ASHCROFT GXLdp Differential Indicating Pressure Transmitter Instruction Manual
- June 3, 2024
- ASHCROFT
Table of Contents
GXLdp Differential Indicating Pressure Transmitter
Installation and Operating Instructions for GXLdp Differential Indicating
Pressure Transmitter
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. © 2021 Ashcroft Inc.
I&M011-10287_RevC_04-22-21 1
2
TABLE OF CONTENTS
Warnings/ General Information…………………………………………………………… 4 Keypad Functions & LCD
Display………………………………………………………… 5 Menu
Functions/Programming…………………………………………………………… 6-14 Error
Messages………………………………………………………………………………..15 Display Resolution
Table…………………………………………………………………… 16 Wiring
Diagrams……………………………………………………………………………… 17-18
Specifications…………………………………………………………………………………..19 General
Dimensions…………………………………………………………………………. 20 Panel Mount
Dimensions…………………………………………………………………… 21 Load Limitation
Chart……………………………………………………………………….. 22
3
m WARNING! READ BEFORE INSTALLATION m
DESCRIPTION: The Ashcroft Model GXLdp Differential Indicating Pressure
Transmitter is to be used with clean, dry, non-corrosive gases. The accuracy
is ±0.25% or ±0.50% of Span Terminal Point, and its performance is traceable
to the U.S National Institute of Standards and Technology (NIST). Both
unidirectional (e.g. 0 to +1.0 in. H2O) and bidirectional (e.g. ±0.25 in. H2O)
type ranges are available.
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.
OVERPRESSURE: Pressure spikes in excess of the rated overpressure capability
of the transmitter may cause irreversible electrical and/or mechanical damage
to the pressure measuring and containing elements.
INSTALLATION AND WIRING INSTRUCTIONS Mounting: The GXLdp transmitter can be
mounted on a 35 mm DIN rail or with #8 or #10 screws using the 3 mounting
holes provided. Torque limits on the three mounting holes provided is 9.6
inch-pounds. For optional panel mounting information, please refer to page 21.
Electrical Wiring: To open the housing, push the latch through the opening on
the right side of the unit until the font cover releases from the body.
Connect wiring to the pluggable/unpluggable terminal block. See wiring
diagrams on pages 17-18. Use a screwdriver to tighten after the stripped wire
is fully inserted. To close the unit, press the front cover against the rear
cover firmly until the latch engages. The use of shielded cable is recommended
for optimum performance. Connect the shield to the guard terminal on the
reading instrument (meter etc.) if available or to ground. The GXLdp will
automatically detect if a 2-wire or 3-wire power supply has been used to power
up the device.
STATIC ELECTRICAL CHARGES: Any electrical device may be susceptible to damage when exposed to static electrical charges. To avoid damage to the transducer the operator/installer should follow proper ESD (electrostatic discharge) protection procedures before handling the pressure transducer.
4
KEYPAD FUNCTIONS AND LCD DISPLAY INFORMATION
Keypad Functions: Up Arrow Backlight/Back SpoolCalTM Key
Down Arrow Menu/Enter
LCD Display Information: The top (numerical) display portion reads the current
pressure range during normal operation. The lower (alphanumeric) display
portion reads the engineering units during normal operation. SW1 is present if
SW1 (Switch 1) is active. ON or OFF displays depending on trip status of the
switch. SW2 is present if SW2 (Switch 2) is active. ON or OFF displays
depending on trip status of the switch. mA or Vdc will display depending on
the selected Analog Output. 2W or 3W will display depending on if a 2-wire or
3-wire input power supply is connected to the GXLdp.
5
MENU FUNCTIONS/PROGRAMMING Keypad Functions Backlight/Back
The back button
generally moves back
one screen in the menu. The back button also
allows you to continue to move back until you
return to the main menu if you wish to exit
from a specific menu function. This button
also allows the user to turn the Backlight
function on or off with a (2-second) long
button press.
BL ON will flash on the display when the Backlight function is being turned on.
Up Arrow Button
G
The up arrow G generally scrolls up in the menu tree, or performs an adjustment. The up arrow G also allows the user to check the configuration/settings of the GXLdp: Units, Range, Output and Firmware version will all display with a (2-second) long button press. Please note that only the Analog Output is field selectable and the other parameters are as built at the factory. If a long button press of the up arrow G occurs, the menu screens will appear as shown below. Each of these parameters will flash on the screen briefly and then disappear.
