Ashcroft 2074 User manual

I&M008-10109 Rev. F 10/13
Digital Industrial Gauge
Operating Instructions
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Congratulations on your purchase of the Ashcroft®
digital industrial gauge. This feature-packed gauge
offers a menu-driven display for easy customization.
User selectable features include 12 units of measure-
ment, password protected calibration and disable
functions, adjustable bar graph and update rate.
A five digit display for maximum resolution is standard.
Optional 4-20mA output, switching and line- power
add to the versatility of the gauge. With the range
printed on the keypad, Ashcroft digital gauges meet
ASM B40.7 specification. See a complete listing of
product features and specifications on pages 16.
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TABLE OF CONTENTS
Quick Reference ............................................4-5
eypad Functions ..........................................6-8
• ON/OFF K Y
• Z RO/CL AR K Y
• MIN/MAX K Y (down arrow key)
• M NU K Y
• BACKLIT K Y (up arrow key)
• NT R K Y
MENU Functions (MENU Mode) ................................8-15
• ngineering Units
• CONFIG Mode
• Set Password
• Recalibration of Gauge
• Zero Key Adjustment
• Disabling Menu Options
• Bar Graph Options
• Auto Off Options
• Update Options for Displayed Pressure
• Dampening Options
• Backlite Options (Backlite Optional)
• Set Switch(es) Option(s) (Switches Optional)
Specifications ................................................16
Ranges ........................................................17
Display Messages ..........................................17
Wiring Diagrams ........................................18-29
Gauge Installation & Maintenance....................30-32
• Mounting
• Battery Replacement & Installation
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Bar graph
% of full scale
Flashing display when unit
pressured below zero
Press to indicate minimum
or maximum pressure
gauge has measured
Press again to return to
pressure units
Press to read menu
UNITS (Pressure)
ENGLISH
INHG
PSI*
INH2O
@ 4°C, 20°C, 60°F
FTW
FTSW
ETRIC
BAR
BAR
KPA
C H2O
KG/C 2
UPDATE RATE
(Pressure measurement
per second)
10x (100 MS)*
5x (200 S)
2x (500 S)
1x (1 Sec)
BACKLITE
(Off options)
Never
2 SEC
5 SEC*
15 IN
30 IN
.88˝ high digital display (41⁄2˝ case)
.60 high digital display(3˝ case)
QUICK REFE
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While in unit of measurement mode (eg: psi),
press the ZERO CLEAR button to rezero the
gauge. This feature functions when displayed
pressure is within ±5% or 10% of zero value
This bar graph indicates battery level;
the more segments, the closer the
battery is to full charge (only dis-
played on units with battery
Flashing display when unit
pressurized beyond full-scale
Press to turn backlite on or off
(backlite optional)
Range on keypad;
complies with AS E B40.7
Press to turn unit on or off
ent
AUTO OFF
(Turns unit off after
option selected)
Never*
2 minutes
5 minutes
15 minutes
30 minutes
CALIBRATE
Zero and span
adjustments,
password
protected
DISABLE
Allows for
“lockout” of
ENU
options
DA PENING
(Takes pressure reading
and averages
process pressure
None*
Avg 2
Avg 4
Avg 6
Avg 8
*Indicates Default
REFERENCE
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Turns the gauge on and off. When pressing the
ON/OFF key while in the off position, gauge start-
up display first indicates the software version
followed by the model number and gauge pres-
sure range. The gauge will then display indicated
pressure and be ready for use.
Press this key for one second prior to gauge
usage to rezero any initial zero shift. If zero shift
is greater than programmed zero allowance, the
gauge will display OFS T (blinking) for 1 sec-
ond, then return to the measure mode. To clear
minimum and maximum values, press
Z RO/CLR button (when min/max values are
indicated). Gauge will auto advance once zeroed.
EYPAD FUNCTIONS
ON/OFF
ZERO
CLR
MAX/MIN The Max/Min key allows review of minimum and
maximum pressure values since unit start-up or
last push of the clear key. Press key to:
1) Indicate maximum pressure.
2) Indicate minimum pressure.
3) xit MAX/MIN mode and return the unit to
pressure measurement mode. To clear mini-
mum and maximum values press Z RO/CLR
key (must be in MAX/MIN mode).
