EN
38
WIKA operating instructions, model CTR3000
14191761.01 05/2019 EN/DE
6. Commissioning, operation
The CTR3000 can be used with any thermocouple (calibrated or uncalibrated) fitted with a standard miniature thermocouple
connector. Connect your thermocouple to either of the miniature thermocouple connectors on the front panel.
■
Probe name
A unique name (e.g. certificate number or serial number) must be entered for the new thermometer.
This name is also shown later under the existing probes and for this name a search can be done. The input can be done via
the QWERTZ keyboard.
■
Reference
Please mark the thermometer as reference or not. This is important for the scan mode - see chapter 6.4.6 “Application
[Calibration]” because the difference between the first reference and the test item will be calculated and displayed in the
information bar.
■
Probe type
Is this thermocouple type B, E, J, K, N, R, S or T?
■
Cold junction
Three selections can be done: internal, external, channel
The selected issue turns into orange. If a channel is selected then the numpad opens to define the channel. The number
of the channel is right-aligned showed left to the button
[Channel]
. Below the button
[Channel]
the name of the probe is
displayed.
a.
Internal
Internal reference junction compensation using the internal temperature-compensated copper isothermal junction. This
is the default mode.
■
For direct temperature connection with no external reference junction.
■
High-accuracy measurement, requiring additional connection reference junctions.
b.
External
No reference junction compensation applied to the measurement. All measurements are made with respect to 0 °C.
■
Used with an external ice point reference junction.
■
Suitable for highest precision measurement.
c.
Channel
External reference junction compensation using PRT measurement of reference junction. No measurement channels
are lost as the reference channel PRT uses the corresponding input channel.
For temperature-controlled or ovenised reference junctions.
■
T
min
Probes may have a minimum temperature set for them (positive or negative). When the probe is assigned to a channel, the
probe temperature is checked against the set minimum and a range error (exclamation mark left beside the button
13
)
issued if the minimum temperature is exceed.
■
T
max
Probes may have a maximum temperature set for them (positive or negative). When the probe is measured and active on
a channel, the probe temperature is checked against the set maximum and a range error (exclamation mark left beside the
button
13
) issued if the maximum temperature is exceed.
■
Last cal.
Please enter the last calibration date of the thermometer.
If the system date = last cal date + 1 year then a pop up is coming up which reminds that the probe is due to recalibration.
The recalibration cycle depends mainly on the thermal stress on the thermometer. The calibration time can only
be estimated and is decided on by the user. Therefore check the calibration system at the triple point or freezing
point of water on a regular basis (independent of the recalibration cycle). Recommendation is a calibration once a
year.
