Campbell Scientific 107 107-L Temperature Probe - Page 11

Model 107 Temperature Probe

Edlog Temp (107) (P11)

Polynomial

Linearization Error:

<

±

0.1 °C (–24 to 48 °C)

<

±

0.5 °C (–35 to 50 °C)

FIGURE 6-1.

Linearization error, where error is the difference between

actual and datalogger computed temperature.

1

The overall probe accuracy is a combination of the thermistor interchangeability specification, the

precision of the bridge resistors, and the error of the Steinhart-Hart equation used in CRBasic

instruction

Therm107()

(CRBasic dataloggers), or the error of the polynomial fit used in Edlog

instruction

Temp (107) (P11)

(Edlog dataloggers).

The major error component is the

interchangeability specification of the thermistor.

For the range of 0 to 50 °C, the

interchangeability error is predominantly offset and can be determined with a single point

calibration.

The offset can be entered in the measurement instruction

Offset

parameter.

Bridge

resistors have 0.1% tolerance with a 10 ppm temperature coefficient.

Probe Length:

10.4 cm (4.1 in)

Probe Diameter:

0.762 cm (0.3 in)

Weight with 10 ft Cable:

136 g (5 oz)

7.

Installation

If you are programming your datalogger with

Short Cut

, skip Section 7.1,

Wiring to Datalogger

, and Section 7.2,

Datalogger Programming

.

Short Cut

does this work for you.

See Section 4,

Quickstart

, for a

Short Cut

tutorial.

5