Installation and Operating Instructions for General Purpose Digital
Contents
1. to select value display will briefly show DONE and return to Measurement Mode 2 Display will indicate FACT factory FIELD or NEW press AN QD to scroll 3 Pressing gt while FACT factory is displayed will restore values of factory Calibration 4 Pressing when FIELD is dis played will restore values from latest field Calibration 5 Pressing Enter key When NEW appears will enter the recalibrate mode 6 When NEW is displayed press a upon release the display will flash OK APPLY REF PSI THEN PRESS ENTER TO START OR OTHER TO ABORT Numeric display will read 00000 Vent sensor to atmospheric pressure press display will show WAIT and count down from 6 seconds then briefly display CAL then automaticly go to next Step 7 Display flashes APPLY REF PSI THEN PRESS ENTER TO START OR OTHER TO ABORT apply the full scale pressure in units of psi indicated in numeric display to gauge Press display will show WAIT and count down from 6 seconds then briefly display CAL then automati cally go to next step Note If Z Lock is activated the gauge will display ZLOCK if zero is attempted 8 10 Display flashes APPLY REF PSI THEN PRESS ENTER TO START OR OTHER TO ABORT apply the pressure indicated in numeric display to gauge and press display will show2. WAIT and count down from 6 seconds then briefly display GOOD then exit into measure ment mode or COMPOUND RANGE GAUGES ONLY RE QUIRE ONE ADDITIONAL CALIBRATION POINT NEAR VACUUM Display flashes APPLY REF PSI THEN PRESS ENTER TO START OR OTHER TO ABORT apply near vacuum of 14 000 psi as indicated in numeric display to gauge and press ua display will show WAIT and count down from 6 seconds then briefly display GOOD then exit into Measurement Mode Note Recalibration is allowed only if test parameters are within 7 If outside this window the display will indicate CAL FAIL INPUT PRES TOO LOW HIGH PRESS ENTER TO RETRY PRESS OTHER TO ABORT Note FIELD option appears only if gauge has been successfully field recalibrated Graph Provides the user the ability to modify pressure values dictating the minimum maximum indi cations over the 20 segment bar graph 1 In menu mode press A Gyr until GRAPH appears press 2 Display will indicate CGOFF custom graph off default CG ON custom graph on or NEWCG new custom graph press A w to scroll 3 To recall the last custom graph entered when CG ON is displayed press Display will briefly show DONE and return to Measurement Mode 4 Toreset bar graph to full scale range when CGOFF is displayed press gt Display will briefly show DONE and return to Measu
3. be lost Note The custom units feature is not avail able with compound pressure ranges Note The bar graph uses the factory default setting when custom units are used Note The magnitude of the value entered when using the custom units feature can significantly increase the noise on the dis play which can affect the zero and tare functions as well as the stability of the pres sure reading displayed If required consult factory for recommended limitations on full scale input Maximum Minimum Displays maximum minimum pressure values this is initiated upon powering the unit or since the values were cleared 1 When in menu mode press A v e to scroll to Max maximum display this is indicated in small font to the left of the display s unit of measure 2 To clear both Min and Max values press and hold o mami 3 Release of this key will leave you in Menu mode Use A v tO continue scrolling through the menu options OR hold D io retum to measurement mode Note Clearing Minimum Maximum values will reflect a blank display except for the associated Min Max icon and battery indicator Note The following actions will also clear min max values Power off zero gauge function tare function field cali bration function units programming update rate or reset Controls how long the gauge will remain pow ered ON once the Power key is pressed 1 When in menu mode press AN QD g
4. now read 0 Press a gt the TARE key ICON again to dis able the function The display will quickly flash T OFF then the TARE icon will disappear and the pressure reading will no longer be blinking The unit will now return to measure ment mode Programming To enter menu mode 1 Press Qo and release to proceed to programming mode 2 Press A v to scroll through pro grammable menu options 3 When desired option is reached press to access that parameter 4 fatany time you choose to EXIT the menu mode or sub menu mode hold Your work will not be saved Programmable Parameters Units of Measure 1 In Menu mode press A v to scroll to UNITS press gt 2 Choose engineering units by scrolling A until desired unit is dis played PSI BAR kg cm kPa mPa FtH50 InHg cmHG mmHg customer de fined units CUSTU 3 Press to select units and return to Measurement Mode Note Custom units programming see page 8 Custom Units of Measure Allows a user to define a custom unit of meas ure user must enter the full scale value of the desired reading which can be done as follows 1 In Menu Mode press A select CUSTU press usb 2 Select decimal point location The alphanumeric display shall show SELDP The first screen to appear will show all digits lit up as 5 and the rightmost decimal point will blink 5 5 5 5 5 unl
