User Guide

3
Specification
General:
Chart diameter 255mm
Writing width 105mm
Intrinsic error ± 1% span maximum (±2% R.H. for hygroscopic
membrane system)
Operating temperature limits –10
o
to +50
o
C Except for
Operating humidity limits 0 to 80% R.H. humidity recorders
Zero error due to ambient temp. variations ±0.05% span/
o
C typical
Chart speeds 1 rev every 12 hours, 24 hours or 7 days
Chart drive Synchronous electric motor or mechanical clock
Power supply voltage and frequency 200/250V or 100/120V, 50 or 60Hz
Mounting Wall or panel
Temperature measuring instruments:
Measuring systems Fluid expansion
Maximum length capillary 30m
Minimum span 40
o
C
Maximum span 500
o
C
Span limits – 30
o
C to +600
o
C
Pressure measuring instruments:
Measuring system Capsule stack, Bourdon tube or coiled tube
Minimum span 0 to 1 bar vacuum or pressure.
Maximum span 1200 bar
Span limits –1 bar to 1200 bar
Connection size Ranges up to 40 bar: a inch B.S.P.) with nut and tail
Ranges over 40 bar: 2 inch B.S.P.) piece for 8mm tube
Humidity measuring instruments:
Measuring systems Sensitive hygroscopic membrane and fluid filled system
for temperature measurement, or wet and dry bulb fluid
expansion systems.
Spans 20 to 100% R.H. (hygroscopic membrane);
0 to 40
o
C (fluid filled systems)
Operating temperature limits 0 to 40
o
C
Operating humidity limits 30 to 85% R.H.
Maximum length of capillary
(wet and dry bulb system) 30m (each bulb)
Electric alarm or control:
Instrument contacts 20mA inductive or 30mA non-inductive load max.
Contact action Make above or below set point as required
Relays Delayed action double pole change-over, 5A, 240V
50Hz non-inductive load, as standard
(Refer to wiring Diagram, p.14).
Relay action Energised above or below set point as required.
Overall dimensions 350mm wide; 137mm deep; 350mm high
(Temp & R.H. 582mm high)
Panel cut-out 318mm diameter
Maximum panel thickness 25mm
Weight 10kg
667788