Model PD751, PD752,
& PD753
Precision Digital's Universal Temperature
Meters handle temperature displaying, alarming and re-transmitting applications with
simplicity, accuracy and reliability. The PD750 is available with up to 4 relays, isolated
4-20 mA output, and is factory programmed for easy field selection of the thermocouple or
RTD type. Just select your input type (J,K,T,E,R,S thermocouple or 100 ohm RTD), and
either Fahrenheit or Celsius and connect the sensor. The PD751 accepts 10 ohm copper while
the PD752 accepts 120 ohm nickel RTD inputs.
- Features
- Ordering Information
- Specifications
- Options
- Signal & Power Connections
Model PD750 |
Model PD751 |
Model PD752 |
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All Models
4 Visual Alarms Standard
- Front Panel Alarm Status Indicator
- Perfect for Visual-indication-only Applications
- Any Combination of High or Low Set Points
- 0-100% Deadband Adjustment
| Model: | Description: | |
| 115 VAC *PD750-3-N *PD750-3-14 *PD750-3-15 PD750-3-16 PD750-3-17 PD750-3-18 |
230 VAC PD750-4-N PD750-4-14 PD750-4-15 PD750-4-16 PD750-4-17 PD750-4-18 |
No Options 2 Relays 4-20 mA Output 2 Relays + 4-20 mA Output 4 Relays 4 Relays + 4-20 mA Output |
| 18-36 VDC PD750-2-N PD750-2-14 PD750-2-15 PD750-2-16 PD750-2-17 PD750-2-18 |
No Options 2 Relays 4-20 mA Output 2 Relays + 4-20 mA Output 4 Relays 4 Relays + 4-20 mA Output |
|
| 115 VAC PD751-3-N PD751-3-14 PD751-3-15 PD751-3-16 PD751-3-17 PD751-3-18 |
230 VAC PD751-4-N PD751-4-14 PD751-4-15 PD751-4-16 PD751-4-17 PD751-4-18 |
10 ohm Copper RTD No Options 2 Relays 4-20 mA Output 2 Relays + 4-20 mA Output 4 Relays 4 Relays + 4-20 mA Output |
| 18-36 VDC PD751-2-N PD751-2-14 PD751-2-15 PD751-2-16 PD751-2-17 PD751-2-18 |
No Options 2 Relays 4-20 mA Output 2 Relays + 4-20 mA Output 4 Relays 4 Relays + 4-20 mA Output |
|
| 115 VAC PD752-3-N PD752-3-14 PD752-3-15 PD752-3-16 PD752-3-17 PD752-3-18 |
230 VAC PD752-4-N PD752-4-14 PD752-4-15 PD752-4-16 PD752-4-17 PD752-4-18 |
120 ohm Nickel RTD No Options 2 Relays 4-20 mA Output 2 Relays + 4-20 mA Output 4 Relays 4 Relays + 4-20 mA Output |
| 18-36 VDC PD752-2-N PD752-2-14 PD752-2-15 PD752-2-16 PD752-2-17 PD752-2-18 |
No Options 2 Relays 4-20 mA Output 2 Relays + 4-20 mA Output 4 Relays 4 Relays + 4-20 mA Output |
Basic Meter
- INPUTS: Field selectable: type J,K,T,E,R, or S thermocouples with 1o resolution; type T to 0.1o; 100 ohm platinum (0.00385 or 0.00392 curve), 10 ohm copper or 120 ohm nickel RTDs with 1o or 0.1o resolution.
- DISPLAY: Bright, large, 0.56" (14.2mm) high efficiency red or green LED, 41/2 digits. F or C may be switched on to indicate Fahrenheit or Celsius.
- COLD JUNCTION REFERENCE: Automatic, fixed, no user calibration needed.
- T/C OPEN INDICATION: Open thermocouple circuit indicated by flashing display. Status of relays determined by setting.