5. SASHCROFT Installation and Operating Instructions for General Purpose Digital Pressure Gauge Type DG25 eeooooor Software Version 1 00 00 Tel 44 0 191 490 1547 THORNE amp Fax 44 0 191 477 5371 DERRICK UK weste owes www thorneanderrick co uk A WARNING READ BEFORE INSTALLATION A 1 GENERAL A failure resulting in injury or damage may be caused by excessive overpressure excessive vibration or pressure pulsation excessive in strument temperature corrosion of the pres sure containing parts or other misuse Consult Ashcroft Inc Stratford Connecticut USA before installing if there are any ques tions or concerns 2 OVERPRESSURE Pressure spikes in excess of the rated over pressure capability of the gauge may cause irreversible electrical and or mechanical damage to the pressure measuring and con taining elements Fluid hammer and surges can destroy any pressure transducer and must always be avoided A pressure snubber should be installed to eliminate the damaging hammer effects Fluid hammer occurs when a liquid flow is suddenly stopped as with quick closing solenoid valves Surges occur when flow is suddenly begun as when a pump is turned on at full power or a valve is quickly opened PRESSURE SURGES Surges are particularly damaging to pressure gauges if the pipe is originally empty To avoid pressure surges fluid lines should remain full if possible pumps should be brough
6. ess the custom units feature had been used previously If it had been used the digits and decimal point po sition shall correspond to the last values set Use the A v gt keys to move the deci mal point to the left or the right Once the decimal point is in the desired position press to lock it in place When the key is released the display reads DIGIT 3 Choose full scale value The alpha numeric display shall show DIGIT The next screen will continue to show all digits as 5 with the leftmost digit blinking and the decimal point fixed in the previously chosen position However if the custom units feature has been used previously then the digits shall correspond to the last value The decimal point remains at the location chosen in step 1 Press A gt TO change the value of the digit between 0 9 Once the desired value is displayed press the button to lock it in place Now the next digit to the right will begin blinking Repeat this procedure for all 5 digits When the js pressed and released with the fifth digit flashing the gauge will briefly display DONE then return to measurement mode and display CUSTU along with the numeric readings to signify that the feature is use The user can optionally exit at any point before the enter key is pressed with gt f the user exits the menu by a before completing step 2 or there is a menu timeout then whatever the user entered will
7. inimum Pressure and Tare icons 5 5 character alpha numeric digit display 6 4 segment battery life indicator 7 Negative pressure indicator L ILI A Li LIL NA M Note Key presses designated as short less than 0 5 sec are indicated by gt ICON Key presses designated as long greater than 0 5 sec are indicated by ICON Turn the Gauge ON OFF Press key to turn instrument ON OFF When initially turned ON the display will momentarily show all LCD segments lit prod uct version and full scale range the unit will then proceed automatically to the Measure ment Mode ENTER Zero Function Press zero Upon release the numeric display momentarily disappears and ZERO shows in alpha display then returns to meas urement mode The pressure should now read 0 Zero value is stored in memory Note 1 A display message of RLOCK indi cates that zero is more than 5 from factory calibration Zeroing is not possible Note 2 A message of ZLOCK indicates that Zero lock function is activated Tare Function Subtracts current pressure value from value displayed in Measurement mode In Measurement mode apply desired pressure press gt to enable the tare function The display will quickly flash TARE then the TARE icon will be displayed and the pressure reading will blink The unit should
8. ns Proof Pressure Vac 2000psi 200 9e of Span 3000 5000psi 150 7500 25 000psi 120 69 36mm Q2 73in Burst Pressure Vac 2000psi 800 of Span 3000 5000psi 500 7500 25 000psi 300 Environmental Specifications Temperature 67mm Storage Batteries removed en 20 C to 80 C 4 F to 176 F Batteries installed 20 C to 60 C 4 F to 140 F Ambient Operating 20 C to 60 C 4 F to 140 F Process Media 40 9mm 20 C to 80 C 4 F to 176 F 1 61in 7 Agency Approvals CE EN 61326 1998 CE EN 61326 Annex A Heavy Industrial UL cUL 61010 1 pending RoHS compliant Tel 44 0 191 490 1547 THORNE amp Fax 44 0 191 477 5371 DERRICK UK vm www thorneanderrick co uk
9. r to save battery Feature Back light indicator will blink 10 sec onds prior to light shut off Update Utilized to select the rate at which the displayed pressure value is updated on the screen This function is used when rapid changes in pres sure cause flutter in the display values longer intervals will reduce the update rate and average the readings on such applications T In Menu mode press A gt until UPDAT appears Press to select Press A to select values for 1 SEC default 500 MSEC or 250 MSEC Press to select value display will briefly show DONE and return to Measurement Mode Note Changing value to anything other than 1 sec may cause a slight zero offset and it is recommended that the gauge be fully vented and re zeroed before taking accurate readings Also battery life will be reduced by use of an update rate faster than 1 SEC ENTER 10 Z Lock Re Calibration Utilized to prevent inadvertent re zeroing of the Provides the user the ability to field calibrate the instrument product Original factory calibration is perma 1 In Menu mode press A untij ently retained in memory and can be recalled at ZLOCK appears any time 5 Press vti sdiact 1 In menu mode press AN GY unti RECAL appears proceed to press D 3 Press A to select L ON or L OFF default 4 Press
