25
Installation, Operations & Maintenance Manual
SECTION 4 - MAINTENANCE
12. Verify: Verify travel with low and high signal.
Readjust feedback zero and feedback span
if needed for travel. Readjust limits until limit
LEDs are just on, if needed.
13. Disconnect input and output control signal
wiring, reconnect all connectors and install
ECC cover.
4.8.1.3 Calibration C
Calibration C is a complete calibration. Performed
after replacing a circuit board with a new board that
was not factory calibrated. For example, A user
may want to move an ECC from a mRoy
®
series
of pumps to a Milroyal
®
B series. This procedure
would be used to now set up the Milroyal
®
B ECC.
It is important for the user to understand that circuit
boards obtained from the manufacturer are preset
for a specific series of pumps. This procedure
can also be used as a diagnostic tool to verify the
integrity of a circuit board. Only qualified personnel
familiar with the complete calibration procedure
should use it as a diagnostic tool.
1. Tools needed for calibration C:
a) Digital volt meter (DVM) or equivalent with
resistance, 5 VDC, and 20 mA.
b) 4 - 2 0 m A ( 1 - 5 V D C ) s o u r c e a n d
115 or 220 VAC source
c) Precision screwdriver to adjust potentiometers
d) Tool kit
2. Preparation:
a) Ensure circuit board has been replaced.
b) Remove AC power.
c) Loosen set screw (530) in base, remove
cover (280) from ECC.
VOLTAGE SELECTOR SWITCH
SW1 LOCATED ON TOP OF THE
CIRCUIT BOARD MUST BE SET TO THE VOLTAGE LISTED ON
YOUR DATA PLATE
(FIGURE 1 OR 2)
, OR DAMAGE TO MOTOR
WILL RESULT.
d) Ensure voltage selector switch is set to
115 VAC or 230VAC as indicated on data
plate (Section 2).
e) Ensure DIP switches SW2 and SW3 are set
as needed for proper operation (Section 2).
f) Remove ECC from pump.
NOTE
Table 13 lists the resistances value of VR8
that is set at the manufacturer on circuit card
30300/39320 when the series (pump) it is being
used on is specified.
PRODUCT
SERIES
Resistance Value -
ohms, adjust VR8 to
get
All Value ECCs
1,450 to 1,550
All mRoy
®
Pumps
1,450 to 1,550
Milroyal
®
B, C, & G
9,800 to 10,800
Milroyal
®
D
8,600 to 8,700
MACROY
®
G
9,800 to 10,800
MAXROY
®
B
9,800 to 10,800
Table 13. Circuit Board 30300 Resistance
Values
NOTE
Values above must be obtained with feedback
potentiometer connector J2 unplugged. Replace
J2 after resistance is set.
g) Disconnect feedback potentiometer
connector J2.
h) Connect a DVM across test pins J6-9 and
J6-10 located on top of PCB
(Figure 11)
.
Adjust range offset (VR8) for the value of
your product, see Table 13 (VR8 may not
need adjusted).
i) Connect feedback potentiometer connector
J2.