- HOLD READING: Connect switch to ACK/HLD and COM terminals, also connect jumper pins at rear.
- INPUT IMPEDANCE: Greater than 100 Kohms.
- NON-VOLATILE MEMORY: All programming values are stored in non-volatile memory for ten years if power is lost.
- POWER:
| AC power: | 115 VAC +/-10%, 50/60 Hz, 10VA. 230 VAC +/-10%, 50/60 Hz, 10VA. |
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| DC power: | 18-36 VDC, 6 watts max. |
- ENCLOSURE: 1/8 DIN, high impact plastic, UL 94V-0.
- FRONT PANEL: NEMA 4X, panel gasket provided.
- CONNECTIONS: Removable screw terminal block (provided), accepts 24 to 12 AWG.
- ALARM POINTS: 4, any combination of high or low alarms.
- ALARM STATUS INDICATION: Front panel LED
- ALARM DEADBAND:> 0-100% of full scale, field selectable.
- UL FILE NUMBER: E160849; 508 Industrial Control Equipment. (PD750 only).
Relays
- RATING: 2 or 4 relays; 2 Amp SPDT (form C). The contacts are rated 2 Amp @ 30 VDC or 2 Amp @ 250 VAC resistive load; 1/14 HP @ 125 / 250 VAC for NC contacts and 1/10 HP @ 125 / 250 VAC for NO contacts, inductive load.
- RESET: User Select. 1. Automatically when the input passes the reset point. 2. Automatically + manually (via user supplied switch or front panel ACK button).
- FAILSAFE OPERATION: The relay coils are energized in the non-alarm condition. In the case of a power failure, the relays will go to the alarm state. May be disabled with internal jumper.
- 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 Output
- CALIBRATION RANGE: Anywhere in range of meter, 501 count minimum span.
- OUTPUT LOOP RESISTANCE:
| Loop Resistance | ||
| Power Supply | Min | Max |
| 24 VDC | 10 ohm | 600 ohm |
| 36 VDC (external) | 600 ohm | 1000 ohm |
- EXTERNAL LOOP POWER SUPPLY: 35 V max.
- ACCURACY: +/-0.1% FS, +/-004 mA.
- ISOLATION: 500 VDC or peak AC, input-to-input or input/output-to-power line.
2 or 4 Relays
- 2 or 4 SPDT, 2 amps @ 250 VAC Resistive Load
- Automatic or Automatic + Manual Reset
- Failsafe Action & Auto Initialization
- 0-100% Deadband Adjustment
Isolated 4-20 mA Transmitter Output
- 4-20 mA or 20-4 mA Output
- 500 VDC Isolation
- Can be Scaled over Narrow Range
- With or Without Relay Contacts
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Pre-calibrated Ranges
| Input: | Range: | Accuracy: |
| Type J | -328o to 1382oF -200o to 750oC |
+/-1.4oF +/-0.8oC |
| Type K | -328o to 2498oF -200o to 1330oC |
+/-1.7oF +/-0.9oC |
| Type T | -328o to 2498oF -200o to 750oC |
+/-1.5oF +/-0.8oC |
| Type E | -328o to 2498oF -200o to 750oC |
+/-1.4oF +/-0.8oC |
| Type R | -328o to 2498oF -200o to 750oC |
+/-4.8oF +/-2.7oC |
| Type S | -328o to 2498oF -200o to 750oC |
+/-5.7oF +/-2.9oC |
| 100 ohm Pt RTD | -328o to 2498oF -200o to 750oC |
+/-0.6oF +/-0.3oC |
| 10 ohm Cu RTD | -328o to 2498oF -200o to 750oC |
+/-0.2oF +/-0.1oC |
| 120 ohm Ni RTD | -328o to 2498oF -200o to 750oC |
+/-0.2oF +/-0.1oC |
North California Office :- 285-A Bel Marin Keys Blvd - Novato, CA - 94949 PH: (415) 382 - 9710 FAX: (415) 382 - 9720