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PD750-752 Temperature Panel Meter |
This product has been discontinued.
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GENERAL FEATURESPrecision Digital Temperature Meters handle temperature displaying, alarming and re-transmitting applications with simplicity, accuracy and reliability. These meters are available with up to 4 relays, isolated 4-20 mA output, and are factory calibrated for easy field selection of the thermocouple or RTD type. Just select your input type (J,K,T,E,R,S thermocouple, 100 ohm RTD, 10 ohm copper, or 120 ohm nickel), and either Fahrenheit or Celsius and connect the sensor.Easy Setup with One ButtonThese meters can be completely programmed using only one button. And you only do one thing with that one button: press it once when the meter displays what you want. For example, press the ENTER button to initiate an automatic scan of the various programming routines:  To enter one of these routines, press the ENTER button as the routine name is displayed. Once in the routine, press the ENTER button when the meter reads the desired value. It's that simple!Setup with One Button
NEMA 4X, IP65 Front PanelWet, dirty and dusty environments don't bother the NEMA 4X, IP65 front panel which allow these meters to be installed in almost any panel in the plant. That means plant operators can have the important information right where they need it most, on the shop floor.Big Bright Steady DisplayThese meters are great for displaying high temperatures because the steady and quick responding display can display 4½ digits of data. This allows thermocouples to be displayed above 2000°F and RTDs above 200.0° with a 0.1° resolution.CalibrationThe PD750 is shipped pre-calibrated for 6 types of thermocouples and 2 types of 100 ohm RTD sensors with 0.1° or 1° resolution. Although initial calibration is not necessary, these 8 input ranges may be re-calibrated in the field to improve accuracy (calibrator required.)The PD751 is pre-calibrated for 10 ohm copper RTD sensors and the PD752 is pre-calibrated for 120 ohm nickel RTD sensors. Pre-calibrated Ranges
Signal & Power Connections Visual Alarms StandardEvery temperature meter comes with 4 visual independent alarms. Each alarm is easily programmed for high or low set point and 0-100% deadband adjustment. Front panel LEDs assist in set point/reset point programming and are perfect for visual-indication-only applications. Options are available with 2 and 4 relays.Alarm/Relay ProgrammingPressing the ENTER button when the display reads initiates a scan of the alarm set and reset points. First, the display flashes Alarm #1 Set Point and indicates this by illuminating the #1 LED and the "S" LED. This Set Point may be changed using the ENTER button. Next the display flashes Alarm #1 Reset Point and indicates this by illuminating the #1 LED and the "R" LED. This Reset Point may also be changed using the ENTER button. The remaining Set and Reset Points are programmed in a similar fashion.
Alarm Status IndicationWhen an alarm occurs, an LED will illuminate to indicate which alarm has tripped. This LED will stay illuminated untilthe signal returns to the non-alarm state.  LED illuminated indicating that Alarm #2 is in alarm condition OPTIONSThese Universal Temperature Meters can be equipped with options for 2 or 4 relay contacts and isolated 4-20 mA transmitter output. These options may be combined in any configuration to satisfy a wide variety of applications. In fact, a fully loaded model PD750-3-18 includes 4 relays and isolated 4-20 mA transmitter output. Relay OptionsThese meters are available with 2 or 4 relays. The SPDT relays are rated 2 amp @ 250 VAC and can beprogrammed for automatic or automatic + manual reset. The relays can be programmed for 0-100% deadband adjustment. Isolated 4-20 mA Output OptionEquipped with an isolated 4-20 mA output signal option, these meters can be programmed to produce a 4-20 mA output signal for virtually any temperature input. The 4-20 mA output signal can be powered either by the internal or an external power supply. The 4-20 mA output provides 500 VDC or peak AC, input-to-output or input/output-to-power isolation.The isolated 4-20 mA output signal option transforms these meters into linearized, cold-junction compensated, temperature transmitters with a digital display.  PDA2446 explosion-proof enclosure shown with two PD765 Meters MOUNTING DIMENSIONS Notes: 1. Panel cutout required: 1.772″ x 3.622″ (45 mm x 92 mm) 1/8 DIN 2. Panel thickness: 0.125″ - 0.250″ (3.2 mm - 6.4 mm) 3. Clearance: allow 6 inches (152 mm) behind the panel SPECIFICATIONSExcept where noted all specifications apply to operation at +25°C.GeneralInputs: PD750: Field selectable: type J, K, T, E, R, S thermocouples with 1° resolution; type T to 0.1°; 100 Ω platinum RTD (0.00385 or 0.00392 curve) to 1° or 0.1° resolution. PD751: 10 Ω copper RTD, PD752: 120 Ω nickel RTDDisplay:0.56" (14.2 mm) red LED, 4½ digits; F or C may be switched on to indicate Fahrenheit or Celsius. Accuracy: See Pre-calibrated Ranges table in right column Cold Junction Reference: Automatic Front Panel: NEMA 4X, IP65; panel gasket provided Sensor Break: All relays and alarm status LEDs go to alarm state; open sensor circuit indicated by display flashing "Open". Hold Reading: Connect switch to ACK/HLD and COM terminals Lockout: Jumper JP2 restricts modification programmed settings Input Impedance: Greater than 100 k Ω Power Options: 115 VAC ±10%, 50/60 Hz, 10 VA; or 18-36 VDC, 6 W maximum. Isolation: AC power: 1500 VAC; DC power: 500 VDC Normal Mode Rejection: 64 dB at 50/60 Hz Operating Temperature: 0 to 60°C Storage Temperature: -40 to 85°C Relative Humidity: 0 to 90% non-condensing Enclosure: 1/8 DIN, high impact plastic, UL 94V-0, color: black Weight: 19.7 oz (559 g) (including options) Connections: Removable screw terminals accept 12 to 22 AWG Alarm Points: 4, any combination of high or low alarms Alarm Status Indication: Front panel LED Alarm Deadband: 0-100% FS, user selectable UL File Number:E160849; 508 Industrial Control Equipment (PD750 AC Powered Units Only) Warranty: 2 years parts & labor. RelaysRating: 2 or 4 Form C (SPDT); rated 2 A @ 30 VDC or 2 A @ 250 VAC resistive load; 1/14 HP @ 125/250 VAC inductive loads.Reset: User selectable 1. Automatic when the input passes the reset point. 2. Automatic plus manual (via front panel ACK button or user supplied switch). Manual reset resets all manually resettable relays. Fail-Safe Operation: Relay coils are energized in non-alarm condition. In case of power failure, relays will go to alarm state. To disable fail-safe operation remove jumper J2 located on the options board. Auto Initialization: When power is applied to the meter, the relays will always reflect the state of the input to the meter. Deadband: 0-100%, user selectable Isolated 4-20 mA Transmitter OutputScaling Range: Anywhere in range of meter, 501 count minimum span; reverse scaling allowed.Accuracy: ±0.1% FS ±0.004 mA Transmitter Supply: Isolated 24 VDC ±5% @ 20 mA Loop Resistance
External Loop Power Supply: 35 VDC maximum
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