The (down arrow key) is used in the M NU
mode, see following M NU key section.
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This key allows for customization of the gauge.
Pressing the M NU key allows cycling through
the main M NU items; UNITS, CONFIG, GRAPH,
OFF, UPDAT & DAMP. Any item changed in the
Menu become the new default setting(s).
Revised settings are saved in the event of power
loss.
The (up arrow key) or (down arrow key)
on the keypad allows for scrolling through the
M NU options to increase or decrease numeric
values as required. If in the menu mode, gauge
will automatically advance to measure mode
once selected M NU item has been set.
This key manually turns the backlite on or off.
Five options are available. They include N V R,
10 sec, 30, sec, 1 min, 5 min*. With the N V R
option, the gauge BACKLIT will remain lit
whenever the gauge is in the ON mode or until
the BACKLIT button is pushed again. Options,
10 sec, 30 sec, 1 min, 5 min*. allow the BACK-
LIT to automatically turn-off after a selected
period of time.
To use the BAC LITE option:
Step 1: Press the M NU key.
Step 2: Press the (up arrow key) or (down
arrow key) until the word LIT appears.
Step 3: Press NT R.
Step 4: Press the (up arrow key) or (down
arrow key) to select the BACKLIT option.
Step 5: Press the NT R key to finalize your
choice of LIT options.
EYPAD FUNCTIONS
MENU
ey for gauge
with Backlite
ey for gauge
without Backlite
displayed with
 (up arrow
icon only)
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EYPAD FUNCTIONS
MENU OPTIONS
UNITS: 12 units of measurement are available: psi, mmHG,
inH2O with three temperature options: 20°C, 60°F, 4°C*,
mBar, inHg, ftH2O, mPa, kPa, kg/cm2and bar.
Step 1: Press the M NU key until the word UNITS appears.
Step 2: Press NT R.
Step 3: Press the (up arrow key) or  (down arrow
key) to select the required unit of measure.
Step 4: Press NT R to finalize the UNIT selection.
Note: For inH20 range with three temperature options,
press the

(up arrow key) and

(down arrow key) to
select the desired temperature, then press ENTER to final-
ize the UNIT selection.
CONFIG: This option allows access to additional Menu
options. Options include:
• ENTPW or enter password (this appears as a sub-menu
in the CONFIG mode if a user password has been set).
• RECAL (allows for zero, span and mid-scale calibra-
tion of the gauge).
• 0bUTN or zero key (allows for adjustment of % of
range that can be zeroed),
• dISAb, allows for disabling M NU options.
• SETPW: This feature allows for a user defined numer-
ic password. If a user password is not set, all features
in the CONFIG mode will be accessible without a
password. If a user password is set, all items in the
CONFIG menu options are accessible with or without
a user password. If a user password is programmed,
it will be required to access the CONFIG menu options.
Default user password is 12045 or 12*45.
*Indicates default.
ENTER
This key allows for selecting gauge features in the
menu finalizing selection. Use of the enter key is
described throughout operating instructions.
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How to Use Your Menu Functions
To set a user password (SETPW):
Step 1: Press the M NU key on the keypad
Step 2: Press the (up arrow key) or (down arrow
key) until the word CONFIG appears.
Step 3: Press NT R. The word S TPW appears on the
gauge display
Step 4: Press NT R. A five digit numeric password is
now required.
Step 5: Press the (up arrow key) or (down arrow
key) on the keypad to select the first digit of the password.
Step 6: Press NT R.
Step 7: Repeat until the five-digit password is shown on
the gauge display.
Step 8: Press NT R.
Note: to erase password at any time while in the SETPW
(set password) mode, press the ZERO/CLEAR key. The
user will be prompted to reprogram the password once the
five-digit password is entered. The gauge will display SAVE.
Step 9: Press NT R to save the password setting.
ENTPW: Once a user password has been established and
entry into the CONFIG mode is required, the user will be
prompted to NTPW or enter password.
Follow setup steps 4-8 above.
RECAL: or recalibrate allows for zero, mid-scale, full-scale
and factory default calibration of the gauge. The R CAL
feature also allows for recalibration of gauges with
4-20mA output.
MENU FUNCTIONS
*Indicates default.
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To use RECAL option:
Step 1: Press the M NU key on the keypad
Step 2: Press the (up arrow key) or (down arrow
key) on the keypad until the word CONFIG appears.
