Wika CTH6300 User Manual download pdf (Page 28)

28 WIKA operating instructions, models CTH6300 and CTH6500

2079988.04 07/2014 GB/D

6. Commissioning, operation

6.4.4.1 Calibration function combined probe (humidity/temperature) CAL

All humidity probes by WIKA are combined probes.

This means that besides the humidity sensor they also contain a temperature sensor.

Both measurement parameters are connected to the same measuring channel using

the same probe connector. To calibrate both measurement parameters humidity and

temperature, the measurement parameter rH must be set rst (rel. humidity) (see

chapter 6.4.2 “Probe selection Prob”).

The instrument has 3 dierent calibration modes:

OFF Standard characteristic curve

no probe-specic correction is performed

oP1 Calibration by code

The 2 x 4-digit code is displayed clearly visible on the handles of our probes,

rH = humidity and P °C = temperature) corresponds to a 2-point calibration.

oP2 Physical calibration

Physical calibration

Calibration with test variables: 1-point, 2-point or 3-point calibration possible -

is only possibly for the measurement parameter rH humidity.

CAL = calibrate

Press the ENTER/MENU key and select CAL using the arrow keys ▲▼. Then press

ENTER/MENU again. A small 1 appears on the left side of the display, it indicates the

channel. Use the arrow keys ▲▼ to select the channel (1 or 2) to be calibrated. Conrm

selection by pressing ENTER/MENU.

Example of the measured value display after physical calibration against a test

variable:

The small 2 in the left corner in connection with the display segment CAL in the center

of the display indicates that the physical probe calibration oP2 has been activated.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 79 80

No comments

Wika CTH6300 User Manual Page 28