RH PT12, Manual

Page: 2 / 48

Introduction
PT12 Manual 7/20/2021
Page 2 of 48
TABLE OF CONTENTS
Introduction ........................................................................................................................................................... 5
Quick Start / Initial Setup ....................................................................................................................................... 6
2.1 Connecting a Temperature Probe ................................................................................................................. 6
Starting Up the PT12 .............................................................................................................................................. 7
3.1 Obtaining a Reading ....................................................................................................................................... 7
3.2 Plotting Temperature .................................................................................................................................... 9
Operation ............................................................................................................................................................. 10
4.1 Connecting Temperature Probes ................................................................................................................. 10
4.1.1 Basic Probes ......................................................................................................................................... 11
4.1.2 Smart Probes ....................................................................................................................................... 12
4.1.3 User ‐ Supplied Probes .......................................................................................................................... 12
4.2 Channel Measurement Rate ........................................................................................................................ 13
4.3 Navigating the User Interface ...................................................................................................................... 13
4.3.1 Temperature Graph Display Mode ...................................................................................................... 14
Scrolling the Graph .......................................................................................................................... 15
Zooming the Graph .......................................................................................................................... 16
Axis Control ...................................................................................................................................... 16
Graph Statistics ................................................................................................................................ 17
4.3.2 Resistance Graph ................................................................................................................................. 18
4.3.3 All Temperature Display Mode ............................................................................................................ 18
4.3.4 All Resistance Display Mode ................................................................................................................ 19
4.3.5 Numeric 4x Display Mode .................................................................................................................... 19
4.3.6 Numeric 2x Display mode .................................................................................................................... 20
4.3.7 Combo Display Mode ........................................................................................................................... 21
4.3.8 Probe Status Display Mode .................................................................................................................. 22
4.3.9 Changing Displayed Units of Measurement ........................................................................................ 23
4.3.10 Changing Number Format ................................................................................................................... 23
4.4 Configuring the Probes ................................................................................................................................ 24
4.4.1 Averaging ............................................................................................................................................. 25
4.4.2 Current Mode ...................................................................................................................................... 26
4.4.3 Coefficient Mode ................................................................................................................................. 27
Callendar ‐ Van Dusen (CVD) ............................................................................................................. 27
ITS90 ................................................................................................................................................ 28
4.4.4 Probe Configuration Management ...................................................................................................... 32
4.5 File Manager ................................................................................................................................................ 34
4.5.1 Copying Log Files to USB Drive ............................................................................................................ 34
4.5.2 Deleting Log Files ................................................................................................................................. 34
4.5.3 Set Preferred Logging Location ............................................................................................................ 35
4.6 System Info .................................................................................................................................................. 36
Serial Communications ........................................................................................................................................ 37
5.1 Serial Connections ....................................................................................................................................... 37
5.1.1 Electrical Wiring to the RS ‐ 232 Ports ................................................................................................... 37
RS232 Pin Out .................................................................................................................................. 37
Serial Configuration ......................................................................................................................... 38
5.1.2 USB to Serial Port ................................................................................................................................. 38
5.2 Protocol ....................................................................................................................................................... 39
5.2.1 Communication Sequence and Termination Characters ..................................................................... 39
5.2.2 Case Sensitivity .................................................................................................................................... 39
5.2.3 Numeric Values .................................................................................................................................... 39
5.3 Command List .............................................................................................................................................. 40
5.3.1 System Level Commands ..................................................................................................................... 40
5.3.2 Channel Commands ............................................................................................................................. 41