Specifications

Instrument

Specification Description

Storage

240 million readings

Power

8 AA-type cells

External power

4.5 to 30V

Communications

Internal: USB-C; external: USB and RS-232/RS-485

Clock drift

±60 seconds/year

Depth rating

Up to 260m

Housing

Plastic

Diameter

100mm

Length

~510mm (with standard end-cap)
~570mm (with connectorised end-cap)
~500mm (with right-angle connectorised end-cap)

Weight (with batteries)

2.3kg in air, -0.25kg in water

Temperature

Specification Description

Range

-5 to 35°C *

Initial accuracy

±0.002°C

Resolution

0.00005°C

Typical stability

±0.002°C/year

Time constant

<30s (embedded)

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

Pressure

Specification Description

Range

20 / 55 / 125 / 190 / 260dbar

Initial accuracy

±0.01% full scale

Resolution

100ppb (at 1Hz sampling rate)

Accelerometer

Specification Description

Range

±3g

Resolution

<100ng

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.

Deployment estimates (with lithium thionyl chloride cells)

Speed Burst samples Interval Time # of samples

16Hz

-

Continuous

~61 days

~84 million

4Hz

4096

120min

~422 days

~21 million

1s

60

30min

~2.1 years

~2.4 million

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+)