SETUP AND CALIBRATION

Before using the gauge to make measurements, you must: • Calibrate it to relate the detection of radiation from the source to the level of

the process material. • Calibrate the current loop to a reference ammeter or the DCS.

Current loop (analog output calibration) Before a current loop calibration: Connect an ammeter anywhere along the current loop (in series). Make sure there is a 250 – 800 Ω load on the current loop. If no load or an insufficient load exists on the loop, it may require temporary placement of a resistor. Hook the meter in series with the load resistor. Open Ohmview 2000™ and perform the following steps to calibrate the current loop. Setting up 4 mA 1. Select Calibration | Current Loop Cal. 2. Click Execute. 3. Click OK. 4. Read the ammeter; enter the actual milliamp reading. 5. Click OK. 6. Click YES if the ammeter reads 4.00 mA or NO for any other reading. 7. Repeat until the meter reads 4.00 mA. The meter approaches the 4.00 mA

successively. 8. Read the ammeter; enter the actual milliamp reading. 9. Click OK. 10. Click OK. Setting up 20 mA 11. Read the ammeter; enter the actual milliamp reading. 12. Click OK. 13. Click YES if the ammeter reads 20.00 mA or NO for any other reading. 14. Repeat until the meter reads 20.00 mA. The meter approaches the 20.00 mA

successively. 15. Read the ammeter; enter the actual milliamp reading. 16. Click OK. 17. Click OK.

Selecting the linearity For information on linearity options, see the LFXG-H Installation and Operation Guide. 1. Select Setup | Gauge Setup | Linearizer Type. 2. Click Table | Non-linear or Table - Linear.

Calibrating the level gauge See the LFXG-H Installation and Operation Guide for further information on calibration requirements.

Standard method (2-point) Simple method 1. Setting the low level and collecting Cal Low data* Skips steps 3 and 4. 2. Setting the high level and collecting Cal High data* 3. Collecting the linearizer table data* 4. Calculating the linearity 5. Calculating the calibration * Perform these data collection steps in any sequence, depending on your ability to empty and fill the vessel. Two point process calibration (preferred method) You must provide high and low process conditions when performing a two point calibration. If using the standard method, it may be helpful to record the sensor counts and levels at each step: Setting low level 1. Select Calibration | 2 Point Calibration | Cal Low Collect. 2. Click Start. 3. Click Accept. 4. Enter the actual value in engineering units. 5. Click OK.

Setting high level 1. Select Calibration | 2 Point Calibration | Cal High Collect. 2. Click Start. 3. Click Accept. 4. Enter the actual value in engineering units. 5. Click OK. Collecting linearizer table data 1. Select Calibration | Linearizer Data Pt | Create Data Point. 2. At the prompt, enter the actual known level of process. 3. Accept or reject the results when they appear. 4. Repeat procedure for all available levels. Calculating the linearizer 1. Select Calibration | Linearizer Data Pt | Recalculate. 2. Click OK to proceed with the linearity calculation. The linearizer table

calculates based on the level values. Calculating the calibration 1. Select Calibration | 2 Point Calibration. 2. Click Calculate Results. 3. Click OK. 4. Click OK. Data type Sensor counts Actual level

(engineering units)

Cal low level (usually empty)

Linearizer data point 0

1

2

3

4

5

6

7

8

9

Cal high level (usually full)

Linearizer data point 10

Ohmart/VEGA Customer Service information To request field service within the United States and Canada, call 513-272-0131 or e-mail fieldservice@ohmart.com. Customers outside of the United States and Canada should contact their local Ohmart/VEGA representative for parts and service.

Copyright 2005 Ohmart/VEGA Corporation, Cincinnati, Ohio. All rights reserved. This document contains proprietary information of Ohmart/VEGA Corporation. It shall not be reproduced in whole or in part, in any form, without the expressed written permission of Ohmart/VEGA Corporation. The material in this document is provided for informational purposes and is subject to change without notice.

