Ashcroft Pressure Instruments
Handheld LCD Digital
Calibrator Type ATE-100 Pressure, Temperature, Voltage and Current Measurement
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Easily interchangeable "Quick Select"®
pressure and temperature modules
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Dual Display - simultaneous measurement and
display of pressure, temperature, voltage or current in any combination
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Pressure measurement accuracies of ±0.025%,
0.05% and 0.10% FS
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Pressure ranges from 0.25" H2O to 10,000 psi.
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Also measures temperature: supports most standard
RTD probes and thermocouples
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Min/max, tare, flow, leak, programmable damping,
percent function, RS232 output, battery check, switch test function, display
hold, mA & Vdc measurement capability... all standard
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Field calibration capability
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The Ashcroft ATE-100 is a measurement and
calibration system with a vast array of capabilities. These capabilities
extend far beyond those of precision pressure measurement. The base
unit contains a wide variety of application-specific firmware as well as
the ability to measure both current and voltage inputs. In addition,
this unit has the ability to interface the system with a computer, data
acquisition system or dumb terminal via the standard RS232 interface.
LCD Digital Indicator
Type ST-2A Pressure, Temperature, Voltage and Current Measurement
 Ordering Info
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Dual Display - simultaneous measurement and
display of pressure, temperature, voltage or current in any combination
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Pressure measurement accuracies of ±0.025%,
0.05% and 0.1% FS
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Pressure ranges from 0.25" H2O to 10,000 psi
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Easily interchangeable "Quick Select"®
pressure and temperature modules
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Multiple engineering units - 12 User-defined
engineering units - 1
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Temperature measurement with most standard
RTDs and thermocouples
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Programmable damping
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Tare capability
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Display hold
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RS232 two-way communications
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Standard NIST-traceable certificate of calibration
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Field recalibration capability
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The ST-2A is the perfect bench companion product
to the Ashcroft ATE-100 field handheld calibrator. This bench top
(or panel mounting) package shares the same pressure and temperature modules
and interfaces with the same software packages as the Ashcroft ATE-100.
An intuitive, menu-driven user interface puts all of the ST-2A's power
at the simple press of a key. It uses the AQS (Ashcroft Quick-Select™)
modular sensor system to provide the ultimate in measurement flexibility.
Pressure Tester Dual
Display LCD Digital Pressure Indicator
Ordering Info
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Can hold 2 sensors and display both readings
simultaneously
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Ranges: 0.25" H20 to 10,000 psi
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Accuracies from 0.1 to 0.025% FS
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Push-button zero adjust
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Max/min memory
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Selectable engineering units
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Variable damping
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Tare
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Port select
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Push-to-print
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RS232 I/O
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Field calibration capability
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The Ashcroft PT indicator is an extremely
versatile pressure measurement and test instrument. It can simultaneously
display the output of two pressure sensors, two RTD's or one of each.
It offers 12 standard user-selectable engineering units and one custom
value. Other dedicated front panel buttons make it easy to set zero,
check max/min values, adjust measurement damping, select either or both
ports for standard display, additive or differential display, print the
display and configure the RS232 output. All front panel features
are accessible via the RS232 port for remote configuration or data acquisition.
Volume Controller Type
AVC-1000 & 3000
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Ashcroft® precision-pressure volume
controllers provide a quick-and-easy method for precisely setting a pressure
in a closed pneumatic system. They are ideal for use with Ashcroft Type
1082 Test Gauges for the calibration of other pressure-measurement and
control devices.
The AVC unit consists of a volume chamber
with an internal piston assembly. The piston seals across the diameter
of the chamber. Once the AVC unit is connected to a pneumatic system, the
volume of the chamber becomes part of the volume of the system.
The pressure-adjust knob at the front of
the unit repositions the piston within the chamber through interaction
with a precision-machined lead screw. Piston movement within the chamber
increases or decreases the volume of the system, depending on the direction
of movement. In a closed system where gas cannot leak out upon compression
or be drawn in upon expansion, this volume change results in a change in
the internal pressure. Increasing the volume by moving the piston toward
the front of the AVC unit will decrease the pressure.
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Conversely, decreasing the volume by moving
the piston toward the rear of the unit will increase the pressure. The
pressure change generated by a given amount of piston travel is proportional
to the change in volume as compared to the total system volume.
AVC units are available for pressures up
to 3000 psi. The AVC-1000 can be used to set pressures from vacuum through
1000 psi while the AVC-3000 can be used for pressures from vacuum through
3000 psi.
An integral balance valve provides a means
for equalizing pressure on both sides of the piston prior to making the
final adjustments when setting the pressure. This minimizes the resistance
encountered when repositioning the piston and assures ease of pressure
setting, even at 3000 psi. The balance valve also serves as a pressure-relief
valve, assuring that the differential pressure across the piston does not
reach unsafe levels.
AVC units can also be used without a compressed
air source for the generation of moderate levels of positive pressure and
vacuum. The high resolution of the AVC, combined with the ability to generate
pressure and vacuum, make it an ideal tool for low-pressure (below 1 psi)
calibration and test as well as higher pressure calibration and test activities.
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