BL OFF will flash on the display when the Backlight function is being turned
off. After a couple of seconds, the BL OFF message will disappear from the
screen.
6
Up Arrow Button (continued)
G MAIN MENU SELECTIONS: A OUT Analog Output: Allows user to choose output signal. DAMP Dampening: Allows user to vary the response time of the GXLdp output. The digital display and the analog output are both updated with the use of the DAMP function. RECAL Recalibration: Allows user to perform a field calibration of the zero and span setting of the GXLdp. RESET Reset: Allows user to reset the GXLdp to its original factory settings. ZERO Zero: Allows the user to perform a user zero offset of the GXLdp SWITC (Optional) Switch function: Allows the user to enable and set one or two NPN or PNP switch outputs.
Down Arrow Button
H
The down arrow H scrolls down in the menu tree.
Menu/Enter
The Menu/Enter button
moves right in
the menu tree, if there is an item to the right.
If there is no item to the right, the Menu/
Enter button
saves the user’s changes
to (non-volatile) memory and exits the menu
tree. This button also allows the user to Zero
the unit from the live display with a (2-second)
long button press. Press Menu/Enter
with
a long button press. The word `ZERO’ will
flash briefly. The unit is now zeroed and will
then return to the main menu (live pressure
readings).
A OUT: Analog Output Analog Output choices are selectable through the menu.
There are five Analog Outputs to choose from: 4-20 mA, 0-5 Vdc, 0-10 Vdc, 1-5
Vdc, 1-6 Vdc . a. 4-20 mA is designated by mA’ b. 0-5 Vdc is designated by V0-5′
c. 0-10 Vdc is designated by V0-10′ d. 1-5 Vdc is designated byV1-5′ e. 1-6
Vdc is designated by `V1-6′
Please note that 4-20 mA output can be powered up by a 2-wire or 3-wire Input
Power Supply, while a Voltage output must be powered by a 3-wire Input Power
Supply. If 4-20 mA output is selected and the SWITCH function is activated,
the unit requires a 3-wire Input Power Supply. The GXLdp can automatically
detect if the input power is a 2-wire or a 3-wire device. The current Analog
Output default can be seen on the digital display of the main menu using one
of the designations noted above. A new unit ships with mA (4-20 mA) set as the
default.
7
Field Selection of the Analog Output:
1. To change the Analog Output, press the
Menu/Enter button
, and scroll
through the main menu until `A OUT’ is
flashing.
Then press Menu/Enter button
again.
The currently selected analog output will
be flashing.
2. To keep the output the same, press
Menu/Enter
and then while `SAVE’ is
flashing, press Menu/Enter
to return
to the live display.
3. To change the current Analog Output use
the up or down arrow buttons G H until
the desired output is flashing and then
press Menu/Enter
. `SAVE’ will then
be flashing. Press Menu/Enter
to
save this new selection and then you will
return to the live display.
4. f you do not want to save this selection
scroll from SAVE’ toCANCL’, and while
`CANCL’ is flashing, press Menu Enter
and then the unit will return to the live
display with no change to the Analog
Output setting.
DAMP: Dampening User can select from four display response times: a. 250 ms b. 1 sec c. 3 sec d. 5 sec. 250 ms is the standard factory default.
Modify the `DAMP’ (Dampening) selection
in the field:
1. To change the `DAMP’ setting press the
Menu/Enter button
and scroll using
the up or down arrow buttons G H
until `DAMP’ is flashing. Then press the
Menu/Enter button
.
2. The current `DAMP’ setting will be flashing.
3. Scroll using the up or down arrow buttons
G H until the desired dampening time
is flashing. Then press Menu/Enter
Then `SAVE’ will be flashing. Press Menu/
Enter
to save the new DAMP setting.
The unit will then revert to live pressure
readings.
4. If you do not want to save the new `DAMP’
setting, scroll using the up or down arrow
buttons G H until `CANCL’ is flashing.
Press Menu/Enter
. The DAMP set-
ting will not be changed from the previous
setting and the display will revert to live
pressure readings.
RECAL: Re-Calibration The `RECAL’ function in the GXLdp menu provides the user the ability to field calibrate the product. The most recent factory calibration is permanently retained in memory and can be recalled at any time. Both zero and span adjustments are made through the menu.
When a factory new GXLdp is being re-calibrated for the first time in the
field, you will have the following options: 1. FACT reverts to the original
Factory
Calibration settings. 2. NEW allows the user to perform a new
Calibration in the field.