LFXG-H QUICK REFERENCE STARTUP GUIDE

Version 1.0

SAFETY INSTRUCTIONS

Refer to the Radiation Safety Manual and Reference CD that came with your source holder. Always refer to the safety instructions in this guide and the country specific installation standards. Follow the prevailing safety regulations and accident prevention rules of your company and country. General Ambient temperature should be between –20 °C (–4 °F) to +60 °C (+140 °F). There is an option available for lower temperatures. Safety information for EX areas This equipment is suitable for use in the following environment: • CSA Class l, Div 1, Groups A, B, C, & D • CSA Class I, Div 2, Groups A, B, C, & D • CSA Class ll, Div 1 Groups E, F, & G • CSA Class II, Div 2, Groups E, F & G • ATEX Certificate #II2 G/D EEx d IIC TP6 IP66 –20 °C to +60°C or

II2G EEX d IIB+H2 T6 –50 °C to +60°C • NEMA Type 4X IP66 • Non-hazardous locations Special installation, maintenance, or operating instructions If it is necessary to open the sensor, the following warning applies: EXPLOSION HAZARD - Do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous. AVERTISSEMENT: - RISQUE D'EXPLOSION - AVANT DE DÉCONNECTER L'ÉQUIPEMENT, COUPER LE COURANT OU S'ASSURER QUE L’EMPLACEMENT EST DÉSIGNÉ NON DANGEREUX. Caution! Open circuits before removing cover. An explosion-proof seal shall be installed within 450 mm (18”) of the enclosure. AVERTISSEMENT: - Ouvrir les circuits avant d’enlever le couvercle. Un scellement doit être installé à moins de 450 mm du boîtier. Caution! – Allow a minimum of 10 minutes before opening the GEN2000® for internal inspection. This allows time for the gauge to de-energize, cool, and full capacitor discharge.

3152

0-U

S-0

5102

0

Unpacking the equipment • Unpack the unit in a clean, dry area. • Inspect the shipment for completeness by checking against the packing slip. • Inspect the shipment for damage during shipment or storage. • If the detector is included as a separate package in the shipment, inspect the

assembly for damage. If damaged, file a claim against the carrier and report the damage in detail. Any claim on Ohmart/VEGA for shortages, errors in shipment, or other problems must be made within 30 days of receipt of the shipment.

• If you need to return the equipment, refer to the LFXG-H Installation and Operation Guide for information concerning returning equipment for repair.

• After you unpack the equipment, inspect each source holder in the shipment to assure that the source holder is locked.

Storing the equipment • Store the source holder in a clean, dry area. • Verify that the source holder is locked in the off position. • Store the detectors in an area that has a controlled temperature between +10 ºC

and +35 ºC (+50º F and +95 ºF) and less than 50% relative humidity. Mounting Instructions • Your source was sized for optimal performance at the time you ordered your

system. Contact us prior to installation if the location of the equipment is different from the original order location.

• Mounting options: • Bracket mount—the L-bracket supports the electronics housing. For this type of

mounting, the conduit clamps should be spaced every 18 in. (45cm). • Conduit mount—this type of mount consists of an adapter with a 2 in. conduit

coupler (part number 240721). It provides an air hose fitting for applications that must cool the gauge. The pole mount requires a nipple and union.

√ Follow the site specific installation drawings (this may involve installing the gauge in an

inverted position). √ Mount where process material cannot:

Coat the source holder Build up between the vessel wall and the detector housing.

√ Mount where the temperature of the process material is relatively stable. √ Mount the housing as close to the vessel as possible, but outside of any insulation. Note: Protect any insulation from liquids. √ Verify that there is nothing to absorb radiation between the vessel wall and detector

housing. √ If there are internal obstructions, mount the source holder and gauge on an arc other

than a diameter so that the beam of radiation does not cross the obstruction. √ Avoid source cross-talk when there are multiple adjacent pipes or vessels that have

source holders and detectors. The best orientation, in this case, is for the source holders to be on the inside with the radiation beams pointing away from each other.

Mounting Instructions (continued)

√ The detector’s active area (where it is possible to make a level measurement) is between 1" (25mm) from the bottom of the GEN2000 housing to the end of the flexible conduit. Mount the detector so this area spans the measurement length.

