PRECISION DIGITAL Loop Leader PD683 User manual

PD683 & PD688
LOOP-POWERED METERS
PRECISION DIGITAL CORPORATION
19 Strathmore Road • Natick MA 01760 USA
Tel [phone] • Fax [phone] www.predig.com
• 2 V drop (5.7 V with backlight)
• 5 Digit LCD, 0.6" (15.2 mm) High
• Custom Engineering Units
• 20 Segment Bargraph Display
• Type 4X, NEMA 4X, IP65 Front
• Maximum/Minimum Display
• Linear, Square Root, or Programmable Exponent
Loop-
Powered
Backlight
Standard!
• Non-Volatile Memory – No Battery Needed

PD683 & PD688 Loop-Powered Meters Instruction Manual
Disclaimer
The information contained in this document is subject to change
without notice. Precision Digital makes no representations or war-
ranties with respect to the contents hereof, and specifically disclaims
any implied warranties of merchantability or fitness for a particular
purpose.
Registered Trademarks
NORYL®and LEXAN®are a registered trademarks of General Elec-
tric Company. All other trademarks mentioned in this document are
the property of their respective owners.
© 2006 Precision Digital Corporation. All rights reserved.
Visit our Web Site
http://www.predig.com
2

PD683 & PD688 Loop-Powered Meters Instruction Manual
INTRODUCTION
The PD688 is an intrinsically safe loop-powered digital meter. The
PD683 is a general purpose loop-powered digital meter for safe area
applications. The four front panel buttons make the setup and pro-
gramming an easy task. Five digits, bargraph, engineering units, and
trend arrows provide a clear and attractive presentation of the process.
The PD688 offers intrinsically safe and non-incendive approvals for
hazardous locations.
The square root and programmable exponent functions allow for condi-
tioning of outputs from non-linear transmitters without adding external
components to the system and the convenience of scaling without a
signal source makes the PD683/PD688 an ideal choice for process dis-
play.
ORDERING INFORMATION
Model Description
PD683-0K0 Loop-Powered Panel Meter for Safe Area
PD684-0K1 Loop-Powered Rate/Totalizer for Safe Area
PD688-0K0 FM & CSA Approved Loop-Powered Panel Meter
PD689-0K1 FM & CSA Approved Loop-Powered Rate/Totalizer
Enclosures and Accessories
Model # of
Meters Description Mounting
PDA2407 1 Plastic NEMA 4X Enclosure Inside Cover
PDA2409 3 Plastic NEMA 4X Enclosure Inside Cover
PDA2410 4 Plastic NEMA 4X Enclosure Inside Cover
PDA2601 1 Stainless Steel NEMA 4X Enclosure Through Door
PDA2602 2 Stainless Steel NEMA 4X Enclosure Through Door
PDA2603 3 Stainless Steel NEMA 4X Enclosure Through Door
PDA2604 4 Stainless Steel NEMA 4X Enclosure Through Door
PDA2605 5 Stainless Steel NEMA 4X Enclosure Through Door
PDA2606 6 Stainless Steel NEMA 4X Enclosure Through Door
PDA2701 1 Steel NEMA 4 Enclosure Through Door
PDA2702 2 Steel NEMA 4 Enclosure Through Door
PDA2703 3 Steel NEMA 4 Enclosure Through Door
PDA2704 4 Steel NEMA 4 Enclosure Through Door
PDA2705 5 Steel NEMA 4 Enclosure Through Door
PDA2706 6 Steel NEMA 4 Enclosure Through Door
PDA2801 1 Plastic NEMA 4X Enclosure Through Cover
3