Step 3: Press NT R.
Step 4: nter user password if it has been programmed.
Step 5: Press (up arrow key) or (down arrow key)
until the word R CAL appears.
Step 6: Press NT R.
Step 7: The gauge will now flash between INPUT and unit
of measure on the lower line and .00 on the top line. Apply
zero pressure to the gauge.
Step 8: Press NT R. Zero pressure is now set.
Step 9: The gauge will display full-scale pressure. Apply
full-scale pressure to the gauge.
Step 10: Press NT R. Full-scale pressure is now set.
Step 11: The gauge will now display mid-scale pressure.
Apply mid-scale pressure to the gauge.
Step 12: Press NT R. Mid-scale pressure is now set.
Step 13: After zero, full-scale and/or mid-scale or factory
default calibration have been set, the word SAV appears
on the gauge display.
Step 14: Press NT R to finalize calibration.
(Note: For compound ranges this recalibration is zero,
full-scale, mid-scale and full-vac.)
FOR FACTORY CALIBRATED SETTINGS:
To reinstate factory settings for zero, full-scale and mid-
scale follow R CAL steps 1-6
Step 7: When the word INPUT appears press (up arrow
key) until the word FACT appears.
Step 8: Press NT R to finalize calibration.
MENU FUNCTIONS
*Indicates default.
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Note: Calibration of Zero, mid-scale or span can be set inde-
pendently of each other. For instance, if only full-scale cali-
bration is required, press the

(down arrow key) until the
gauge display indicates full-scale pressure. Press Enter and
proceed as indicated above. Calibration of zero, midscale
and full-scale is recommended when recalibrating the gauge.
ZERO EY (0bUTN): This feature allows the user to select
percent of full-scale at which the gauge can be rezeroed
using the Zero/Clear key on the keypad. Options include 5%
full-scale*, 10% full-scale or DISAB (disable of the zero key).
To use ZERO option:
Step 1: Press the M NU key on the keypad.
Step 2: Press the (up arrow key) or (down arrow
key) until the word CONFIG appears.
Step 3: Press NT R.
Step 4: nter user password, if it has been programmed.
Step 5: Press the (up arrow key) or (down arrow
key) until the word 0bUTN (zero key) appears.
Step 6: Press NT R.
Step 7: Press the (up arrow key) or (down arrow
key) to select 5PCT (5% full-scale), dISAb (disable zero
key) or 10PCT (10% full-scale).
Step 8: Press NT R to finalize the selection.
DISAB: or disable: This feature allows the user to dISAb
(or disable) or NAb (enable) items in the M NU. Some
keypad keys can also be enabled or disabled. Any or all
M NU items can be enabled or disabled.
To use DISAB option:
Step 1: Press the M NU key on the keypad.
Step 2: Press the (up arrow key) or (down arrow
key) until the word dISAb appears.
MENU FUNCTIONS
*Indicates default.
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MENU FUNCTIONS
Step 3: press NT R. The current setting ( NAB or dISAB)
will be displayed.
Step 4: Press the (up arrow key) or (down arrow
key) on the keypad to select a setting.
Step 5: Press NT R To finalize the setting.
GRAPH: This option allows the user to change the BAR
graph on the gauge display to correspond to any desired
pressure within the pressure limits of the gauge. This
option is useful when identifying a select portion of the
full-scale range of the gauge. The default setting for the
GRAPH is zero and full-scale pressure. For compound
gauges, the default setting for zero is set at full-scale vacu-
um. Full-scale pressure is set at the positive pressure as
displayed on the gauge keypad.
For gauges supplied with the 4-20mA output option, the
default is 4mA equals 0% of the bar graph and 20 mA
equals 100% of the bar graph.
Changing the bar graph to a pressure other than 0 and
100% of range will also change the 4-20mA output to cor-
respond with the new bar graph pressures for 0 and 100%.
To use GRAPH option:
Step 1: Press the M NU key.
Step 2: Press the (up arrow key) or (down arrow key)
on the keypad until the word until the word GRAPH appears.
Step 3: Press NT R . The gauge display will indicate the
set full scale pressure range setting on the top line. The
middle line indicates the bar graph at 100% of full-scale.