Disconnect switch Install a power line switch no more than one meter from the operator control station. Conduit • Conduit runs must be continuous and protected so that moisture condensation does

not drip into any of the housings or junction boxes. Use sealant in the conduit, or arrange the runs so that they are below the entries to the housings and use weep holes where permitted.

• Use a conduit explosion-proof seal in the proximity of the housing when the location is in a hazardous area. Requirements for the actual distance must be in accordance with local code.

• If you use only one conduit hub, plug the other conduit hub to prevent the entry of dirt and moisture.

Note: For European ATEX hazardous area applications, all cable glands or hubs must be EExd rated. Checklist for field service commissioning

Mount the source holder and level gauge per the drawings (allow access for future maintenance).

Make all wiring connections using the certified drawings and the instructions in this guide.

If using AC power, ensure that the AC input voltage matches the requirements found on the nameplate of the unit.

Ensure that the AC power to the transmitter is a regulated transient-free power source (UPS type power is best).

If using DC power, verify that the ripple is less than 100mV. Have process ready for calibration. When possible, it is best to be able to completely

fill and empty the vessel at the high and low levels. Do not remove the source holder lock until the unit is ready for calibration. (Lock can

only be removed by a licensed individual.) Apply power to the gauge 4 hours before starting calibration.

Note: The equipment warranty is void if there is any damage to the gauge due to incorrect wiring that has not been checked by an Ohmart/VEGA Field Service Engineer.

WIRING THE EQUIPMENT Make the connections at the removable terminal strips mounted on the power board. Access the power board by removing the explosion-proof housing cap. There is an internal and external ground screw for connection of the power earth ground wire. Remove the top cover to access the ground screws.

Caution! Do Not Apply Power until a thorough check of all the wiring is complete. • The AC power source voltage input is 100–230 VAC ±10% (90–250 VAC) at

50–60 Hz, at 15 VA (or 25 VA with optional heater) maximum power consumption. • AC power must not be shared with transient-producing loads. Use an individual AC

lighting circuit. Supply a separate earth ground. • The DC power source voltage input is 20–60 VDC (<100 mV, 1–1,000 Hz ripple) at

15 VA maximum power consumption. DC power cable can be part of a single cable 4-wire hookup, or can be separate from output signal cable.

• Use wire for power per local code. • Wire should be suitable for +40 °C above surrounding ambient temperature. • All field wiring must have insulation suitable for 250 volts or higher. Note: Not all connections are required for operation. The power input terminals are not polarity-sensitive. HART® signal may not operate with some isolating barriers or other non-resistive loads. Output current loop Output signal is 4–20 mA into 250–800 Ω load. Pin 13 is + and Pin 14 is -. HART communication protocol (BEL202 FSK standard) is available on these connections. The output is isolated to standard ISA 50.1 Type 4 Class U. When using signal (4–20 mA output) cables that Ohmart/VEGA did not supply, they must meet these specifications: • Maximum cable length is 1,000 m (3,280 ft.) • All wires should be per local code

When using DC power, the signal and power can run on a single cable 4-wire hookup (2 wires for power, 2 for 4–20 mA). Auxiliary input frequency signal Frequency input signal is 0–100 kHz ≤, true digital. Relay Relay contacts are rated at 6 A at 240 VAC, 6 A at 24 VDC, or 1/4 HP at 120 VAC. RS-485 The RS-485 connections are labeled on the CPU board. The maximum cable length is 609 meters (2,000 ft.). Use shielded wire per local code. Connect positive terminals together. Connect negative terminals together. Connect ground terminals together.

1/4" fitting foroptional air hose

2" conduit

2" NPT pipe nipple

2" NPT threadedconduit adapter

1 1/4" conduit clamps with 1/4"mounting hole

Optional pipe mountingshown

3/4" NPT �(2 places)

Conduit Mounting Bracket Mounting

1/2-13 (12mm)�hardware (4 places)

Relay:- normally open- common- normally closed

L1 AC or DC power input

L2

RY NO

RY C

RY NC

Not used in HART app lica tions

Auxiliary input power

Common

Auxiliary input f requency signa l

Current loop output

Interconnecting term inals — GEN2000 with HART

RS-485 terminal