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Kalibrationsanweisung

Instructions for Humidity Calibration
with Salt Solutions
of Series EE16 Transmitters
1. General
1.1. Purpose:
These instructions describe the procedure for the humidity calibration of the Series EE16 transmitters. Please note that the manufacturer originally calibrated the electronics and sensor element. Humidity calibration is only useful for the EE16 if the humidity deviation at 20 °C is more than ±3%RH. 1.2. Limit of Usage:
The information provided is intended for skilled personnel only. Because of ongoing product development the manufacturer reserves the right to make changes in specification as deemed necessary. Please request the most recent instruction information from the manufacturer. 1.3. Safety:
Please note that only skilled personnel should carry out these instructions and at all times abide by the valid safety procedures and instructions. 1.4. Additional Documents:
• Product
Copying (also in part) only with written permission of E+E Elektronik Ges.m.b.H.!
Art.no. 302138
2. Description
2.1 Required Equipment
• Humidity Calibration Jar part no: HA 01 04 01 or HA 01 04 02
No. HA 01 04 10 10 %RH
No. HA 01 04 35 35 %RH
No. HA 01 04 50 50 %RH
No. HA 01 04 80 80 %RH
No. HA 01 04 95 95 %RH
• Power supply in accordance with transmitter specifications • Output load in accordance with transmitter specifications 2.2 Setup for Calibration
1) The electrical connections to the transmitter have to be in accordance with one of the following
a) Connection of the readout device b) Connection of the power supply 2) Insert the sensor probe in the humidity calibration jar and seal tightly
3) Stabilisation time: minimum 60 min
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Art.no. 302138
Attention: During the entire stabilisation time the transmitter must be connected to the
power supply and readout device.
Note: To reach temperature equilibrium it is recommended to store the transmitter and
the humidity calibration jar in the same room for a minimum of 4 hours.
Note: During the stabilisation time make sure to maintain a constant temperature in the
room. Avoid direct sunlight, other heat sources and drafts.
Note: Before calibration a dirty filter cap should be replaced.
Note: While using the humidity calibration jar and the non-saturated lithium chloride
solutions observe the following procedure:
Put the textile packet (comprising three layers) in the dry and clean cover of the humidity
calibration jar. Shake the lithium chloride ampoule, and crack the tip, saturating the centre
of the textile packet with the entire contents of the ampoule. Insert the humidity sensor
probe into the hole on top and close tightly. The sensor probe is now in an environment
with a defined humidity.
2.3 Calibration:
For simple and quick calibration a ONE-POINT CALIBRATION is recommened at a defined humidity
reference point (value should be close to the working range of the transmitter).
A calibration should be done for every adjustment because an adjustment is only effective at a deviation
larger than 3 % RH.
2.3.1.1 One-Point
Adjustment:
1) Adjustment over the whole working range:
To achieve a reliable accuracy over the whole working range, it is advisable to perform a one-point calibration at 50 %RH. Adjust the output value of the transmitter according to the attached table TAB1 with the potentiometer P3 or P2 (see appropriate PCB-drawing under paragraph 3.)
2) Adjustment at a certain humidity point:

If high accuracy is required at a certain humidity value, it is necessary to adjust at this value or as close as possible. Adjust the output value of the transmitter according to the attached table TAB1 and to the corresponding humidity reference with the potentiometer P3 or P2 (see appropriate PCB-drawing under paragraph 3.) As a result of the one-point-calibration at a specific humidity value, a small increase of the inaccuracy at all other humidity values is to be expected. Please note: In case the humidity value is outside the range of the potentiometer, the transmitter should be returned to the manufacturer for calibration. Copying (also in part) only with written permission of E+E Elektronik Ges.m.b.H.!
Art.no. 302138
Calibration table

TAB 1: output values for ONE-POINT CALIBRATION:
temperature
humidity reference% RH
humidity reference% RH
humidity reference% RH
humidity reference% RH
example: reference humidity: 10 % RH
ambient temperature: 20°C
effective humidity: 9,8 %RH
corresponds for EE16-F*6* with and output value of 5,568mA
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Art.no. 302138
3. PCB-drawing
Depending on the transmitter model of the series EE16 the following potentiometer positions are valid. EE16 FT3- voltage output
EE16FT6 – current output 4-20mA
EE16 FP3- voltage output
EE16FP6 – current output 4-20mA
Copying (also in part) only with written permission of E+E Elektronik Ges.m.b.H.!
Art.no. 302138
Temperature dependance of
humidity standards
humidity standard
temperature 5% RH
10% RH 20% RH 35% RH 50% RH 65% RH 80% RH 95% RH
ATTENTION: * calibration below 0 °C is not possible, because the 95 %RH standard will freeze up.
Copying (also in part) only with written permission of E+E Elektronik Ges.m.b.H.!
Art.no. 302138

Source: http://www.otomasyon.cc/urun_dosya/1234035359.pdf

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