22
WARNING
USE EX TREME CAUTION. FULL LINE
VOLTAGES ARE PRESENT ON ARE AS
OF THE CIRCUIT BOARD.
6. Disconnect J5 (Figure 4 an d co nnect a 4-20
mA current source (or 1-5 VDC) to input signal
(high and low) connection at four-position con-
nector located under PCB.
WARNING
USE EX TREME CAUTION. FULL LINE
VOLTAGES ARE PRESENT ON ARE AS
OF THE CIRCUIT BOARD.
7. Apply AC power to ECC.
8. Apply a 4 mA (1 VDC) control signal and allow
motor to run until it stops. Disconnect power.
9. Manually turn
pump
stroke adjust to a position
of 0% for direct-acting or 100% for reverse-act-
ing.
10. Install ECC to pump. Do not rotate ECC shaft.
If necessary, slightly rotate pump coupling for
proper engagement with ECC drive pin. Install
and tighten mounting bolts.
11. Using a screwdriver, rotate motor shaft to turn
pump stroke adjust to minus 1% (this is 1 p er-
cent below 0% reading, shows as “9” on most
pump micrometer rings). (Max Roy pump has
mechanical stops).
12.
Low signa l adjus t:
Discon nect mo tor le ad,
J1. Ap ply a 4 mA (1 VDC) signa l an d a djust
zero pot (VR2)
until bo th motion lights are off
(CR5 and CR6). Adjust
lower limit LED (CR3)
until just on using (V R3), if ne eded. Adju st
feedback zero pot (VR5)
to 4 mA (1 VDC), if
needed.
NOTE
The MaxRoy B, Milr oyal B, C, G , MacRoy
G, and D uses a 20 :1 gearbox. It re quires
200 turns at the a ctuator ha ndwheel to
adjust the pump str oke 10 tu rns (0 % to
100%). The Milroyal D uses a 5:1 or 12 :1.
13. Manually turn pump stroke adjust to a position
of 100% (101%) for direct-acting or 0% (-1%)
for re verse-acting. ( The Max Roy pu mp h as
mechanical stops.)
14.
High signal adjust:
Apply 20 mA (5 VDC) sig-
nal an d ad just
span p ot ( VR1)
until bo th
motion light s are of f. Adjust upper limit LED
(CR4) until jus t on (VR4), if needed. Adjust
feedback span pot (VR6)
to 20 mA (5 VDC), if
needed.
15. Verify: Verify tra vel with lo w a nd h igh sign al.
Readjust feedback zero and feedback span if
needed for travel. Readjust limit s until limit
LEDs are just on, if needed.
16. Disconnect input and output control signal wir-
ing, reconnect all co nnectors, and install ECC
cover.
4.8.1.2 Calibration B
Calibration B is performed to synchronize the ECC
with the pump.
•
Calibration B is performed after replacing
the circuit board with a new board that has
been factory calibrated.
1. Tools needed for calibration B:
a) Digital volt meter (DVM) or equivalent with
resistance, 5 VDC, and 20 mA.
b) 4-20 mA (1-5 VDC) source and 115 or 220
VAC source
c) Precision screwdriver to ad just potentiom-
eters
d) Tool kit
2. Preparation:
a) Ensure new circuit board is replaced.
a) Remove AC power.
b) Remove cover from ECC.
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