Ariens Path-Pro 136E User Manual download pdf (Page 62)

J, K,

T Thermocouple Field Calibration Procedure

Equipment Required

T/C calibrator set at

0°C/32°F

Type

“J”,

“K”,

“T”

Reference Compensator with reference junction at

0°C/32°F.

Type

“J”,

“K”,

“T”

T/C extension wire.

4-1/2

digit Digital Voltmeter (DVM).

Setup and Calibration

NOTE:

Before calibration on an installed control, make sure all data and

parameters are documented.

Connect the input side of the thermocouple reference compensator, or output

of the T/C calibrator to

Positive and

Negative on the Series 920 terminal

strip. Short the output side of the compensator and turn on the compensator.

Figure 36

Type J, K, or T

Reference Compen-

sator-to-Series 920

Connection

See Figure 36.

Omega Model

MCJ-J

Series 920

Terminal

Strip

I I

Diagram.

(-)

Copper Wires

Open

Test

(

)

(-)

T/C Wires

Connect AC line voltage,

#17,

L2 to

#20,

ground to

#21.

Set DIP switch

to ON. Apply power to the unit and

allow

it to warm up

for 15 minutes. The unit should be in the TEST mode.

Using the MODE key, advance until the IN

parameter appears on the

alphanumeric display. Using the UP/DOWN keys, advance to the thermo-

couple input type. Press the ENTER key.

Connect DVM common to TP84 and DVM positive to TP36 on the

AOO7-

1703 circuit board, (right most board) located on the top side behind the

center chassis support. DVM should be set up for DC volts, and in a range

capable of displaying 32.00

0mV.

Press the MODE key until HOF

XX.XX

appears on the alphanumeric display.

(The decimal will not appear on the display of your control.) Use the UP/

DOWN keys to adjust the alphanumeric display to match the reading on the

DVM. Once the two readings match, press ENTER.

Press the MODE key until parameter CJO

XXXX

appears. Press ENTER. The

unit is now calibrated for Type J, K, and T

themocouple

inputs. Allow 10

seconds for the unit to stabilize. The process reading on the ACTUAL display

should be

32°F

(0°C).

Remove power from the Series 920. Remove thermocouple wires from

and

#8.

Turn off the compensator. Set

DIP

Switch

to the OFF position.

WATLOW Series 920 User’s Manual

Appendix

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 79 80

Comments to this Manuals

No comments

Ariens Path-Pro 136E User Manual Page 62

Comments to this Manuals

Related products and manuals for Garden tools Ariens Path-Pro 136E