HERMetic Onecal Digital thermometer with one reference point for calibration. HERMetic Onecal stands for one reference point only for calibration. The reference point is the ice point which can easily be reproduced. The calibration is done by simply pushing a button. The characteristics of the RTD sensor are stored in the memory of the instrument and are the same for any individual sensor. Therefore a change of a sensor requires only an offset calibration. Replacing the cable only does not require a new calibration because of the built-in automatic cable compensation routine. The HERMetic Onecal is designed for use in hazardous environments with outstanding characteristics regarding safety, ease of operation, accuracy, reliability and cost efficient maintenance. HERMetic Onecal: Intrinsically safe portable digital thermometer Up to 9 individual values can be stored in the memory. An automatic average of the stored values can be achieved by entering the calculation menu. The ergonomic and rugged design of the housing allows for an easy and safe cable storage. The cable guides keeps the cable secured at all times. By counting the number of cable loops the fed cable length can be determined. • 1 cable loop = 2 feet, 3 cable loops = 2 metres. • Application Temperature measurement represents an important part in tank gauging since the density of petroleum products changes approximately by 0.1 % per degree Celsius. An error in the observed temperature will result in an error of the correction factor, which is used to calculate the standard volume. This electronic thermometer has been designed for field inspection of custody transfer of bulk liquids and meets all relevant standards in the industry. • Ambient temperature drift SCS Surroundings Compensation System In most cases, a Portable Electronic Thermometer (PET) will be checked or calibrated at room temperature ambient conditions, i.e. around +20°C (+68°F), although they can work in a wide range of operational ambient temperatures. From areas such as Alaska to equatorial climates, these conditions can vary over a range of around 100°C (180°F). This difference can result in another form of drift error. The new concept named “SCS Surroundings Compensation System” (Registered) of the Onecal incorporates an internal reference that is constant and does not depend on the ambient temperature over a wide operational range, i.e. from -20°C (-4°F) to +60°C (+96°F). This means, the accuracy of the measurements made with the Onecal is unaffected by the ambient temperature, and this error is avoided. * Option Load 300 gr. * Option Fully-cushioned carrying box This special box protects against any damage during storage and daily use. • Re-calibration when exchanging the PET cable CRC Cable Resistance Compensation A traditional PET needs to be re-calibrated each time the cable is renewed, as the intrinsic resistance of the cable is incorporated in the temperature measurement sequence and any change in its value can affect the accuracy of reading, unless the unit is properly re-calibrated. The new concept named “CRC Cable Resistance Compensation” (Registered) of the Onecal measures the actual resistance of the cable every time the PET is used, and compensates for any change to eliminate this source of error. Changing the cable, whatever length it has, will not affect the accuracy of the thermometer and therefore does not require a re-calibration in a laboratory. With: • Response time This thermometer has a response time (time to achieve 90% of the final temperature) of 15 seconds in water and 35 seconds in lubrication oil under dynamic conditions. Cable replacement without needs of new calibration • Maintenance This instrument has been designed for users which require a high precision thermometer that is always ready to operate. Users can change the cable, the sensor or the display unit, and recalibrate it without the need of special tools or training. The unit cannot be calibrated incorrectly. The modular design of the HERMetic makes the exchange of components extremely easy and cost efficient as no special training or tools are required. HERMetic Onecal without frame, 2 m (7 ft) cable The HERMetic Onecal can also be used in laboratories for verification of existing temperature measuring equipment. The high accuracy of this thermometer allows a reliable temperature reading. The HERMetic Onecal can be supplied without frame and with a 2 m (7 ft) cable. This type of unit can very well be used for temperature verification anywhere in a laboratory or on a railtrain tank if the opening is bigger than 16 mm (5/8") in order to allow the penetration of the sensor. Technical specifications: Measurement range: -40°C to 163°C (-40°F to 325°F) Sensor temperature range: -40°C to 200°C (-40°F to 392°F) Ambient temperature range: -20°C to 40°C (-4°F to 104°F) Resolution: 0.1° or 0.01° selectable Temperature scale: °C or °F selectable Temperature accuracy: -40°C to -30°C (-40°F to -22°F) ± 0.25°C (± 0.4°F) -30°C to 100°C (-22°F to 212°F) ± 0.1°C (± 0.2°F) 100°C to 163°C (212°F to 325°F) ± 0.25°C (± 0.4°F) Repeatability: exceeds API MPMS Chapter 7 -40°C to 163°C (-40°F to 325°F) ± 0.1°C (± 0.2°F) Calibration: Digital, one point only 0°C (32°F) Memory: up to 9 individuals Display: LCD 8 digits, 10 mm character height Power: Approved 9 Volt battery Battery saving: aut. shut off /10 minutes after last action Battery life: Approximately 100 hours Low battery indication: On LCD display Overall dim. length x width x depth: 336 x 202 x 94 mm (13.2 x 8 x 3.7 inches) Weight with 22.8 m (75 ft) cable: < 1.4 kg (< 3 lbs) Probe size: diameter: 16 mm (5/8"); length: 150 mm (6") Probe material: Stainless steel 1.4435 Cable length: 2 m (7.6 ft), 15.2 m (50 ft), 22.8 m (75 ft), 33.5 m (110 ft) Cable material: FEP Teflon jacket Instrument protection: IP 54 Frame material: Antistatic Polyamide base Electronic box material: Coated aluminium Temperature sensor: PT 1000 element Hazardous environment Approvals: ATEX II 1 G Ex ia IIB T4 Ga FM Approvals CL I, DIV 1, C&D, T4 and CL I, ZN 0, AEx ia IIB T4 IECEx Ex ia IIB T4 Ga ChinaNEPSI Ex ia IIB T4 GA Russia 0 Ex ia IIB T4 X Metrology approval: Germany China Russia PTB, portable electronic thermometer Pattern approval Pattern approval The information contained in this document is subject to changes without notice Honeywell Enraf Tanksystem SA Rue de l’Industrie 2 1630 Bulle, Switzerland Tel: +41 (0) 26 919 15 00 Fax: +41 (0) 26 919 15 05 E-mail: email@example.com www.tanksystem.com HM-13-11-ENG February 2013 © 2013 Honeywell International Inc.