Campbell Scientific 52202 52202 Electrically Heated Rain and Snow Gage - Page 9

52202 Electrically Heated Rain and Snow Gage 4.3 Wiring to a Control Port Dataloggers listed in Table 4-2 have the capability of counting switch closures on some of their control ports. When a control port is used, the return from the rain gage switch must be connected to +5 volts on the datalogger. TABLE 4-2. Wiring for Control Port Input Color Description Black Signal CR800 CR1000 CR3000 Control Port CR500 CR510 C2/P3 White Signal 5 V 5 V Return Clear Shield CR10X Control Port 5 V CR23X Control Port 5 V G The CR10 does not support the use of control port inputs with the Pulse Count instruction. 5. Datalogger Programming NOTE This section is for users who write their own programs. A datalogger program to measure this sensor can be generated using Campbell Scientific's Short Cut Program Builder software. You do not need to read this section to use Short Cut. Precipitation is measured using a Pulse Count with a switch closure configuration code. The multiplier used in the Pulse Count instruction determines the units in which rainfall is reported (see Table 5-1). TABLE 5-1. Multipliers Rain Gage 52202 0.01 in. 1 in. 0.1 mm 1 mm 0.394 0.00394 1.0 0.1 5.1 Pulse Channel Example Programs The following example programs use a pulse channel to read the output from the precipitation gage. The CR1000 example will also work with the CR800, CR850, CR3000, and CR5000. CR9000(X) programming is similar to the CR1000 except it has an additional parameter in the PulseCount instruction to specify the pulse module's slot. The CR10X program will also work with the CR500, CR510, CR10, 21X or CR23X. CR7 programming is similar to the CR10X but has an additional parameter in the PulseCount instruction to specify the slot that the Pulse Card is in. 5