PD683 & PD688 Loop-Powered Meters Instruction Manual
Table of Contents
INTRODUCTION------------------------------------------------------------ 3
ORDERING INFORMATION--------------------------------------------- 3
SPECIFICATIONS---------------------------------------------------------- 6
General-------------------------------------------------------------------------------6
Input-----------------------------------------------------------------------------------7
PD688 COMPLIANCE INFORMATION------------------------------- 8
Ratings and Approvals ---------------------------------------------------------8
SAFETY INFORMATION ------------------------------------------------- 8
INSTALLATION------------------------------------------------------------- 9
Unpacking---------------------------------------------------------------------------9
Panel Mounting--------------------------------------------------------------------9
PD683 Connections------------------------------------------------------------ 10
4-20 mA Input Connections------------------------------------------------ 11
SETUP AND PROGRAMMING ----------------------------------------12
Front Panel Buttons and Status Indicators---------------------------- 13
Display Functions and Messages----------------------------------------- 14
Main Menu ------------------------------------------------------------------------ 15
Setting Numeric Values ------------------------------------------------------ 15
Setting Up the Meter (setup)------------------------------------------------ 16
Setting the Decimal Point (deC.pt) --------------------------------------- 16
Setting the Units Display (units)----------------------------------------- 17
Programming the Meter (prog)--------------------------------------------- 18
Scaling the Meter (sCalE)-------------------------------------------------- 19
Calibrating the Meter (Cal)------------------------------------------------- 20
Recalibrating Internal Sense Circuitry (ICal) ------------------------- 20
Setting Up the Bargraph (GrapH)----------------------------------------- 21
Setting Up the Password (pass) ------------------------------------------- 22
Locking the Meter ------------------------------------------------------------ 22
Unlocking the Meter---------------------------------------------------------- 23
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PD683 & PD688 Loop-Powered Meters Instruction Manual
Advanced Features Menu---------------------------------------------------- 24
Advanced Features Menu & Display Messages---------------------- 25
Functions (lnear, Squar, Prog.E, Cutof) -------------------------------- 26
Contrast (contr)-------------------------------------------------------------- 27
Noise Filter (fltEr)---------------------------------------------------------- 27
Noise Filter Bypass (bypAs) ----------------------------------------------- 27
Internal Calibration (ICal)-------------------------------------------------- 28
Information Menu (info)---------------------------------------------------- 29
OPERATION----------------------------------------------------------------30
Front Panel Buttons Operation -------------------------------------------- 30
Maximum/Minimum Readings---------------------------------------------- 31
MOUNTING DIMENSIONS----------------------------------------------32
Reset Meter to Factory Defaults------------------------------------------- 33
Factory Defaults & User Settings----------------------------------------- 34
TROUBLESHOOTING----------------------------------------------------35
Troubleshooting Tips --------------------------------------------------------- 35
QUICK USER INTERFACE REFERENCE GUIDE----------------36
OTHER PRECISION DIGITAL PRODUCTS------------------------39
Table of Figures
Figure 1. Panel Cutout and Mounting.................................................9
Figure 2. Rear View ............................................................................10
Figure 3. PD683 Input Connections with Backlight.........................11
Figure 4. PD683 Input Connections without Backlight ...................11
Figure 5. Meter Dimensions – Side View..........................................32
Figure 6. Case Dimensions – Top View............................................32
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PD683 & PD688 Loop-Powered Meters Instruction Manual
SPECIFICATIONS
Except where noted all specifications apply to operation at +25°C.
General Five digits
(-99999 to 99999) 0.60" (15.2 mm) high, 7-segment, automatic lead zero blanking.
Four digits
(Engineering Units) 0.25" (6.4 mm) high, 14 segment.
Bargraph 20-segment, 0% to 100% indication.
Trend arrows Up and down trend indication.
DISPLAY
Backlight Orange (intensity varies with signal)
DISPLAY
UPDATE RATE 2.5/second
OVERRANGE Display flashes 99999
UNDERRANGE Display flashes -99999
PROGRAMMING
METHOD Four front panel buttons
NOISE FILTER Programmable from 1 to 199
RECALIBRATION Recalibration is recommended at least every 12 months.
MAX/MIN
DISPLAY Max/min readings reached by the process are stored until reset by the user or until power to the meter is turned off.
PASSWORD Programmable password restricts modification of
programmed settings.
NON-VOLATILE
MEMORY All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
Without Backlight With BacklightVOLTAGE DROP
2.0 V maximum 5.7 V maximum
NORMAL MODE
REJECTION 64 dB at 50/60 Hz
ENVIRONMENTAL Operating temperature range: -30 to 65°C (-40°C allowed)
Storage temperature range: -40 to 65°C
Relative humidity: 0 to 90% non-condensing
CONNECTIONS Removable screw terminals accept 12 to 22 AWG wire
ENCLOSURE &
MATERIALS 1/8 DIN, high impact plastic, UL 94V-0, color: gray GE Plastics NORYL® N190X Polyphenylene Ether &
Polystyrene blend (PPE PS) Resin
GE Plastics LEXAN® HP92W Polycarbonate (PC) Film
6