After the GXLdp has been re-calibrated at least once in the field, you will
have the following options: 1. FACT reverts to the original Factory
Calibration settings. 2. NEW allows the user to perform a new
Calibration in the field. 3. FIELD reverts to the most recently
performed Field Calibration.
Factory Calibration (FACT)
Enter Factory Calibration to reset the unit to
its most recent factory calibration parameters.
1. Press the Menu/Enter button
and
8
scroll using the up or down arrow buttons
G H until `RECAL’ is flashing on the dis-
play. Then press Menu/Enter
again.
2. Then the menu choices will be FACT/
FIELD/NEW. Press the up or down arrow
buttons G H until `FACT’ is flashing on
the display.
3. When `FACT’ is flashing on the display,
press the Menu/Enter button
.
4. Then with `SAVE’ flashing on the display
press the Menu/Enter button
.
5. This will restore the most recent factory
calibration.
6. If `SAVE’ is flashing and you do not wish
to `SAVE’ the factory calibration, use the
up or down arrow buttons G H to scroll
to CANCL’ and whileCANCL’ is flashing
on the display, press Menu/Enter
which will return you to the main menu.
New Field Calibration (NEW)
Enter New Field Calibration if you wish to
perform a field calibration of the GXLdp.
1. Press the Menu/Enter button
and
scroll using the up or down arrow buttons
G H until `RECAL’ is flashing on the
display. Press the Menu/Enter Button
.
2. There will be three menu choices FACT/
FIELD/NEW. Scroll using the up or down
arrow buttons G H until `NEW’ is flashing.
3. When `NEW’ is flashing on the display,
press the Menu/Enter Button
.
4. `ADJST/ZERO’ will now be flashing on the
display. This will allow you to calibrate
the Zero value for the GXLdp.
5. Apply zero pressure to the Hi and Lo ports
of the GXLdp. This can be best accom-
plished by shorting the HI and LO ports on
the GXLdp.
6. Using the up or down arrow buttons
G Hscroll until the display reads zero.
Then press the Menu/Enter button .
The unit is now zeroed.
7. `ADJST/SPAN’ will now be flashing on the
display.
8. You will need an external reference pres-
sure source to adjust the span setting.
9. Connect tubing from the reference
pressure source to both the Hi and Lo
pressure ports of the GXLdp.
10. Using the external reference pressure
source, increase the pressure to the
full-scale value of the GXLdp. Then scroll
using the up or down arrow buttons
G H until the display reads the same as
the pressure reference. Note: Span can
be adjusted between 90% and 100% of
the full scale value.
11. Press the Menu/Enter button
.
12. The menu will now flash `SAVE’ on
the display. If you wish to save the
NEW calibration, press the Menu/Enter
button .
13. If you do not want to save the NEW
calibration, use the up or down arrow
buttons G H to scroll from SAVE to
CANCL. With `CANCL’ flashing on the
display press the Menu/Enter button
. This will return the GXLdp to the
main menu and the NEW calibration will
not be saved. The unit will maintain its
most recent calibration.
14. Once you have finished a NEW calibra-
tion, this will be stored as the FIELD
Calibration.
Field Calibration (FIELD)
Enter Field Calibration if you wish to recover
the most recent field calibration values stored
in the GXLdp.
1.Press the Menu/Enter button
and
scroll using the up or down arrow buttons
G H until `RECAL’ is flashing on the
display. Then press Menu/Enter
again.
2. Then the menu choices will be FACT/
FIELD/NEW. Press the up or down arrow
buttons G H until `FIELD’ is flashing on
the display.
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3. When `FIELD’ is flashing on the display,
press the Menu/Enter button
.
4.Then with `SAVE’ flashing on the display
press the Menu/Enter button
.
5. This will restore the most recent field
calibration.
6. If `SAVE’ is flashing and you do not wish
to `SAVE’ the field calibration, use the up
or down arrow buttons G H to scroll to
CANCL’ and whileCANCL’ is flashing on
the display, press Menu/Enter
which will return you to the main menu.
RESET: This will allow the user to revert to all menu settings as shipped from the factory. This includes: Analog Output, Switch settings (if option is applicable), Damping, and User Zero. This will also clear any saved Field Calibration from memory and reset the GXLdp to the Factory Calibration.
To perform the RESET procedure:
1. Press Menu/Enter
and scroll using
the up or down arrows G H until `RESET’
is flashing. Then press Menu/Enter .
2. `SAVE’ will now be flashing on the display.
