Balance Control (factory adjust only)
LO
Calibration
Control
HI
Calibration
Control
Decimal Point
Jumper Array
Ribbon Cable
Connector
R11
LO
R10
BAL
HI
R9
JP1
Calibration
The LO control (R11) is located below the display and the HI control
(R9) is located to the right of the display. Apply a 4 mA signal and
adjust the LO control to display the desired reading. Next, apply a
signal between 16 and 20 mA and adjust the HI control to display
the desired reading. Complete the calibration by making any
minor adjustments to the LO and HI controls.
MOUNTING
PD660
The PD660 can be wall mounted using the mounting holes beneath
the cover screws. It can be panel mounted with the addition of the
PDA6604 panel mount kit. It can also be pipe mounted by using the
PDA6845 or the PDA6845-SS 2" pipe mounting kit.
PD661
The PD661 has no provisions for wall mounting. Installation of
the unit is accomplished by using the two ½" NPT conduit holes
provided with ½" NPT fittings.
DIMENSIONS
PD660
Units: Inches (mm)
Wall
Mounting
Holes
Beneath
Cover
Screws
D
A
C
E
F
B
A: 3.15 (80)
C: 2.36 (60)
E: 2.56 (65)
B: 4.33 (110)
D: 3.54 (90)
F: 0.79 (20)
PD661
A
B
C
A: 4.5 (114)
B: 4.75 (121)
C: 3.75 (95)
SETUP
The only tools needed for calibration are a calibrated current
source, a flat head screwdriver, and a phillips head screwdriver.
Please note that the meter must be disassembled in order to
perform the setup functions.
Disassembly
The calibration controls are located behind the display faceplate.
To access these controls, you must first remove the enclosure
cover and faceplate by doing the following:
PD660: Loosen the four screws on the enclosure cover and remove.
Unscrew the two fasteners that hold the faceplate, then remove.
PD661: Turn the enclosure cover counterclockwise to remove.
Unscrew the two fasteners that hold the faceplate, then remove.
Connections
Field connections are made to the screw terminals located on
the Input Signal Board. To access these screw terminals it is
necessary to remove the Display Board from the Input Signal
Board. First, disconnect the ribbon cable connector from the
Display Board. Next, loosen the two screws located to the left and
right of the LCD that hold the Display Board in place. Finally,
remove the Display Board carefully to avoid contact with any
rough surfaces.
Connect a 4-20 mA input signal to terminal J5 located on the Input
Signal Board as shown below.
Note: When reassembling boards DO NOT over-tighten screws.
CAUTION - DISCONNECT FROM SUPPLY BEFORE OPENING. KEEP COVER TIGHT WHILE CIRCUITS ARE ALIVE.
CONDUIT SEALS MUST BE INSTALLED WITHIN 18" OF THE ENCLOSURE.
ATTENTION - OUVRIR LE CIRCUIT AVANT D’ENLEVEL LE COUVERCLE GARDER LE COUVERCLE BIEN FERME TANT QUE
LES CIRCUITS SONT SOUS TENSION. UN SCELLEMENT DOIT ETRE INSTALLE A MOINS DE 450 mm DU BOITIER.
Decimal Point Selection
Decimal point selection is accomplished using JP1 located behind
the faceplate to the right of the display. Leave jumper on one pin
only for a display of 1999 (default), place the jumper over both
bottom pins for a display of 199.9, middle for 19.99, top for 1.999
Ribbon
Cable
Connector
Display Board
Input Signal Board
Pollution Degree 2
Installation Category II
Screw
Terminal
Connector J5
+
+
+
-
-
-
Loop Power
Supply
Signal Input Connections
S
S
4-20 mA
Transmitter
J5 Screw Terminal Connector
Wiring Diagram
LIM660-661_E 11/05
www.predig.com
PRECISION DIGITAL CORPORATION
19 Strathmore Road • Natick MA • 01760 • USA • Tel: (800) 343-1001 • Fax: (508) 655-8990
LOW COST 3½ DIGIT LOOP-POWERED METERS
