Model PD751

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   Specifications   Order Info

Shown with optional green display

Features / Options

Models PD750 - PD751 - PD752 - All Models

Model PD750

Handles Thermocouple and RTD Inputs

J,K,T,E,R, & S Thermocouples

Platinum RTD (0.00385 or 0.00392 curve)

Type T T/C and RTD's displayed to 0.1^o

Display F or C

NEMA 4X Front Panel

2 or 4 Relays + 4-20 mA Output Option

Scan multiple inputs with the PD118

Model PD751

10 ohm Copper RTD Input

Display F or C to 0.1^o

NEMA 4X Front Panel

2 or 4 Relays + 4-20 mA Output Option

Model PD752

120 ohm Nickel RTD Input

Displays F or C to 0.1^o

NEMA 4X Front Panel

2 or 4 Relays + 4-20 mA Output Option

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

Options

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 4-20mA Transmitter Output

4-20 mA or 20-4 mA Output

500 VDC Isolation

Can be Scaled over Narrow Range

With or Without Relay Contacts

The PD750, equipped with the isolated 4-20 mA output signal option turns the unit into a temperature transmitter with a digital display. This 4-20 mA signal is linearized, cold junction compensated and may be scaled for practically any range.

Signal & Power Connections

PD750 Four Wire RTD Connections

PD750 Three Wire RTD Connections

PD750 TwoWire RTD Connections

PD750 Thermocouple Connections

Pre-calibrated Ranges

Input: Range: Accuracy:

Type J -328^o to 1382^oF
-200^o to 750^oC +/-1.4^oF
+/-0.8^oC

Type K -328^o to 2498^oF
-200^o to 1330^oC +/-1.7^oF
+/-0.9^oC

Type T -328^o to 2498^oF
-200^o to 750^oC +/-1.5^oF
+/-0.8^oC

Type E -328^o to 2498^oF
-200^o to 750^oC +/-1.4^oF
+/-0.8^oC

Type R -328^o to 2498^oF
-200^o to 750^oC +/-4.8^oF
+/-2.7^oC

Type S -328^o to 2498^oF
-200^o to 750^oC +/-5.7^oF
+/-2.9^oC

100 ohm Pt RTD -328^o to 2498^oF
-200^o to 750^oC +/-0.6^oF
+/-0.3^oC

10 ohm Cu RTD -328^o to 2498^oF
-200^o to 750^oC +/-0.2^oF
+/-0.1^oC

120 ohm Ni RTD -328^o to 2498^oF
-200^o to 750^oC +/-0.2^oF
+/-0.1^oC

Top   Features   Specifications   Order Info

Ordering Information

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

Top   Features   Specifications   Order Info

Specifications

Basic Meter

INPUTS: Field selectable: type J,K,T,E,R, or S thermocouples with 1^o resolution; type T to 0.1^o; 100 ohm platinum (0.00385 or 0.00392 curve), 10 ohm copper or 120 ohm nickel RTDs with 1^o or 0.1^o 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.

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.

Top   Features   Specifications   Order Info

Input:	Range:	Accuracy:
Type J	-328^o to 1382^oF -200^o to 750^oC	+/-1.4^oF +/-0.8^oC
Type K	-328^o to 2498^oF -200^o to 1330^oC	+/-1.7^oF +/-0.9^oC
Type T	-328^o to 2498^oF -200^o to 750^oC	+/-1.5^oF +/-0.8^oC
Type E	-328^o to 2498^oF -200^o to 750^oC	+/-1.4^oF +/-0.8^oC
Type R	-328^o to 2498^oF -200^o to 750^oC	+/-4.8^oF +/-2.7^oC
Type S	-328^o to 2498^oF -200^o to 750^oC	+/-5.7^oF +/-2.9^oC
100 ohm Pt RTD	-328^o to 2498^oF -200^o to 750^oC	+/-0.6^oF +/-0.3^oC
10 ohm Cu RTD	-328^o to 2498^oF -200^o to 750^oC	+/-0.2^oF +/-0.1^oC
120 ohm Ni RTD	-328^o to 2498^oF -200^o to 750^oC	+/-0.2^oF +/-0.1^oC

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

Features / Options

All Models

4 Visual Alarms Standard

Options

2 or 4 Relays

Isolated 4-20mA Transmitter Output

Signal & Power Connections

Pre-calibrated Ranges

Ordering Information

Specifications

Basic Meter

Relays

Isolated 4-20 mA
Transmitter Output

Model PD751, PD752,
& PD753

	AC power:	115 VAC +/-10%, 50/60 Hz, 10VA. 230 VAC +/-10%, 50/60 Hz, 10VA.
	DC power:	18-36 VDC, 6 watts max.

	Loop Resistance
Power Supply	Min	Max
24 VDC	10 ohm	600 ohm
36 VDC (external)	600 ohm	1000 ohm

Model PD751, PD752, & PD753

Features / Options

All Models

4 Visual Alarms Standard

Options

2 or 4 Relays

Isolated 4-20mA Transmitter Output

Signal & Power Connections

Pre-calibrated Ranges

Ordering Information

Specifications

Basic Meter

Relays

Isolated 4-20 mA Transmitter Output

Model PD751, PD752,
& PD753

Isolated 4-20 mA
Transmitter Output