PD683 & PD688 Loop-Powered Meters Instruction Manual
MOUNTING 1/8 DIN panel cutout required. Two panel mounting
bracket assemblies provided
TIGHTENING
TORQUE Screw terminal connectors: 4.5 lb-in (0.5 Nm) Mounting screws: 8.0 lb-in max. (0.9 Nm)
OVERALL
DIMENSIONS 2.45" x 4.68" x 4.19" (62 mm x 119 mm x 106 mm) (H x W x D)
WEIGHT 8.0 oz (227 g)
WARRANTY 3 years parts and labor
EXTENDED
WARRANTY 1 or 2 years, refer to Price List for details
Input
ACCURACY ±0.03% of span ±1 count,
square root and programmable exponent: 10-100% FS
FUNCTION Linear, square root, or programmable exponent
LOW-FLOW
CUTOFF -99999 to 99999 (-99999 disables cutoff function)
TEMPERATURE
DRIFT 50 PPM/°C from -40 to 65°C ambient
DECIMAL POINT Up to four decimal places:
d.dddd, dd.ddd, ddd.dd,dddd.d,or ddddd
CALIBRATION
RANGE An Error message will appear if input 1 and input 2 signals
are too close together.
Input
Range Minimum Span Input 1 & Input 2
4-20 mA 0.40 mA
Without Backlight With Backlight
EQUIVALENT
RESISTANCE 125 Ω@ 20 mA 315 Ω@ 20 mA
INPUT
OVERLOAD Over current protection to 2 A max.
7

PD683 & PD688 Loop-Powered Meters Instruction Manual
PD688 COMPLIANCE INFORMATION
Ratings and Approvals
FM Class I, Div 1, 2, Groups ABCD
Class II, Div 1, Groups EFG
Class II, Div 2, Groups FG
Class III, Div 1, 2
Class 1, Zone 0, Group IIC
CSA Class I, Div 1, 2, Groups ABCD
Class II, Div 1, Groups EFG
Class II, Div 2, Groups FG
Class III, Div 1, 2
Class 1, Zone 0, Group IIC
PD688 Installation must be performed in
accordance with Control Drawing
LIM688-2
SAFETY INFORMATION
!
CAUTION: Read complete
instructions prior to installation
and operation of the meter.
Installation and service should be performed only by trained
service personnel. Service requiring replacement of internal
components must be performed at the factory.
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PD683 & PD688 Loop-Powered Meters Instruction Manual
INSTALLATION
There is no need to remove the meter from its case to com-
plete the installation, wiring, and setup of the meter.
Unpacking
Remove the meter from box. Inspect the packaging and con-
tents for damage. Report damages, if any, to the carrier.
If any part is missing or the meter malfunctions, please contact
your supplier or the factory for assistance.
Panel Mounting
• Prepare a standard 1/8 DIN panel cutout – 3.622" x 1.772" (92 mm
x 45 mm). Refer to Mounting Dimensions, page 32 for more details.
• Clearance: allow at least 4" (102 mm) behind the panel for wiring.
• Panel thickness: 0.04" - 0.25" (1.0 mm - 6.4 mm).
Minimum steel/stainless steel panel thickness to maintain watertight
rating: 0.06" (1.5 mm).
Note: A steel or stainless steel panel rather than plastic is
recommended in cases where a watertight or dust-tight seal is
required between the meter and the panel.
• Remove the two mounting brackets provided with the meter (back-off
the two screws so that there is ¼" (6.4 mm) or less through the
bracket. Slide the bracket toward the front of the case and remove).
• Insert meter into the panel cutout.
• Install mounting brackets and tighten the screws against the panel.
To achieve a proper seal, tighten the mounting bracket screws
evenly until meter is snug to the panel along its short side. DO NOT
OVER TIGHTEN, as the rear of the panel may be damaged.
Panel
Gasket
Mounting
Bracket Mounting Screw
Removable
Connector
3.622" (92mm)
1.772"
(45mm) Panel Cutout
to DIN 43700
Square Corners to 0.060"
(1.5mm) Max Radius
A
B
Tolerances:
A: +0.032 (+0.8mm)
-0.000 (-0.0mm)
B: +0.024 (+0.6mm)
-0.000 (-0.0mm)
9
Figure 1. Panel Cutout and Mounting

PD683 & PD688 Loop-Powered Meters Instruction Manual
PD683 Connections
Signal connections are made to a four-terminal removable connector. This
section is only intended for PD683.
PD688 Installation must be performed in accordance with Control
Drawing LIM688-2 in order to meet agency approval ratings.
!
Observe all safety regulations. Electrical wiring
should be performed in accordance with all agency
requirements and applicable national, state, and
local codes to prevent damage to the meter and
ensure personnel safety.
S+ S- B+ B-
Figure 2. Rear View
10

