8. Resistant of solenoid coil
: approx. 32ohm
9. Power requirements
:
①
3VDC (2
“D” size batteries are built into the unit)
②
External battery (3 to 12VDC)
③
Allowable electric current: 400mA
10. Width of input pulse
: More than 0.1sec. (ON. OFF signal by contact)
11. Contact interval
: More than 0.2sec. (Interval between ON and OFF)
12. Cylinder rotation
: 1-day and 7-day changed by the gears provided.
13. Operation ambient
: -10 to +40ºC
14. Dimensions and Weights
: 300(W) x 140(D) x 200(H) mm, approx. 3.7kgs
15. Standard accessories
: One
“C” size battery, two “D” size batteries,
55 sheets of 7-day chart, one cartridge pen is a factory set
