www.predig.com
Precision Digital corPoration
19 Strathmore Road • Natick MA • 01760 • USA • Tel: (800) 343-1001 • Fax: (508) 655-8990
LDS689_C 11/06
speciFications
Except where noted all specifications apply to operation at +25°C.
General
ModeL pd684 & pd689 Loop-powered rate/totaLizers
YoUr LocaL distriBUtor is:
Display:
5 digit LCD (-99999 to 99999), 0.60" (15.2 mm) high,
7-segment, automatic lead zero blanking.
Engineering Units:
0.25
"
(6.4 mm) high, 14-segment
Bargraph
: 20-segment, 0-100% indication
Trend Arrows:
Up and down trend indication
Backlight:
Bright orange LED (intensity varies with signal)
Front Panel:
FM Type 4X, IP65; panel gasket provided
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:
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.
Voltage Drop:
2.0 V max w/o backlight, 5.7 V max with backlight
Equivalent Resistance:
125 Ω @ 20 mA without backlight,
315 Ω @ 20 mA with backlight.
Normal Mode Rejection:
64 dB at 50/60 Hz
Operating Temperature Range:
-20 to 65°C
Allowable Temperature Range:
-40 to 65°C* (see note below)
Storage Temperature Range:
-40 to 85°C
Relative Humidity:
0 to 90% non-condensing
Connections:
Screw terminals accept 12 to 22 AWG wire
Enclosure:
1/8 DIN, high impact plastic, UL 94V-0, color: gray
Mounting:
1/8 DIN panel cutout required. Two panel mounting
bracket assemblies provided.
Tightening Torque:
4.5 lb-in (0.5 Nm) Screw terminal connectors
Overall Dimensions:
4.68" x 2.45" x 3.79" (119 x 62 x 96 mm)
Weight:
5.7 oz (162 g)
Warranty:
3 years parts and labor
Extended Warranty:
1 or 2 years, refer to Price List for details
* Below -20°C the LCD becomes less readable. See application note AN-1005.
Input
Input Range:
4-20 mA
Accuracy:
±0.03% of span ±1 count, square root and
programmable exponent: 10-100% FS.
Calibration:
Scale without signal or calibrate with signal source
Calibration Range:
User programmable over entire range of meter
Minimum Span:
0.40 mA between input 1 and input 2
Note:
An Error message will appear if input 1 and input 2 signals are too close together.
Input Overload:
Over current protection to 2 A maximum
Decimal Point:
Up to 4 places
(d.dddd, dd.ddd, ddd.dd, dddd.d, or ddddd)
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
Totalizer Features
Total Display:
0 to 99,999 main total display plus 0 to 999 total
overflow for a combined 8 digit total of 99,999,999.
Alternating Display:
Totalizer may be programmed to alternate
between rate and total every 10 seconds.
Time Base:
Seconds, minutes, hours, or days
Totalizer Conversion Factor:
0.0001 to 99999
Totalizer:
Calculates total based on rate, time base of second,
minute, hour, or day, and field programmable multiplier; stored in
non-volatile memory upon power loss.
Totalizer Rollover:
Total rolls over when total exceeds 99,999,999.
Totalizer Reset:
Manual reset or automatic with time delay, or
disabled for non-resettable total applications.
Open Collector Output
Rating:
Isolated open collector, 30 VDC @ 175 mA max
imum
Alarm Output:
Assign to rate or total, high or low rate alarm.
Deadband:
0-100% FS, user selectable
Acknowledge
: ACK button resets output and screen indication.
Automatic Reset:
Alarm resets automatically when signal reaches
the reset point.
Pulse Output:
250 pulses/sec max; pulse width: 3 ms, fixed. If the
pulse output exceeds 250 pulses/sec, counts are accumulated as
pending and are not lost. One pulse per total increment, programmable
from 0.0001 to 99999 (decimal point based on total selection).
PD689 Approvals for Hazardous Locations
FM Approved & CSA Certified as intrinsically safe with entity for
use in Class I, Div 1, Groups ABCD; Class II, Div 1, Groups EFG;
Class III, Div 1; Class I, Zone 0, Group IIC; T-code = T4.
Non-incendive: Suitable for use in Class I, Div 2, Groups ABCD;
Class II, Div 2, Groups FG; Class III, Div 2.
Entity Parameters:
U
i
: 30 V;
I
i
: 175 mA;
C
i
: 0;
L
i
: 0;
P
i
: 1.0 W
Note:
Installation must be performed in accordance with Control Drawing LIM688-2
ordering inForMation
Model
Description
PD684-0K1
Loop Leader™ PRT
Rate/Totalizer for Safe Area
PD689-0K1
Loop Leader™ PTH
Rate/Totalizer FM & CSA
Enclosures
Model
Meters Description
Mounting
PDA24
XX
1 - 4 *
Plastic NEMA 4X
Inside Cover
PDA26
XX
1 - 6 *
Stainless Steel NEMA 4X
Through Door
PDA27
XX
1 - 6 *
Steel NEMA 4X
Through Door
PDA2801
1
Low-Cost NEMA 4X
Through Cover
Note:
XX
= the last two digits of the model number.
* Go to
www.predig.com
to find individual model numbers
Disclaimer
The Information contained in this document is subject to change without notice. Precision Digital
Corporation makes no representations or warranties with respect to the contents hereof, and
specifically disclaims any implied warranties of merchantability or fitness for a particular purpose.
©2006 Precision Digital Corporation. all rights reserved
