Applications
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Overview
Precision Digital offers digital pressure gauges that will take a direct pressure input as well as digital meters that will accept the voltage or current output from a pressure transducer or transmitter. The digital pressure gauges are available in Precision Test, Industrial and General Purpose versions. They can be battery, loop or DC powered and have relays and analog outputs.
The digital meters will provide the power to drive the transmitter or transducer and can be field calibrated for display in engineering units. They are available in panel, NEMA 4X and explosion-proof configurations
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Digital Pressure Gauges
- Direct pressure input up to 20,000 psi
- Large up to 0.88" (22.4 mm) LCD
- Numeric & bargraph LCD
- Backlight feature for easy viewing
- 2 relays & 4-20 mA output options
- Battery, loop, or 12-36 VDC powered
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Digital Test Gauges
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PD253
PD243
PD233
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- Vacuum, compound pressure, 5 to 7,000 psi
- High accuracy 0.05% FS Total Error Band
- Available with 0.1% or 0.25% FS accuracy
- 5 digit LCD, % bargraph & battery level indication
- Large 0.66" (16.7 mm) display in compact 3" case
- Battery powered
- Intrinsically safe, Class I, Div 1
- Rugged & portable design
- Stainless steel case & socket welded
- Configurable options
- Twelve engineering units
- Seven languages
- Adjustable update rate
- Dampening with five settings
- Field calibration capability
- Password protected
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| General Purpose Digital Pressure Gauges |
- Vacuum, compound pressure, 30 to 19,999 psi
- 0.5% FS Terminal Point Accuracy
- 4½digit, 0.5" (12.7 mm) LCD
- Nine engineering units
- IP54 protective boot
- Battery powered
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PD202
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| Industrial Digital Gauges |
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- Digital gauge, pressure switch, & transmitter
- Vacuum, compound pressure, 15 to 20,000 psi
- 0.25% FS Terminal Point Accuracy (0.13% BFSL)
- 5 digit LCD, % bargraph & battery level indication
- IP54 protective boot
- Large 0.6" (15.2 mm) or 0.88" (22.4 mm) LCD
- 4-20 mA output & 2 Form C relays
- Three case options:
- stainless steel
- aluminum
- fiberglass reinforced thermoplastic
- NEMA 4, IP65 case
- Battery, loop, or 12-36 VDC powered
- Intrinsically safe, Class I, Div 1
- Password protected menus
- Easy-to-use menu options
- Five backlight settings
- Twelve engineering units
- Menu configure feature
- Update rate
- Dampen mode
- Auto off
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Compound Pressure
Compound pressure is easily measured on an analog gauge by changing the scale on the gauge to reflect the non-linearity of combining the vacuum and positive pressure ranges. However, this is more difficult on a digital meter and can only be accomplished if the meter has provisions for multi-point calibration. The following illustrates measuring compound pressure using an analog gauge and a digital meter connected to a pressure transmitter.
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| An analog gauge is scaled from 30 to 0 and then 0 to 60. |
The PD655 is set up for three points of calibration so it can display both vacuum and positive pressure
| 4 | mA | = | -30.00 | inHg |
| 6.05 | mA | = | 0.00 | |
| 20.00 | mA | = | 60.00 | psi |
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Local Pressure Display & Remote PC Monitoring |
Say you have an application where you want to display the pressure from 6 vessels right on the shop floor and also display the data and collect it on your computer back in your office. You can do this with Precision Digital's Trident meter and MeterView® software. We can provide the enclosure and engraved labels so that you have everything you need! MeterView software even allows you to remotely acknowledge relays. |
- Up to 100 pressure inputs
- Remote PC Display
- Data Acquisition
- Acknowledge relays remotely
- Save data to a file
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Click here to view the MeterView video
Dialup | Broadband |
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Products:
PD765 & MeterView®
orLabVIEW
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Vacuum measurement in power plant |
| "The indicators are not just for good looks but they serve an important function when the operators are pulling bottom ash. The controls for the vacuum pumps are remote from the boiler fronts and the pumps them-selves are on sixth floor while the indicators are on grade floor. The indicators display bottom ash vacuum so the operators have instant status of the vacuum system running. The large indicator was our solution to help the operators and help prevent plugging the system when ash was being ‘pulled’.” |
Products: PD650,
PD692,
PD655,
PD656
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Pressure measurement in a Div 2 area |
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The pressure transducers in the lower part of the photograph are connected to the PD675 loop-powered meters mounted in the panel. The PD675 is approved for Division 2 locations
Other pressure related products approved for Division 2 locations include:
PD661,
PD686,
PD688,
& Digital Pressure Gauges |
Dual Input Pressure Indicator |
- 2 Analog inputs
- AC, DC, battery, loop power
- Displays pressure, units and input ID at same time
- NEMA 4X or panel mount
- Backlight available
- Modbus communication
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Fluidwell F151 Diplay |
Dual Input Pressure Indicator schema
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Annunciator for pressure switches |
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Products: PD154 &
PD158 Vigilante II Annunciators
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The Vigilante® II annunciators are compact, panel-space
saving, easy to use annunciators available in models
to handle either four or eight pressure switches. Each
switch can have its own custom message, such as "Low
Oil Pressure", on the Vigilante. When a pressure
switch trips, the LED for that input flashes, a horn
sounds and a relay transfers. The Vigilante annunciator
can even indicate which switch tripped first.
- Monitors four or eight pressure switches
- First-out indication for troubleshooting
- Powers the pressure switch
- Free custom message labels
- Built-in horn
- Two Form C 2 A relays
- Shallow Depth 1/8 DIN Case
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