EN
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WIKA operating instructions, model CTR3000
14191761.01 05/2019 EN/DE
6.4.1.4 Unit selection
By pressing button
10
the menu for the unit selection opens on the right side. Back via the menu button on the bottom line.
1. Press button
10
.
⇒
The menu for the unit selection opens on the right side.
2. Select the unit.
⇒
The desired unit will be indicated in the button
10
.
3. Return to the main screen by pressing the menu button
24
.
Sequence as shown right for all PRT channels.
Sequence for all PRT channels like °C, °F, K and Ω.
Beside the button
[Freeze]
on the left side the corresponding value is displayed, e.g.:
■
Pt100 and °C → then show Ω
■
TC and mV → then show °C
Calculation and units
1 °Celsius
x °C * 1,8 + 32 = y °Fahrenheit
x °C + 273,15 = y Kelvin
Temperature units
The temperature cannot be measured. The instrument measures Ω or mV.
These electrical signals are calculated into temperature through the conversion of the probe by means of a characteristic
function.
6.4.1.5
√2 current multiplier
This option increases current through the probes by √2 (double-power), to determine any probe self-heating. The best method
of using this option is first to let the sensor reach a steady temperature and note the value. It may take some time to stabilize.
1. Press button
[√2]
.
⇒
Immediately the increased current through the probe will increase the heating effect on the probe.
⇒
The displayed value will represent the temperature change due to the increased current.
2. When the measured value has stabilized, note the temperature change.
The result is the actual temperature with the effect of probe self-heating eliminated.
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6. Commissioning, operation