PD683 & PD688 Loop-Powered Meters Instruction Manual
4-20 mA Input Connections
Input connections are made to a four-terminal connector labeled
S+|S-|B+|B-. The loop-powered backlight is an optional configuration and
requires a total maximum voltage drop of 5.7 V. The backlight is recom-
mended for dim lighting conditions and is enabled when wired as shown
in Figure 3. It may be bypassed if installed in bright lighting conditions to
reduce the maximum voltage drop to 2.0 V as shown in Figure 4.
It may be necessary to short S+ to S- for a few seconds after pow-
ering the circuit in order for the meter to boot correctly. This is
encountered when using a capacitive power supply with slow
turn-on.
S
+
S
- B+ B-
4-20 mA
Transmitter
Power
Supply
Figure 3. PD683 Input Connections with Backlight
S
+
S
- B+ B-
4-20 mA
Transmitter
Power
Supply
Figure 4. PD683 Input Connections without Backlight
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PD683 & PD688 Loop-Powered Meters Instruction Manual
SETUP AND PROGRAMMING
• There is no need to recalibrate the meter for
milliamps when first received from the factory.
• The meter is factory calibrated for milliamps
prior to shipment. The calibration equipment
is certified to NIST standards.
Overview
There are no jumpers involved in the setup process of the meter.
Setup and programming is done through the front panel buttons.
After all connections have been completed and verified, apply power to
the loop.
For
Quick User Interface Reference Guide
go to page 36
12

PD683 & PD688 Loop-Powered Meters Instruction Manual
Front Panel Buttons and Status Indicators
ACKMAXRESET
MENU
Button
Symbol Description Symbol Status
Menu 0% Bargraph mini-
mum
Right arrow/Reset 100% Bargraph
maximum
Up arrow/Max Increasing trend
Enter/Ack Decreasing trend
• Press the Menu button to enter or exit the Programming Mode at
any time.
• Press the Right arrow button to move to the next digit or decimal
position during programming.
• Press the Up arrow button to scroll through the menus, decimal
point, or to increment the value of a digit.
• Press the Enter/Ack button to access a menu or to accept a setting.
• Press and hold the Menu button for five seconds to access the
Advanced features of the meter.
13

PD683 & PD688 Loop-Powered Meters Instruction Manual
Display Functions and Messages
The meter displays various functions and messages during
setup/programming and operation. The following table shows the dis-
played functions and messages with their action/setting description.
Display Parameter Action/Setting
setuP Setup Enter Setup menu
DeC..pt Decimal point Set decimal point
units Units Enter the Units menu
prog Program Enter the Program menu
sCalE Scale Enter the Scale menu
Cal Calibrate Enter the Calibrate menu
inpt1 Input 1 Calibrate input 1 signal or program input 1
value
DspL1 Display 1 Program display 1 value
inpt2 Input 2 Calibrate input 2 signal or program input 2
value
DsPl2 Display 2 Program display 2 value
Error Error Error, calibration not successful, check signal
graph Graph Enter the Graph menu
Pass Password Enter the Password menu
unloc Unlocked Program password to lock meter
Locd Locked Enter password to unlock meter
99999
-99999 Flashing
display Overrange condition
Underrange condition
14

PD683 & PD688 Loop-Powered Meters Instruction Manual
Main Menu
The main menu consists of the most commonly used functions: Setup,
Program, and Password.
• Press Menu button to enter Programming Mode then press Up
arrow button to scroll main menu.
9.2846GPS setup prog pass
Run
Mode
• Press Menu, at any time, to exit and return to Run Mode. Changes
made to settings prior to pressing Enter/Ack are not saved.
• Changes to the settings are saved to memory only after pressing
Enter/Ack.
• The display moves to the next menu every time a setting is
accepted by pressing Enter/Ack.
Setting Numeric Values
The numeric values are set using the Right and Up arrow buttons.
Press Right arrow to select next digit and Up arrow to increment digit.
The digit being changed blinks.
Press the Enter/Ack button, at any time, to accept a setting or Menu
button to exit without saving changes.
04.000 04.000 05.000
Increment Digit
Value
Next
Setting
Select Next Digit Accept Setting
The decimal point is set using the Right or Up arrow button in the
Setup-decimal point menu. 15

PD683 & PD688 Loop-Powered Meters Instruction Manual
Setting Up the Meter (setup)
The Setup menu is used to select:
1. Decimal point position
2. Engineering units display
Press the Enter/Ack button to access any menu or press Up arrow but-
ton to scroll through choices. Press the Menu button to exit at any time.
setuP deC.Pt units
Setting the Decimal Point (deC.pt)
Decimal point may be set with up to four decimal places or with no
decimal point at all.
Pressing the Right or Up arrow moves the decimal point one place to
the right until no decimal point is displayed, then it moves to the left
most position.
deC.pt ddddd Next
Select Decimal
Point
Previous
or
16

