Connect-Tek Transa PRO 17 Bedienerhandbuch PDF herunterladen (Seite 59)

Do not proceed through this section unless there is a defi-

nite need to recalibrate the controller. If you do recalibrate,

all previous calibration data will be lost. Do not attempt recalibra-

tion unless you have the appropriate calibration equipment. If the

calibration data is lost, you will need to return the controller to

your supplier who may charge you a service fee to recalibrate the

controller.

Entering calibration mode will break the control loop. Make

sure that the system is ready to enter calibration mode.

Equipment needed for calibration:

1. A high-accuracy calibrator (Fluke 5520A calibrator

recommended) with the following functions:

0–100mV millivolt source with ±0.005% accuracy

0–10V voltage source with ±0.005% accuracy

0–20mA current source with ±0.005% accuracy

0–300 ohm resistant source with ±0.005% accuracy

2. A test chamber providing 25°C–50°C temperature range

3. A switching network (SW6400, optional for automatic

calibration)

4. A calibration fixture equipped with programming units

(optional for automatic calibration)

5. A PC installed with calibration software, BC-Net, and smart

network adapter SNA10B (optional for automatic calibration)

The calibration procedures described in the following section are

step by step manual procedures.

Since it takes 30 minutes to warm up a unit before calibration,

calibrating the units one by one is quite inefficient. An automatic

calibration system for small quantities as well as one for unlimit-

ed quantities is available upon request.

Manual calibration procedures

• Perform step 1 to enter calibration mode.

Step 1

Set the lockout DIP switch to the unlocked condition (both

switches 3 and 4 are off).

Press both scroll and down keys and release them quickly. The

operation mode menu will appear on the display. Repeat this

operation several times until appears on the dis-

play. Press the scroll key for at least 3 seconds. The display will

show and the unit will enter calibration mode. Output 1

and output 2 use their failure transfer values to control.

• Perform step 2 to calibrate zero for the A to D converter and step

3 to calibrate the gain for the A to D converter. The DIP switch

should be set for T/C input.

Step 2

Short terminals 12 and 13, then press

the scroll key for at least 3 seconds.

The display will blink for a moment

until a new value is obtained. If the

display didn’t blink or if the obtained

value is equal to -360 or 360, then calibration failed.

Step 3

Press the scroll key until the display shows

Send a

60mV signal to terminals 12 and 13 with the correct polarity.

Press the scroll key for at least 3 seconds. The display will blink

for a moment until a new value is obtained. If the display didn’t

blink or if the obtained value is equal to -199.9 or 199.9, then cal-

ibration failed.

• Perform step 4 to calibrate the voltage function (if required) for

input 1.

Step 4

Set the DIP switch for voltage

input. Press the scroll key until the

display shows . Send a

10V signal to terminals 12 and 13

with the correct polarity. Press the

scroll key for at least 3 seconds. The display will blink for a

moment until a new value is obtained. If the display didn’t blink

or if the obtained value is equal to -199.9 or 199.9, then calibra-

tion failed.

• Perform both steps 5 and 6 to calibrate RTD function (if

required) for input 1.

Step 5

Set the DIP switch for RTD input.

Press the scroll key until the display

shows . Send a 100 ohms sig-

nal to terminals 18, 19, and 20 using

to the connection shown below:

Press the scroll key for at

least 3 seconds. The dis-

play will blink for a

moment; if it does not,

calibration failed.

Step 6

Press the scroll key and the display will show

Change

the ohm’s value to 300 ohms. Press the scroll key for at least 3

seconds. The display will blink for a moment while values are

obtained for SR1 and REF1 (last step). If the display didn’t blink

or if any value obtained for SR1 or REF1 is equal to -199.9 or

199.9, then calibration failed.

• Perform step 7 to calibrate mA function (if required) for input 1.

Step 7

Set the DIP switch for mA input.

Press the scroll key until the display

shows . Send a 20mA signal

to terminals 12 and 13 with the cor-

rect polarity. Press the scroll key for

at least 3 seconds. The display will blink for a moment until a new

value is obtained. If the display didn’t blink or if the obtained

value is equal to -199.9 or 199.9, then calibration failed.

• Perform step 8 to calibrate voltage as well as CT function (if

required) for input 2.

Manual calibration procedures, continued next page…

Chapter 6 Calibration

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