24
Installation, Operations & Maintenance Manual
SECTION 4 - MAINTENANCE
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 - 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 new circuit board is replaced.
b) Remove AC power.
c) Remove cover from ECC.
VOLTAGE SELECTOR SWITCH
SW1 LOCATED ON TOP OF THE
CIRCUIT BOARD MUST BE SET TO THE VOLTAGE LISTED ON
YOUR DATA PLATE
(FIGURES 1 OR 2)
, OR DAMAGE TO MOTOR
WILL RESULT.
d) Ensure voltage selector switch is set to
15 VAC or 230 VAC as indicated on data
plate (Section 2).
e) If new circuit board has been replaced ensure
DIP switches SW2 and SW3 are set as
needed for proper operation (Section 2).
f) Remove ECC from pump.
USE EXTREME CAUTION. FULL
LINE VOLTAGES ARE PRESENT
ON AREAS OF THE CIRCUIT BOARD.
3. Disconnect J5
(Figure 4)
and connect a
4-20 mA current source (or 1-5 VDC) to input
signal (high and low) connection at four position
connector located under PCB.
USE EXTREME CAUTION. FULL
LINE VOLTAGES ARE PRESENT
ON AREAS OF THE CIRCUIT BOARD.
4. Apply AC power to ECC.
5. Apply a 4 mA (1 VDC) control signal and allow
motor to run until it stops. Disconnect power.
6. Manually turn pump stroke adjust to a
position of 0% for direct-acting or 100% for
reverse-acting.
7. 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.
8. Using a screwdriver, rotate motor shaft to turn
pump stroke adjust to minus 1% (this is 1
percent below 0% reading, shows as “9” on most
pump micrometer rings). (MAXROY
®
pump has
mechanical stops).
9. Low signal adjust: Disconnect motor lead,
J1. Apply a 4 mA (1 VDC) signal and adjust
zero pot (VR2) until both motion lights are off
(CR5 and CR6). Adjust lower limit LED (CR3)
until just on (VR3), if needed. Adjust feedback
zero pot (VR5) to 4 mA (1 VDC), if needed.
NOTE
The MAXROY
®
B, Milroyal
®
B, C, G,
MACROY
®
G, and D uses a 20:1 gearbox.
It requires 200 turns at the actuator handwheel
to adjust the pump stroke 10 turns (0% to 100%).
The Milroyal
®
D uses a 5:1 or 12 :1.
10. Manually turn pump stroke adjust to a position
of 100% (101%) for direct-acting or 0% (-1%)
for reverse-acting. (The MAXROY
®
pump has
mechanical stops).
11. High signal adjust: Apply 20 mA (5 VDC) signal
and adjust span pot (VR1) until both motion
lights are off. Adjust upper limit LED (CR4) until
just on (VR4), if needed. Adjust feedback span
pot (VR6) to 20 mA (5 VDC), if needed.
