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Test & Measurement
Instruments
PD8-7000 ProtEX-MAX Explosion-Proof Temperature Meter
The ProtEX-MAX™ PD8-7000 offers all the functionality of the ProVu PD7000 as a fully FM, CSA, ATEX, and IECEx approved explosion-proof product. It accepts a direct temperature input from a wide range of temperature measurement devices (type J, K, T, E, R, S, B, N, and C thermocouples and 100 or 1000 Ω platinum, 10 Ω copper, 120 Ω nickel RTDs). It displays the measured temperature in either degrees Fahrenheit or degrees Celsius on a dual-line, 6-digit Sunbright sunlight readable display. The meter includes automatic cold junction compensation for thermocouples and the ability to average up to ten (10) RTD sensors. The PD8-7000 can be equipped with up to four internal relays and a 4-20 mA analog output. It can be programmed and operated without opening the housing by using the built-in SafeTouch® through-glass buttons or the RS485 serial communication port with free Modbus® protocol.
Quick Overview
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Features
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Specifications & Spare Parts
General
| Display | Upper display: 0.60″ (15 mm) high. Lower display: 0.46″ (12 mm) high. Both are 6 digits (-99999 to 999999), red LEDs. |
| Resolution | 1° (up to four digits) or 0.1° (up to five digits) |
| Display Intensity | Eight intensity levels |
| Display Update Rate | 5/second (200 ms) |
| Programming Methods | Four through-glass SafeTouch buttons, four mechanical buttons behind glass, digital inputs, PC and MeterView Pro software, or Modbus registers. |
| F4 Digital Input Contacts | 3.3 VDC on contact. Connect normally open contacts across F4 to COM. |
| F4 Digital Input Logic Levels | Logic High: 3 to 5 VDC; Logic Low: 0 to 1.25 VDC |
| Noise Filter | Programmable from 2 to 199 (0 will disable filter) |
| Filter Bypass | Programmable from 0.1 to 99.9% of span |
| Recalibration | Recommended at least every 12 months. |
| Max/Min Display | Max / min temperature readings are stored until reset by the user or until power to the meter is cycled. |
| Non-Volatile Memory | All programmed settings are stored in nonvolatile memory for a minimum of ten years if power is lost. |
| Power Options | 85-265 VAC 50/60 Hz, 90-265 VDC, 20 W max, or optional model with 12-24 VDC ±10%, 15 W max. |
| Normal Mode Rejection | Greater than 65 dB at 50/60 Hz |
| Isolation | 4 kV input/output-to-power line. 500 V input-to-output |
| Environmental |
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| Max Power Dissipation | Maximum power dissipation limited to 15.1 W. |
| Connections | Removable screw terminal blocks accept 12 to 22 AWG wire, RJ45 for external relays, digital I/O, and serial communication adapters. |
| Enclosure | Explosion-proof die cast aluminum with glass window, corrosion-resistant epoxy coating, color: blue. NEMA 4X, 7, & 9, IP68. Default conduit connections: Four ¾” NPT threaded conduit openings and two ¾” NPT metal conduit plugs with 12 mm hex key fitting installed. Additional conduit opening configurations may be available; verify quantity and sizes on specific device labeling during installation. |
| Mounting | Four slotted flanges for wall mounting or NPS 1½” to 2½” or DN 40 to 65 mm pipe mounting |
| Dimensions | 6.42″ x 7.97″ x 8.47″ (W x H x D) (163 mm x 202 mm x 215 mm) |
| Weight | 16.0 lbs (7.26 kg) |
| Warranty | 3 years parts & labor |
| USB Connection |
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Temperature Input
| Inputs | Thermocouple J, K, T, E, R, S, B, N, C; RTD 100 Ω platinum (0.00385 & 0.00392 curves), 10 Ω copper, 120 Ω nickel, 1000 Ω platinum |
| Input Impedance | Greater than 100 kΩ |
| Offset Adjust | User programmable offset adjust ±50.0 degrees |
| Temperature Drift | ±2°C maximum from 0 to 65°C ambient temperature; ±4°C maximum from -20 to 0°C ambient temperature |
| Sensor Break | Display flashes “Open”, relays can be programmed to go “On”, “Off”, or to “Ignore” (detected as an upscale condition). |
| Averaging | Up to 10 RTDs connected in parallel can be averaged. |
| Type | Range (°F) | Range (°C) | Accuracy |
|---|---|---|---|
| J | -200 to 2000 | -129 to 1093 | ±1°C |
| K | -200 to 2400 | -129 to 1316 | ±1°C |
| T | -200 to 752 | -129 to 400 | ±1°C |
| E | -200 to 1800 | -129 to 982 | ±1°C |
| R | -50 to 3000 | -46 to 1649 | ±2°C |
| S | -50 to 3000 | -46 to 1649 | ±2°C |
| B | 752 to 3300 | 400 to 1816 | ±2°C |
| N | -100 to 2300 | -73 to 1260 | ±2°C |
| C | 32 to 4100 | 0 to 2260 | ±2°C |
| 10 Ω | -328 to 500 | -200 to 260 | ±0.1°C |
| 100 Ω | -328 to 1562 | -200 to 850 | ±0.4°C |
| 120 Ω | -110 to 500 | -79 to 260 | ±0.1°C |
| 1000 Ω | -328 to 900 | -200 to 482 | ±0.4°C |
