Calibration Logbook - JUMO digiLine CR Operating Manual

Intelligent electronics with rs485 interface for connecting conductive conductivity sensors to jumo digiline systems

Hide thumbs

Table Of Contents

Table of Contents

The current measured values for conductivity are shown on the display. The measured temperature

value is only shown if the temperature input is activated. If the temperature input is not activated, you

must measure the temperature of the sample during the calibration with the aid of a separate, appro-

priate temperature measuring device.

Bring the temperature of your sample in succession to the values of the operation temp. and refer-

ence temp. The order does not matter. When each of the temperatures is reached, press the "OK"

operating key to trigger value acquisition.

5. The device displays the temperature coefficient determined. The temperature coefficient is accepted

if you press the "OK" operating key or discarded if you press the "Back" operating key. This com-

pletes the calibration.

Calibrating the temperature coefficient curve (TC-curve)

NOTE!

To calibrate the TC-curve, a temperature measurement must be available at the device (integrated tem-

perature sensor or temperature from a master via an interface). Without acquisition of the temperature

of the process medium sample, the TC-curve cannot be calibrated.

 chapter 12.3.1 "CR input (resistivity conductivity)", page 59

Procedure for calibrating the temperature coefficient curve (TC-curve)

1. Start calibration of the temperature coefficient curve:

Device menu > Calibrate > Calibration of TC-curve

2. Use the "Up" and "Down" operating keys to select the measuring range to calibrate from measuring

ranges 1 to 4 and confirm by pressing the "OK" operating key.

3. Use the "Up" and "Down" operating keys to change the displayed starting temperature and confirm

entry of the value by pressing the "OK" operating key.

Keep in mind that the starting and end temperature must differ by at least 20 °C.

4. Use the "Up" and "Down" operating keys to change the displayed end temperature and confirm entry

of the value by pressing the "OK" operating key.

Keep in mind that the starting and end temperature must differ by at least 20 °C.

5. The device now displays in succession the calibration points of all 7 temperature values from the

starting to the end temperature. Each of the temperature values to be approached and the currently

measured conductivity value are displayed. Bring the temperature of your process medium sample

to the each temperature displayed. When each of the temperature values is reached, automatic val-

ue acquisition takes place for the requested temperature.

6. After successful value acquisition at all 7 calibration points, a summary of the temperature coeffi-

cients determined for the individual temperature intervals is displayed. The temperature coefficients

are accepted if you press the "OK" operating key, or discarded if you press the "Back" operating key.

This completes the calibration.

9.6