PD683 & PD688 Loop-Powered Meters Instruction Manual
Setting the Units Display (units)
The meter can be set to display a combination of three alphanumeric
characters for engineering units or for identification (eg. PSI, G/S, LpM,
TK3, ,L7). There is also a fourth alphanumeric character located above
this row, which supports a degrees symbol and “x10” symbol (eg. °C,
°F, x103, x106, x109).
Press Right arrow to select next unit and Up arrow to increment unit.
The unit being changed blinks.
Press the Enter/Ack button, at any time, to accept a setting or Menu
button to exit without saving changes.
D
aBC
Increment
Character
Next
Setting
Select Next
Character Accept Setting
D
aBC
D
aCC
17

PD683 & PD688 Loop-Powered Meters Instruction Manual
Programming the Meter (prog)
It is very important to read the following information, before proceeding
to program the meter:
• There is no need to recalibrate the meter for milliamps when first
received from the factory.
• The meter is factory calibrated for milliamps prior to shipment.
The calibration equipment is certified to NIST standards.
• Use the Scale menu to enter scale parameters without applying a
live signal.
• Alternatively, use the Calibrate menu to apply a signal (transmitter
output) and scale from measured outputs.
The Program menu contains the Calibrate and the Scale menus.
Inputs may be calibrated or scaled to any display within the range of the
meter.
prog SCAle CAL GrapH
Additional parameters, not needed for most applications, are pro-
grammed with the Advanced features menu, see Advanced Features
Menu, page 24.
Error Message (Error)
An error message indicates that the calibration or scaling process was
not successful.
After the error message is displayed, the meter reverts to input 1, allow-
ing the appropriate input signals to be applied.
The error message might be caused by one of the following conditions:
1. Minimum input span requirements not maintained.
2. Input 1 signal inadvertently applied to calibrate input 2.
Minimum Input Span
The minimum input span is the minimum difference between input 1 and
input 2 signals required to complete the calibration or scaling of the me-
ter. The minimum span is 0.40 mA.
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PD683 & PD688 Loop-Powered Meters Instruction Manual
Scaling the Meter (sCalE)
The 4-20 mA input can be scaled to display the process in engineering
units.
A signal source is not needed to scale the meter; simply program the
inputs and corresponding display values.
dsPL1
Press Enter to Accept Setting
inpt2
Scale
Input 2
inpt1
Set Input 1
Value
sCalE
04.000
Set Display 1
Value
Press Up to Set Digit Value
Press Right to Select Next Digit
Press Menu to Exit at any Time
0.0000
For instructions on how to program
numeric values see Setting Numeric
Values, page 15.
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PD683 & PD688 Loop-Powered Meters Instruction Manual
Calibrating the Meter (Cal)
To scale the meter without a signal
source refer to Scaling the Meter
(sCalE), page 19.
The meter can be calibrated to display the process in engineering units
by applying the appropriate input signal and following the calibration
procedure.
The use of a calibrated signal source is strongly recommended.
inpt1 dspl1 04.000
Set Display 1
Value
inpt2
Calibrate
Input 2
Cal
Display
Flashes
Accepting
Input
Press Enter to Accept Setting
Press Up to Set Digit Value
Press Right to Select Next Digit
Press Menu to Exit at any Time
1. Press the Up arrow button to scroll to the Calibration menu (CAL)
and press Enter/Ack.
2. The meter displays inpt1. Apply a known signal and press En-
ter/Ack. Trend arrows are displayed while accepting the signal.
3. After the signal is accepted, the meter displays dspl1. Press En-
ter/Ack, enter a corresponding display value for the signal input,
and press Enter/Ack to accept.
4. The meter displays inpt1. Apply a known signal and press En-
ter/Ack. Trend arrows are displayed while accepting the signal.
5. After the signal is accepted, the meter displays dspl2. Press En-
ter/Ack, enter a corresponding display value for the signal input,
and press Enter/Ack to accept.
Recalibrating Internal Sense Circuitry (ICal)
20
The Internal Calibration (ICAL) menu, located in the Advanced features
menu, is used to recalibrate the current input. Recalibration is recom-
mended at least every twelve months. Refer to Internal Calibration
(ICal), page 28 for instructions.