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0 maintenance & service, 1 troubleshooting, 2 maintenance & service procedures – Condec UPS3210 User Manual

Page 32: 1 case removal and installation, Maintenance & service, Case removal and installation

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UPS3000/UPS3110/UPS3210 Operation and Maintenance Manual

4.0

Maintenance & Service

4.1

Troubleshooting

4.2

Maintenance & Service Procedures

This section outlines the mechanical and BASIC electrical repair procedures for the portable pneumatic pressure
calibrator, model UPS3000/UPS3110/UPS3210. The repair procedures cover the major components and
sub-assemblies which are critical to the proper functioning of the calibrators and that will likely need periodic
maintenance over the life of the unit. Only those persons who are formally trained as skilled technicians should
attempt to repair these units. All relevant safety precautions should be observed due to the presence of electrical
components and high-pressure.

4.2.1

Case Removal and Installation

UPS3000 External Case Removal/Installation

NOTE: Verify pressure has been vented from system prior to case removal. Although not recommended the instrument
may be fully operated with the case removed without any potentially lethal shock hazard to operating personnel, since
accessible internal voltage is nominally 25 VDC.

1. Loosen the two thumbscrews (PN 68916) located at the bottom outermost corners of the front panel.

Screws will remain captivated to front panel but will allow chassis to slide away from rear of case.

2. Use screws to slide front panel/chassis away from case.

3. If all power and pressure connections have been removed. Gently slide panel/chassis out until back edge

of panel/chassis touches lip on front of case.

4. Tilt front of panel/chassis upward slightly and remove from case. Place assembly on a bench top.

Reverse procedure for installation.

Symptom

Problem

Remedy

Display not lit

Unit will not energize

Check fuse, check power source, if
applicable check power switch

Display slowly decreases over time

Leak in system

Check all compression and pipe fittings
with snoop, bottle of liquid leak gas
detector (PN 64781)

Display does not respond when Vernier
knob is turned

No Vernier control

Readjust isolation valves on Orion;
replace O-ring on Vernier piston

Display increases or decreases when
INPUT (Pressure) or VENT valves are
closed

No pressure or vent control

Replace valve seats or O-rings in valves;
check valve needles

Unit will not stay in CAL, display shows
"O", display reads a high value @ zero
PSIG

Transducer over-pressurized

Replace transducer

Low battery indicator on display
illuminates when unit is powered

Low or no battery power

Re-charge battery, check power supply
charging voltage

No display when in battery mode after
charging

Battery will not hold charge

Replace battery

Display will not zero

Perform a ZERO/SPAN calibration

Display will shift, will not be steady

Transducer drifts or possible over
pressure

Replace transducer

Table 4-1. UPS3000/UPS3110/UPS3210 Troubleshooting

This manual is related to the following products: