Installation and Maintenance Instructions for
N5500 Capsule Pressure Gauges
© Ashcroft Inc. 2019, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0357, www.ashcroft.com
All sales subject to standard terms and conditions of sale. n5500_gauge_im_RevA_03-10-21
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6.2 Installation
Devices with a blow-out require a minimum spacing to the rear
(1.0˝).
• Connection to be undertaken by authorized and qualified
personnel only
• Use only with the mechanical process connection provided
– regarding the configuration, see order code on the device
type label, with a matching threaded seal.
• When connecting the device, the pipes must be depressurized.
• The pressure metering pipe must be kept as short as possible
and laid without sharp bends, to avoid the occurrence of
delays.
• Devices with a blow-out require a minimum spacing to the
rear (1.0˝).
6.3 Start Up
The precondition for start-up is proper installation of all elec-
trical feed lines and metering pipes. All connecting lines must
be laid such that no mechanical forces can act on the device.
Before start-up, the seal on the pressurized connection line
must be checked
6.4 Zero point adjustment
The N5500 are supplied calibrated, so that as a rule there is no
need for calibration works at the installation point. Zero point
adjustment on site is standard. For this, proceed as follows:
Depressurize the pressure metering pipe.
• Open the bayonet ring and remove ring and window.
• Hold the pointer in place while turning the screw, until the
pointer (after releasing again) has the correct position.
• Close the case again and pay attention to correct fit of
window, gasket and bayonet ring.
• Liquid filled gauges must
be demounted before the
zero point adjustment can
be done (on a horizontal
area to prevent leaking).
7 SERVICING
The N5500 is maintenance-free. However, to ensure reliable
operation and a long lifetime, it is recommended that it is
checked regularly.
7.1 Safety
When undertaking servicing work on the N5500, the pressure
lines must be depressurized and the plant secured against being
switched on again.
7.2 In-service inspection
The check on function and recalibration is carried out at regular
intervals, depending on the application. The precise testing
cycles should be adjusted in line with the operating conditions
and ambient conditions. In the event of various device
components interacting, the operating instructions for all other
devices should also be taken into account.
• Check on display.
• Check on function, in conjunction with downstream
components
• Check of pressurized connection pipes for seal condition.
• Remove gauge from service should any leaks be identified.
7.3 Cleaning and maintenance
Cleaning is carried out using a non-aggressive cleaning agent,
with the ventilation valve closed and respecting the protection
category of the N5500.
8 APPENDIX
The N5500 is maintenance-free. However, to ensure reliable
operation and a long lifetime for the N5500, we recommend
that it is checked regularly.
8.1 Data sheet for capsule pressure gauge N5500
Detailed data sheet is available from the Ashcroft website.
Please visit www.ashcroft.com for more details
