Campbell-scientific HMP45C Temperature and RH Probe Instrukcja Użytkownika Pobierz pdf (Strona 11)

Model HMP45C Temperature and Relative Humidity Probe

The temperature and relative humidity signals from the HMP45C can be

measured using a single-ended analog measurement or a differential analog

measurement.

Use a single-ended analog measurement when the HMP45C signal lead length

is less than 6.1 m (20 ft.) or if the probe will be turned on and off under

datalogger control between measurements. For lead lengths greater than 6.1 m

(20 ft.) or when the probe will be continuously powered, use a differential

analog measurement. For a discussion on errors caused by long lead lengths

see Section 6.

The HMP45C output scale is 0 to 1000 millivolts for the temperature range of

-40°C to +60°C and for the relative humidity range of 0 to 100%. Tables 5-1

and 5-2 provide calibration information for temperature and relative humidity.

TABLE 5-1. Calibration for Temperature

Units

Multiplier

(degrees mV

-1

)

Offset

(degrees)

Celsius 0.1 -40

Fahrenheit 0.18 -40

TABLE 5-2. Calibration for Relative Humidity

Units

Multiplier

(% mV

-1

)

Offset

(%)

Percent 0.1 0

Fraction 0.001 0

TABLE 5-3. Wiring for Single-ended

Measurement Examples

Color Description CR1000 CR10(X)

Yellow Temperature SE 2 (1L) SE 3 (2H)

Blue Relative Humidity SE 1 (1H) SE 4 (2L)

White Signal Reference

Jumper from

SW12V Control

Red Power SW12V SW12 V

Black Power Ground

Clear Shield

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 23 24

Komentarze do niniejszej Instrukcji

Brak uwag

Campbell-scientific HMP45C Temperature and RH Probe Instrukcja Użytkownika Strona 11

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Urządzenia pomiarowe Campbell-scientific HMP45C Temperature and RH Probe