Product manual

Model HC2S3 Temperature and Relative Humidity Probe

The black outer jacket of the cable is Santoprene

rubber.

This compound was chosen for its resistance to

temperature extremes, moisture, and UV degradation.

However, this jacket will support combustion in air. It is

rated as slow burning when tested according to U.L. 94

H.B. and will pass FMVSS302. Local fire codes may

preclude its use inside buildings.

CAUTION

2.3 Default Settings and Digital Interface

Please refer to Appendices.

3. Installation

3.1 Siting

Sensors should be located over an open level area at least 9 m (EPA) in

diameter. The surface should be covered by short grass, or where grass does

not grow, the natural earth surface. Sensors should be located at a distance of

at least four times the height of any nearby obstruction, and at least 30 m

(EPA) from large paved areas. Sensors should be housed in a suitable

radiation shield.

Standard measurement heights:

1.5 m ±1.0 m (AASC)

1.25 – 2.0 m (WMO)

2.0 m (EPA)

2.0 m and 10.0 m temperature difference (EPA)

See Section 10 for a list of references that discuss temperature and relative

humidity sensors.

3.2 Assembly and Mounting

Tools Required:

• 1/2” open end wrench

• small screw driver provided with datalogger

• UV resistant cable ties

• small pair of diagonal-cutting pliers

The HC2S3 probe and its calibration card are shipped in a small box, with the

box and PN 27731 Hex Plug attached to the cable. PN 27731 is used to mount

the probe inside the 41003-5 Radiation Shield as described below.

Attach the probe to the cable by aligning the keyed connectors, pushing the

connectors together and tightening the knurled ring.

When exposed to solar radiation the probe must be housed in a radiation shield

such as the 41003-5 naturally aspirated shield, or the 43502 motor aspiration