cecomp.com
1220 American Way Libertyville, IL 60048
Phone:
800-942-0315
Fax: 800-949-7502
Instructions F16AD,
F16ADN
BSOLUTE
ROCESS
NSTRUMENTS, Inc.
Division of
Read these instructions before using the gauge. Configuration
may be easier before installation. Contact the factory for assis-
tance.
These products do not contain user-serviceable parts. Contact
us for repairs, service, or refurbishment.
Gauges must be operated within specified ambient temperature
ranges.
Outdoor or wash down applications require a NEMA 4X gauge or
installation in a NEMA 4X housing.
Use a pressure or vacuum range appropriate for the application.
Use fittings appropriate for the pressure range of the gauge.
Due to the hardness of 316 stainless steel, it is recommended
that a thread sealant be used to ensure leak-free operation.
For contaminated media use an appropriate screen or filter to
keep debris out of gauge port.
Remove system pressures before removing or installing gauge.
Install or remove gauge using a wrench on the hex fitting only.
Do not attempt to turn gauge by forcing the housing.
Good design practice dictates that positive displacement liquid
pumps include protection devices to prevent sensor damage
from pressure spikes, acceleration head, and vacuum extremes.
Avoid permanent sensor damage! Do not apply vacuum to non-
vacuum gauges or hydraulic vacuum to any gauges.
Avoid permanent sensor damage! NEVER insert objects into
gauge port or blow out with compressed air.
Gauges are not for oxygen service. Accidental rupture of sensor
diaphragm may cause silicone oil inside sensor to react with
oxygen.
Bipolar ranges read positive pressure and vacuum in the same
units, and zero with the gauge port open.
1000 psi and higher sensor are a sealed reference type. They read
zero with the gauge port open are internally referenced to 14.7 psi.
Functionally similar to gauge reference sensors.
Absolute reference gauges read zero at full vacuum and atmo-
spheric pressure with the gauge port open. With an open gauge
port the readings will vary continuously due to the effects of
barometric pressure.
Range Codes
The range code is part of the gauge model number and indicates
the default range when the gauge is ordered.
Selectable Ranges
Engineering units may be changed to any of those listed in the same
sensor range as shown in the range table.
Conversion
Engineering units are calculated from the factory default unit to the
newly selected units. The ranges listed under the psi sensor range
are rounded off.
The AD series is powered by 8-24 VAC 50/60 Hz or 9-32 VDC.
The type and magnitude of the supply voltage have negligible
effects on the gauge calibration as long as it is within the voltage
ranges stated above. No polarity needs to be observed when con-
necting a power supply. An inexpensive unregulated low voltage AC
or DC power supply can be used.
After the gauge is installed, route the wires away from heat sources
and moving equipment and connect the low-voltage power source
to the gauge wires.
Ensure that the gauge supply voltage does not fall below 8 VAC
RMS
if AC power is used, or 9 VDC if DC power is used. Operation with
less than these values may cause erratic or erroneous readings.
When operating multiple gauges from the same power supply, refer
to the mA rating in the specifications to ensure adequate power.
Note that standard 24 VAC transformers with small loads often
operate at voltages well over the gauge's 24 VAC limit.
Power-Up
Press and hold the front button for approximately 1 second.
The display is tested, the default full-scale range is indicated, the
full-scale range in the selected units are indicated, the display is
tested again, then the actual pressure and units are displayed.
Power-Up With Zero
This applies to gauge reference models only. Absolute reference
gauges do not use the zero feature since they read atmospheric
pressure under normal conditions.
Be sure the gauge port is exposed to normal atmospheric pressure
and no pressure is applied. The zeroing function is only activated
at each power-up and the stored zero correction is erased when
the gauge is shut off.
Press and hold the front button. The display is tested and then oooo
is displayed. The gauge is now zeroed. Release the button and the
full-scale range in the selected units are indicated, the display is
tested again, then the actual pressure and units are displayed.
Attempting to zero the gauge with pressure greater than approxi-
mately 3% of full-scale pressure or vacuum applied will result in an
error condition, and the display will alternately indicate Err 0 and
the actual measured pressure. The gauge must be powered down
to reset the error condition.
Normal Operation
Following the start-up initialization, the display indicates the pres-
sure reading updated approximately 3 times per second. The gauge
may be left on continuously or shut off as desired.
If excessive vacuum is applied to a pressure-only gauge, the display
will indicate -Err until the vacuum is released.
Applying vacuum to a gauge designed for pressure may damage
the pressure sensor. If excessive pressure is applied (112.5% over
range), an out-of-range indication of 1 – – – or 1.–.–.– will be
displayed depending on model.
Display Backlighting (BL models only)
Display backlighting is on whenever the gauge is on.
The display backlighting will not be apparent under bright lighting
conditions.
Minimum and Maximum Readings
Gauges are normally configured with minimum and maximum
capture functions enabled. One or both can be disabled in the User
Configuration mode.
Minimum and maximum readings are continuously stored and
updated whenever the gauge is on. The stored readings can be
manually cleared if desired. The MAX and MIN memory is also
cleared whenever the gauge is off unless configured to save the
readings.
Press and hold the button for about 1 second until MAX is displayed
alternating with the units. The maximum reading will be continu-
ously updated. The gauge may be left in this mode.
After MAX is displayed, press and hold the button for about 1 sec-
ond until MIN is displayed alternating with the units. The minimum
reading will be continuously updated. The gauge may be left in this
mode. If excessive vacuum is applied to a pressure-only gauge
while in this mode, the display will indicate -Err until the MAX/MIN
readings are cleared.
After MIN is displayed, press and hold the button again for about 1
second until * * * * is displayed. The MAX and MIN memory is not
erased and the gauge returns to normal operation with the display
indicating the current reading.
Press and continue to hold the button until the display indicates clr
MX/MN (about 3 seconds total) and then release the button. Both
maximum and minimum values are cleared and the gauge returns
to the normal mode and displays the current pressure.
Shut-Down
To shut off the gauge manually at any time, press and hold the button
until the display indicates OFF (about 5 seconds) and then release.
Operation—continued
Types of Gauges
Installation Precautions
Dimensions
Operation
Cecomp maintains a constant effort to upgrade and improve its products.
Specifications are subject to change without notice. Consult factory for your
specific requirements.
Selectable Ranges
¼" NPT
2.88"
3.38" Standard
3.5" NEMA 4X
0.75"
2.0"
Cecomp Electronics / Made in USA
1.65"
NEMA 4X
3.0"
Standard
Turn at hex
fitting only
X X X X X
88888
2
Low voltage
indicator
3 ft long 2
conductor 22
AWG cable with
stripped and
tinned wire
ends
Turn at hex
fitting only
Function
Button
Prompt (Release Button)
On
Press for 1
second
Display test > default units > selected
units
FUll scale
> display test >
actual reading
Zero
(gauge ref.
only)
Press and
hold
Display test >
oooo
> default units >
selected units
FUll scale
>
display test > actual reading
Hi reading
Press/hold
Max
> max. reading & units
Lo reading Press/hold
MIN
> min. reading & units
Exit Hi/Lo
Press/hold
> actual reading
Clear Hi/Lo Press/hold
Max
>
Clr mx/mn
> actual reading
Clear, off
Press/hold
Max
>
Clr mx/mn
>
OFF
Power
MOD-TRONIC Instruments
·
Brampton, ON
·
905-457-6322 or 1-800-794-5883
·
·
www.mod-tronic.com
