Description; Introduction; Standard Specification - LEYBOLD MODEL 1901 Gebrauchsanleitung

Contents
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.2 Standard Specification . . . . . . . . . . . . . . . . . . 14
1.3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . 15
1.4 Order data . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.1 Input/Output Connections . . . . . . . . . . . . . . . 19
2.2 Operating Procedures . . . . . . . . . . . . . . . . . . 19
2.2.1 Accessing the Diagnostic Subroutine
2.2.2 Accessing Set Point Mode . . . . . . . . . . . . . . . 20
2.3 RS-232 OPERATION . . . . . . . . . . . . . . . . . . 21
2.3.1 Temperature Data . . . . . . . . . . . . . . . . . . . . . 21
2.3.2 Setpoint Data . . . . . . . . . . . . . . . . . . . . . . . . 21
3 Attaching Si Diodes to Leybold Cold Heads . . 22
3.1 Accessories Needed . . . . . . . . . . . . . . . . . . . 22
3.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
EC Conformance Declaration . . . . . . . . . . . . . 24
Die deutsche Gebrauchsanleitung beginnt auf Seite 2
14
1

Description

1.1

Introduction

The Model 1901 Microprocessor-Based Temperature
Indicator is a 3-digit instrument designed to operate in
conjunction with a silicon diode sensor to furnish accu-
rate temperature measurement over the range of 1.5 to
450 K.
Typical voltage-vs-temperature data are stored in inter-
nal EPROMs to match the instrument to the Leybold Sili-
. . . . . . 20 con Diode Type D.
The Model 1901 Temperature Indicator has two alarm
setpoints, two associated alarm relay outputs, and an
RS-232C interface port.
Two front-panel switches enable the user to set the tem-
perature alarm points.
1.2

Standard Specification

MODEL 1901 Temperature Indicator.
Cat. No. 136 45 with the following accessories
• Power supply for 220 V, 50 Hz (works also at 230 V)
• 5-pole plug for silicon diodes
• Interface cable with plug for MODEL 1901, 2 m long
GA 12.309/3 - 11/2002