RBRcoda³ T

The RBRcoda³ T and RBRcoda³ T | deep use the same thermistor-type temperature sensor. The thermistor on the RBRcoda³ T | slow | deep is embedded, making the sensor extremely robust and deployable in the most challenging environments, such as boreholes and industrial settings. Fig. 3 illustrates the three models.

coda t slow
Fig. 3.    RBRcoda³ T, RBRcoda³ T | deep, and RBRcoda³ T | slow | deep with embedded thermistor

Temperature

Parameter Value

Range1

-5°C to 35°C

Initial accuracy

±0.002°C

Resolution

<0.00005°C

Typical stability

±0.002°C / year

Time constant

<0.1s | fast, <1s standard, <15s | slow

1A wider temperature range is available upon request. Contact RBR for more information

Physical

Parameter Value

Connector

MCBH-6-MP

Communications

RS-232

Housing

Plastic or titanium

Diameter

25mm

Length

~210mm (~245mm with connector)
~195mm (~230mm with connector) | slow | deep

Weight

160g in air, 60g in water (plastic)
390g in air, 280g in water (Ti)

Depth rating

Up to 1700m (plastic)
Up to 6000m (Ti)

Sampling rate

1Hz | slow, 2Hz standard
8Hz | fast8, 16Hz | fast16, 32Hz | fast32

Power

Parameter Value

Supply voltage

6V to 18V (12V nominal)

Power

10mA (120mW)

Calibration equations

Temperature

\[T_m=\ln\left(\left(\frac{1}{V}\right)-1\right)\]
\[T_c=\frac{1}{(C_0+C_1T_m+C_2T^2_m+C_3T^3_m)}-273.15\]

where:

\(T_m\)= Intermediate variables

\(V\) = Raw temperature channel voltage ratio output (unique with each individual measurement)

\(C_0\)= Cubic function regression calibration coefficient

\(C_1\)= Cubic function regression calibration coefficient

\(C_2\) = Cubic function regression calibration coefficient

\(C_3\) = Cubic function regression calibration coefficient

\(T_c\) = Temperature in celsius