• Pressure Recorders
• Temperature Recorders
• Compound Recorder
• Rotrac CCR 398A Recorder

Description:
The Forbesons 250 mm circular chart recorders are used for recording variations in pressure in any process control industry.

As the pressure rises, it deflects the bourdon tube fitted inside the instrument. This movement of the bourdon is carried by mechanical linkage to the pen arm which is rotated at a constant speed by a mechanical or electrical clock of the required time period, Forbesons Pressure Recorders can be manufactured with single or double pen arrangements and are driven either by a mechanical or electrical chart drive. The mechanical chart drive is recommended for hazardous applications. These recorders can also be provided with electrical contacts.

Each Pressure Recorder is individually calibrated to ensure the guaranteed accuracy of ± 1 %

(-20) -80 deg. C
0 to 120 deg. C
0 to 150 deg. C
0 to 200 deg. C
0 to 270 deg. C
0 to 300 deg. C
0 to 350 deg. C
0 to 400 deg. C

Working Principle: As the temperature / Pressure rises it deflects the sensing elements. The movement at the end of the sensing element is carried by mechanical linkage to the pen arm which records the temperature arm does not rotate against time.

With MOC
Bourdon	SS 316
Stem	Brass/SS 316
Movement	Brass/SS 304
Casing	Sheet metal / Cast Al / S.S.

 

Chart	size 250 mm Circular
Accuracy	± 1% full Scale
Mounting	Wall or Panel
Process Connection	3/4” BSP (M) Standard (Temperature) 3/8” BSP (M) Standard (Pressure)
Case	Sheet Steel / Aluminum – Weather proof
Window	Toughened Glass
Chart Drive	Mechanical / Electrical / Quartz
Rotation	Mechanical-24 hrs. (std.) / Electrical-24 hrs. (std.) / Quartz-24 hrs. (std.)
No. of pens	Double pen (One for Pressure and One for Temperature)
Type	Disposable
Sensing Element	Chrome Molybdenum dia. 14.3 mm O.D. (standard) (Bulb) Stainless Steel 4.8 mm O.D (optional), PVC covered (optional for all)
Capillary Length	4 mtrs. (standard) available upto 30 mtrs. Max. (Temperature)
Limit of Over Temp.	20% of span
Contacts	Minimum or Maximum (single)
Rating	15 mA at 230 VAC 50 Hz non inductive load (std.)

Working Principle: The Rotrac CCR 398 A circular chart recorder is a panel mountable instrument which can record a wide number of process parameters. It offers either 1 or 2 channels, with LED displays for both.

With MOC
Bourdon	SS 316
Stem	Brass/SS 316
Movement	Brass/SS 304
Casing	Sheet metal / Cast Al / S.S.

Input Options (With input card)

Input type Sensor Range*

Thermocouples Type K Cr/Al 0-200 0 C

0-500 0 C

Type J Fe/CON 0-200 0 C

0-500 0 C

RTD 3 Wire pt-100 0-200 0 C

0-500 0 C

DC mV 0-5 mV

0-200 mV

DC V 0-5 V

0-40 V

DC mA 0-1 mA

Input impedance>1M for mV/mA/TC 0-5 mA'

Cold Junction compensation + - 0.1 0 C/ 0 C 0-10 mA

Basic Input Options (Without input card)

Input Range Impedeance

DC current 4-20 mA <100 Ohms

0-20 mA <100 Ohms

0-50 mA <100 Ohms

10-50 mA <100 Ohms

DC current 0-5 V >2.2M Ohms

0-2 V >2.2M Ohms

1-5 V >2.2M Ohms

Recording

Chart Drive Sychronous motor

Chart Drive Revolution/Day-RPD

Revolution/Week-RPW

Chart Diameter 253 mm

Visible Chart Areas Complete

Pen Color Ch 1: Green Ch 2: Red

Pen Speed 1 FSD/ 5 Sec Approx.

Recording Capacity 150 Mts. Of recording

Separation btwn Channels 1 Hr. on time scale

Display Options

31/2 Digit 12.5 mm LED displays Engineering Units

Channel-1, Recording Colour: Green

Channel-2, Recording Colour: Red

Accuracy of Recording & Display

Accuracy 0.5% of Span

Dead band ± 0.25% of Span

Linearity Better than 0.5% of span

Linearity of feedback Better than 0.3% of Span

Power Consumption

Without Display –22 VA

Power Supply

230 V or 115 V (+10% - 15%) 50Hz Single Phase AC

Output Options

Transmitter Power Supply 24 V DC 50 mA

Retransmission DC Current 4-20 mA

0-20 mA

Environmental Specification

Operating Temp. 0-50 0 C

Storage Temp. 0-80 0 C

Operating humidity Up to 95% RH, NC-40 0 C

Environmental Protection Dust proof Design to IP 54

Physical Dimension

Bezel size 412 x 378 mm

Panel Cutout size 335 x 335 sq. mm

Depth behind panel 102 mm

Enclosure Material CRCA 14 SWG