Kipp & Zonen CT24 User manual
0305 260
SIGNAL AMPLIFIER 4 - 20 mA
INSTRUCTION MANUAL
IMPORTANT USER INFORMATION
1
IMPORTANT USER INFORMATION
Reading this entire manual is recommended for full
understanding of the use of this product
Should you have any comments on the product or this manual we
will be pleased to receive them at:
Kipp & Zonen B.V.
Röntgenweg 1 2624 BD Delft Holland
P.O. Box 507 2600 AM Delft Holland
Phone +31 (0)15 2698000
Fax +31 (0)15 2620351
Kipp & Zonen reserve the right to make changes in the
specifications without prior notice.
WARRANTY AND LAIBILITY
Kipp & Zonen guarantees that the product delivered has
been thoroughly tested to ensure that it meets its
published specifications. The warranty included in the
conditions of delivery is valid only if the product has been
installed and used according to the instructions supplied
by Kipp & Zonen.
Kipp & Zonen shall in no event be liable for incidental or
consequential damages, including without limitation, lost
profits, loss of income, loss of use and other related
exposures, however caused, arising from the faulty and
incorrect use of the product.
IMPORTANT USER INFORMATION
2
COPYRIGHT©2004 KIPP & ZONEN
All rights reserved. No part of this publication may be
reproduced, stored in a retrieval system or transmitted in
any form or by any means, without permission in written
form from the company.
Manual version: 0604
IMPORTANT USER INFORMATION
3
Declaration of Conformity
According to EC guideline 89/336/EEC 73/23/EEC
We Kipp & Zonen B.V.
Röntgenweg 1
2624 BD Delft
Declare under our sole responsibility that the product
Type: CT 24
Name: Solar Sensor Amplifier 4 – 20 mA
To which this declaration relates is in conformity with the
following standards:
Imissions EN 50082-1 Group standard
IEC 1000-4-2
IEC 1000-4-3
IEC 1000-4-4
Emissions EN 50081-1 Group standard
EN 55022
Safety standard IEC 1010-1
Following the provisions of the directive
B.A.H. Dieterink
President
KIPP & ZONEN B.V.
IMPORTANT USER INFORMATION
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TABLE OF CONTENTS
5
TABLE OF CONTENTS
IMPORTANT USER INFORMATION...............................1
Declaration of Conformity .............................................3
TABLE OF CONTENTS...................................................5
1.
GENERAL INFORMATION ...................................7
2.
SPECIFICATIONS .................................................9
3.
CONNECTION OF THE CT 24 ............................11
3.1
Minimising interference ........................................13
3.2
Selecting the supply voltage ................................14
3.3
Connection for current output...............................15
3.4
Connection for voltage output ..............................17
4.
NEGATIVE INPUT SIGNALS ..............................21
5.
CALIBRATION PROCEDURE ............................23
5.1
Standard calibration .............................................23
5.2
Special calibration. ...............................................25
6.
PART NUMBERS ................................................27
TABLE OF CONTENTS
6
GENERAL INFORMATION
7
1. GENERAL INFORMATION
With the CT 24 it is possible to convert a low level voltage
output from a solar sensor to the standard level of 4 – 20
mA or (using the installed 500 Ohm resistor) to a 2 – 10
Volt signal.
The CT 24 amplifier is designed to use with Kipp & Zonen
solar sensors, to allow long cables between sensor and
data logger without external interference.
The large operation temperature range from - 30°C to +
70°C and the waterproof housing (IP 65) makes that the
CT 24 can be used under the same conditions as all solar
sensors.
The amplification can be adjusted from the standard 0 –
20 mV is 4 – 20 mA to a value that takes the calibration
factor of the sensor into account, like 0 – 1600 W/m² is 4
– 20 mA.
Even negative inputs are allowed through a positive shift
of the zero point from +4 to + 8 mA. This allows for
negative input signals of about 250 W/m² like a
pyrgeometer and net radiometer produces.
The CT 24 is protected against reversed polarity, voltage
surges on input and output lines and is shielded against
EMF disturbance.
For pyranometers with temperature sensors there are
special connector strips in the CT 24 to connect these
sensors from in going to out-going cable.
GENERAL INFORMATION
8
SPECIFICATIONS
9
2. SPECIFICATIONS
Current output range nominal 4 to 20 mA
Voltage output range @ R
L
= 500 Ω2 to 10 V
Gain, factory set 1 mA / mV +/- 0.1%
Gain adjust +0.5 to +1.0 mA / mV
Zero, factory set +4 mA +/- 0.1%
Zero adjust +3 to +8 mA
Non-linearity < 0.1%
Temperature dependence of gain within +/- 0.01% / K
Zero drift typical +/- 0.4 µV / K
Input impedance 1 MΩ
Input range @ gain 0.5, zero 4 mA 0 to +32 mV
@ gain 0.5, zero 8 mA -8 to +24 mV
@ gain 1, zero 4 mA 0 to +16 mV
@ gain 1, zero 8 mA -4 to +12 mV
Power supply @ R
L
≤100 Ωmin. 12 to 30 VDC
Power supply for voltage output 10V min. 20 VDC
Temperature range (operating) -30°C to +70°C
Housing Aluminium, grey lacquered
Dimensions W x D x H 64 x 58 x 34 mm
Water proof IP 65 / DIN 40050
Cable glands size 4 to 6,5 mm
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