The Whessoe 1642 Temperature Element Selector allows individual selection of up to 15 elements in an multi element averaging thermometer. The unit also allows up to 32 individual 4 wire spot elements to be connected. Temperature measurement is factory calibrated - reducing installation time. The unit provides an accuracy of ±0.1°C with a resolution of ±0.025 °C as standard.

Technical specification:

Operation/Installation

Installation: Marine Cargo Tanks

Flange: 1½" 150lbs (Deck Nozzle)

Thread: 1½" API

Thermowell: 1½" NB pipe

Performance

Accuracy of Thermometer: ±0.35°C @ ±100°C

Approvals

Safety: For use in intrinsically safe circuits. B.S. 5501 part 7 EExia IIC T6. Baseefa Cert. no. BAS Ex. 842103.

Type Approval: To the requirements of Lloyds Register of Shipping

Environmental Standards

Ingress Protection: I.P. 65

Operating temp.: -25°C to 70°C

Materials of Construction

Electrical Enclosure: Cast iron

Net Weight: 9.2kg (approx)

Dimensions

170mm x 175mm x 130mm (approx)

Features & Benefits:

The circuit is an intrinsically safe design with a 4 wire thermometer connection, themometers being of the 100Ω PRT type. The elements are enclosed in a stainless steel sheath, attached to mineral insulated stainless steel clad cable. Provision for up to 4 individual 4 wire spot elements is provided.

Temperature data is transmitted along the same data loop as level and alarms to the fig. 1097 receiver via the fig. 1760. Average or upper and lower temperature values/alarms are provided via the fig. 1097 and Marine Fluid Management System.

The differential pressure transmitter is ideally suited for use of sea water cooling pumps where environments are chemically and mechanically extreme.

The pressure sensors measure even the smallest variations in pressures, they can be installed on side tanks or pipelines throughout the Engine or Ballast Rooms.

Technical Features:

• Linearity better than 0.1 % of set span
• Long-term drift better than 0.1 % per year or 0.25 % per 5 years
• Replaceable display
• Simple and easy operation via 4...20 mA and intelligent data protocol (HART )
• Zero and span freely adjustable with or without referential pressure
• Self-monitoring from sensor to electronics
• Wide variety of software functions such as characteristic curves, diagnostic codes, etc.
• EEx ia IIC T4/T6 Standard

Operation:
The Differential Pressure Transmitter can be operated in the following ways:

• Using the four keys on the instrument directly for calibrating zero point and span at the touch of a button. The differential pressure for 4 mA and 20 mA output can either be adopted directly from the system pressure or else calibrated without reference pressure.
• or remotely via a PC using intelligent HART protocols
• or using handheld terminals

Performance:
Linearity including hysteresis and repeatability based on the limit point method to IEC 770 to TD 10:1: ±0.1% of the set span , for TD 10:1 to 20:1: ±0.1% of the set span x TD/10