Vaisala HUMICAP HMP41 Spécifications télécharger pdf (Page 9)

Model HMP45C Temperature and Relative Humidity Probe

4. Wiring

Connections to Campbell Scientific dataloggers are given in Tables 4-1

through 4-3. The probe can be measured by two single-ended or differential

analog input channels.

When measuring the HMP45C with single-ended

measurements, the purple or 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 4 mA flowing into analog ground,

switch the sensor on/off for its own measurement.

CAUTION

TABLE 4-1. Connections for Single-Ended Measurements

Color

Description

CR10X

CR1000,

CR3000,

CR800,

CR5000,

CR23X

CR10,

CR510,

CR500

21X, CR7

Yellow Temperature

Signal

Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

Blue Relative Humidity

Signal

Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

Single-Ended

Input

White Signal Reference AG

Black Power Ground AG

Shield Shield G

Red Power

Continuous/Switched

SW12V SW12V 12V/SW12V* 12V/SW12V*

CR10X Power Control

if using SW12V

channel on datalogger

Jumper from

SW12V Control to

Control Port

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 23 24

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Vaisala HUMICAP HMP41 Spécifications Page 9

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