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 Validyne
DR800 Draft Range Pressure Transmitter
Draft
Range Pressure Transmitter Description
The Validyne DR800 Draft Range
Pressure Transmitter is designed exclusively for very low industrial
differential pressure measurements. It has a true full scale as
low as +/-0.25 In H2O without turndown or over-amplification.
Spans as low as 0.1 In H2O are possible with standard models.
Zero elevation and suppression adjustments allow calibration over
the precise range of interest. The DR800 Draft Range Pressure
Transmitter offers 0.5% FS accuracy and an operating temperature
range of -20 deg F to +185 deg F. The total combined temperature
effects are less than 3%/100 deg F.
 Simplified
zero and span adjustments provide a smooth and accurate calibration
even for extremely low differential pressures. Using a 20-turn
potentiometer adjustment and a circuit board jumper ranges can
be selected from -100% elevation to +85% zero suppression. The
span adjustment has a hi/lo jumper to allow faster full scale
calibration.
The DR800 Draft Range Pressure
Transmitter provides an industry-standard 4-20 mA analog signal
using any power supply from 12 to 45 Vdc. FM-approved models for
intrinsically safe service are available. Reverse polarity and
short circuit protection is included. Electronic damping with
a selectable time constant from 0.25 to 8 seconds smooths noisy
pressure signals. A loop-powered LCD local indicator is an available
option.
The
DR800 Draft Range Pressure Transmitter
Conforms to Industrial Standards:
- Gasketed, threaded covers on
NEMA 4 enclosure.
- Dual electrical cavities to
separate the field wiring from the electronics
- 2-1/8 inch centers on pressure
connections
- 410 SST wetted parts
Draft
Range Pressure Transmitter Applications:
- Steel Mill Re-Heat Furnace Draft
Control
- Glass Furnace Air Flow Control
- Ceramics Furnace Control
Draft
Range Pressure Transmitter Selected
Specifications
Ranges: +/-0.25 In H2O FS to
+/-100 In H2O FS in 9 models
Power Requirements: 12-45 Vdc Accuracy: 0.5% FS
Temperature Range: -20
to +185ºF
Temperature Effect: 3%/100 deg F, combined zero & span
Overpressure: to +/-5 psid Stability: +/-0.5%FS over 6 months
Pressure Connections: 1/4 inch or 1/2 inch NPT female on
2-1/8 inch centers
Enclosure: NEMA 4, 2 Inch pipe mounting available
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