User Guide

DigiGauge Digital Pressure Gauge
Instruction Manual
Page 1
The Rototherm DigiGauge is a high-accuracy, high-resolution digital pressure indicator housed in a sealed stainless steel case.
Designed for direct mounting, the DigiGauge is suitable for highly accurate measurement of pressure in critical process areas.
The DigiGauge's ceramic diaphragm strain gauge sensor is compatible with most gases and liquids whilst the sealed IP67 case
allows the DigiGauge to be fitted in the most hostile of environments. Two standard AA alkaline cells allow over 12 months' of
continuous operation.
Before Installation
Before installing this gauge, please read these instructions completely, failure to do so could result in permanent damage to the
unit. Particular attention should be given to the following points:-
Pressure rating:- When selecting the full scale pressure range take pressure surge conditions into account.
Medium compatibility:- Check for compatibility between the pressure medium and the wetted parts of the gauge.
System contamination:- Ensure that the DigiGauge and all parts are thoroughly cleaned before installing into any system.
Installation
Installation should be undertaken only by qualified personnel familiar with safety practices and standards relating to pressure sys-
tems.
Location and mounting : It is recommended that the gauge is located where it can be readily inspected and serviced. The
gauge is designed to be supported using the process connection stem alone, no additional mounting brackets are required. Avoid
siting the gauge where there is extreme vibration.
Ambient temperature : Temperature induced errors will be minimised if the gauge can be operated close to the calibration tem-
perature of 20ºC (68ºF).
Fittings and hardware : To allow the gauge to be removed easily for servicing and calibration it is recommended that a service
valve is placed in the pressure line immediately before the DigiGauge. This service valve, together with other fittings and hard-
ware should be of an appropriate pressure rating. If pressure surges are likely to occur it is advisable to fit a pressure limiting
device such as a snubber. Use a siphon tube or 'pig-tail' to isolate the gauge from high temperature pressure media.
When tightening the gaugeuse a spanner applied to the hexagon of the process connection stem - do not tighten by turning the
body of the gauge as this might damage the water-proof seal between the body and pressure block.
Display Units
The display reading may be given in either primary or secondary units of pressure according to the setting of dual-in-line switch
SW1 which is located on the upper (display) circuit board (see figure 1)
As standard, the primary and secondary units of pressure are bar and pounds per square inch (psi). If supplied, the dial film
marked with the secondary units of pressure will be stored between the aluminium dial backing plate and the primary dial film.
Switch position Display units
SW1 OFF Primary units
SW1 ON Secondary units
Display Update Rate
The display reading may updated at a rate of once every 2 seconds or once every 0.5 seconds. Selection of the update rate is
made using SW2.
Switch position Update rate
SW2 OFF Once every 2 seconds
SW2 ON Once every 0.5 seconds
Note that the battery life is specified at the (slower) 2 second update rate and is reduced when operating at the 0.5 second
update rate.