The bottom line of the display will indicate S TFS to set
the full-scale range as displayed by the bar graph and 4-
20mA.
Step 4: Press the (up arrow key) or (down arrow key)
on the keypad to increase or decrease gauge value at
100% of range.
*Indicates default.
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Step 5: Press the NT R key to finalize your choice. The
gauge display will now display S T. After two seconds the
screen will display the pressure value for 0% on the top
line. The middle line indicates the bar graph at 100% of
fullscale. The bottom line will display S T 0.
Step 6: Press the (up arrow key) or (down arrow
key) on the keypad to increase or decrease gauge value at
0% of range.
Step 7: Press the NT R key to finalize your choice. The
new values for the bar graph and 4/20mA settings have
now been saved.
OFF: This option sets the amount of time before the gauge will
turn itself off. Offerings are Never*, 30MIN,10MIN, 5MIN, 2
MIN.
To use the OFF option:
Step 1: Press the M NU key.
Step 2: Press the (up arrow key) or (down arrow
key) until the word OFF appears.
Step 3: Press NT R.
Step 4: Press the (up arrow key) or  (down arrow
key) to select the desired OFF time.
Step 5: Press the NT R key to finalize the OFF setting.
UPDATE: This option allows for changing the rate at which
pressure is updated on the display screen. This feature is
useful with rapid changes in process pressure that may
cause flutter of the display. Options are 100ms*, 1 sec,
500ms and 200ms, updates per second or 100ms*.
Since customer processes vary, update rates should be
selected based on the application.
To use the UPDATE option:
Step 1: Press the M NU key.
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MENU FUNCTIONS
*Indicates default.
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Step 2: Press the (up arrow key) or (down arrow
key) until the word UPDAT appears.
Step 3: Press NT R.
Step 4: Press the (up arrow key) or (down arrow
key) to select an update rate.
Step 5: Press NT R to finalize the selection.
DAMP or dampening: with five different options, this mode
allows for taking process pressure readings and averaging
them. This option is particularly useful to stabilize minor
process fluctuations. The options are NON *, AVG 8, AVG
6, AVG 4, AVG 2.
Step 1: Press the M NU key until the word dAMP appears.
Step 2: Press NT R.
Step 3: Press the (up arrow key) or  (down arrow
key) to select a dampening option.
Step 4: Press the NT R key to finalize your Damp option.
(This Menu item is only seen on units with the switch option)
SWSET: Allows for setting switch setpoints. The gauge is
offered with (1) or (2) SPDT switches. If (1) SPDT switch
is ordered the menu option is SW1. If (2) SPDT switches
are ordered, the M NU options are SW1 and SW2.
Step 1: Press the M NU key.
Step 2: Press the (up arrow key) or (down arrow
key) on the keypad to select the switch to be set. (If two
switches are present.)
Step 3: Press NT R. The top line of the gauge display will
indicate pressure at 60% of the full-scale gauge range* or
the most recent switch setpoint. The middle line of the dis-
play will indicate a bar graph that displays the pressure
MENU FUNCTIONS
*Indicates default.
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position within the pressure range. The bottom line will
display S TPT (blinking). S TPT is switch setpoint on
rising pressure.
Note: Setpoints are limited to the full-scale pressure range
of the gauge.
Step 4: Press the (up arrow key) or (down arrow key)
on the keypad to increase or decrease switch set-point
Step 5: Press the NT R key to finalize switch setpoint. The
gauge will display S T. After two seconds, the top line will
indicate R TRP pressure. The bottom line will read S T.
R TRP is switch setpoint on falling pressure.
Step 6: Repeat above to set R TRP (retrip value) If the
gauge is supplied with (1) setpoint, the screen will advance
to the measurement mode. If (2) switches are supplied the
display will advance to SW2.
Repeat the aforementioned if the gauge is supplied with
(2) switches.
Notes: The bar graph will increase or decrease as any
setpoint pressure is adjusted. The bar graph indicates
switch setpoint position within the full-scale pressure
range of the gauge.
The switch setpoint unit of pressure measurement corre-
sponds with the current set unit of measure of the gauge.
If gauge unit of measurement is changed after switch(es)
is set, switch setpoint(s) will automatically be updated to
correspond with revised unit of measurement. Switch
deadband is the difference between the S TPT (setpoint)
and the R TRP (retrip) pressure.
