Watlow-electric Micro-Based Autotuning Control SERIES 980/985 Bedienungsanleitung PDF herunterladen (Seite 39)

RTD

Field

Calibration

Procedure

Equipment Required

1K ohm precision decade resistance box with 0.01 ohms resolution.

Setup And Calibration

NOTE

Before

calibration

on an installed control, make sure

all

data and

parameters are documented. See Setup and Operation Charts,

Pages 26 and 28.

Connect the AC line voltage

to Terminal

#4,

to Terminal

#7,

and

Ground to Terminal

#8.

Jumper for correct line voltage. See Chapter 2.

NOTE:

Connect the decade

resistance

box to Terminal

#12,13

and 14 on the

Not all parameters

terminal strip.

Use regular 20

24 gauge wire of the same length and

will appear. They

are dependent on

type.

your unit type. Use

only the steps that

Apply power to the unit and allow it to warm up for

minutes. After

apply to your unit.

warm-up put the unit in the CAL menu. See Figure 33 on Page 37.

Press the MODE key until the

rL0

prompt is displayed.

IMPORTANT:

When the MANUAL LED is ON the unit is

automatlcally

calibrating.

Your

sequence is VERY

important.

Always move to the next prompt before

changing the calibration equipment.

Press the AUTO/MAN key twice to enter the MANUAL mode. The unit is

calibrating when the MANUAL LED is ON.

At the

rL0

prompt, set the decade resistance box to the correct low

setting- See the table below. Allow at least 10 seconds to stabilize.

Press the MODE key.

Calibration

Low

High

985A-2XX0-0X00

1°

17.31

317.33

985A-3XX0-0X00

0.1

59.57

177.13

At the

rHI

prompt, set the decade resistance box to the correct high

setting. Allow at least 10 seconds to stabilize. Press the AUTO/MAN key

twice to exit the MANUAL mode. This pauses calibration to allow you to

exit the CAL mode.

Table

RTD

Settings.

Appendix

WATLOW

Series 980/985 User’s

Manual

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 45 46 47

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