Relays
| Rating | 2 or 4 SPDT (Form C) internal and/or 4 SPST (Form A) external; rated 3 A @ 30 VDC and 125/250 VAC resistive load; 1/14 HP (≈ 50 watts) @ 125/250 VAC for inductive loads such as contactors, solenoids, etc. |
| Noise Suppression | Noise suppression is recommended for each relay contact switching inductive loads. |
| Deadband | 0-100% of span, user programmable |
| High or Low Alarm | User may program any alarm for high or low trip point. Unused alarm LEDs and relays may be disabled (turned off). |
| Relay Operation | automatic (non-latching), latching (requires manual acknowledge), sampling (based on time), pump alternation control (2 to 8 relays), Off (disable unused relays and enable interlock feature, manual on/off control mode). |
| Time Delay | 0 to 999.9 seconds, on & off relay time delays. Programmable and independent for each relay. |
| Fail-Safe Operation | Programmable and independent for each relay. Note: Relay coil is energized in non-alarm condition. In case of power failure, relay will go to alarm state. |
| Auto Initialization | When power is applied to the meter, relays will reflect the state of the input to the meter. |
Isolated 4-20 mA Transmitter Output
| Output Source | PV (temperature), max, min, set points 1-8, manual control setting, or Modbus input | |||||||||
| Scaling Range | 1.000 to 23.000 mA for any display range | |||||||||
| Calibration | Factory calibrated 4-20 mA output | |||||||||
| Accuracy | ±0.1% of span ± 0.004 mA | |||||||||
| Temperature Drift | 0.4 µA/°C max from 0 to 65°C ambient, 0.8 µA/°C max from -40 to 0°C ambient Note: Analog output drift is separate from input drift. |
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| Isolated Transmitter Power Supply | Terminals I+ & R: 24 VDC ± 10%. Isolated from the input at >500 V. May be used to power the 4-20 mA output or other devices. All models @ 25 mA max. | |||||||||
| External Loop Power Supply | 35 VDC maximum | |||||||||
| Output Loop Resistance |
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Serial Communications
| Compatibility | EIA-485 |
| Connectors | Removable screw terminal connector |
| Max Distance | 3,937′ (1,200 m) max |
| Status Indication | Separate LEDs for Power (P), Transmit (TX), and Receive (RX) |
| Protocol | Modbus® RTU |
| Meter Address/Slave ID | 1 – 247 |
| Baud Rate | 300 – 19,200 bps |
| Transmit Time Delay | Programmable between 0 and 199 ms or transmitter always on for RS-422 communication |
| Data | 8 bit (1 start bit, 1 or 2 stop bits) |
| Parity | Even, odd, or none with 1 or 2 stop bits |
| Byte-to-Byte Timeout | 0.01 – 2.54 seconds |
| Turn Around Delay | Less than 2 ms (fixed) |
Digital Inputs and Outputs
| Channels | 4 digital inputs & 4 digital outputs per module |
| System | One expansion module may be added for a total of 8 inputs & 8 outputs Note: The jumper located between the RJ45 connectors must be removed on the expansion module. |
| Digital Input Logic: High | 3 to 5 VDC |
| Digital Input Logic: Low | 0 to 1.25 VDC |
| Digital Output Logic: High | 3.1 to 3.3 VDC |
| Digital Output Logic: Low | 0 to 0.4 VD |
| Source Current | 10 mA maximum output current |
| Sink Current | 1.5 mA minimum input current |
| +5 V Terminal | To be used as pull-up for digital inputs only. Connect normally open pushbuttons across +5 V & DI 1-4. Warning: DO NOT use +5 V terminal (pin 1) to power external devices. |
| Function Assignment | The on-board digital inputs (1-4) are designed to mimic the behavior of the front panel buttons (Menu, F1, F2, & F3). If you wish to change their behavior, re-assign F1-F3 to the desired function, then change the corresponding digital input to match. |
4-Relay Expansion Module
| Relays | Four Form A (SPST) rated 3 A @ 30 VDC and 125/250 VAC resistive load; 1/14 HP (approx. 50 watts) @ 125/250 VAC for inductive loads. |
Product Ratings and Approvals
| FM Enclosure | Type 4X; IP66 Class I, Division 1, Groups B, C, D Class II, Division 1, Groups E, F, G Class III, Division 1, T5/T6 Class I, Zone 1, AEx d, IIC Gb T5/T6 Zone 21, AEx tb IIIC T90°C; Ta -40°C to +65°C T6 Ta = -40°C to +60°C; T5 Ta = -40°C to +65°C Certificate Number: 3047283 |
| CSA | Class I, Division 1, Groups B, C, D Class II, Division 1, Groups E, F, G Class III, Division 1 Class I Zone 1 Ex d IIC Zone 21 Ex tb IIIC T90°C -40°C < Tamb. < +60° C; Temperature Code T6 -40°C < Tamb. < +65° C; Temperature Code T5 Enclosure Type 4X & IP66 Certificate Number: 2531731 |
| ATEX | II 2 G D Ex d IIC T* Gb Ex tb IIIC T90°C Db IP68 Ta = -40°C to +*°C *T6 = -40°C to +60°C *T5 = -40°C to +65°C Certificate number: Sira 12ATEX1182 |
| IECEx | Ex d IIC T* Gb Ex tb IIIC T90°C Db IP68 Ta = -40°C to +*°C *T6 = -40°C to +60°C *T5 = -40°C to +65°C Certificate Number: IECEx SIR 12.0073 |