If you wish to restore all factory default
settings, press Menu/Enter
while
`SAVE’ is flashing on the display. The unit
will then return to the main menu and all
factory settings will be re-stored including
FACTORY Calibration.
3. If you do not want to restore all factory
default settings, scroll using the up or
down arrow keys G H until `CANCL’ is
flashing on the display, and then press
Menu/Enter . The unit will return to
the main menu and no settings will be
changed.
ZERO (Zeroing function) In addition to being able to Zero from the live display, the user can also Zero the unit through the Menu.
1. Press Menu/Enter
and scroll using
the up or down arrows G H until `ZERO’
is flashing on the display.
2. Press Menu/Enter
and then while
`SAVE’ is flashing press Menu/Enter
again. This will zero the unit, and return
to live pressure readings.
OPTIONAL FEATURES:
SWITC: Switch function The GXLdp is available with an optional switch function. If ordered this feature will allow the user to choose between 1 or 2 PNP or NPN switches as well as allowing the user to choose the set and reset point of each switch. If the user chooses to use two switches, they must be the same type, either PNP or NPN.
NOTE: To set an Increasing set point, the reset value must be lower than the set point To set a Decreasing set point, the reset value must be higher than the set point
To enable and set the switch feature
1. To enable the optional switch, press the
Menu/Enter button
, and scroll
through the main menu using the up or
down arrow buttons G H until `SWITC’ is
flashing. Then press Menu/Enter button
again.
2. Initially, PNP will be flashing on the dis-
play, and you can change the switch type
to NPN by pressing the up or down arrow
buttons G H
3. Once you are on the desired switch type
press the Menu/Enter button
.
4. Initially, SW1 DISAB will be flashing on
the display. Press the up or down arrow
buttons G H until SW1 ENABL is flashing
on the display. Then press the Menu/
Enter button
.
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5. SW1SP will be flashing on the display.
This will allow the user to calibrate the
SW1 (Switch 1) set point.
6. Press the Up arrow G, this will cause the
first digit to flash.
7. If you wish to change this digit press the
up or down arrow buttons G H
(NOTE: for Bidirectional ranges you can
set the switch for a negative set point,
this will be designated by a minus sign
showing in front of the set point on the
display).
8. Once you adjust the digit to the appropri-
ate number, press the Menu/Enter button
to get to the next digit.
9. Repeat steps 7 & 8 until all 5 digits are
displaying correctly. While the last digit is
flashing, press the Menu/Enter button
. Then SW1SP will be flashing on
the display. Press the Menu/Enter button
again.
10. SW1RS will be flashing on the display.
This will allow the user to calibrate the
Switch 1 reset point.
11. Press the Up arrow G, this will cause
the first digit to flash.
12. To change this digit press the up or
down arrow buttons G H
(NOTE: for Bidirectional ranges you can
set the switch for a negative set point,
this will be designated by a minus sign
showing in front of the set point on the
display).
13. Once you adjust the digit to the appro-
priate number, press the Menu/Enter
button
to get to the next digit.
14. Repeat steps 12 & 13 until all 5 digits
are displaying correctly. While the last
digit is flashing, press the Menu/Enter
button
. Then SW1RS will be
flashing on the display. Press the Menu/
Enter button
again. SW1 setup is
now complete.
15. Then SW2 DISAB will flash on the dis-
play. If you also want to enable switch
two (SW2) repeat steps 4 through 14 to
setup SW2. If you do not wish to enable
SW2, simply press the Menu/Enter but-
ton
while SW2 DISAB is flashing.
16. SAVE will flash on the display. Press
the Menu/Enter button
to save
the settings for both SW1 and SW2. The
display will return to the main menu.
NOTE: Once you have completed the set up for the SWITCH (SWITC) function, any enabled switch is indicated in the lower left portion of the display. If SW1 or SW2 are energized the display will show ON under the appropriate switch, if SW1 or SW2 are de-energized the display will show OFF under the appropriate switch.
SpoolCalTM (XPV): The rotating process valve actuator in conjunction with the SpoolCalTM actuator tool provides two types of available tests including Calibrate (CAL) and Monitor (MONITOR) through the appropriate Hi and Lo Port of the SpoolCal actuator tool. In the CAL (Calibrate) mode, the GXLdp is isolated from the process and allows externally generated test pressure input for calibration. In the MONITOR (Monitor) mode, the live system pressure can be monitored with an ASHCROFT ATE-2 Calibrator or other handheld instrument without physically unplugging the process tubes. The “XPV” option supplies a SpoolCalTM actuator and 7 of silicon tubing. The actuator tool can be set to either CAL (Calibrate mode), MONITOR (Monitor mode) or OFF, and also includes HI (high) and LO (low) differential pressure ports.
