User Guide

2
INTRODUCTION
The C105 series of instruments is designed to measure, record and control process variables such as
temperature, pressure and humidity. A maximum of two measuring systems is provided in each
instrument; a fluid expansion type or bimetallic system is used for temperature recording, a hygroscopic
element or a wet and dry bulb system for humidity and a Bourdon tube or diaphragm for pressure
measurement. The measured values are continuously recorded on a calibrated circular chart which is
rotated at a constant speed by a mechanical or electric clock. Control of the process variable is provided
electrically.
Basic
Type
Number
C10
Recorder
with
105mm
pen
travel
on
circular
chart
5 One
pen
6 Two
pen
1 Temperature
(Fluid
expansion
system)
2 Pressure
(‘C’ Spring–
316 st.steel)
3 Pressure
(Spiral
Bourdon –
phosphor
bronze)
4 Pressure
(Spiral
Bourdon –
321 st.steel)
5 Pressure
Capsule
Stack –
beryllium
copper)
6 Pressure
(Diaphragm
Stack –
beryllium
copper)
7 Relative Humidity
(Goldbeater skin)
– External
9 Pressure
(Coiled Tube –
316 st.steel
No. of
Measuring
Points
Programme
Control Cam
(Single Pen
only)
Measured
Variable
Each Pen
Alarm or Control Mode Set Points
No. 1 No. 2 Nos. 3 & 4
17 Record only – – – – –
Electric Alarm/Control Position of Pen in relation to
with Relay Output Set Point when Relay is energised
00 Two Step Above – None, or any – or C
01 Two Step Below – combination – or C
05 Three Step Below Below applicable –
06 Three Step Above Above to Set Points –
09 High-low Above Below No. 1 & 2 –
03 Double 2 Step Above/Above – – or C
04 Double 2 Step Below/Below – – or C
Contact Action at Set Point
Electric Alarm/Control when Pen moves towards
Contacts only – no Relay outside of Chart
60 Two Step –Contact Mode C Make – – or C
61 Two Step –Contact Mode A Break – None, or any – or C
65 Three Step –Contact Mode AA Break Break combination –
66 Three Step –Contact Mode CC Make Make applicable –
69 High-Low –Contact Mode CA Make Break to Set Points –
63 Double 2 Step –Contact Mode D Make/Make – No. 1 & 2 – or C
64 Double 2 Step –Contact Mode B Break/Break – – or C
Notes:
Code No. is built up thus:
Single Pen C105/1 1 63 C
One Pen
Temperature
Double 2 Step –
Contacts only (no relay)
Programme Cam
Two Pen C106/3 00/1 17
Two Pens
No. 1 Pen – Pressure (Bourdon)
– 2 Step Elec. Alarm
with Relay
No. 2 Pen – Temperature
– Record only
(
(
(