Physical specifications

Instrument

Specification Description

Max number of readings

240 million

Power

8 AA-type cells (alkaline or lithium iron)1

External power

4.5 to 30V

Communications

Internal: USB-C
External: USB and RS-232 / RS-485

Clock drift

±60 seconds/year

Housing

Plastic

Diameter

63.3mm housing, 100mm guard

Length

470mm

Weight

~1.7kg in air, ~0.25kg in water

Depth rating

Up to 200m

Sampling rate

1min or 30s

1 Internal batteries are used only as a backup during power interruptions. See Ruskin User Guide: Standard Instruments³ for suitable battery chemistries.

RBR recommends using an external power supply with the RBRduo³ C.T | uv and RBRconcerto³ C.T.D | uv.
Instruments with active antifouling tend to consume more power than a regular RBRduo³ or RBRconcerto³ and thus will quickly drain the batteries if the instrument is not connected to an external power source.

Antifouling

Parameter Value

Illumination type

UV-C light (275nm)

Peak power consumption

3.0W (250mA at 12V), low power level
3.6W (300mA at 12V), standard power level

Average power consumption

260mW (22mA at 12V), low power level
750mW (63mA at 12V), standard power level

UV interval

60s

Duty cycle

25% (15s)
rbrconcerto ctduv 8
Fig. 1.    RBRconcerto³ C.T.D | uv

Power supply selection

If connected, an external power supply will be used preferentially over the internal batteries as long as the voltage remains 4.5V or greater. If it drops below 4.5V or complete disconnection occurs, the system automatically switches to the internal batteries.

Clock

The instrument clock is maintained during brief disconnections. This time is usually sufficient to change batteries. If the clock is lost, the time will revert to January 2000. In this case, check the power supply and synchronise with the computer again.

USB-C power

The USB-C cable provides power sufficient for configuration or data download. However, the instrument requires an internal or external power supply to perform sampling.

External MCBH-6-MP connector pinout

screen shot 2019 04 26 at 3 06 03 pm

Pin No.

USB

RS-232

RS-485

1

Ground

2

Power +4.5 to +30V

3

N/C

From the
instrument (Tx)

From the
instrument (Tx-)

4

+5V

Into the
instrument (Rx)

Into the
instrument (Rx+)

5

D-

N/C

Into the
instrument (Rx-)

6

D+

N/C

From the
instrument (Tx+)

For deployment estimates specific for your instrument configuration and sampling options:

  • Go to Ruskin and click the "Instruments" tab

  • Select "Simulate an instrument…​", find your logger under "Standard instruments", and click "OK"

  • Adjust variable parameters under "Configuration" to match your needs

  • Ruskin autonomy engine will calculate the End date and indicate when your deployment is likely to stop

Note that RBR instruments with the antifouling system typically rely on the external power supply during deployments, so the only gating condition will be the memory.