Campbell-scientific HMP155A Temperature and Relative Humidity Probe Instrukcja Użytkownika Pobierz pdf (Strona 20)

HMP155ATemperature and Relative Humidity Probe

When measuring the HMP155A with single-ended

measurements, the white and black leads must both be

connected to AG on the CR10(X) and CR500/CR510 or to

on the CR1000, CR5000, and CR23X. Doing otherwise

will connect the datalogger’s analog and power ground

planes to each other, which in some cases can cause offsets

on low-level analog measurements. To avoid 3 mA flowing

into analog ground, switch the sensor on/off for its own

measurement.

TABLE 7-1. Connections for Single-Ended Measurements

Color

Wire Label

CR10X

CR1000,

CR3000,

CR800,

CR5000,

CR23X

CR10, CR510,

CR500

21X, CR7

CR200(X)

Yellow Temp Signal Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

Blue RH Signal Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

White Signal

Reference

Black Signal

Ground

Clear Shield G

Red Power

SW12V

SW12V SW12V 12V/SW12V* 12V/SW12V* SW Power

If using

SW12V,

jumper from

SW12V

Control

to Control Port

*On these dataloggers switched power is only available with the SW12V peripheral.

CAUTION

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Campbell-scientific HMP155A Temperature and Relative Humidity Probe Instrukcja Użytkownika Strona 20

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