Specifications

Instrument

Specification Description

Maximum number of readings1

~240 million

Power

Internal: 8 AA cells (for backup power only)
External: 9.5V to 30V

Communications

Internal: USB-C
External: RS-232, RS-485, or Ethernet

Clock drift

±60 second/year

Depth rating

7000m

Housing

Titanium

Diameter

~140mm

Length

~788mm

Weight (single Paroscientific unit, with batteries)

30Kg in air, 18Kg in water

1 Each sample can include multiple readings.

Temperature sensor

Specification Description

Range

-5 to 35°C1

Initial accuracy

±0.002°C

Resolution

0.00005°C

Typical stability

±0.002°C/year

Time constant

~3min

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

Pressure sensor

Specification Description

Range1

1000 / 2000 / 4000 / 7000dbar

Initial accuracy

±0.01% full scale

Resolution2

10ppb (at 1Hz sampling rate)

1 Exceeding the absolute maximum pressure will damage the instrument.
2 Based on an integration time of ~750ms.

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. The internal batteries are sufficient to maintain sensor operation without the switching valve. The external power supply and cables shall support inrush currents of up to 4A at 24V input, for proper valve operation.

External power with voltage of 9.5V or higher is required to operate the switching valve.

Clock

The instrument’s clock is maintained during brief disconnections. This time is usually sufficient to change batteries.

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

Deployment times are estimated for lithium thionyl chloride batteries based on both memory and internal battery capacity.

Internal LTC batteries only

(no valve operation)

RBRfermata with LTC batteries

(with the valve activated every 20 days)

Speed

Time (days)

Number of samples

Time (days)

Number of samples

8Hz

34

23M

77

45M

4Hz

34

12M

152

45M

2Hz

34

6M

305

45M

1Hz

34

3M

611

45M

External MCBH-6-MP connector pinout

screen shot 2019 04 26 at 3 06 03 pm

Pin No.

USB

RS-232

RS-485 or Ethernet

1

Ground

Ground

Ground

2

Power 9.5V to 30V

Power 9.5V to 30V

Power 9.5V to 30V

3

N/C

From the instrument (Tx)

From the instrument (Tx-)

4

VUSB +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+)

External MINK-10-FCR connector pinout

image2020 11 12 12 18 12

Pin No.

RS-232

RS-485

Ethernet

1

Power 9.5V to 30V

Power 9.5V to 30V

Power 9.5V to 30V

2

N/C

From the instrument (Rx-)

From the instrument (Tx+)

3

N/C

N/C

Into the instrument (Rx+)

4

From the instrument (Tx)

Into the instrument (Rx+)

From the instrument (Tx-)

5

Ground

Ground

Ground

6

Into the instrument (Rx)

From the instrument (Tx+)

N/C

7

N/C

N/C

Into the instrument (Rx-)

8

N/C

N/C

N/C

9

N/C

Into the instrument (Tx-)

N/C

10

Ground

Ground

Ground