C7770A Air Temperature Sensor. CSI 3-Part Specifications.

C7770A Air Temperature Sensor

GENERAL

The C7770A Air Temperature Sensor is a direct wired temperature sensor that is used to sense discharge or return air in a duct that may be controlled by an Excel 10 Controller. The C7770A Sensor contains a temperature sensitive 20K ohm NTC nonlinearized thermistor.

DESCRIPTION

The C7770A Air Temperature Sensor is a direct wired temperature sensor that is used to sense discharge or return air in a duct that may be controlled by an Excel 10 Controller. The C7770A Sensor contains a temperature sensitive 20K ohm NTC nonlinearized thermistor.

SPECIFICATIONS

Model:

C7770A Air Temperature Sensor.

Operating Range

45 to 99°F (7.2 to 37.2°C).

Temperature Sensor Accuracy:

The C7770A is furnished with a 20K ohm nonlinear NTC temperature sensor that follows a specific  temperature-resistance curve. See Fig. 1. Honeywell controllers used with the C7770A employ an algorithm that provides readings close to the actual temperature. Table 2 summarizes the C7770A nonlinearized sensor accuracy for normal operating temperatures. Across the range of 41 to 99°F (5 to 37°C) the accuracy is better than ±0.75°F (±0.42°C).

 

  

Input Rating:

0.5 mA pulsed constant current.

Mounting Options:

Mounts on flat duct or plenum surface or, for a plenum-rated applications, in a standard utility conduit box.

Dimensions:

Probe Length(including mechanical strain relief): 6-1/2 in. (165 mm).

Probe Diameter: 3/8 in. (13 mm). Mechanical strain relief on the flange end of probe is 1/2 in. (13 mm) diameter.

Flange Height: 7/8 in. (22 mm).

Flange Width: 2 in. (51 mm).

Environmental Ratings:

Operating Temperature: 45° to 99°F (7.2° to 37.2°C).

Shipping Temperature: 40° to 150°F (-40° to 65°C).

Relative Humidity: 5% to 95% noncondensing.

Vibration: V2 level.

Corrosion: Office environment.

Approvals:

NEC Class II.