MENU FUNCTIONS
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Type: 2074 (battery), 2174 (loop), 2274 (line)
Accuracy: .25% Full Scale, terminal point
Case Size: 3˝, 41⁄2˝
Case Material: 3˝ SS, 41⁄2˝ fiberglass reinforced thermoplastic or
black epoxy coated aluminum
Case Encl. Rating: Weatherproof, IP65
Wetted Materials: 17-4 SS (sensor), 316SS (socket)
Socket Size: 1⁄4or 1⁄2NPT, JIS, DIN, SA , (1⁄2NPT only with 41⁄2˝ case,
others on application)
Socket Location: Lower, 3, 9 and 12 o’clock
Ranges: Vac. thru 20,000 psi (see engineering units below for other
units)
Operating Temp.: 14/140°F (10/60°C)
Storage Temp.: –4/158°F (-20/70°C)
DISPLAY
Type: LCD
Display Digits: Five (5)
Character Height: 3˝ .60˝, 41⁄2˝ .88˝
Backlite: Optional
Bar Graph: Yes
Battery Life: 3˝ >1000 hrs., 41⁄2˝ >3600 hrs.
Agency Approvals: C , FM* (Intrinsically Safe Class1, Div 1), CSA *FM is not
available with the following: 41⁄2˝ polypropylene case, SPDT
switch option(s) (XU1, U2) or Backlite (XBL) option)
KEYPAD FUNCTIONS
On/Off: Manually turns unit on and off (auto off options in menu)
Zero/Clear: Zeros display or clears min. and max. values when displayed
Min/Max (down) Stores min and max values, arrow key allows for
Arrow ey: scrolling thru menu items
Menu ey: Provides access to menu options
Backlite (up) Manually turns backlite on and off (auto off options in
Arrow ey: menu), arrow key allows for five menu options. (up)
(Backlite optional) arrow key allows for scrolling thru menu options
Enter: Selects items in the menu
MENU MODE
Engineering Units: 10 units of measurement are available; psi, In. H2O (with
three temp. options: 20°C, 60°F, 4°C*), Ft. H2O, mPa, mBar,
kPa, kg/cm2, Bar, inHg and mmHg
Configuration Mode Allows for changes to default settings of gauge
(Config): Including zero disable feaure
Bar Graph (Graph): Allows for adjustment of bargraph and 4-20
(optional feature)
Auto Off (Off): Allows for changes to auto off of gauge, five options:
Never, 2 min., 5 min., 15 min., 30 min.
Update Rate
(Update): Four options: 100 ms, 200 ms, 500 ms, 1 sec
Dampening (Damp): Six options: None, average, 2, 4, 6, 8 times per 100ms
Backlite: Five options: Never, 10 sec., 30 sec., 1 min., 5 min.
Field Recalibration: Allows for recalibration of zero, midscale and span
(password protected)
OPTIONS
4-20mA Display: 12-36 Vdc, mA with unlimited turndown (within gauge range)
Line Powered: 12-36 Vdc, 2VA max.
Switching*: (1) or (2) SPDT switches,(max. contact 30Vdc, 1 amp,
125Vac .5 Amp, Switches adjustable to 100% of range
DIGITAL INDUSTRIAL GAUGE SPECIFICATIONS
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DISPLAY MESSAGES:
Display/Problem Description Action
No Battery Icon
Display (applicable to
gauges with batteries
Gauge has <10%
battery life left Replace batteries
OFS T (blinking)
Zero/Clear button
pushed when pressure
displayed is beyond set
rezero pressure limit
Only rezero the gauge within
limits of setting in Menu
Menu button disabled Gauge is in
Max/Min mode
Push Max/Min button until
unit of measure is displayed
on keypad
Unit of measure
selected in Menu
displays N/A
Resolution at full scale
pressure range
exceeds 50,000 counts
Choose another unit of
measure
I can’t access items in
the main Menu
Items that cannot be
accessed have been
disabled
nable item(s) in the Menu.