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GXLdp SPOOL CALTM OPERATION
From the `OFF’ position, the SpoolCalTM actuator tool can be inserted and
removed. Rotate the actuator tool 90° clockwise for Calibration mode (CAL) or
90° counter clockwise for Monitor mode (MONITOR)
CAL
ROTATE KEY 90° CLOCKWISE TO (CAL) POSITION
OFF HI
MONITOR
LO
OFF POSITION
OFF HI
ROTATE KEY 90° COUNTER CLOCKWISE TO (MONITOR) POSITION
MONITOR
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Calibration (CAL): Both zero and span adjustments are made through the menu. (For complete calibration details of the GXLdp without using the Spool Cal option, refer to the RECAL section- page 8). A 90-degree clockwise rotation of the SpoolCal key places the unit into `CAL’ mode, this isolates the GXLdp from the process pressure. The RECAL function in the GXLdp menu provides the user the ability to field calibrate the product. The most recent factory calibration is permanently retained in memory and can be recalled at any time.
Once you enter the Re-Calibration (RECAL) Mode you will have the following options: 1. FACT Factory Calibration 2. NEW New Field Calibration 3. FIELD Field Calibration Note: On initial calibration, Field Calibration will not show in the menu. To perform the initial field calibration you will choose New (New Field Calibration). Once you have saved the New Calibration, Field Calibration will appear the next time you enter Calibration Mode.
Factory Calibration (FACT)
Enter Factory Calibration to reset the unit to
its most recent factory calibration parameters.
1. Press the Menu/Enter button
and
scroll using the up or down arrow buttons
G H until `RECAL’ is flashing on the dis-
play. Then press Menu/Enter
again.
2. Then the menu choices will be FACT/
FIELD/NEW. Press the up or down arrow
buttons G H until `FACT’ is flashing on
the display.
3. When `FACT’ is flashing on the display,
press the Menu/Enter button
.
4. Then with `SAVE’ flashing on the display
press the Menu/Enter button
.
5. This will restore the most recent factory
calibration.
6. If SAVE’ is flashing and you do not wish toSAVE’ the factory
calibration, use the up or down arrow buttons G H to scroll to CANCL’ and whileCANCL’ is flashing on the display, press Menu/Enter which will return
you to the main menu.
New Field Calibration (NEW):
Enter New Field Calibration if you wish to
perform a field calibration of the GXLdp.
1. Press the Menu/Enter button
and
scroll using the up or down arrow buttons
G H until `RECAL’ is flashing on the
display. Press the Menu/Enter Button
.
2. There will be three menu choices FACT/
FIELD/NEW. Scroll using the up or down
arrow buttons G H until `NEW’ is flashing.
3. When `NEW’ is flashing on the display,
press the Menu/Enter Button
.
4. `ADJST/ZERO’ will now be flashing on the
display. This will allow you to calibrate the
Zero value for the GXLdp.
5. Apply zero pressure to the Hi and Lo
ports. This can be best accomplished
by shorting the HI and LO ports on the
SpoolCalTM actuator tool using the silicon
tubing supplied.
6. Using the up or down arrow buttons G H
scroll until the display reads zero. Then
press the Menu/Enter button
. The
unit is now zeroed.
7. `ADJST/SPAN’ will now be flashing on the
display.
8. Remove the silicone tubing from the
SpoolCalTM actuator tool.
9 You will need an external pressure source
to adjust the span setting.
10. Connect tubing from the pressure source
to both the Hi and Lo pressure ports of
the SpoolCalTM actuator tool.
11. Using the external pressure source,
increase the pressure to the full-scale value
of the GXLdp. Then scroll using the up or
down arrow buttons G H until the display
reads the same as the pressure reference.
13
12. Press the Menu/Enter button
.
13. The menu will now flash `SAVE’ on
the display. If you wish to save the
NEW calibration, press the Menu/Enter
button
.
14. If you do not want to save the NEW
calibration, use the up or down arrow
buttons G H to scroll from SAVE to
CANCL. With `CANCL’ flashing on the
display press the Menu/Enter button
.This will return the GXLdp to the
main menu and the unit will maintain its
most recent calibration.
15. Once you have finished a NEW calibra-
tion, this will be stored as the FIELD
Calibration.
Field Calibration (FIELD):
Enter Field Calibration if you wish to recover
the most recent field calibration values stored
in the GXLdp.
