- 4-20 mA Input
- Modern, Sleek and Practical Enclosure
- 3½ Digits, 1″ (25.4 mm) Display
- Display Mountable at 0°, 90°, 180°, & 270° Degrees
- Easy Calibration and Installation
- Loop-Powered Backlight Option
- 1 V Drop (4 V with Backlight)
- Explosion-Proof, IP68, NEMA 4X Enclosure
- Flanges for Wall or Pipe Mounting
- HART® Protocol Transparent
- Operates from -40 to 75°C
Precision Digital PD6870 Loop-Powered Process Meter
Large digits Explosion-Proof Loop-Powered Process Meter with Backlight
The Precision Digital ProtEX FarVu PD6870 is an explosion-proof, loop-powered process meter with 1″ display digits in a field-mountable enclosure designed for demanding applications in hazardous areas or in the harshest environmental conditions. The meter derives all of its power from the 4-20 mA loop with a small 1 V drop so there is no need to run additional, costly power lines into a hazardous area. Like all ProtEX products, the PD6870 loop-powered indicator carries FM, CSA, ATEX, and IECEx approvals for use in hazardous areas. It is programmed using four easy-to-access, front-mounted control dials.
Product Ratings & Approvals
Display: 3½ digit LCD, 1″ (25.4 mm); -1,999 to 1,999
Display Update Rate: 2.5 Updates/Second
Display Orientation: Display may be mounted at 90° increments up to 270° from default orientation
Overrange: Display reads 1 on the left most digit
Programming Method: Four front mounted trim potentiometers accessed when the cover is removed.
Recalibration: Recommended at least every 12 months.
Normal Mode Rejection: 60 dB rejection ratio
Operating Temperature Range: -40 to 75°C
Storage Temperature Range: -40 to 75°C
Relative Humidity: 0 to 90% non-condensing
Connections: Screw terminals accept 12 to 22 AWG wire
Enclosure: Explosion-proof die cast aluminum with glass window, 0.30% max copper content, corrosion resistant epoxy coating, color: blue. NEMA 4X, IP68. Two ¾” NPT threaded conduit openings. One ¾” NPT nickel plated brass conduit plug with 10 mm hex key fitting installed.
Mounting: May be mounted directly to conduit. Two slotted flanges for wall mounting or NPS 1½” to 2½” or DN 40 to 65 mm pipe mounting.
Overall Dimensions: 5.65″ x 5.25″ x 4.86″ (144 mm x 133 mm x 124 mm) (W x H x D)
Weight: 5.00 lbs (80 oz, 2.27 kg)
Warranty: 3 years parts and labor
Input: 4-20 mA
Accuracy: ±0.1% of full span ±1 count
Temperature Drift: 150 PPM/°C from -40 to 75°C ambient
Decimal Point: User selectable decimal point
Calibration Range: 4 mA input: -1000 to +1000; 20 mA between 20 and 2000 counts greater than 4 mA display. Two point linear display span.
Maximum Voltage Drop: 1 VDC @ 20 mA without backlight; 4 VDC @ 20mA with loop-powered backlight
Input Overload: Over current protection to 2 A max.
HART Transparency: Analog input will not interfere with existing HART communications on the wired 4-20 mA signal
Loop-Powered Backlight Option: Factory installed only. Powered directly from the 4-20 mA loop, no batteries required. Backlight can be enabled or disabled via alternative wiring of terminal block. The display brightness will increase as the input signal current increases.
Product Ratings & Approvals
FM: Explosion-proof for use in Class I, Division 1, Groups B, C, D. Class II, Division 1, Groups E, F, G. Class III, Division 1; T6. Class I, Zone 1, AExd IIC T6 Gb. Zone 21, AEx tb IIIC T85°C. Ta = -40 to 75°C.
Enclosure: Type 4X & IP66. Certificate number: 3040391
ATEX: II 2 G D. Ex d IIC T6 Gb. Ex tb IIIC T85°C Db IP68. Ta = -40 to 75°C.
Certificate number: Sira 10ATEX1116X
IECEx: IECEx SIR 10.0056X. Ex d IIC T6 Gb. Ex tb IIIC T85 C Db IP68. Ta = -40 to 75°C
CSA: Class I, Division 1, Groups B, C, D. Class II, Division 1, Groups E, F, G. Class III, Division 1; T6. Class I, Zone 1, Ex d IIC T6.
Ta = -40 to 75°C. Enclosure: Type 4X & IP66.
Certificate number: 11 2325749
PD6870 Input Connections with Loop-Powered Backlight