670B Electronics/Display Unit

The 670B Display Unit has a front

panel that allows for full control

of all the instrument’s features.

All functions can be monitored

and controlled via the RS-232

or IEEE-488 interface. Range

switching may be done manually

or automatically with the 670B,

selecting the lowest possible on-scale range. A key-lock

switch on the front panel determines Local or Remote

control. The 670B may be used with any sensor Full Scale

and will display pressure in any one of 12 engineering

units. Sensor response time may be set for 1, 40, or 400

msec, and a data averaging feature allows the user to

average signals from 0.1 to 10 seconds, to optimize the

pressure readings for transients or noisy pressures.

Compatible Sensors & ranges

690 and 698 from 0.1 to 25,000 mmHg (Torr) F.S.

display

2-line LCD, readings updated twice/second

Resolution

3½, 4½, or 5½ digits, user-selectable (Note: Useable system resolution depends

upon sensor choice and application.)

Engineering Units

Torr, mTorr, mmHg, mbar, Pa, kPa, inHg, inH

F.S. (All user-selectable)

ranges

x1, x0.1, x0.01 of sensor F.S., manual or auto-ranging

response Time

1, 40, or 400 msec, user-selectable

data Averaging

0.1 to 10 sec, user-selectable

Outputs

Analog

0 to ±10 VDC on each range into >10K

Ω load

Impedance

<1

Connectors

I/O: 37-pin female Type “D”, Remote signal: 9-pin male Type “D”

Digital

RS-232 Connector

9-pin male Type “D”

IEEE-488 Connector

24-pin female IEEE-488. 1 standard pin assignment.

Process Trip Point relays

Two, 24 VAC/DC @ 1 Amp resistive (contact ratings)

Two LEDs on front panel indicate status of each relay

Operating Temperature range

15° to 40° C

Power required

90-132 or 180-264 VAC, 50-60 Hz, 75 VA (max.) IEC-AC power line connector

Size

88 mm H x 240 mm W x 234 mm D (3.5” H x 9.5” W x 9.25” D)

670B Specifications

670B Features & Benefits

• Microprocessor-basedelectronicsunitprovidespower,

signal conditioning, and display for operating all High

Accuracy Baratron pressure sensors

• Analoganddigitalinput/outputsignalsfacilitate

interfacing to computers and process control systems

• Twobuilt-inalarmrelaysprovideprocesspressuretrip

points

D21

670B

670B Ordering Information

Ordering Code Example: 670Bxyz

Code

Configuration

670B Electronics/display Unit 670B

interface (xyz)

RS-232

D21

IEEE-488

D81