See Menu/CONFIG and
diSAb or DISABL
I can’t set the
password I want
00000 is not a valid
password Select a different password
in.Hg Comp. mmHg in.Hg in. ft. Bar/
psi (vacuum) (psi) (pressure) (pressure) H2OmBar H2OmPa kPa SC
15 30 –15/0/15 800 30 400 1000 60 1 100 1
30 –15/0/30 1000 60 800 1500 160 1.6 160 1.6
60 –15/0/60 2000 100 1000 2000 200 2.5 250 2.5
100 –15/0/100 3000 160 2500 300 4 400 4
160 5000 200 4000 400 6 600 6
200 10,000 300 5000 600 10 1000 10
300 400 6000 1000 16 1600 16
600 600 10,000 25 2500 25
800 800 15,000 40 4000 40
1000 20,000 60 6000 60
1500 100 10,000 100
2000 140 16,000 160
3000 25,000 250
5000 40,000 400
8000 60,000 600
10,000 100,000 1000
15,000 140,000 1400
20,000
DIGITAL INDUSTRIAL GAUGE RANGES
Note: Rows listed are not the e uivalent of each other.
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LOOP+ LOOP–
T7
D9
D7
Y1
D10 C14 T9
U5
V1
F1D1
C3
C7
R7
R2
J1
1
1
J6
C2
R22 R20 C17
D11
U7
D14
D1
C15
R18
D5
R23
R24
D13
R14 R16
J3
J7
1
Q4
D16
D6
D15
D3
D12
T10 T12 T11
+24V GND EGND
FID3
321CO21–
D8
Q2
J5 J3
C4
R9 R10 R11 R12 R13
Q1 C10
C9
R6
C5
L1
U4
FO7 R8
FID4
V2
R1
R5
C1
R4 C6
C8
DQ/TB 2003
Y2
J2
FID2
V6
R21
Q3
T8
ECND
FID6
FID5
R19
Red (+ exec.) A
Black (– exec.) B
Battery Input
Keypad Input
Sensor Input
Shield
– 18 –
WIRING DIAGRAM
Loop Powered 4-20mA (Type 2174)
2 conductor, 20 AWG shielded
Installation Procedure for 2174:
SD precautions should be taken. See page 31 for details.
1. nsure all power is off/disconnected from the circuit.
2. Connect the red wire (A) to the positive power terminal.
3. Connect the black wire (B) to the positive terminal on the
meter.
4. Connect the negative side of the meter to the negative
power terminal.
Note: Meter should be installed on the black wire only.
+
+
–
POWER
SUPPLY
(+)
(–)
METER
PLC
SCADA
GAUGE
–
V+
V–
Red
Black
(A)
(B) (–)
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1000
750
500
250
0
620100 30
Load Limitations 4-20mA Output Only
RL-Loop Resistance in Ohms
Loop Supply Voltage (Vdc)
OPERATING
REGION
Vdc MIN = 12V + [0.022A X (RL) ]
RL= RS+ RW
RL= Loop Resistance (ohms)
RS= Sense Resistance (ohms)
Rw= Wiring Resistance (ohms)
I&M008-10109-DIG Rev F 07-12_l yout 10/14/13 9:45 AM P ge 19

– 20 –
WIRING DIAGRAM
Y1
V1
F1D1
C3
C7
R7
R2
J1
1
1
J6
C2
R22 R20 C17
D11
U7
D14
D1
C15
R18
D5
R23
R24
D13
R14 R16
J3
J7
1
Q4
D16
D6
D15
D3
D12
T10 T12 T11
+24V GND EGND
FID3
321CO21–
D8
Q2
J5 J3
C4
R9 R10 R11 R12 R13
Q1 C10
C9
R6
C5
L1
U4
FO7 R8
FID4
V2
R1
R5
C1
R4 C6
C8
DQ/TB 2003
Y2
J2
FID2
FID6
FID5
Shield
Black (–exec.) D
Red (+exec.) C
Battery Input
Keypad Input
Sensor Input
Line Powered (Type 2274)
2 conductor, 20 AWG shielded
Installation Procedure for 2274:
SD precautions should be taken. See page 31 for details.
1. nsure all power is off/disconnected from the circuit.
2. Connect the red wire (C) to the positive power terminal.
3. Connect the black wire (D) to the negative power terminal.
+
POWER
SUPPLY
(+)
(–)
GAUGE
–
V+
V–
Red (C)
Black (D)
I&M008-10109-DIG Rev F 07-12_l yout 10/14/13 9:45 AM P ge 20