User manual ROTOTHERM DIGIGAUGE DIGITAL PRESSURE GAUGE

[. . . ] Ambient temperature : Temperature induced errors will be minimised if the gauge can be operated close to the calibration temperature of 20ºC (68ºF). Fittings and hardware : To allow the gauge to be removed easily for servicing and calibration it is recommended that a service valve is placed in the pressure line immediately before the DigiGauge. This service valve, together with other fittings and hardware should be of an appropriate pressure rating. If pressure surges are likely to occur it is advisable to fit a pressure limiting device such as a snubber. [. . . ] When entering a value, the currently stored value is recalled from memory and written to the display. Entering the setup mode Hold down the UP and DOWN pushbuttons (SW7 and SW5) for approximately 5 seconds, the gauge will then enter the setup mode which will be confirmed by the display message SET UP. The pushbuttons should then be released. The SET UP message will be replaced by the following menu:- FS - CLr. Z - CLr. L - End. Press UP (SW7) to advance through the menu. When the required function is displayed, press ENTER (SW6) to select it. The various functions are described below. FS : Set the full-scale pressure range The full-scale pressure range is equal to that of the pressure sensor. It is set during manufacture and should not be changed in normal operation. CLr. Z 1. 4. : Clear the display zero value Using the UP pushbutton switch (SW7) scroll through the setup menu until the display shows CLr. Z Move DIL switch SW4 to its 'ON' position Press the ENTER pushbutton (SW6). The display will show the message donE which indicates that the zero value has now been cleared from the gauge. Return DIL switch SW4 to its 'OFF' position. : Clear the linearisation value CLr. L 1. 4. Using the UP pushbutton switch (SW7) scroll through the setup menu until the display shows CLr. L Move DIL switch SW3 to its 'ON' position Press the ENTER pushbutton (SW6). The display will show the message donE which indicates that the linearisation value has now been cleared from the gauge. Return DIL switch SW3 to its 'OFF' position. : End setup End Terminates the setup mode of operation and restarts the gauge in the normal measurement mode. DigiGauge Digital Pressure Gauge Instruction Manual Page 4 Calibration Each DigiGauge instrument is fully calibrated during manufacture and certificates of calibration may be requested at time of ordering. It is recommended that the calibration of the gauge should be checked against a known standard every 12 months or at intervals specified by relevant quality assurance procedures. British Rototherm offers a rapid in-house recalibration service for its pressure measurement products, traceable to national standards. Please contact the Sales Office for details. Note that calibration is made easier by operating the gauge at the 0. 5 second update rate which allows adjustments to be made more quickly. To zero the gauge 1. Ensure that there is no pressure applied to the gauge. Some versions of the DigiGauge may be fitted with an optional multiturn potentiometer for zero adjustment. If the zero potentiometer is fitted (marked ZERO on the printed circuit board) turn the adjustment screw until the display shows a reading of 0000. [. . . ] Return DIL switch SW3 to the OFF position and SW1 & SW2 to their original positions. The compound gauge is now correctly linearised. DigiGauge Digital Pressure Gauge Instruction Manual Page 5 Warranty The Rototherm Digital Pressure Gauge 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. This warranty excludes the battery, damage due to battery leakage, misuse of the gauge or sensor damage caused by the application of excess pressure. [. . . ]