User manual ROTOTHERM DIGIGAUGE TRANSMITTING VERSION

[. . . ] It is recommended that the immersion length should be at least three times the length of the sensitive portion of the stem. Process conditions and thermowells : Ensure that the stem material of the DigiTemp (generally stainless steel, 316 grade) is compatible with any chemically aggressive medium that it may come into contact with. If the process medium is under pressure (3. 5 bar or greater), for safety reasons the stem of the DigiTemp should be protected by a thermowell ('pocket') designed to suit the process conditions. A wide range of thermowells are available from British Rototherm, please contact the Sales Office for advice. Display units The display reading may be given in degrees Celsius or Fahrenheit according to the position of the internal jumper which is shown in Figure 3. [. . . ] Dials marked with either °C or °F are available, part numbers DT0039-C (°C) and DT0040-C (°F). Over and under-range indications Should the measured temperature lie below or above the range of the DigiTemp the display will read either Undr or OvEr. The temperature range of the instrument is shown on the label attached to the top of the case. DigiTemp Digital Thermometer Instruction Manual R Page 2 Battery replacement The instrument is powered by two alkaline manganese 1. 5 volt cells, type LR6 (AA). When these are due for replacement the display will alternate between the temperature reading and message bAtt. This warning will be given when the battery voltage falls to 2. 0 volts (1. 0 volt per cell), at which point the battery has approximately two months' life remaining. An internal voltage regulator circuit maintains measurement accuracy until the battery voltage falls to approximately 1. 5 volts. Always replace the cells in pairs, do not mix old and new cells. To replace the battery unscrew the front bezel ring and remove the window and sealing gasket. Remove the two nylon-headed screws and lift off the dial. Remove the old cells and fit two "AA" size 1. 5V alkaline manganese cells into the battery holder. The correct polarity of the cells is shown in Figure 2 below and is also marked on the battery holder. Refit the bezel ring tightly with firm hand pressure. Observe correct safety procedures when working with high temperature calibration baths. CAUTION! Figure 3 - Internal view of case showing calibration trimmers and °C / °F selection jumpers Minimum and maximum reading option The Digitemp may be fitted with an option which stores the maximum and minimum measured temperatures. These temperatures may be displayed or cleared by means of magnetically-operated switches without opening the sealed case. To display the minimum and maximum temperatures : Place a bar magnet on the top right-hand side of the case within the box marked Min - Max on the instrument label. The DigiTemp display will then alternate between the maximum and minimum values as long as the magnet is held in place. The maximum temperature is shown after the display message Hi and the minimum value follows Lo. To reset (clear) the minimum and maximum values : Place a bar magnet on the top left-hand side of the case within the box marked Min-Max Clear on the instrument label. After approximately 5 seconds the minimum and maximum values will be cleared, confirmed by the display message HiLo CLrd. Note that the minimum and maximum readings will also be cleared if the battery is removed. Warranty The Rototherm DigiTemp thermometer is guaranteed to be free of manufacturing defects for a period of one year from the date of purchase. To obtain service under this warranty the instrument should be returned in its original packaging either to British Rototherm or its distributors. [. . . ] To obtain service under this warranty the instrument should be returned in its original packaging either to British Rototherm or its distributors. This warranty excludes the battery, damage due to battery leakage or misuse. Any details given in this instruction sheet are subject to change without notice. DigiTemp Digital Thermometer Instruction Manual R Page 4 Specifications Sensor: Measurement ranges: Platinum RTD or thermocouple (Type K class 1 as standard, others available to order) T/C: -100 to +1000°C (-148 to +1832°F) 1° resolution RTD: -50 to +200°C (-58 to +392°F) 0. 1° resolution (Specific temperature range is dependent on sensor & stem construction) T/C: ±1°C ± 1 digit RTD: ±0. 2°C ± 1 digit T/C: RTD: Zero Span Zero Span : : : : ±0. 05°C per °C ambient change ±0. 01% of span per °C ambient change ±0. 005°C per °C ambient change ±0. 003% of span per °C ambient change Accuracy: Stability: (Figures for T/C variant include CJ compensation) Sensor linearisation: Cold junction compensation : Display: Update interval: Temperature Limits: Automatic, via software. Automatic (T/C only). 4 digit LCD with 12. 7mm (1/2") high characters. [. . . ]