10. rement Mode 5 To enter a new custom bar graph when NEWCG is displayed press map T2 6 To program minimum graph percentage the display will indicate O O with the right digit flashing the bottom most segment of the bar graph will flash and the dis play will read PCTFS percent full scale Reset Returns the product to the factory default val ues Preserves field calibration Factory calibra tion can be restored in the RECAL menu 1 In menu mode A until RESET Press GS v gt to scroll to a num ber 0 9 Press to select that num ber The left digit will now begin to flash Press A v to scroll to a number 0 9 to select that number The 2 digit number entered represents the percentage of full scale to be used as the low end of the graph 0 99 7 To program maximum percentage of full scale the display will indicate 1 0 O with the right digit flashing the upper most segment of the graph will flash and the display will read PCTFS percent full scale Press A to scroll to a number 0 9 Press to select that number The left 2 digits will now begin to flash Press A w 0 scroll to a number 0 10 Press ma to select that number The number en tered represents the percentage of full scale to be used as the high end of the graph Note 100 is the highest and only possible 3 digit number If the low num ber is equal to or larger than the high number
11. t to scroll until TIMER is displayed Press 3 Then press AG to scroll through values NONE designates that the gauge will remain ON until the power key is pressed a second time Any other value 1 min default 5 min 20 min other than NONE will designate the duration of time this func tion will be in effect Press to select desired value timer icon will be shown on the display and the unit will display DONE then re turn to Measurement Mode Feature Timer icon will flash 10 seconds prior to gauge shut down Light Determines how long the back light will remain ON after any key is pressed in Measurement or Menu Modes Note The timer is reset with any key being pressed 1 While in Menu mode press A amp until LIGHT is displayed 2 Press for timer value to appear ON refers to the back light remaining ON at all times unit is powered ON PRESS designates that the back light is switched on off by briefly pressing the backlight whereas OFF in dicates the back light will never be illu minated Selecting time values 1 MIN default 5 MIN 20 MIN will activate the backlight symbol on the LCD display for the designated minutes 3 Press w to select back light time display will briefly show DONE and return to Measurement Mode Note In PRESS mode factory has set 1 hour time
12. t up to power slowly and valves opened slowly To avoid damage from both fluid hammer and surges a surge chamber should be installed Symptoms of fluid hammer and surge s dam aging effects e Digital Gauge exhibits large zero offset e Digital Gauge pressure display remains constant regardless of pressure e Error code is displayed on screen FREEZING Prohibit freezing of media in pressure port Unit should be drained Mount in vertical po sition to prevent possible overpressure damage from frozen media 3 INSTALLATION This procedure requires the use of a 1 6 27mm hex wrench for tightening the in strument to the process connection Apply Teflon tape or a suitable sealing compound to NPT threads of the gauge Take using the wrench tighten 1 turn beyond hand tight or until a leak proof seal has been achieved A Caution Tightening the product by grasping or putting a tool on the plastic housing can cause permanent damage to the product 4 GENERAL INFORMATION Keypad CD Power On Off Enter 2 Zero Up Arrow Tare Qo A Tare rd 3 Menu Selection Down Backlight Arrow o v JT 4 Key presses are short less than 0 5 seconds or long greater than 0 5 seconds n 15 m a LCD DISPLAY LCD functions 1 5 numerical digits for pressure display 2 20 segment pressure range bar graph each segment equals 5 of range 3 Sleep and Backlight Timer symbols 4 Maximum M
13. the unit will flash REJCT and it will exit back into the GRAPH sub menu Note Custom graph function is not available on vacuum and compound ranges Note A display message ULOCK indicates that custom units are being used and bar graph minimum and maximum are set to the factory defaults appears on display s lower line ine Factory defaults pertain to units timer back light update rate zero lock Display will indicate DONE then gauge will switch to OFF condition Changing Batteries Grip knurled back cover and rotate counter clockwise until the unlock icon is in alignment with the arrow this is on the housing at the base of the pressure connection WARNING Misuse damage Refer to 340 100 Remove cover by pulling straight back and replace AA alkaline batteries accordingly ensure that the batteries are in the proper polarity position Ml a DE SC For reattachment of cover align the unlock icon with the arrow push cover straight in then turn clockwise until the arrow is in alignment with the Lock icon Note Reinstallation of the back cover may cause the unit to read negative pressure This is a temporary issue as the internal case pressure will be relieved by the case vent and equalize with atmospheric pressure 90 of the offset will equalize within 1 minute the remaining 10 may take up to 5 minutes 14 Pressure Range Dimensio
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