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ST-2A Digital Indicator

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Data Sheet

SPECIFICATIONS

Available Pressure

Measurement

Accuracies:

AQS-1 Module Type:

±0.06% (0.07%) or 0.1% of span

AQS-2 Module Type:

±0.025%, 0.05% or 0.1% of span

Display:

Standard: Alphanumeric LCD, 0.37-inch height,

2 lines, 16 characters/line

Optional: Backlit LCD

Display Resolution:

±0.002% of span, 60,000 counts (max)

Display Update Rate:

130 ms (nominal) with one sensor installed

Engineering Units:

psi, in. H

2O, in. Hg, ftSW, bar, mbar, kPa, MPa,

mm Hg, cm H

2O, mm H2O and kg/cm

2

and any

single user-programmable engineering unit

Damping:

Programmable averaging from zero through

16 consecutive readings

Standard Operating

Range:

32 °F to 120 °F (0 °C to 49 °C)

Compensated Range:

20 °F to 120°F (-7 °C to 49 °C)

Reference Temperature 70 °F ±3 °F

Standard Temperature

Effect:

0.004% of span per degree Fahrenheit over the

compensated range

Optional Extended

Temperature

Compensation:

AQS-2 Quick-Select™ modules are available

calibrated to maintain rated accuracy over the

20 °F to 120 °F (-7 °C to 49 °C) compensated

temperature range.

Storage Temperature:

-4 °F to +158 °F (-20 °C to 70 °C)

Electrical Sourcing:

24 Vdc at 25 mA

Electrical Measurement

Specification::

Input (volts) Accuracy:

0/10 Vdc ±0.025% of span

0/30 Vdc ±0.10% of span

Input (mA) Accuracy:

0/20 mA ±0.03% with of span

Temperature Effects

Electrical Measurement:

±0.001% of span per °F over the compensated

range (Reference temp. 70 °F ± 3 °F)

FEATURES

Benchtop indicator able to measure up to

3 parameters; pressure, temperature, voltage

or current

Interchangeable pressure modules with pressure

ranges from 0.25 in. H2O up to 10,000 psi

Measurement accuracy +/- 0.1%, 0.05% or

0.025% of span

RS232 serial communication

Traceable calibration certificate included with

base and modules

ST-2A

Digital Indicator

KEY BENEFITS

• Measurement flexibility of interchangeable Quick- Select™

calibrator modules

• Built in functions including leak detect, flow measurement

and datalogging

Weight: ST-2A Base

unit:

3.0 lb (1.4 kg)

Housing:

Molded, high-impact ABS case

Electrical Connections: Standard banana jacks

Optional Battery Power

Supply:

5 “AA” nicads with built-in charger or

5 “AA” alkaline (nonrechargeable)

Portable (Battery)

Operation:

20 hours with optional backlight

off, 2 hours with backlight on

External Power Supply: AC adaptor 9 Vdc, 500 mA

Warm-up:

5 minutes for rated accuracy (maximum),

30 minutes for complete stability

RS232 Serial Interface

With 9-pin D type at 300, 1200, 2400, 9600 baud.

Field Calibration:

Calibration module and proper pressure and

electrical standards are required

Optional Data Logging

Capacity:

Standard measurements: 714 records

Date/time stamped measurements: 384 records

Provides prompts for storage of calibration history

information, including instrument tags

As Found/As Left data and corresponding

ambient temperature

SPECIFICATIONS CONTINUED