Installation and Operating Instructions for General Purpose Digital Pressure Gauge Type DG25 Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.com All sales subject to standard terms and conditions of sale. © 2017 Ashcroft Inc. I&M006-10197 DG25 02/2017

 WARNING! READ BEFORE INSTALLATION  1. GENERAL: A failure resulting in injury or damage may be caused by excessive overpressure, excessive vibration or pressure pulsation, excessive instrument temperature, corrosion of the pressure containing parts, or other misuse. Consult Ashcroft Inc. Stratford, Connecticut, USA before installing if there are any questions or concerns. (if possible), pumps should be brought 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 damaging effects:...

4. GENERAL INFORMATION: Keypad: Power On-Off / Enter Zero / Up Arrow / Tare ZERO Menu Selection / Down / Backlight Arrow MENU Key presses are short less than 0.5 seconds or long greater than 0.5 seconds

5 numerical digits for pressure display. 20 segment pressure range bar graph – each segment equals 5% of range. Sleep and Backlight Timer symbols. Maximum / Minimum Pressure and Tare icons. 5 character alpha-numeric digit display. 4 segment battery life indicator. Negative pressure indicator.

Note: Key presses designated as short (less than 0.5 sec) are indicated by “➟” ICON ZERO Press ➟. Upon release, the numeric display momentarily disappears and “ZERO” shows in alpha display, then returns to measurement mode. The pressure should now read 0. Zero value is stored in memory. Zero Function: Key presses designated as long (greater than 0.5 sec.) are indicated by “➟” ICON | ➟key to turn instrument ON / Press OFF. When initially turned ON, the display will momentarily show all LCD segments lit, product version and full scale range; the unit will then proceed automatically to the Measurement...

Tare Function: Subtracts current pressure value from value displayed in Measurement mode. In Measurement mode, apply desired pressure press "■* 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 now read 0. Press "■* 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 measurement mode. To enter menu mode 1. Press "-^and release to proceed...

Custom Units of Measure Allows a user to define a custom unit of measure, user must enter the full scale value of the desired reading, which can be done as follows. 1) In Menu Mode press ©■ © "■* select 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) unless the custom units feature had been used previously. If it had been used, the digits and decimal point position shall correspond to the last values set. Use the ©■ © "■* keys to move the decimal point...

Displays maximum / minimum pressure values; this is initiated upon powering the unit or since the values were cleared. 1. When in menu mode press ©■ © -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 3. Release of this key will leave you in Menu mode. Use ©■ © — to continue scrolling through the menu options, OR hold, ©I to return Note: Clearing Minimum / Maximum values will reflect a blank display except for the associated Min. / Max. icon and battery indicator. Note: The following...

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 ©■ © -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 ©I — whereas, “OFF” indicates the back light will never be illuminated. Selecting time values, “1 MIN” (default), “5 MIN”, “20 MIN”, will activate the backlight symbol on...

Utilized to prevent inadvertent re-zeroing of the instrument. 1. In Menu mode, press ©■ © -until “ZLOCK” appears. 3. Press © © —to select “L ON” or “L OFF” (default). 4. Press — to select value (display will briefly show “DONE”) and return to Measurement Mode. Note: If Z-Lock is activated, the gauge will display “ZLOCK” if zero is attempted. Provides the user the ability to field calibrate the product. Original factory calibration is permanently retained in memory and can be recalled at any time. 1. In menu mode press © © —until “RECAL” appears; proceed to press 2. Display will indicate “FACT”...

8. 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 show “WAIT” and count down from 6 seconds then briefly display GOOD then exit into measurement mode, or 9. COMPOUND RANGE GAUGES ONLY REQUIRE ONE ADDITIONAL CALIBRATION POINT NEAR VACUUM 10. 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 ", display will show “WAIT” and count down from 6 seconds then...