1. Press the Menu/Enter button
and
scroll using the up or down arrow buttons
G H until `RECAL’ is flashing on the dis-
play. Then press Menu/Enter
again.
2. Then the menu choices will be FACT/
FIELD/NEW. Press the up or down arrow
buttons G H until `FIELD’ is flashing on
the display.
3. When `FIELD’ is flashing on the display,
press the Menu/Enter button
.
4. Then with `SAVE’ flashing on the display
press the Menu/Enter button
.
5. This will restore the most recent field
calibration.
6. If `SAVE’ is flashing and you do not wish
to `SAVE’ the field calibration, use the up
or down arrow buttons G H to scroll to
CANCL’ and whileCANCL’ is flashing on
the display, press Menu/Enter
which will return you to the main menu.
Monitor (MONITOR): While in MONITOR’ (Monitor) mode, the GXLdp can provide the (live) system pressure measurement without having to physically unplug the process tubes. Insert the SpoolCalTM actuator tool into the side of the GXLdp, while the SpoolCalTM is in theOFF’ position. A 90-degree counterclockwise
rotation tee’s the process to both the GXLdp unit and out through the
SpoolCalTM actuator tool, and provides external measurement capability with
the use of a portable instrument such as the Ashcroft ATE-2. Connect the
tubing from the portable instrument to both the high and low pressure port of
the SpoolCalTM actuator tool. The user can then verify (live) system pressure
readings.
14
GXLdp Error Messages
Note: Multiple Errors may be displayed.
Err02
Err03 Err04 Err05 Err06 Err07 LIMIT OVER S LOC UNDER Z LOC
Configuration Error. Mismatch between sensor serial number on the sensor board
and the sensor serial number recorded on the display board. FATAL ERROR.
Calibration Error. Device has not been factory calibrated or the factory
calibration data is corrupt. FATAL ERROR.
Settings Error. User Settings (Menu settings) are corrupt. FATAL ERROR.
Communication Error. Pressure sensor has stopped working. FATAL ERROR.
3-Wire Power Error. Voltage output is selected, but there is no external
power. This may be field correctable.
Range data missing or corrupt. FATAL ERROR
LIMIT will display if the user tries to Zero more than 5% of Span. LIMIT will
also display if the user tries to adjust Span by more than 5% of the positive
full-scale value.
OVER will display if the unit is Over-Pressured.
S LOC will display if the user attempts to make a span adjust-
ment at less than 90% of the positive full-scale value.
UNDER will display if the unit is Under-Pressured.
Z LOC will display if the user attempts to make a zero offset adjustment while
outside of Zero ±10% of positive full-scale.
15
GXLdp Display Resolution Table
in. H2O Unidirectional 0.10 in. H2O 0.20 in. H2O 0.25 in. H2O 0.40 in. H2O 0.50 in. H2O 0.60 in. H2O 0.75 in. H2O 1.00 in. H2O 2.00 in. H2O 2.50 in. H2O 3.00 in. H2O 5.00 in. H2O 10.00 in. H2O 15.00 in. H2O 20.00 in. H2O 25.00 in. H2O Pa Unidirectional 25 Pa 50 Pa 60 Pa 100 Pa 125 Pa 160 Pa 200 Pa 250 Pa 300 Pa 400 Pa 500 Pa 600 Pa 1.00 kPa 1.60 kPa 2.00 kPa 2.50 kPa 4.00 kPa 5.00 kPa 6.00 kPa
MIN 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.000 0.000 0.000 0.000 0.000 0.00 0.00 0.00 0.00 MIN 0.00 0.00 0.00 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.000 0.000 0.000 0.000 0.000 0.000 0.000
