Loop Leader PD688 is an Intrinsically Safe and Nonincendive,
loop-powered, 1/8 DIN digital panel meter designed for hazardous
process control applications. The fact that this meter is loop-powered
means that there is no need to run additional, costly power
lines into a hazardous area; the meter gets all of the power
it needs from the 4-20 mA loop. The PD688 loop-powered indicator
is built in a shallow-depth case with an FM Type 4X front and
features loop-powered backlighting and a wide -30 to 65°C
operating temperature range. It doesn't matter if it's indoors
or outdoors, in bright sunlight or a dimly lit plant, or in
an area that is wet, dirty, hot, or cold, the Loop Leader can
go just about anywhere. The PD688 can be installed in just about
any hazardous area environment under the FM, CSA, and ATEX standards.
Overall Dimensions: 2.45" x 4.68" x 4.19" (62 x 119 x 106 mm)
Weight: 5.7 oz (162 g)
Warranty: 3 years parts & labor
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 max.
HART Transparency: Analog input will not interfere with existing HART communications on the wired 4-20 mA signal
Decimal Point: Up to four decimal 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
*Below -30°C the LCD becomes less readable.
PD688 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: Ui: 30 V; Ii: 175 mA; Ci: 0; Li: 0; Pi: 1.0 W
ATEX II 1G, Ex ia IIC T4, IP65, Ta = -40°C to 65°C
Note: Installation must be performed in accordance with Control Drawing LIM688-2
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.
METEX CORPORATION LIMITED
Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.
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