Press tpc module into tpo connector as shown – Myron L Aquaswitch II User Manual
Page 31
3. RECALIBRATION
Electronic Calibration Only. For System Calibration, see below.
The Temperature Module was calibrated at the factory, however,
if you wish to check the calibration the following procedure will
help you to accomplish this task. Exercise caution while
performing this procedure.
Requirements:
TP Calibration Module (TPC) or
Two .1% precision resistors -
ZERO - 1000.0
Ω
(0°C = 0.0V)
SPAN - 1758.56
Ω
(200°C = 5.0V)
One (1) jumper
A DVM set to DC Volts, a tweaker or small standard slot
screwdriver.
a. TPC “Calibration” Module Procedure
This procedure assumes the front panel is removed.
1.
Ensure power is OFF.
2.
Remove the sensor leads from the Temperature Module.
3.
Remove the 0-5VDC leads from the Temperature Module.
4.
Press TP Calibration Module (TPC) firmly into sensor
input connectors as shown in figure III.C.5.
5.
Attach the DVM to the 0-5VDC output on the TPC
module. See figure III.C.5.
6.
Turn power ON. The DVM should indicate 0 . 0 volts.
7.
If not, adjust the calibration control marked “ZERO” (see
figure III.C.1 for location) until the DVM indicates 0 . 0
volts as shown in figure III.C.5.
8.
Press switch on the TPC. See figure III.C.6.
9.
The DVM should indicate 5 . 0 volts. See figure III.C.6.
10. If not, while pressing the TPC Module switch, adjust the
calibration control marked “FS” (see figure III.C.1 for
location) until the DVM indicates 5 . 0 volts as shown in
figure III.C.6.
11. Press the front panel TEMPERATURE select switch and
the TPC Module switch, the display should indicate
1 9 9 . 9 as shown in figure III.C.7.
12. If not adjust the calibration control marked “D I S ” (see
figure III.C.1 for location) until the reading is 1 9 9 . 9 as
shown in figure III.C.7.
13. Calibration is complete.
14. Turn power OFF.
15. Remove TPC Module by pressing on each Phoenix
connector release lever*.
16. Reconnect sensor leads as labeled.
17. Reconnect 0-5 VDC output leads as labeled.
18. Continue or reinstall the front panel and tightly secure
both retaining screws, see REASSEMBLY below.
*CAUTION: The sensor input and 0-10 VDC output connectors
require only a small screwdriver or a pen to push on the release
levers. The release levers may be broken or damaged if not
pushed straight toward the CB. DO NOT push the release levers
sideways.
b. Precision Resistor Calibration Procedure
This procedure assumes the front panel is removed.
1.
Ensure power is OFF.
2.
Remove the sensor leads from the Temperature Module.
3.
Install ZERO resistor (1000.0
Ω
) across sensor terminals
BL and OR. See figure III.C.8.
4.
Install JUMPER between BR & BL as shown in figures
III.C.8 & III.C.9.
5.
Attach the DVM to the 0-5 VDC output. See figures
III.C.8 & III.C.9.
6.
Turn power ON. The DVM should indicate 0 . 0 volts.
28
Figure III.C.6
Press TPC Module into
TPO connector as shown.
Press TPC Module into
TPO connector as shown.
Connect DVM leads as shown.
DV
-
+
5.0
BR BL OR - +
0-5VDC +
OUTPUT -
ORANGE
BLUE
BROWN
Figure III.C.7
199.9
FRONT PANEL DISPLAY
Figure III.C.5
DV
-
+
0.0
Press TPC Module into
TPO connector as shown.
Press TPC Module into
TPO connector as shown.
Connect DVM leads as shown.
BR BL OR - +
MYRON L
COMPANY
0-5VDC +
OUTPUT -
ORANGE
BLUE
BROWN
TPC Module
PRESS BUTTON FOR
199.9ºC/5.0VDC
MYRON L
COMPANY
TPC Module
PRESS BUTTON FOR
199.9ºC/5.0VDC