MAX 0.1000 0.2000 0.2500 0.4000 0.5000 0.6000 0.7500 1.000 2.000 2.500 3.000 5.000 10.00 15.00 20.00 25.00 MAX 25.00 50.00 60.00 100.0 125.0 160.0 200.0 250.0 300.0 400.0 500.0 600.0 1.000 1.600 2.000 2.500 4.000 5.000 6.000
mb Unidirectional 0.25 mb 0.50 mb 0.60 mb 1.00 mb 1.25 mb 1.60 mb 2.00 mb 2.50 mb 3.00 mb 4.00 mb 5.00 mb 6.00 mb 10.00 mb 16.00 mb 20.00 mb 25.00 mb 40.00 mb 50.00 mb 60.00 mb
MIN 0.0000 0.0000 0.0000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00 0.00 0.00 0.00 0.00 0.00 0.00
MAX 0.2500 0.5000 0.6000 1.000 1.250 1.600 2.000 2.500 3.000 4.000 5.000 6.000 10.00 16.00 20.00 26.00 40.00 50.00 60.00
in. H2O Bidirectional (±) 0.05 in. H2O (±) 0.10 in. H2O (±) 0.25 in. H2O (±) 0.50 in. H2O (±) 1.00 in. H2O (±) 2.00 in. H2O (±) 2.50 in. H2O (±) 3.00 in. H2O (±) 5.00 in. H2O (±) 8.00 in. H2O (±) 10.00 in. H2O (±) 15.00 in. H2O (±) 25.00 in. H2O
MIN -0.0500 -0.1000 -0.2500 -0.500 -1.000 -2.000 -2.500 -3.000 -5.00 -8.00 -10.00 -15.00 -25.00
MAX 0.0500 0.1000 0.2500 0.500 1.000 2.000 2.500 3.000 5.00 8.00 10.00 15.00 25.00
Pa Bidirectional (±) 15 Pa (±) 25 Pa (±) 30 Pa (±) 50 Pa (±) 60 Pa (±) 100 Pa
(±) 125 Pa (±) 160 Pa (±) 200 Pa (±) 300 Pa (±) 400 Pa (±) 500 Pa (±) 600 Pa
(±) 1.0 kPa (±) 1.25 kPa (±) 1.6 kPa (±) 2.00 kPa (±) 2.50 kPa (±) 4.00 kPa
(±) 5.00 kPa mb Bidirectional (±) 0.15 mb (±) 0.25 mb (±) 0.30 mb (±) 0.50 mb
(±) 0.60 mb (±) 1.00 mb (±) 1.25 mb (±) 1.60 mb (±) 2.00 mb (±) 3.00 mb (±)
4.00 mb (±) 5.00 mb (±) 6.00 mb (±) 10.00 mb (±) 12.50 mb (±) 16.00 mb (±)
20.00 mb (±) 25.00 mb (±) 40.00 mb (±) 50.00 mb
16
MIN -15.00 -25.00 -30.00 -50.0 -60.0 -100.0 -125.0 -160.0 -200.0 -300.0 -400 -500 -600 -1.000 -1.250 -1.600 -2.000 -2.500 -4.00 -5.00 MIN -0.1500 -0.2500 -0.3000 -0.500 -0.600 -1.000 -1.250 -1.600 -2.000 -3.000 -4.00 -5.00 -6.00 -10.00 -12.50 -16.00 -20.00 -25.00 -40.0 -50.0
MAX 15.00 25.00 30.00 50.0 60.0 100.0 125.0 160.0 200.0 300.0 400 500 600 1.000 1.250 1.600 2.000 2.500 4.00 5.00 MAX 0.1500 0.2500 0.3000 0.500 0.600 1.000 1.250 1.600 2.000 3.000 4.00 5.00 6.00 10.00 12.50 16.00 20.00 25.00 40.0 50.0
GXLdp Wiring Diagrams 2 Wire 4-20mA Output V+ V- Vout EXT S1 S2
+ Power Vdc –
Optional Low-Side current sense shown in dashed lines
3 Wire 4-20mA Output V+ V- Vout EXT S1 S2
+ Power Vdc –
3 Wire 4-20mA Output V+ With PNP Switches
V- Vout EXT S1 S2
30Vdc/50mA Max 30Vdc/50mA Max
+ Power Vdc –
PNP Load PNP Load
3 Wire 4-20mA Output V+ With NPN Switches
V- Vout EXT S1 S2
30Vdc/50mA Max 30Vdc/50mA Max
+ Power Vdc –
NPN Load NPN Load 17
GXLdp Wiring Diagrams 3 Wire Voltage Output V+ V- Vout EXT S1 S2
+ Power
V
Vdc/Vac –
–
3 Wire Voltage Output V+ V- Vout EXT S1 S2
With NPN Switches
30Vdc/50mA Max 30Vdc/50mA Max
+ Power Vdc/Vac –
+ V
–
NPN Load NPN Load
3 Wire Voltage Output V+ V- Vout EXT S1 S2
with PNP Switches
30Vdc/50mA Max 30Vdc/50mA Max
+ Power Vdc/Vac –
+ V
–
PNP Load PNP Load
18
GXLdp SPECIFICATIONS
Accuracy: ±0.25% or ±0.50% of Span, Terminal Point Method
Range Capability (Unidirectional): 0.1 in. H2O through 25 in. H2O, 25 Pa
through 6 kPa, 0.25 mb through 60 mb
Range Capability (Bidirectional): ±0.05 in. H2O through ±25 in. H2O, ±15 Pa
