OTT PLS 500, Operating Instructions Manual

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3
Table of contents
1 Scope of supply 4
2 Order numbers and variant code 4
3 Basic safety information 5
3.1 Markings and symbols used in the instruction 5
3.2 Explanation of safety information used 5
3.3 Note the following for safe and trouble-free operation 6
4 Introduction 7
5 Installing the pressure probe 9
5.1 Installation type A: fixing the pressure probe into a protective device 10
5.2 Installation type B: hanging the pressure probe 11
5.3 Connecting humidity absorbing system 12
5.4 Wire assignment of the pressure probe cable 12
5.5 Connecting the OTT PLS 500 to any data logger using an SDI-12 interface 13
5.6 Connecting the OTT PLS 500 to any data logger/electronic control system
using an RS-485 interface 13
5.7 Connecting the OTT PLS to the IP data logger OTT netDL using an SDI-12
or RS-485 interface 14
5.8 Connecting the OTT PLS 500 to the Sutron XLink 100/500 data logger
using an SDI-12 or RS-485 interface 15
5.9 Connecting the OTT PLS to the Sutron SatLink 3 data logger using the
SDI-12 or RS-485 interface 16
6 Configuring/testing the OTT PLS 500 17
7 SDI-12 Commands and Responses 19
7.1 Overview of SDI-12 commands 19
7.2 Standard commands 23
7.3 Meta data commands 30
7.4 Advanced SDI-12 commands 32
8 RS-485 Interface with Modbus protocol (RTU) 39
8.1 Preconditions 39
8.2 Value ranges 39
8.3 Function "Read Holding Registers" – Sensor description 40
8.4 Function "Read Holding Registers" – Sensor values 43
8.5 Configuration register 44
9 Carrying out maintenance work 46
10 Troubleshooting 48
11 Repair 49
12 Notes about the disposal of old units 49
13 Technical data 50
Annex A – Shorten pressure probe cable 52
Annex B – Note on Declaration of Conformity 54