through ±5 kPa, ±0.15 mb through ±50 mb
Adjustable Display Response Time Dampening): 250 ms, 1 sec, 3 sec, 5 sec
Temperature Limits: Storage: -22°F to 176°F (-30°C to 80°C) Operating: -4°F to
176°F (-20°C to 80°C) Compensated: 35°F to 130°F (1.6°C to 54°C)
Max. Static (Line) Pressure: 25 psi
Proof Pressure: 15 psid
Burst Pressure: 25 psid
Zero Adjustment: ±5% of span (accessible through menu)
Span Adjustment: ±5% of full scale value (accessible through menu)
Field Selectable Output Signals: Current: 4-20 mA (2-wire or 3-wire) with
Supply Voltage: 12-40 Vdc (24 Vdc typical)
Voltage: 0-5 Vdc, 0-10 Vdc, 1-5 Vdc, 1-6 Vdc (all 3-wire) with Supply Voltage:
12-40 Vdc or 24 Vac(± 20%) (24 Vdc/Vac typical)
Reverse polarity and mis-wire protected:
LCD Display: 3-5 digits: The resolution/decimal place is fixed based on the
range and is not field changeable. See display resolution chart on Page 16
LCD Screen Dimensions: 2.63 Width x 1.38 Height
LCD Character Size: 7-segment (Numeric display): 0.32 Width x 0.65 Height
14-segment (Alphanumeric display) : 0.28 Width x 0.49 Height
Pressure Connection: 1/8 NPT Female, ¼ Barbed Male, 3/16 Barbed Male
Electrical Connection: ½ NPT Female Conduit Connection / PG9 Watertight Cable
Gland included.
Electrical connections made to a pluggable terminal block which accepts 18-24
AWG wires.
Enclosure Rating: UL 94-V0 Flame-retardant ABS, IP67/Nema 4
Process Media: The GXLdp is designed to measure clean, dry non-corrosive
gases. Not for use with liquids.
Weight: 0.8 lbs
Mounting: Din Rail/ Wall Mount standard, optional Panel Mount
Optional Switch Feature: Two independent switch outputs, NPN or PNP. Field
Programmable -set and reset points. (See detailed description on Pages 10-11)
Optional Spool Cal Actuator: (See detailed description on Pages 11-14)
19
GXLdp GENERAL DIMENSIONS
.21
.50
R.10
5.14
1.86 2.68
2.70 4.09
1.45
.47 1.95 1.59. 5.49.
2X Ø .20 1.34 TYP.
R5.24 150°
1.40 .60
.63
5.93
.12
HIGH SIDE
1.00 [25.5] 1.71 [43.3]
LOW SIDE
0.83 [21.0]
1.23 [31.2] 3.97 [100.9] ‘OFF’ SPOOL-CAL POSITION
20
1.67 .12
GXLdp PANEL MOUNTING INSTRUCTIONS & DIMENSIONS
To install the unit to the panel mounting: 1. Make a cutout 7 minimum vertical
x 5.9 minimum horizontal in
your panel or mounting location. 2. Provide (4) 6-32 threaded holes as shown
in the drawings below. 3. Place 3 spacers between the unit and the panel mount
adapter
and insert 6-32 x 1½ screws from the back side of the unit and thread them
into the panel mount adapter as shown in the drawings below. 4. Mount to the
panel using provided (4) 6-32 x ½ length screws.
3.13 [79.4]
6.07 [170.2] 3.35 85.1
0.30
5.81
[7.6] [147.5]
8.45 [214.7] 7.70 [195.5]
6.91 [175.6]
3.35
1.79 4X Ø .15
85.1
[3.8]
.12
21
LOAD LIMITATION GRAPH
Load Limitations 4-20 mA Output Only
1273 1200
1000
Loop Resistance ()
800
600
545
OPERATING
REGION
400
200
0
0
10 12
20 24 30
40
VMIN = 12V + [0.022A x (RL )] (includes a 10% safety factor)
RL = RS + RW RL = Loop Resistance (Ohms) RS = Sense Resistance (Ohms) RW =
Wire Resistance (Ohms)
22
23
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. © 2021 Ashcroft Inc. I&M011-10287_RevC_04-22-21
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